core.c revision 02fa3ec01a0df7a8ccc356d8e245a9a1423b3596
1414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* 2414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * core.c -- Voltage/Current Regulator framework. 3414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 4414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Copyright 2007, 2008 Wolfson Microelectronics PLC. 5a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Copyright 2008 SlimLogic Ltd. 6414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 7a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Author: Liam Girdwood <lrg@slimlogic.co.uk> 8414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 9414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This program is free software; you can redistribute it and/or modify it 10414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * under the terms of the GNU General Public License as published by the 11414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Free Software Foundation; either version 2 of the License, or (at your 12414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * option) any later version. 13414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 14414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 15414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 16414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/kernel.h> 17414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/init.h> 18414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/device.h> 195a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 20414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/err.h> 21414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/mutex.h> 22414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/suspend.h> 2331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown#include <linux/delay.h> 24414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/regulator/consumer.h> 25414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/regulator/driver.h> 26414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/regulator/machine.h> 27414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2802fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown#define CREATE_TRACE_POINTS 2902fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown#include <trace/events/regulator.h> 3002fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 3134abbd68efe09765465b81dfedeee9994f13302fMark Brown#include "dummy.h" 3234abbd68efe09765465b81dfedeee9994f13302fMark Brown 33414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#define REGULATOR_VERSION "0.5" 34414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 35414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic DEFINE_MUTEX(regulator_list_mutex); 36414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic LIST_HEAD(regulator_list); 37414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic LIST_HEAD(regulator_map_list); 38ca7255614e0861e36480103f4a402a115803d7b5Mark Brownstatic int has_full_constraints; 39688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brownstatic bool board_wants_dummy_regulator; 40414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 418dc5390d4f3fd8acc73773a56fea13544e7924dcMark Brown/* 42414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator_map 43414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 44414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Used to provide symbolic supply names to devices. 45414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 46414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_map { 47414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; 4840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *dev_name; /* The dev_name() for the consumer */ 49414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply; 50a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *regulator; 51414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 52414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 53414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* 54414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator 55414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 56414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * One for each consumer device. 57414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 58414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator { 59414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev; 60414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; 61414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA_load; 62414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uV; 63414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int max_uV; 64414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char *supply_name; 65414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute dev_attr; 66414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 67414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 68414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 69414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev); 708cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlylestatic int _regulator_disable(struct regulator_dev *rdev, 718cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev **supply_rdev_ptr); 72414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev); 73414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev); 74414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev); 75414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 76414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data); 77414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 781083c39346d482b9001944d05c09191027892226Mark Brownstatic const char *rdev_get_name(struct regulator_dev *rdev) 791083c39346d482b9001944d05c09191027892226Mark Brown{ 801083c39346d482b9001944d05c09191027892226Mark Brown if (rdev->constraints && rdev->constraints->name) 811083c39346d482b9001944d05c09191027892226Mark Brown return rdev->constraints->name; 821083c39346d482b9001944d05c09191027892226Mark Brown else if (rdev->desc->name) 831083c39346d482b9001944d05c09191027892226Mark Brown return rdev->desc->name; 841083c39346d482b9001944d05c09191027892226Mark Brown else 851083c39346d482b9001944d05c09191027892226Mark Brown return ""; 861083c39346d482b9001944d05c09191027892226Mark Brown} 871083c39346d482b9001944d05c09191027892226Mark Brown 88414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* gets the regulator for a given consumer device */ 89414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *get_device_regulator(struct device *dev) 90414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 91414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = NULL; 92414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 93414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 94414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 95414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 96414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 97414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) { 98414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev == dev) { 99414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 101414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 103414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 106414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 107414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 108414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 110414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Platform voltage constraint check */ 111414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_voltage(struct regulator_dev *rdev, 112414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int *min_uV, int *max_uV) 113414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 114414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BUG_ON(*min_uV > *max_uV); 115414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 116414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 117414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 1181083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev)); 119414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 120414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 121414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) { 122414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 1231083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 124414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 126414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 127414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*max_uV > rdev->constraints->max_uV) 128414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *max_uV = rdev->constraints->max_uV; 129414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uV < rdev->constraints->min_uV) 130414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *min_uV = rdev->constraints->min_uV; 131414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 132414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uV > *max_uV) 133414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 134414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 135414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 137414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 138414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* current constraint check */ 139414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_current_limit(struct regulator_dev *rdev, 140414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int *min_uA, int *max_uA) 141414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 142414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BUG_ON(*min_uA > *max_uA); 143414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 144414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 145414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 1461083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev)); 147414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 148414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 149414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_CURRENT)) { 150414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 1511083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 152414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 153414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 154414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*max_uA > rdev->constraints->max_uA) 156414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *max_uA = rdev->constraints->max_uA; 157414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uA < rdev->constraints->min_uA) 158414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *min_uA = rdev->constraints->min_uA; 159414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 160414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uA > *max_uA) 161414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 162414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 163414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 164414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 165414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 166414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* operating mode constraint check */ 167414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_mode(struct regulator_dev *rdev, int mode) 168414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 169e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell switch (mode) { 170e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_FAST: 171e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_NORMAL: 172e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_IDLE: 173e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_STANDBY: 174e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell break; 175e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell default: 176e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell return -EINVAL; 177e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell } 178e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell 179414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 180414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 1811083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev)); 182414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 183414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 184414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) { 185414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 1861083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 187414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 188414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 189414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_modes_mask & mode)) { 190414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid mode %x for %s\n", 1911083c39346d482b9001944d05c09191027892226Mark Brown __func__, mode, rdev_get_name(rdev)); 192414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 193414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 194414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 195414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 196414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 197414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* dynamic regulator mode switching constraint check */ 198414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_drms(struct regulator_dev *rdev) 199414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 200414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 201414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 2021083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev)); 203414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 204414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 205414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) { 206414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 2071083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 208414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 209414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 210414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 211414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 212414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 213414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t device_requested_uA_show(struct device *dev, 214414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 215414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 216414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 217414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 218414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = get_device_regulator(dev); 219414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 220414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 221414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 222414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", regulator->uA_load); 223414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 224414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 225414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uV_show(struct device *dev, 226414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 227414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 228a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ssize_t ret; 230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = sprintf(buf, "%d\n", _regulator_get_voltage(rdev)); 233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 234414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 235414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 236414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2377ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(microvolts, 0444, regulator_uV_show, NULL); 238414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 239414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uA_show(struct device *dev, 240414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 242a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 243414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 244414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev)); 245414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2467ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(microamps, 0444, regulator_uA_show, NULL); 247414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 248bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brownstatic ssize_t regulator_name_show(struct device *dev, 249bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown struct device_attribute *attr, char *buf) 250bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown{ 251bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown struct regulator_dev *rdev = dev_get_drvdata(dev); 252bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 2531083c39346d482b9001944d05c09191027892226Mark Brown return sprintf(buf, "%s\n", rdev_get_name(rdev)); 254bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown} 255bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 2564fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_print_opmode(char *buf, int mode) 257414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 258414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (mode) { 259414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_FAST: 260414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "fast\n"); 261414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_NORMAL: 262414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "normal\n"); 263414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_IDLE: 264414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "idle\n"); 265414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_STANDBY: 266414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "standby\n"); 267414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 268414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 269414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 270414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2714fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_opmode_show(struct device *dev, 2724fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct device_attribute *attr, char *buf) 273414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 274a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2764fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, _regulator_get_mode(rdev)); 2774fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell} 2787ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(opmode, 0444, regulator_opmode_show, NULL); 2794fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 2804fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_print_state(char *buf, int state) 2814fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell{ 282414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state > 0) 283414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "enabled\n"); 284414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else if (state == 0) 285414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "disabled\n"); 286414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 287414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 288414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 289414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2904fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_state_show(struct device *dev, 2914fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct device_attribute *attr, char *buf) 2924fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell{ 2934fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct regulator_dev *rdev = dev_get_drvdata(dev); 2949332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown ssize_t ret; 2959332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown 2969332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_lock(&rdev->mutex); 2979332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown ret = regulator_print_state(buf, _regulator_is_enabled(rdev)); 2989332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_unlock(&rdev->mutex); 2994fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 3009332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown return ret; 3014fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell} 3027ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(state, 0444, regulator_state_show, NULL); 3034fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 304853116a10544206b6b2cf42ebc9d78fba2668888David Brownellstatic ssize_t regulator_status_show(struct device *dev, 305853116a10544206b6b2cf42ebc9d78fba2668888David Brownell struct device_attribute *attr, char *buf) 306853116a10544206b6b2cf42ebc9d78fba2668888David Brownell{ 307853116a10544206b6b2cf42ebc9d78fba2668888David Brownell struct regulator_dev *rdev = dev_get_drvdata(dev); 308853116a10544206b6b2cf42ebc9d78fba2668888David Brownell int status; 309853116a10544206b6b2cf42ebc9d78fba2668888David Brownell char *label; 310853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 311853116a10544206b6b2cf42ebc9d78fba2668888David Brownell status = rdev->desc->ops->get_status(rdev); 312853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (status < 0) 313853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return status; 314853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 315853116a10544206b6b2cf42ebc9d78fba2668888David Brownell switch (status) { 316853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_OFF: 317853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "off"; 318853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 319853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_ON: 320853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "on"; 321853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 322853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_ERROR: 323853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "error"; 324853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 325853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_FAST: 326853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "fast"; 327853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 328853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_NORMAL: 329853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "normal"; 330853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 331853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_IDLE: 332853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "idle"; 333853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 334853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_STANDBY: 335853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "standby"; 336853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 337853116a10544206b6b2cf42ebc9d78fba2668888David Brownell default: 338853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return -ERANGE; 339853116a10544206b6b2cf42ebc9d78fba2668888David Brownell } 340853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 341853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return sprintf(buf, "%s\n", label); 342853116a10544206b6b2cf42ebc9d78fba2668888David Brownell} 343853116a10544206b6b2cf42ebc9d78fba2668888David Brownellstatic DEVICE_ATTR(status, 0444, regulator_status_show, NULL); 344853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 345414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uA_show(struct device *dev, 346414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 347414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 348a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 350414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 351414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 352414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uA); 354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3557ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(min_microamps, 0444, regulator_min_uA_show, NULL); 356414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 357414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uA_show(struct device *dev, 358414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 359414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 360a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 362414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 363414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 364414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 365414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uA); 366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3677ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(max_microamps, 0444, regulator_max_uA_show, NULL); 368414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 369414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uV_show(struct device *dev, 370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 372a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 374414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 375414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 376414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 377414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uV); 378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3797ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(min_microvolts, 0444, regulator_min_uV_show, NULL); 380414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 381414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uV_show(struct device *dev, 382414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 383414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 384a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 388414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uV); 390414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3917ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(max_microvolts, 0444, regulator_max_uV_show, NULL); 392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 393414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_total_uA_show(struct device *dev, 394414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 396a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA = 0; 399414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 400414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 401414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) 402fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese uA += regulator->uA_load; 403414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 404414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", uA); 405414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4067ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL); 407414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 408414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_num_users_show(struct device *dev, 409414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 410414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 411a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 412414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->use_count); 413414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 415414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_type_show(struct device *dev, 416414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 417414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 418a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 420414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (rdev->desc->type) { 421414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_VOLTAGE: 422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "voltage\n"); 423414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_CURRENT: 424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "current\n"); 425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 426414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 427414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 428414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 429414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_uV_show(struct device *dev, 430414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 431414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 432a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 433414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 434414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV); 435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4367ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_microvolts, 0444, 4377ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_uV_show, NULL); 438414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 439414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_uV_show(struct device *dev, 440414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 441414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 442a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 443414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 444414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV); 445414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4467ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_microvolts, 0444, 4477ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_uV_show, NULL); 448414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 449414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_uV_show(struct device *dev, 450414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 452a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV); 455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4567ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_microvolts, 0444, 4577ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_uV_show, NULL); 458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 459414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_mode_show(struct device *dev, 460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 462a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4644fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4654fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_mem.mode); 466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4677ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_mode, 0444, 4687ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_mode_show, NULL); 469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 470414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_mode_show(struct device *dev, 471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 473a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 474414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4754fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4764fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_disk.mode); 477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4787ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_mode, 0444, 4797ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_mode_show, NULL); 480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 481414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_mode_show(struct device *dev, 482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 484a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 485414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4864fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4874fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_standby.mode); 488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4897ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_mode, 0444, 4907ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_mode_show, NULL); 491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_state_show(struct device *dev, 493414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 494414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 495a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 496414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4974fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 4984fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_mem.enabled); 499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 5007ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_state, 0444, 5017ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_state_show, NULL); 502414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 503414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_state_show(struct device *dev, 504414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 505414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 506a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 507414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 5084fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 5094fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_disk.enabled); 510414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 5117ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_state, 0444, 5127ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_state_show, NULL); 513414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 514414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_state_show(struct device *dev, 515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 516414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 517a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 5194fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 5204fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_standby.enabled); 521414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 5227ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_state, 0444, 5237ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_state_show, NULL); 5247ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 525bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 5267ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell/* 5277ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * These are the only attributes are present for all regulators. 5287ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * Other attributes are a function of regulator functionality. 5297ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct device_attribute regulator_dev_attrs[] = { 531bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown __ATTR(name, 0444, regulator_name_show, NULL), 532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(num_users, 0444, regulator_num_users_show, NULL), 533414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(type, 0444, regulator_type_show, NULL), 534414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR_NULL, 535414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 536414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void regulator_dev_release(struct device *dev) 538414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 539a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(rdev); 541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct class regulator_class = { 544414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .name = "regulator", 545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_release = regulator_dev_release, 546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_attrs = regulator_dev_attrs, 547414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 548414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Calculate the new optimum regulator operating mode based on the new total 550414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumer load. All locks held by caller */ 551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void drms_uA_update(struct regulator_dev *rdev) 552414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *sibling; 554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int current_uA = 0, output_uV, input_uV, err; 555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 556414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 557414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_drms(rdev); 558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0 || !rdev->desc->ops->get_optimum_mode || 559036de8efae4b81f8e1504fab654070cecce6dfa9Dan Carpenter !rdev->desc->ops->get_voltage || !rdev->desc->ops->set_mode) 560036de8efae4b81f8e1504fab654070cecce6dfa9Dan Carpenter return; 561414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) 565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 569414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 570414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 571414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 572414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) 573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 574414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load */ 576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(sibling, &rdev->consumer_list, list) 577fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese current_uA += sibling->uA_load; 578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now get the optimum mode for our new total regulator load */ 580414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV, 581414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV, current_uA); 582414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 583414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check the new mode is allowed */ 584414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_mode(rdev, mode); 585414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err == 0) 586414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->ops->set_mode(rdev, mode); 587414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 588414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 589414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_set_state(struct regulator_dev *rdev, 590414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_state *rstate) 591414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 592414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 593638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown bool can_set_state; 594638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown 595638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown can_set_state = rdev->desc->ops->set_suspend_enable && 596638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown rdev->desc->ops->set_suspend_disable; 597638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown 598638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown /* If we have no suspend mode configration don't set anything; 599638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown * only warn if the driver actually makes the suspend mode 600638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown * configurable. 601638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown */ 602638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (!rstate->enabled && !rstate->disabled) { 603638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (can_set_state) 604638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown printk(KERN_WARNING "%s: No configuration for %s\n", 605638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown __func__, rdev_get_name(rdev)); 606638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown return 0; 607638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown } 608638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown 609638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (rstate->enabled && rstate->disabled) { 610638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown printk(KERN_ERR "%s: invalid configuration for %s\n", 611638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown __func__, rdev_get_name(rdev)); 612638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown return -EINVAL; 613638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown } 614414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 615638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (!can_set_state) { 616a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR "%s: no way to set suspend state\n", 617a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood __func__); 618414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 619a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 620414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 621414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rstate->enabled) 622414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_enable(rdev); 623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_disable(rdev); 625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enabled/disable\n", __func__); 627414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) { 631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV); 632414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set voltage\n", 634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__); 635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 637414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) { 640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode); 641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set mode\n", __func__); 643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 644414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by caller */ 650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state) 651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (state) { 656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_STANDBY: 657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_standby); 659414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MEM: 660414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 661414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_mem); 662414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MAX: 663414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 664414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_disk); 665414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood default: 666414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 667414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 668414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 669414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 670414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void print_constraints(struct regulator_dev *rdev) 671414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 672414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulation_constraints *constraints = rdev->constraints; 673973e9a2795b3b41d8408a0bb6f87b783c5efc88aMark Brown char buf[80] = ""; 6748f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown int count = 0; 6758f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown int ret; 676414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 6778f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (constraints->min_uV && constraints->max_uV) { 678414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uV == constraints->max_uV) 6798f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d mV ", 6808f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uV / 1000); 681414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 6828f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d <--> %d mV ", 6838f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uV / 1000, 6848f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->max_uV / 1000); 6858f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown } 6868f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 6878f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (!constraints->min_uV || 6888f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uV != constraints->max_uV) { 6898f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown ret = _regulator_get_voltage(rdev); 6908f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (ret > 0) 6918f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "at %d mV ", ret / 1000); 6928f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown } 6938f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 6948f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (constraints->min_uA && constraints->max_uA) { 695414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uA == constraints->max_uA) 6968f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d mA ", 6978f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uA / 1000); 698414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 6998f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d <--> %d mA ", 7008f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uA / 1000, 7018f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->max_uA / 1000); 7028f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown } 7038f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 7048f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (!constraints->min_uA || 7058f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uA != constraints->max_uA) { 7068f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown ret = _regulator_get_current_limit(rdev); 7078f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (ret > 0) 708e4a6376b3b2999d169b602a582a8819d95ff79bcCyril Chemparathy count += sprintf(buf + count, "at %d mA ", ret / 1000); 709414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 7108f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 711414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_FAST) 712414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "fast "); 713414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL) 714414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "normal "); 715414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE) 716414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "idle "); 717414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY) 718414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "standby"); 719414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 7201083c39346d482b9001944d05c09191027892226Mark Brown printk(KERN_INFO "regulator: %s: %s\n", rdev_get_name(rdev), buf); 721414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 722414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 723e79055d62ea6ca3c36962209f4c819614972c95aMark Brownstatic int machine_constraints_voltage(struct regulator_dev *rdev, 7241083c39346d482b9001944d05c09191027892226Mark Brown struct regulation_constraints *constraints) 725a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 726e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown struct regulator_ops *ops = rdev->desc->ops; 7271083c39346d482b9001944d05c09191027892226Mark Brown const char *name = rdev_get_name(rdev); 728af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown int ret; 7293a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown unsigned selector; 730af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown 731af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown /* do we need to apply the constraint voltage */ 732af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown if (rdev->constraints->apply_uV && 733af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints->min_uV == rdev->constraints->max_uV && 734af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown ops->set_voltage) { 735af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown ret = ops->set_voltage(rdev, 7363a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown rdev->constraints->min_uV, 7373a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown rdev->constraints->max_uV, 7383a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown &selector); 739af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown if (ret < 0) { 740af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown printk(KERN_ERR "%s: failed to apply %duV constraint to %s\n", 741af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown __func__, 742af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints->min_uV, name); 743af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints = NULL; 744af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown return ret; 745af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown } 746af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown } 747e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown 7484367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* constrain machine-level voltage specs to fit 7494367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * the actual range supported by this regulator. 7504367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 7514367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ops->list_voltage && rdev->desc->n_voltages) { 7524367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int count = rdev->desc->n_voltages; 7534367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int i; 7544367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int min_uV = INT_MAX; 7554367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int max_uV = INT_MIN; 7564367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int cmin = constraints->min_uV; 7574367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int cmax = constraints->max_uV; 7584367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7593e59091828ed5406c879b899b4257fcef7271e2cMark Brown /* it's safe to autoconfigure fixed-voltage supplies 7603e59091828ed5406c879b899b4257fcef7271e2cMark Brown and the constraints are used by list_voltage. */ 7614367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (count == 1 && !cmin) { 7623e59091828ed5406c879b899b4257fcef7271e2cMark Brown cmin = 1; 7634367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell cmax = INT_MAX; 7643e59091828ed5406c879b899b4257fcef7271e2cMark Brown constraints->min_uV = cmin; 7653e59091828ed5406c879b899b4257fcef7271e2cMark Brown constraints->max_uV = cmax; 7664367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7674367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7683e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown /* voltage constraints are optional */ 7693e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown if ((cmin == 0) && (cmax == 0)) 770e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return 0; 7713e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown 7724367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* else require explicit machine-level constraints */ 7733e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown if (cmin <= 0 || cmax <= 0 || cmax < cmin) { 7744367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_err("%s: %s '%s' voltage constraints\n", 7754367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, "invalid", name); 776e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return -EINVAL; 7774367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7784367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7794367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* initial: [cmin..cmax] valid, [min_uV..max_uV] not */ 7804367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell for (i = 0; i < count; i++) { 7814367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int value; 7824367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7834367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell value = ops->list_voltage(rdev, i); 7844367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value <= 0) 7854367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell continue; 7864367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7874367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* maybe adjust [min_uV..max_uV] */ 7884367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value >= cmin && value < min_uV) 7894367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell min_uV = value; 7904367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value <= cmax && value > max_uV) 7914367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell max_uV = value; 7924367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7934367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7944367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* final: [min_uV..max_uV] valid iff constraints valid */ 7954367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (max_uV < min_uV) { 7964367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_err("%s: %s '%s' voltage constraints\n", 7974367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, "unsupportable", name); 798e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return -EINVAL; 7994367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8004367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 8014367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* use regulator's subset of machine constraints */ 8024367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (constraints->min_uV < min_uV) { 8034367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_debug("%s: override '%s' %s, %d -> %d\n", 8044367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, name, "min_uV", 8054367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->min_uV, min_uV); 8064367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->min_uV = min_uV; 8074367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8084367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (constraints->max_uV > max_uV) { 8094367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_debug("%s: override '%s' %s, %d -> %d\n", 8104367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, name, "max_uV", 8114367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->max_uV, max_uV); 8124367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->max_uV = max_uV; 8134367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8144367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8154367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 816e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return 0; 817e79055d62ea6ca3c36962209f4c819614972c95aMark Brown} 818e79055d62ea6ca3c36962209f4c819614972c95aMark Brown 819e79055d62ea6ca3c36962209f4c819614972c95aMark Brown/** 820e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * set_machine_constraints - sets regulator constraints 821e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * @rdev: regulator source 822e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * @constraints: constraints to apply 823e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * 824e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * Allows platform initialisation code to define and constrain 825e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * regulator circuits e.g. valid voltage/current ranges, etc. NOTE: 826e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * Constraints *must* be set by platform code in order for some 827e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * regulator operations to proceed i.e. set_voltage, set_current_limit, 828e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * set_mode. 829e79055d62ea6ca3c36962209f4c819614972c95aMark Brown */ 830e79055d62ea6ca3c36962209f4c819614972c95aMark Brownstatic int set_machine_constraints(struct regulator_dev *rdev, 831e79055d62ea6ca3c36962209f4c819614972c95aMark Brown struct regulation_constraints *constraints) 832e79055d62ea6ca3c36962209f4c819614972c95aMark Brown{ 833e79055d62ea6ca3c36962209f4c819614972c95aMark Brown int ret = 0; 834e79055d62ea6ca3c36962209f4c819614972c95aMark Brown const char *name; 835e79055d62ea6ca3c36962209f4c819614972c95aMark Brown struct regulator_ops *ops = rdev->desc->ops; 836e79055d62ea6ca3c36962209f4c819614972c95aMark Brown 837af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints = constraints; 838af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown 8391083c39346d482b9001944d05c09191027892226Mark Brown name = rdev_get_name(rdev); 8401083c39346d482b9001944d05c09191027892226Mark Brown 8411083c39346d482b9001944d05c09191027892226Mark Brown ret = machine_constraints_voltage(rdev, constraints); 842e79055d62ea6ca3c36962209f4c819614972c95aMark Brown if (ret != 0) 843e79055d62ea6ca3c36962209f4c819614972c95aMark Brown goto out; 844e79055d62ea6ca3c36962209f4c819614972c95aMark Brown 845a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* do we need to setup our suspend state */ 846e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (constraints->initial_state) { 847a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = suspend_prepare(rdev, constraints->initial_state); 848e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (ret < 0) { 849e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown printk(KERN_ERR "%s: failed to set suspend state for %s\n", 850e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown __func__, name); 851e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown rdev->constraints = NULL; 852e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown goto out; 853e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown } 854e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown } 855a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 856a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (constraints->initial_mode) { 857a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (!ops->set_mode) { 858a308466c24b4f42bab6945026e938874d22cde50Mark Brown printk(KERN_ERR "%s: no set_mode operation for %s\n", 859a308466c24b4f42bab6945026e938874d22cde50Mark Brown __func__, name); 860a308466c24b4f42bab6945026e938874d22cde50Mark Brown ret = -EINVAL; 861a308466c24b4f42bab6945026e938874d22cde50Mark Brown goto out; 862a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 863a308466c24b4f42bab6945026e938874d22cde50Mark Brown 864a308466c24b4f42bab6945026e938874d22cde50Mark Brown ret = ops->set_mode(rdev, constraints->initial_mode); 865a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (ret < 0) { 866a308466c24b4f42bab6945026e938874d22cde50Mark Brown printk(KERN_ERR 867a308466c24b4f42bab6945026e938874d22cde50Mark Brown "%s: failed to set initial mode for %s: %d\n", 868a308466c24b4f42bab6945026e938874d22cde50Mark Brown __func__, name, ret); 869a308466c24b4f42bab6945026e938874d22cde50Mark Brown goto out; 870a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 871a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 872a308466c24b4f42bab6945026e938874d22cde50Mark Brown 873cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown /* If the constraints say the regulator should be on at this point 874cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown * and we have control then make sure it is enabled. 875cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown */ 876cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown if ((constraints->always_on || constraints->boot_on) && ops->enable) { 877e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown ret = ops->enable(rdev); 878e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown if (ret < 0) { 879e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown printk(KERN_ERR "%s: failed to enable %s\n", 880e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown __func__, name); 881e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown rdev->constraints = NULL; 882e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown goto out; 883e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown } 884e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown } 885e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown 886a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood print_constraints(rdev); 887a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 888a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return ret; 889a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 890a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 891a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 892a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_supply - set regulator supply regulator 89369279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator name 89469279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @supply_rdev: supply regulator name 895a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 896a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Called by platform initialisation code to set the supply regulator for this 897a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator. This ensures that a regulators supply will also be enabled by the 898a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * core if it's child is enabled. 899a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 900a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_supply(struct regulator_dev *rdev, 901a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *supply_rdev) 902a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 903a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int err; 904a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 905a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &supply_rdev->dev.kobj, 906a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "supply"); 907a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (err) { 908a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR 909a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "%s: could not add device link %s err %d\n", 910a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood __func__, supply_rdev->dev.kobj.name, err); 911a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 912a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 913a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->supply = supply_rdev; 914a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->slist, &supply_rdev->supply_list); 915a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 916a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return err; 917a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 918a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 919a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 92006c63f9396133f312c5a49c2285c2c8015e80934Randy Dunlap * set_consumer_device_supply - Bind a regulator to a symbolic supply 92169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator source 92269279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @consumer_dev: device the supply applies to 92340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * @consumer_dev_name: dev_name() string for device supply applies to 92469279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @supply: symbolic name for supply 925a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 926a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Allows platform initialisation code to map physical regulator 927a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * sources to symbolic names for supplies for use by devices. Devices 928a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * should use these symbolic names to request regulators, avoiding the 929a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * need to provide board-specific regulator names as platform data. 93040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * 93140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * Only one of consumer_dev and consumer_dev_name may be specified. 932a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 933a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_consumer_device_supply(struct regulator_dev *rdev, 93440f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown struct device *consumer_dev, const char *consumer_dev_name, 93540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *supply) 936a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 937a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_map *node; 9389ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown int has_dev; 939a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 94040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (consumer_dev && consumer_dev_name) 94140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown return -EINVAL; 94240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 94340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (!consumer_dev_name && consumer_dev) 94440f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown consumer_dev_name = dev_name(consumer_dev); 94540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 946a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (supply == NULL) 947a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -EINVAL; 948a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9499ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (consumer_dev_name != NULL) 9509ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown has_dev = 1; 9519ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown else 9529ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown has_dev = 0; 9539ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown 9546001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell list_for_each_entry(node, ®ulator_map_list, list) { 95523b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula if (node->dev_name && consumer_dev_name) { 95623b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula if (strcmp(node->dev_name, consumer_dev_name) != 0) 95723b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula continue; 95823b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula } else if (node->dev_name || consumer_dev_name) { 9596001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell continue; 96023b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula } 96123b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula 9626001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell if (strcmp(node->supply, supply) != 0) 9636001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell continue; 9646001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell 9656001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell dev_dbg(consumer_dev, "%s/%s is '%s' supply; fail %s/%s\n", 9666001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell dev_name(&node->regulator->dev), 9676001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell node->regulator->desc->name, 9686001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell supply, 9691083c39346d482b9001944d05c09191027892226Mark Brown dev_name(&rdev->dev), rdev_get_name(rdev)); 9706001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell return -EBUSY; 9716001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell } 9726001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell 9739ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown node = kzalloc(sizeof(struct regulator_map), GFP_KERNEL); 974a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (node == NULL) 975a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -ENOMEM; 976a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 977a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->regulator = rdev; 978a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->supply = supply; 979a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9809ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (has_dev) { 9819ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown node->dev_name = kstrdup(consumer_dev_name, GFP_KERNEL); 9829ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (node->dev_name == NULL) { 9839ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown kfree(node); 9849ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown return -ENOMEM; 9859ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown } 98640f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown } 98740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 988a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&node->list, ®ulator_map_list); 989a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return 0; 990a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 991a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9920f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoportstatic void unset_regulator_supplies(struct regulator_dev *rdev) 9930f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport{ 9940f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport struct regulator_map *node, *n; 9950f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport 9960f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport list_for_each_entry_safe(node, n, ®ulator_map_list, list) { 9970f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport if (rdev == node->regulator) { 9980f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport list_del(&node->list); 99940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown kfree(node->dev_name); 10000f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport kfree(node); 10010f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport } 10020f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport } 10030f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport} 10040f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport 1005414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#define REG_STR_SIZE 32 1006414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1007414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *create_regulator(struct regulator_dev *rdev, 1008414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev, 1009414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply_name) 1010414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1011414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 1012414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char buf[REG_STR_SIZE]; 1013414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int err, size; 1014414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1015414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = kzalloc(sizeof(*regulator), GFP_KERNEL); 1016414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 1017414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 1018414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1019414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1020414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev = rdev; 1021414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_add(®ulator->list, &rdev->consumer_list); 1022414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1023414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (dev) { 1024414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* create a 'requested_microamps_name' sysfs entry */ 1025414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "microamps_requested_%s", 1026414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood supply_name); 1027414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 1028414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto overflow_err; 1029414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1030414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev = dev; 10314f26a2abe1eed18dc6adddf2d0ae5553e51578c2Ameya Palande sysfs_attr_init(®ulator->dev_attr.attr); 1032414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.name = kstrdup(buf, GFP_KERNEL); 1033414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev_attr.attr.name == NULL) 1034414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 1035414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1036414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.mode = 0444; 1037414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.show = device_requested_uA_show; 1038414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = device_create_file(dev, ®ulator->dev_attr); 1039414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0) { 1040414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING "%s: could not add regulator_dev" 1041414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood " load sysfs\n", __func__); 1042414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 1043414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1044414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1045414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* also add a link to the device sysfs entry */ 1046414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "%s-%s", 1047414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood dev->kobj.name, supply_name); 1048414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 1049414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 1050414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1051414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->supply_name = kstrdup(buf, GFP_KERNEL); 1052414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->supply_name == NULL) 1053414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 1054414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1055414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &dev->kobj, 1056414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood buf); 1057414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err) { 1058414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING 1059414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood "%s: could not add device link %s err %d\n", 1060414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, dev->kobj.name, err); 1061414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto link_name_err; 1062414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1063414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1064414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1065414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1066414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodlink_name_err: 1067414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 1068414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_err: 1069414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 1070414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_name_err: 1071414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 1072414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodoverflow_err: 1073414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 1074414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 1075414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1076414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 1077414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1078414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 107931aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brownstatic int _regulator_get_enable_time(struct regulator_dev *rdev) 108031aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown{ 108131aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (!rdev->desc->ops->enable_time) 108231aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown return 0; 108331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown return rdev->desc->ops->enable_time(rdev); 108431aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown} 108531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 10865ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/* Internal regulator request function */ 10875ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstatic struct regulator *_regulator_get(struct device *dev, const char *id, 10885ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown int exclusive) 1089414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1090414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1091414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_map *map; 1092414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = ERR_PTR(-ENODEV); 109340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *devname = NULL; 10945ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown int ret; 1095414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1096414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (id == NULL) { 1097414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "regulator: get() with no identifier\n"); 1098414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1099414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 110140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (dev) 110240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown devname = dev_name(dev); 110340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 1104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1106414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(map, ®ulator_map_list, list) { 110740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown /* If the mapping has a device set up it must match */ 110840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (map->dev_name && 110940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown (!devname || strcmp(map->dev_name, devname))) 111040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown continue; 111140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 111240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (strcmp(map->supply, id) == 0) { 1113a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev = map->regulator; 1114414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto found; 1115a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1116414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 111734abbd68efe09765465b81dfedeee9994f13302fMark Brown 1118688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown if (board_wants_dummy_regulator) { 1119688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown rdev = dummy_regulator_rdev; 1120688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown goto found; 1121688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown } 1122688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown 112334abbd68efe09765465b81dfedeee9994f13302fMark Brown#ifdef CONFIG_REGULATOR_DUMMY 112434abbd68efe09765465b81dfedeee9994f13302fMark Brown if (!devname) 112534abbd68efe09765465b81dfedeee9994f13302fMark Brown devname = "deviceless"; 112634abbd68efe09765465b81dfedeee9994f13302fMark Brown 112734abbd68efe09765465b81dfedeee9994f13302fMark Brown /* If the board didn't flag that it was fully constrained then 112834abbd68efe09765465b81dfedeee9994f13302fMark Brown * substitute in a dummy regulator so consumers can continue. 112934abbd68efe09765465b81dfedeee9994f13302fMark Brown */ 113034abbd68efe09765465b81dfedeee9994f13302fMark Brown if (!has_full_constraints) { 113134abbd68efe09765465b81dfedeee9994f13302fMark Brown pr_warning("%s supply %s not found, using dummy regulator\n", 113234abbd68efe09765465b81dfedeee9994f13302fMark Brown devname, id); 113334abbd68efe09765465b81dfedeee9994f13302fMark Brown rdev = dummy_regulator_rdev; 113434abbd68efe09765465b81dfedeee9994f13302fMark Brown goto found; 113534abbd68efe09765465b81dfedeee9994f13302fMark Brown } 113634abbd68efe09765465b81dfedeee9994f13302fMark Brown#endif 113734abbd68efe09765465b81dfedeee9994f13302fMark Brown 1138414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1139414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1140414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1141414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodfound: 11425ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (rdev->exclusive) { 11435ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown regulator = ERR_PTR(-EPERM); 11445ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown goto out; 11455ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 11465ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11475ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (exclusive && rdev->open_count) { 11485ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown regulator = ERR_PTR(-EBUSY); 11495ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown goto out; 11505ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 11515ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1152a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (!try_module_get(rdev->owner)) 1153a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 1154a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = create_regulator(rdev, dev, id); 1156414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) { 1157414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = ERR_PTR(-ENOMEM); 1158414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 1159414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1160414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 11615ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->open_count++; 11625ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (exclusive) { 11635ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->exclusive = 1; 11645ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11655ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown ret = _regulator_is_enabled(rdev); 11665ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (ret > 0) 11675ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->use_count = 1; 11685ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown else 11695ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->use_count = 0; 11705ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 11715ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1172a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 1173414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 11745ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1175414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1176414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 11775ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11785ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/** 11795ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator_get - lookup and obtain a reference to a regulator. 11805ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @dev: device for regulator "consumer" 11815ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @id: Supply name or regulator ID. 11825ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11835ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Returns a struct regulator corresponding to the regulator producer, 11845ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * or IS_ERR() condition containing errno. 11855ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11865ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Use of supply names configured via regulator_set_device_supply() is 11875ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * strongly encouraged. It is recommended that the supply name used 11885ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * should match the name used for the supply and/or the relevant 11895ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * device pins in the datasheet. 11905ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown */ 11915ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstruct regulator *regulator_get(struct device *dev, const char *id) 11925ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown{ 11935ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown return _regulator_get(dev, id, 0); 11945ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown} 1195414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get); 1196414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1197414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 11985ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator_get_exclusive - obtain exclusive access to a regulator. 11995ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @dev: device for regulator "consumer" 12005ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @id: Supply name or regulator ID. 12015ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 12025ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Returns a struct regulator corresponding to the regulator producer, 12035ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * or IS_ERR() condition containing errno. Other consumers will be 12045ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * unable to obtain this reference is held and the use count for the 12055ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator will be initialised to reflect the current state of the 12065ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator. 12075ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 12085ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * This is intended for use by consumers which cannot tolerate shared 12095ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * use of the regulator such as those which need to force the 12105ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator off for correct operation of the hardware they are 12115ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * controlling. 12125ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 12135ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Use of supply names configured via regulator_set_device_supply() is 12145ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * strongly encouraged. It is recommended that the supply name used 12155ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * should match the name used for the supply and/or the relevant 12165ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * device pins in the datasheet. 12175ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown */ 12185ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstruct regulator *regulator_get_exclusive(struct device *dev, const char *id) 12195ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown{ 12205ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown return _regulator_get(dev, id, 1); 12215ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown} 12225ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark BrownEXPORT_SYMBOL_GPL(regulator_get_exclusive); 12235ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 12245ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/** 1225414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_put - "free" the regulator source 1226414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1227414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1228414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Note: drivers must ensure that all regulator_enable calls made on this 1229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator source are balanced by regulator_disable calls prior to calling 1230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * this function. 1231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_put(struct regulator *regulator) 1233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1234414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1235414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1236414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL || IS_ERR(regulator)) 1237414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 1238414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1239414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1240414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = regulator->rdev; 1241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1242414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* remove any sysfs entries */ 1243414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev) { 1244414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name); 1245414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 1246414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 1247414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 1248414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1249414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 1250414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 1251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 12525ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->open_count--; 12535ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->exclusive = 0; 12545ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1255414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 1256414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1257414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1258414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_put); 1259414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 12609a2372fa7a403ba327873d0208a619d781a8a150Mark Brownstatic int _regulator_can_change_status(struct regulator_dev *rdev) 12619a2372fa7a403ba327873d0208a619d781a8a150Mark Brown{ 12629a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (!rdev->constraints) 12639a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 0; 12649a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 12659a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_STATUS) 12669a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 1; 12679a2372fa7a403ba327873d0208a619d781a8a150Mark Brown else 12689a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 0; 12699a2372fa7a403ba327873d0208a619d781a8a150Mark Brown} 12709a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 1271414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_enable() */ 1272414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_enable(struct regulator_dev *rdev) 1273414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 127431aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown int ret, delay; 1275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 127663cee946148821bca42be10130b061c2d0f5af7eMattias Wallin /* do we need to enable the supply regulator first */ 127763cee946148821bca42be10130b061c2d0f5af7eMattias Wallin if (rdev->supply) { 127863cee946148821bca42be10130b061c2d0f5af7eMattias Wallin mutex_lock(&rdev->supply->mutex); 127963cee946148821bca42be10130b061c2d0f5af7eMattias Wallin ret = _regulator_enable(rdev->supply); 128063cee946148821bca42be10130b061c2d0f5af7eMattias Wallin mutex_unlock(&rdev->supply->mutex); 128163cee946148821bca42be10130b061c2d0f5af7eMattias Wallin if (ret < 0) { 128263cee946148821bca42be10130b061c2d0f5af7eMattias Wallin printk(KERN_ERR "%s: failed to enable %s: %d\n", 128363cee946148821bca42be10130b061c2d0f5af7eMattias Wallin __func__, rdev_get_name(rdev), ret); 128463cee946148821bca42be10130b061c2d0f5af7eMattias Wallin return ret; 1285414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1286414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1287414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1288414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check voltage and requested load before enabling */ 12899a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (rdev->constraints && 12909a2372fa7a403ba327873d0208a619d781a8a150Mark Brown (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) 12919a2372fa7a403ba327873d0208a619d781a8a150Mark Brown drms_uA_update(rdev); 1292414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 12939a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (rdev->use_count == 0) { 12949a2372fa7a403ba327873d0208a619d781a8a150Mark Brown /* The regulator may on if it's not switchable or left on */ 12959a2372fa7a403ba327873d0208a619d781a8a150Mark Brown ret = _regulator_is_enabled(rdev); 12969a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (ret == -EINVAL || ret == 0) { 12979a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (!_regulator_can_change_status(rdev)) 12989a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return -EPERM; 12999a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 130031aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (!rdev->desc->ops->enable) 13019a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return -EINVAL; 130231aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 130331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown /* Query before enabling in case configuration 130431aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown * dependant. */ 130531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown ret = _regulator_get_enable_time(rdev); 130631aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (ret >= 0) { 130731aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown delay = ret; 130831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown } else { 130931aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown printk(KERN_WARNING 131031aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown "%s: enable_time() failed for %s: %d\n", 131131aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown __func__, rdev_get_name(rdev), 131231aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown ret); 131331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown delay = 0; 13149a2372fa7a403ba327873d0208a619d781a8a150Mark Brown } 131531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 131602fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_enable(rdev_get_name(rdev)); 131702fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 131831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown /* Allow the regulator to ramp; it would be useful 131931aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown * to extend this for bulk operations so that the 132031aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown * regulators can ramp together. */ 132131aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown ret = rdev->desc->ops->enable(rdev); 132231aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (ret < 0) 132331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown return ret; 132431aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 132502fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_enable_delay(rdev_get_name(rdev)); 132602fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 1327e36c1df8e18183ba2c691fe766a52c94020cdc5eAxel Lin if (delay >= 1000) { 132831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown mdelay(delay / 1000); 1329e36c1df8e18183ba2c691fe766a52c94020cdc5eAxel Lin udelay(delay % 1000); 1330e36c1df8e18183ba2c691fe766a52c94020cdc5eAxel Lin } else if (delay) { 133131aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown udelay(delay); 1332e36c1df8e18183ba2c691fe766a52c94020cdc5eAxel Lin } 133331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 133402fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_enable_complete(rdev_get_name(rdev)); 133502fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 1336a7433cff9ed8e7982de8e0f210f0325d0f3d1949Linus Walleij } else if (ret < 0) { 13379a2372fa7a403ba327873d0208a619d781a8a150Mark Brown printk(KERN_ERR "%s: is_enabled() failed for %s: %d\n", 13381083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev), ret); 1339414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1340414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1341a7433cff9ed8e7982de8e0f210f0325d0f3d1949Linus Walleij /* Fallthrough on positive return values - already enabled */ 1342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 13449a2372fa7a403ba327873d0208a619d781a8a150Mark Brown rdev->use_count++; 13459a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 13469a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 0; 1347414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1348414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1350414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_enable - enable regulator output 1351414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1352414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1353cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * Request that the regulator be enabled with the regulator output at 1354cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * the predefined voltage or current value. Calls to regulator_enable() 1355cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * must be balanced with calls to regulator_disable(). 1356cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * 1357414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: the output value can be set by other drivers, boot loader or may be 1358cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * hardwired in the regulator. 1359414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1360414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_enable(struct regulator *regulator) 1361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1362412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell struct regulator_dev *rdev = regulator->rdev; 1363412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int ret = 0; 1364414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1365412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_lock(&rdev->mutex); 1366cd94b5053081963614f6ad77b9b66a7968056c84David Brownell ret = _regulator_enable(rdev); 1367412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_unlock(&rdev->mutex); 1368414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1369414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1370414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_enable); 1371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1372414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_disable() */ 13738cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlylestatic int _regulator_disable(struct regulator_dev *rdev, 13748cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev **supply_rdev_ptr) 1375414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1376414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1377b12a1e29af595d05612153bcb85258193bbf9382Mattias Wallin *supply_rdev_ptr = NULL; 1378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1379cd94b5053081963614f6ad77b9b66a7968056c84David Brownell if (WARN(rdev->use_count <= 0, 1380cd94b5053081963614f6ad77b9b66a7968056c84David Brownell "unbalanced disables for %s\n", 13811083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev))) 1382cd94b5053081963614f6ad77b9b66a7968056c84David Brownell return -EIO; 1383cd94b5053081963614f6ad77b9b66a7968056c84David Brownell 1384414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* are we the last user and permitted to disable ? */ 138560ef66fcf40f0e7bc9579981aa16bd8218942a83Mark Brown if (rdev->use_count == 1 && 138660ef66fcf40f0e7bc9579981aa16bd8218942a83Mark Brown (rdev->constraints && !rdev->constraints->always_on)) { 1387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1388414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* we are last user */ 13899a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (_regulator_can_change_status(rdev) && 13909a2372fa7a403ba327873d0208a619d781a8a150Mark Brown rdev->desc->ops->disable) { 139102fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_disable(rdev_get_name(rdev)); 139202fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 1393414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1394414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to disable %s\n", 13961083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 1397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 139984b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown 140002fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_disable_complete(rdev_get_name(rdev)); 140102fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 140284b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE, 140384b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown NULL); 1404414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1405414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1406414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 14078cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle *supply_rdev_ptr = rdev->supply; 1408414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1409414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1410414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } else if (rdev->use_count > 1) { 1411414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1412414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints && 1413414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood (rdev->constraints->valid_ops_mask & 1414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood REGULATOR_CHANGE_DRMS)) 1415414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood drms_uA_update(rdev); 1416414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1417414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count--; 1418414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1420414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1421414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1423414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_disable - disable regulator output 1424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1426cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * Disable the regulator output voltage or current. Calls to 1427cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_enable() must be balanced with calls to 1428cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_disable(). 142969279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * 1430414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this will only disable the regulator output if no other consumer 1431cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * devices have it enabled, the regulator device supports disabling and 1432cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * machine constraints permit this operation. 1433414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1434414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_disable(struct regulator *regulator) 1435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1436412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell struct regulator_dev *rdev = regulator->rdev; 14378cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev *supply_rdev = NULL; 1438412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int ret = 0; 1439414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1440412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_lock(&rdev->mutex); 14418cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle ret = _regulator_disable(rdev, &supply_rdev); 1442412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_unlock(&rdev->mutex); 14438cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 14448cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle /* decrease our supplies ref count and disable if required */ 14458cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle while (supply_rdev != NULL) { 14468cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle rdev = supply_rdev; 14478cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 14488cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle mutex_lock(&rdev->mutex); 14498cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle _regulator_disable(rdev, &supply_rdev); 14508cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle mutex_unlock(&rdev->mutex); 14518cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle } 14528cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 1453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1455414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_disable); 1456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_force_disable() */ 14588cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlylestatic int _regulator_force_disable(struct regulator_dev *rdev, 14598cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev **supply_rdev_ptr) 1460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1462414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* force disable */ 1464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->disable) { 1465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ah well, who wants to live forever... */ 1466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1467414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1468414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to force disable %s\n", 14691083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 1470414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* notify other consumers that power has been forced off */ 147384b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE | 147484b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown REGULATOR_EVENT_DISABLE, NULL); 1475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1476414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 14788cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle *supply_rdev_ptr = rdev->supply; 1479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1481414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1484414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1485414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_force_disable - force disable regulator output 1486414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Forcibly disable the regulator output voltage or current. 1489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this *will* disable the regulator output even if other consumer 1490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * devices have it enabled. This should be used for situations when device 1491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * damage will likely occur if the regulator is not disabled (e.g. over temp). 1492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1493414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_force_disable(struct regulator *regulator) 1494414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 14958cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev *supply_rdev = NULL; 1496414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1497414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = 0; 15008cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle ret = _regulator_force_disable(regulator->rdev, &supply_rdev); 1501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 15028cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 15038cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle if (supply_rdev) 15048cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle regulator_disable(get_device_regulator(rdev_get_dev(supply_rdev))); 15058cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 1506414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1507414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1508414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_force_disable); 1509414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1510414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev) 1511414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 15129a7f6a4c6edc84748c6477c9df56691a0e61b8fdMark Brown /* If we don't know then assume that the regulator is always on */ 15139332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown if (!rdev->desc->ops->is_enabled) 15149a7f6a4c6edc84748c6477c9df56691a0e61b8fdMark Brown return 1; 1515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 15169332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown return rdev->desc->ops->is_enabled(rdev); 1517414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1519414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1520414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_is_enabled - is the regulator output enabled 1521414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1522414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1523412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * Returns positive if the regulator driver backing the source/client 1524412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * has requested that the device be enabled, zero if it hasn't, else a 1525412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * negative errno code. 1526412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * 1527412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * Note that the device backing this regulator handle can have multiple 1528412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * users, so it might be enabled even if regulator_enable() was never 1529412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * called for this particular source. 1530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_is_enabled(struct regulator *regulator) 1532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 15339332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown int ret; 15349332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown 15359332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_lock(®ulator->rdev->mutex); 15369332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown ret = _regulator_is_enabled(regulator->rdev); 15379332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_unlock(®ulator->rdev->mutex); 15389332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown 15399332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown return ret; 1540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1541414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_is_enabled); 1542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 15444367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * regulator_count_voltages - count regulator_list_voltage() selectors 15454367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @regulator: regulator source 15464367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * 15474367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Returns number of selectors, or negative errno. Selectors are 15484367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * numbered starting at zero, and typically correspond to bitfields 15494367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * in hardware registers. 15504367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 15514367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownellint regulator_count_voltages(struct regulator *regulator) 15524367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell{ 15534367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_dev *rdev = regulator->rdev; 15544367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15554367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return rdev->desc->n_voltages ? : -EINVAL; 15564367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell} 15574367cfdc7c657ad8a797f51b9ffd3c64b31910e7David BrownellEXPORT_SYMBOL_GPL(regulator_count_voltages); 15584367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15594367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell/** 15604367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * regulator_list_voltage - enumerate supported voltages 15614367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @regulator: regulator source 15624367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @selector: identify voltage to list 15634367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Context: can sleep 15644367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * 15654367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Returns a voltage that can be passed to @regulator_set_voltage(), 156688393161210493e317ae391696ee8ef463cb3c23Thomas Weber * zero if this selector code can't be used on this system, or a 15674367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * negative errno. 15684367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 15694367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownellint regulator_list_voltage(struct regulator *regulator, unsigned selector) 15704367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell{ 15714367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_dev *rdev = regulator->rdev; 15724367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_ops *ops = rdev->desc->ops; 15734367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int ret; 15744367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15754367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (!ops->list_voltage || selector >= rdev->desc->n_voltages) 15764367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return -EINVAL; 15774367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15784367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell mutex_lock(&rdev->mutex); 15794367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = ops->list_voltage(rdev, selector); 15804367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell mutex_unlock(&rdev->mutex); 15814367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15824367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ret > 0) { 15834367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ret < rdev->constraints->min_uV) 15844367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = 0; 15854367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell else if (ret > rdev->constraints->max_uV) 15864367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = 0; 15874367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 15884367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15894367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return ret; 15904367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell} 15914367cfdc7c657ad8a797f51b9ffd3c64b31910e7David BrownellEXPORT_SYMBOL_GPL(regulator_list_voltage); 15924367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15934367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell/** 1594a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * regulator_is_supported_voltage - check if a voltage range can be supported 1595a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * 1596a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @regulator: Regulator to check. 1597a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @min_uV: Minimum required voltage in uV. 1598a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @max_uV: Maximum required voltage in uV. 1599a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * 1600a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * Returns a boolean or a negative error code. 1601a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown */ 1602a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brownint regulator_is_supported_voltage(struct regulator *regulator, 1603a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown int min_uV, int max_uV) 1604a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown{ 1605a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown int i, voltages, ret; 1606a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1607a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown ret = regulator_count_voltages(regulator); 1608a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown if (ret < 0) 1609a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return ret; 1610a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown voltages = ret; 1611a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1612a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown for (i = 0; i < voltages; i++) { 1613a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown ret = regulator_list_voltage(regulator, i); 1614a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1615a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown if (ret >= min_uV && ret <= max_uV) 1616a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return 1; 1617a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown } 1618a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1619a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return 0; 1620a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown} 1621a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1622a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown/** 1623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_voltage - set regulator output voltage 1624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uV: Minimum required voltage in uV 1626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uV: Maximum acceptable voltage in uV 1627414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets a voltage regulator to the desired output voltage. This can be set 1629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * during any regulator state. IOW, regulator can be disabled or enabled. 1630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the voltage will change to the new value 1632414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new voltage when enabled. 1634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is shared between several devices then the lowest 1636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * request voltage that meets the system constraints will be used. 163769279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * Regulator system constraints must be set for this regulator before 1638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) 1641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 16443a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown unsigned selector; 1645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_voltage) { 1650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_voltage(rdev, &min_uV, &max_uV); 1656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->min_uV = min_uV; 1659414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->max_uV = max_uV; 16603a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown 166102fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_set_voltage(rdev_get_name(rdev), min_uV, max_uV); 166202fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 16633a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV, &selector); 16643a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown 16653a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown if (rdev->desc->ops->list_voltage) 16663a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown selector = rdev->desc->ops->list_voltage(rdev, selector); 16673a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown else 16683a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown selector = -1; 1669414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 167002fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_set_voltage_complete(rdev_get_name(rdev), selector); 167102fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 1672414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1673b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, NULL); 1674414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1675414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1676414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1677414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_voltage); 1678414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1679414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev) 1680414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1681414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1682414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->get_voltage) 1683414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->ops->get_voltage(rdev); 1684414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1685414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 1686414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1687414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1688414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1689414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_voltage - get regulator output voltage 1690414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1691414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1692414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current regulator voltage in uV. 1693414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1694414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the voltage value. This 1695414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1696414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1697414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_voltage(struct regulator *regulator) 1698414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1699414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1700414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1701414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1702414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1703414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_get_voltage(regulator->rdev); 1704414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1705414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1706414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1707414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1708414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1709414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_voltage); 1710414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1711414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1712414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_current_limit - set regulator output current limit 1713414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1714414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uA: Minimuum supported current in uA 1715414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uA: Maximum supported current in uA 1716414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1717414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets current sink to the desired output current. This can be set during 1718414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * any regulator state. IOW, regulator can be disabled or enabled. 1719414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1720414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the current will change to the new value 1721414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1722414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new current when enabled. 1723414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1724414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1725414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1726414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1727414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_current_limit(struct regulator *regulator, 1728414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uA, int max_uA) 1729414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1730414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1731414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1732414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1733414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1734414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1735414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1736414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_current_limit) { 1737414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1738414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1739414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1740414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1741414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1742414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_current_limit(rdev, &min_uA, &max_uA); 1743414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1744414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1745414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1746414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA); 1747414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1748414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1749414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1750414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1751414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_current_limit); 1752414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1753414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev) 1754414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1755414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1756414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1757414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1758414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1759414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1760414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_current_limit) { 1761414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1762414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1763414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1764414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1765414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_current_limit(rdev); 1766414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1767414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1768414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1769414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1770414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1771414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1772414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_current_limit - get regulator output current 1773414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1774414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1775414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current supplied by the specified current sink in uA. 1776414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1777414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the current value. This 1778414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1779414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1780414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_current_limit(struct regulator *regulator) 1781414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1782414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_current_limit(regulator->rdev); 1783414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1784414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_current_limit); 1785414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1786414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1787414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_mode - set regulator operating mode 1788414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1789414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @mode: operating mode - one of the REGULATOR_MODE constants 1790414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1791414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Set regulator operating mode to increase regulator efficiency or improve 1792414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulation performance. 1793414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1794414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1795414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1796414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1797414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_mode(struct regulator *regulator, unsigned int mode) 1798414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1799414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1800414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1801500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer int regulator_curr_mode; 1802414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1803414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1804414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1805414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1806414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_mode) { 1807414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1808414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1809414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1810414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1811500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer /* return if the same mode is requested */ 1812500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer if (rdev->desc->ops->get_mode) { 1813500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer regulator_curr_mode = rdev->desc->ops->get_mode(rdev); 1814500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer if (regulator_curr_mode == mode) { 1815500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer ret = 0; 1816500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer goto out; 1817500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer } 1818500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer } 1819500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer 1820414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1821414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_mode(rdev, mode); 1822414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1823414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1824414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1825414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1826414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1827414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1828414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1829414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1830414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_mode); 1831414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1832414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev) 1833414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1834414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1835414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1836414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1837414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1838414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1839414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_mode) { 1840414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1841414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1842414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1843414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1844414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_mode(rdev); 1845414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1846414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1847414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1848414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1849414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1850414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1851414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_mode - get regulator operating mode 1852414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1853414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1854414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get the current regulator operating mode. 1855414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1856414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodunsigned int regulator_get_mode(struct regulator *regulator) 1857414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1858414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_mode(regulator->rdev); 1859414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1860414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_mode); 1861414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1862414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1863414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_optimum_mode - set regulator optimum operating mode 1864414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1865414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @uA_load: load current 1866414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1867414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Notifies the regulator core of a new device load. This is then used by 1868414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS (if enabled by constraints) to set the most efficient regulator 1869414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * operating mode for the new regulator loading. 1870414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1871414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Consumer devices notify their supply regulator of the maximum power 1872414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * they will require (can be taken from device datasheet in the power 1873414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption tables) when they change operational status and hence power 1874414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * state. Examples of operational state changes that can affect power 1875414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption are :- 1876414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1877414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is opened / closed. 1878414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device I/O is about to begin or has just finished. 1879414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is idling in between work. 1880414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1881414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This information is also exported via sysfs to userspace. 1882414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1883414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS will sum the total requested load on the regulator and change 1884414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * to the most efficient operating mode if platform constraints allow. 1885414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1886414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns the new regulator mode or error. 1887414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1888414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_optimum_mode(struct regulator *regulator, int uA_load) 1889414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1890414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1891414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *consumer; 1892414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret, output_uV, input_uV, total_uA_load = 0; 1893414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 1894414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1895414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1896414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1897414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = uA_load; 1898414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_drms(rdev); 1899414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1900414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1901414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1902414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1903414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1904414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_optimum_mode) 1905414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1906414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1907414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 1908414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 1909414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) { 1910414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid output voltage found for %s\n", 19111083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 1912414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1913414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1914414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1915414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 1916414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 1917414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 1918414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1919414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 1920414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) { 1921414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid input voltage found for %s\n", 19221083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 1923414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1924414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1925414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1926414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load for this regulator */ 1927414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(consumer, &rdev->consumer_list, list) 1928fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese total_uA_load += consumer->uA_load; 1929414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1930414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, 1931414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV, output_uV, 1932414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load); 1933e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell ret = regulator_check_mode(rdev, mode); 1934e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell if (ret < 0) { 1935414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to get optimum mode for %s @" 19361083c39346d482b9001944d05c09191027892226Mark Brown " %d uA %d -> %d uV\n", __func__, rdev_get_name(rdev), 1937414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load, input_uV, output_uV); 1938414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1939414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1940414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1941414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1942e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell if (ret < 0) { 1943414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set optimum mode %x for %s\n", 19441083c39346d482b9001944d05c09191027892226Mark Brown __func__, mode, rdev_get_name(rdev)); 1945414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1946414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1947414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = mode; 1948414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1949414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1950414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1951414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1952414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_optimum_mode); 1953414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1954414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1955414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register_notifier - register regulator event notifier 1956414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 195769279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @nb: notifier block 1958414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1959414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Register notifier block to receive regulator events. 1960414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1961414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_register_notifier(struct regulator *regulator, 1962414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1963414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1964414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_register(®ulator->rdev->notifier, 1965414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1966414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1967414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register_notifier); 1968414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1969414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1970414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister_notifier - unregister regulator event notifier 1971414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 197269279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @nb: notifier block 1973414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1974414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Unregister regulator event notifier block. 1975414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1976414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_unregister_notifier(struct regulator *regulator, 1977414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1978414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1979414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_unregister(®ulator->rdev->notifier, 1980414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1981414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1982414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister_notifier); 1983414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1984b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron/* notify regulator consumers and downstream regulator consumers. 1985b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron * Note mutex must be held by caller. 1986b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron */ 1987414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 1988414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 1989414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1990414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *_rdev; 1991414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1992414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* call rdev chain first */ 1993414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood blocking_notifier_call_chain(&rdev->notifier, event, NULL); 1994414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1995414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now notify regulator we supply */ 1996b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron list_for_each_entry(_rdev, &rdev->supply_list, slist) { 1997fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese mutex_lock(&_rdev->mutex); 1998fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese _notifier_call_chain(_rdev, event, data); 1999fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese mutex_unlock(&_rdev->mutex); 2000b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron } 2001414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2002414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2003414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2004414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_get - get multiple regulator consumers 2005414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2006414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @dev: Device to supply 2007414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers to register 2008414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Configuration of consumers; clients are stored here. 2009414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2010414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure. 2011414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2012414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This helper function allows drivers to get several regulator 2013414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumers in one operation. If any of the regulators cannot be 2014414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * acquired then any regulators that were allocated will be freed 2015414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * before returning to the caller. 2016414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2017414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_get(struct device *dev, int num_consumers, 2018414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2019414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2020414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2021414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 2022414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2023414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 2024414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 2025414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2026414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2027414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = regulator_get(dev, 2028414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].supply); 2029414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (IS_ERR(consumers[i].consumer)) { 2030414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = PTR_ERR(consumers[i].consumer); 20315b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown dev_err(dev, "Failed to get supply '%s': %d\n", 20325b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown consumers[i].supply, ret); 2033414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 2034414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 2035414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2036414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2037414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2038414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 2039414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2040414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 2041414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers && consumers[i].consumer; i++) 2042414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 2043414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2044414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2045414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2046414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_get); 2047414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2048414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2049414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_enable - enable multiple regulator consumers 2050414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2051414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 2052414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 2053414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 2054414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2055414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to enable multiple regulator 2056414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 2057414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were enabled will be disabled again prior to 2058414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 2059414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2060414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_enable(int num_consumers, 2061414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2062414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2063414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2064414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 2065414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2066414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2067414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_enable(consumers[i].consumer); 2068414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 2069414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 2070414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2071414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2072414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 2073414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2074414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 20755b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown printk(KERN_ERR "Failed to enable %s: %d\n", consumers[i].supply, ret); 2076eb143ac1b9f56ca9c6dc782d795acda1f60c5fd2Lars-Peter Clausen for (--i; i >= 0; --i) 2077414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_disable(consumers[i].consumer); 2078414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2079414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2080414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2081414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_enable); 2082414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2083414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2084414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_disable - disable multiple regulator consumers 2085414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2086414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 2087414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 2088414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 2089414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2090414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to disable multiple regulator 2091414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 2092414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were disabled will be disabled again prior to 2093414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 2094414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2095414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_disable(int num_consumers, 2096414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2097414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2098414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2099414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 2100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2101414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_disable(consumers[i].consumer); 2103414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 2104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 2105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2106414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2107414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 2108414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 21105b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown printk(KERN_ERR "Failed to disable %s: %d\n", consumers[i].supply, 21115b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown ret); 2112eb143ac1b9f56ca9c6dc782d795acda1f60c5fd2Lars-Peter Clausen for (--i; i >= 0; --i) 2113414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_enable(consumers[i].consumer); 2114414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2115414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2116414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2117414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_disable); 2118414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2119414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2120414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_free - free multiple regulator consumers 2121414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2122414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 2123414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 2124414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to free multiple regulator 2126414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. 2127414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2128414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_bulk_free(int num_consumers, 2129414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2130414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2131414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2132414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2133414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2134414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 2135414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 2136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2137414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2138414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_free); 2139414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2140414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2141414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_notifier_call_chain - call regulator event notifier 214269279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator source 2143414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @event: notifier block 214469279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @data: callback-specific data. 2145414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2146414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to notify clients a regulator event has 2147414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * occurred. We also notify regulator clients downstream. 2148b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron * Note lock must be held by caller. 2149414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2150414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_notifier_call_chain(struct regulator_dev *rdev, 2151414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 2152414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2153414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(rdev, event, data); 2154414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NOTIFY_DONE; 2155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2156414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2157414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_notifier_call_chain); 2158414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2159be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown/** 2160be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * regulator_mode_to_status - convert a regulator mode into a status 2161be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * 2162be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * @mode: Mode to convert 2163be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * 2164be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * Convert a regulator mode into a status. 2165be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown */ 2166be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brownint regulator_mode_to_status(unsigned int mode) 2167be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown{ 2168be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown switch (mode) { 2169be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_FAST: 2170be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_FAST; 2171be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_NORMAL: 2172be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_NORMAL; 2173be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_IDLE: 2174be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_IDLE; 2175be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_STATUS_STANDBY: 2176be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_STANDBY; 2177be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown default: 2178be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return 0; 2179be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown } 2180be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown} 2181be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark BrownEXPORT_SYMBOL_GPL(regulator_mode_to_status); 2182be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown 21837ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell/* 21847ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * To avoid cluttering sysfs (and memory) with useless state, only 21857ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * create attributes that can be meaningfully displayed. 21867ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 21877ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic int add_regulator_attributes(struct regulator_dev *rdev) 21887ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell{ 21897ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell struct device *dev = &rdev->dev; 21907ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell struct regulator_ops *ops = rdev->desc->ops; 21917ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell int status = 0; 21927ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 21937ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* some attributes need specific methods to be displayed */ 21947ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_voltage) { 21957ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_microvolts); 21967ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21977ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21987ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 21997ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_current_limit) { 22007ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_microamps); 22017ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22027ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22037ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22047ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_mode) { 22057ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_opmode); 22067ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22077ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22087ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22097ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->is_enabled) { 22107ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_state); 22117ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22127ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22137ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 2214853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (ops->get_status) { 2215853116a10544206b6b2cf42ebc9d78fba2668888David Brownell status = device_create_file(dev, &dev_attr_status); 2216853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (status < 0) 2217853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return status; 2218853116a10544206b6b2cf42ebc9d78fba2668888David Brownell } 22197ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22207ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* some attributes are type-specific */ 22217ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (rdev->desc->type == REGULATOR_CURRENT) { 22227ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_requested_microamps); 22237ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22247ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22257ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22267ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22277ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* all the other attributes exist to support constraints; 22287ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * don't show them if there are no constraints, or if the 22297ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * relevant supporting methods are missing. 22307ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 22317ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (!rdev->constraints) 22327ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22337ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22347ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* constraints need specific supporting methods */ 22357ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_voltage) { 22367ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_min_microvolts); 22377ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22387ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22397ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_max_microvolts); 22407ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22417ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22427ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22437ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_current_limit) { 22447ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_min_microamps); 22457ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22467ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22477ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_max_microamps); 22487ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22497ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22507ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22517ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22527ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* suspend mode constraints need multiple supporting methods */ 22537ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (!(ops->set_suspend_enable && ops->set_suspend_disable)) 22547ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22557ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22567ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_standby_state); 22577ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22587ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22597ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_mem_state); 22607ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22617ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22627ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_disk_state); 22637ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22647ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22657ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22667ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_suspend_voltage) { 22677ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22687ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_standby_microvolts); 22697ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22707ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22717ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22727ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_mem_microvolts); 22737ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22747ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22757ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22767ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_disk_microvolts); 22777ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22787ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22797ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22807ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22817ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_suspend_mode) { 22827ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22837ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_standby_mode); 22847ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22857ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22867ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22877ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_mem_mode); 22887ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22897ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22907ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22917ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_disk_mode); 22927ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22937ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22947ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22957ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22967ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22977ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell} 22987ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 2299414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2300414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register - register regulator 230169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @regulator_desc: regulator to register 230269279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @dev: struct device for the regulator 23030527100fd11d9710c7e153d791da78824b7b46faMark Brown * @init_data: platform provided init data, passed through by driver 230469279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @driver_data: private regulator data 2305414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2306414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to register a regulator. 2307414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns 0 on success. 2308414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2309414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, 23100527100fd11d9710c7e153d791da78824b7b46faMark Brown struct device *dev, struct regulator_init_data *init_data, 23110527100fd11d9710c7e153d791da78824b7b46faMark Brown void *driver_data) 2312414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2313414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood static atomic_t regulator_no = ATOMIC_INIT(0); 2314414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 2315a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int ret, i; 2316414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2317414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc == NULL) 2318414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2319414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2320414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc->name == NULL || regulator_desc->ops == NULL) 2321414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2322414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2323cd78dfc6c6e321a310a73ef7b0df3d262704dd55Diego Liziero if (regulator_desc->type != REGULATOR_VOLTAGE && 2324cd78dfc6c6e321a310a73ef7b0df3d262704dd55Diego Liziero regulator_desc->type != REGULATOR_CURRENT) 2325414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2326414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 232746fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown if (!init_data) 232846fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown return ERR_PTR(-EINVAL); 232946fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown 2330414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); 2331414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 2332414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-ENOMEM); 2333414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2334414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 2335414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2336414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_init(&rdev->mutex); 2337a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->reg_data = driver_data; 2338414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->owner = regulator_desc->owner; 2339414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc = regulator_desc; 2340414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->consumer_list); 2341414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->supply_list); 2342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->list); 2343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->slist); 2344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier); 2345414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2346a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* preform any regulator specific init */ 2347a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->regulator_init) { 2348a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = init_data->regulator_init(rdev->reg_data); 23494fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 23504fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 2351a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 2352a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2353a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* register with sysfs */ 2354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->dev.class = ®ulator_class; 2355a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->dev.parent = dev; 2356812460a927c1d0dc1fbdbec9aa07de1b04043d83Kay Sievers dev_set_name(&rdev->dev, "regulator.%d", 2357812460a927c1d0dc1fbdbec9aa07de1b04043d83Kay Sievers atomic_inc_return(®ulator_no) - 1); 2358a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = device_register(&rdev->dev); 2359ad7725cb43b8badb2fec2c2bfca07c067f2e19a7Vasiliy Kulikov if (ret != 0) { 2360ad7725cb43b8badb2fec2c2bfca07c067f2e19a7Vasiliy Kulikov put_device(&rdev->dev); 23614fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 2362ad7725cb43b8badb2fec2c2bfca07c067f2e19a7Vasiliy Kulikov } 2363a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2364a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_set_drvdata(&rdev->dev, rdev); 2365a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 236674f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport /* set regulator constraints */ 236774f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport ret = set_machine_constraints(rdev, &init_data->constraints); 236874f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport if (ret < 0) 236974f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport goto scrub; 237074f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport 23717ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* add attributes supported by this regulator */ 23727ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell ret = add_regulator_attributes(rdev); 23737ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ret < 0) 23747ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell goto scrub; 23757ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 2376a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* set supply regulator if it exists */ 23770178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (init_data->supply_regulator && init_data->supply_regulator_dev) { 23780178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown dev_err(dev, 23790178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown "Supply regulator specified by both name and dev\n"); 23807727da22e820a96ab394db2fc0ab58f7f7ecb323Axel Lin ret = -EINVAL; 23810178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown goto scrub; 23820178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23830178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 23840178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (init_data->supply_regulator) { 23850178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown struct regulator_dev *r; 23860178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown int found = 0; 23870178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 23880178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown list_for_each_entry(r, ®ulator_list, list) { 23890178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (strcmp(rdev_get_name(r), 23900178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown init_data->supply_regulator) == 0) { 23910178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown found = 1; 23920178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown break; 23930178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23940178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23950178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 23960178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (!found) { 23970178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown dev_err(dev, "Failed to find supply %s\n", 23980178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown init_data->supply_regulator); 23997727da22e820a96ab394db2fc0ab58f7f7ecb323Axel Lin ret = -ENODEV; 24000178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown goto scrub; 24010178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 24020178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 24030178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown ret = set_supply(rdev, r); 24040178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (ret < 0) 24050178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown goto scrub; 24060178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 24070178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 2408a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->supply_regulator_dev) { 24090178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown dev_warn(dev, "Uses supply_regulator_dev instead of regulator_supply\n"); 2410a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_supply(rdev, 2411a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_get_drvdata(init_data->supply_regulator_dev)); 24124fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 24134fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto scrub; 2414a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 2415a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2416a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* add consumers devices */ 2417a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood for (i = 0; i < init_data->num_consumer_supplies; i++) { 2418a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_consumer_device_supply(rdev, 2419a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].dev, 242040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown init_data->consumer_supplies[i].dev_name, 2421a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].supply); 2422d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula if (ret < 0) 2423d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula goto unset_supplies; 2424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2425a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2426a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->list, ®ulator_list); 2427a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 2428414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2429414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev; 24304fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 2431d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikulaunset_supplies: 2432d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula unset_regulator_supplies(rdev); 2433d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula 24344fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellscrub: 24354fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell device_unregister(&rdev->dev); 243653032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley /* device core frees rdev */ 243753032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley rdev = ERR_PTR(ret); 243853032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley goto out; 243953032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley 24404fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellclean: 24414fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell kfree(rdev); 24424fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev = ERR_PTR(ret); 24434fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto out; 2444414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2445414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register); 2446414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2448414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister - unregister regulator 244969279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator to unregister 2450414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to unregister a regulator. 2452414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_unregister(struct regulator_dev *rdev) 2454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 2456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 2457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 24596bf87d17c9f5b855e9dde7b3d6f726385b966814Mark Brown WARN_ON(rdev->open_count); 24600f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport unset_regulator_supplies(rdev); 2461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(&rdev->list); 2462414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 2463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, "supply"); 2464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_unregister(&rdev->dev); 2465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2467414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister); 2468414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2470cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_suspend_prepare - prepare regulators for system wide suspend 2471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @state: system suspend state 2472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2473414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Configure each regulator with it's suspend operating parameters for state. 2474414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This will usually be called by machine suspend code prior to supending. 2475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2476414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_suspend_prepare(suspend_state_t state) 2477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2478414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 2479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 2480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2481414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ON is handled by regulator active state */ 2482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state == PM_SUSPEND_ON) 2483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 2484414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2485414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 2486414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 2487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 2489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = suspend_prepare(rdev, state); 2490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 2491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 2493414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to prepare %s\n", 24941083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 2495414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 2496414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2497414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 2499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2500414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2502414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_suspend_prepare); 2503414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2504414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2505ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * regulator_has_full_constraints - the system has fully specified constraints 2506ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * 2507ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * Calling this function will cause the regulator API to disable all 2508ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * regulators which have a zero use count and don't have an always_on 2509ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * constraint in a late_initcall. 2510ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * 2511ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * The intention is that this will become the default behaviour in a 2512ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * future kernel release so users are encouraged to use this facility 2513ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * now. 2514ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2515ca7255614e0861e36480103f4a402a115803d7b5Mark Brownvoid regulator_has_full_constraints(void) 2516ca7255614e0861e36480103f4a402a115803d7b5Mark Brown{ 2517ca7255614e0861e36480103f4a402a115803d7b5Mark Brown has_full_constraints = 1; 2518ca7255614e0861e36480103f4a402a115803d7b5Mark Brown} 2519ca7255614e0861e36480103f4a402a115803d7b5Mark BrownEXPORT_SYMBOL_GPL(regulator_has_full_constraints); 2520ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2521ca7255614e0861e36480103f4a402a115803d7b5Mark Brown/** 2522688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * regulator_use_dummy_regulator - Provide a dummy regulator when none is found 2523688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * 2524688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * Calling this function will cause the regulator API to provide a 2525688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * dummy regulator to consumers if no physical regulator is found, 2526688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * allowing most consumers to proceed as though a regulator were 2527688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * configured. This allows systems such as those with software 2528688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * controllable regulators for the CPU core only to be brought up more 2529688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * readily. 2530688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown */ 2531688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brownvoid regulator_use_dummy_regulator(void) 2532688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown{ 2533688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown board_wants_dummy_regulator = true; 2534688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown} 2535688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark BrownEXPORT_SYMBOL_GPL(regulator_use_dummy_regulator); 2536688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown 2537688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown/** 2538414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * rdev_get_drvdata - get rdev regulator driver data 253969279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator 2540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get rdev regulator driver private data. This call can be used in the 2542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator driver context. 2543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2544414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *rdev_get_drvdata(struct regulator_dev *rdev) 2545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->reg_data; 2547414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2548414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_drvdata); 2549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2550414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_drvdata - get regulator driver data 2552414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 2553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get regulator driver private data. This call can be used in the consumer 2555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * driver context when non API regulator specific functions need to be called. 2556414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2557414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *regulator_get_drvdata(struct regulator *regulator) 2558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2559414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator->rdev->reg_data; 2560414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2561414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_drvdata); 2562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_drvdata - set regulator driver data 2565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 2566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @data: data 2567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_set_drvdata(struct regulator *regulator, void *data) 2569414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2570414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev->reg_data = data; 2571414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2572414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_drvdata); 2573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2574414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_id - get regulator ID 257669279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator 2577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint rdev_get_id(struct regulator_dev *rdev) 2579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2580414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->id; 2581414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2582414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_id); 2583414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2584a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstruct device *rdev_get_dev(struct regulator_dev *rdev) 2585a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 2586a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return &rdev->dev; 2587a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 2588a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_dev); 2589a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2590a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodvoid *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) 2591a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 2592a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return reg_init_data->driver_data; 2593a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 2594a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_init_drvdata); 2595a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2596414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int __init regulator_init(void) 2597414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 259834abbd68efe09765465b81dfedeee9994f13302fMark Brown int ret; 259934abbd68efe09765465b81dfedeee9994f13302fMark Brown 2600414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_INFO "regulator: core version %s\n", REGULATOR_VERSION); 260134abbd68efe09765465b81dfedeee9994f13302fMark Brown 260234abbd68efe09765465b81dfedeee9994f13302fMark Brown ret = class_register(®ulator_class); 260334abbd68efe09765465b81dfedeee9994f13302fMark Brown 260434abbd68efe09765465b81dfedeee9994f13302fMark Brown regulator_dummy_init(); 260534abbd68efe09765465b81dfedeee9994f13302fMark Brown 260634abbd68efe09765465b81dfedeee9994f13302fMark Brown return ret; 2607414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2608414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2609414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* init early to allow our consumers to complete system booting */ 2610414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodcore_initcall(regulator_init); 2611ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2612ca7255614e0861e36480103f4a402a115803d7b5Mark Brownstatic int __init regulator_init_complete(void) 2613ca7255614e0861e36480103f4a402a115803d7b5Mark Brown{ 2614ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulator_dev *rdev; 2615ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulator_ops *ops; 2616ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulation_constraints *c; 2617ca7255614e0861e36480103f4a402a115803d7b5Mark Brown int enabled, ret; 2618ca7255614e0861e36480103f4a402a115803d7b5Mark Brown const char *name; 2619ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2620ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_lock(®ulator_list_mutex); 2621ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2622ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* If we have a full configuration then disable any regulators 2623ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * which are not in use or always_on. This will become the 2624ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * default behaviour in the future. 2625ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2626ca7255614e0861e36480103f4a402a115803d7b5Mark Brown list_for_each_entry(rdev, ®ulator_list, list) { 2627ca7255614e0861e36480103f4a402a115803d7b5Mark Brown ops = rdev->desc->ops; 2628ca7255614e0861e36480103f4a402a115803d7b5Mark Brown c = rdev->constraints; 2629ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 26301083c39346d482b9001944d05c09191027892226Mark Brown name = rdev_get_name(rdev); 2631ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2632f25e0b4fcc38d120e704c377791158c4b2a54daaMark Brown if (!ops->disable || (c && c->always_on)) 2633ca7255614e0861e36480103f4a402a115803d7b5Mark Brown continue; 2634ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2635ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_lock(&rdev->mutex); 2636ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2637ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (rdev->use_count) 2638ca7255614e0861e36480103f4a402a115803d7b5Mark Brown goto unlock; 2639ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2640ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* If we can't read the status assume it's on. */ 2641ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (ops->is_enabled) 2642ca7255614e0861e36480103f4a402a115803d7b5Mark Brown enabled = ops->is_enabled(rdev); 2643ca7255614e0861e36480103f4a402a115803d7b5Mark Brown else 2644ca7255614e0861e36480103f4a402a115803d7b5Mark Brown enabled = 1; 2645ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2646ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (!enabled) 2647ca7255614e0861e36480103f4a402a115803d7b5Mark Brown goto unlock; 2648ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2649ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (has_full_constraints) { 2650ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* We log since this may kill the system if it 2651ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * goes wrong. */ 2652ca7255614e0861e36480103f4a402a115803d7b5Mark Brown printk(KERN_INFO "%s: disabling %s\n", 2653ca7255614e0861e36480103f4a402a115803d7b5Mark Brown __func__, name); 2654ca7255614e0861e36480103f4a402a115803d7b5Mark Brown ret = ops->disable(rdev); 2655ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (ret != 0) { 2656ca7255614e0861e36480103f4a402a115803d7b5Mark Brown printk(KERN_ERR 2657ca7255614e0861e36480103f4a402a115803d7b5Mark Brown "%s: couldn't disable %s: %d\n", 2658ca7255614e0861e36480103f4a402a115803d7b5Mark Brown __func__, name, ret); 2659ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2660ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } else { 2661ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* The intention is that in future we will 2662ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * assume that full constraints are provided 2663ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * so warn even if we aren't going to do 2664ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * anything here. 2665ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2666ca7255614e0861e36480103f4a402a115803d7b5Mark Brown printk(KERN_WARNING 2667ca7255614e0861e36480103f4a402a115803d7b5Mark Brown "%s: incomplete constraints, leaving %s on\n", 2668ca7255614e0861e36480103f4a402a115803d7b5Mark Brown __func__, name); 2669ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2670ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2671ca7255614e0861e36480103f4a402a115803d7b5Mark Brownunlock: 2672ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_unlock(&rdev->mutex); 2673ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2674ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2675ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_unlock(®ulator_list_mutex); 2676ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2677ca7255614e0861e36480103f4a402a115803d7b5Mark Brown return 0; 2678ca7255614e0861e36480103f4a402a115803d7b5Mark Brown} 2679ca7255614e0861e36480103f4a402a115803d7b5Mark Brownlate_initcall(regulator_init_complete); 2680