core.c revision b12a1e29af595d05612153bcb85258193bbf9382
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 2834abbd68efe09765465b81dfedeee9994f13302fMark Brown#include "dummy.h" 2934abbd68efe09765465b81dfedeee9994f13302fMark Brown 30414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#define REGULATOR_VERSION "0.5" 31414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 32414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic DEFINE_MUTEX(regulator_list_mutex); 33414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic LIST_HEAD(regulator_list); 34414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic LIST_HEAD(regulator_map_list); 35ca7255614e0861e36480103f4a402a115803d7b5Mark Brownstatic int has_full_constraints; 36688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brownstatic bool board_wants_dummy_regulator; 37414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 388dc5390d4f3fd8acc73773a56fea13544e7924dcMark Brown/* 39414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator_map 40414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 41414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Used to provide symbolic supply names to devices. 42414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 43414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_map { 44414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; 4540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *dev_name; /* The dev_name() for the consumer */ 46414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply; 47a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *regulator; 48414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 49414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 50414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* 51414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator 52414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 53414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * One for each consumer device. 54414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 55414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator { 56414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev; 57414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; 58414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA_load; 59414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uV; 60414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int max_uV; 61414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char *supply_name; 62414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute dev_attr; 63414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 64414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 65414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 66414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev); 678cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlylestatic int _regulator_disable(struct regulator_dev *rdev, 688cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev **supply_rdev_ptr); 69414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev); 70414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev); 71414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev); 72414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 73414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data); 74414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 751083c39346d482b9001944d05c09191027892226Mark Brownstatic const char *rdev_get_name(struct regulator_dev *rdev) 761083c39346d482b9001944d05c09191027892226Mark Brown{ 771083c39346d482b9001944d05c09191027892226Mark Brown if (rdev->constraints && rdev->constraints->name) 781083c39346d482b9001944d05c09191027892226Mark Brown return rdev->constraints->name; 791083c39346d482b9001944d05c09191027892226Mark Brown else if (rdev->desc->name) 801083c39346d482b9001944d05c09191027892226Mark Brown return rdev->desc->name; 811083c39346d482b9001944d05c09191027892226Mark Brown else 821083c39346d482b9001944d05c09191027892226Mark Brown return ""; 831083c39346d482b9001944d05c09191027892226Mark Brown} 841083c39346d482b9001944d05c09191027892226Mark Brown 85414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* gets the regulator for a given consumer device */ 86414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *get_device_regulator(struct device *dev) 87414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 88414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = NULL; 89414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 90414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 91414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 92414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 93414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 94414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) { 95414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev == dev) { 96414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 97414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 98414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 99414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 101414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 103414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 106414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 107414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Platform voltage constraint check */ 108414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_voltage(struct regulator_dev *rdev, 109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int *min_uV, int *max_uV) 110414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 111414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BUG_ON(*min_uV > *max_uV); 112414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 113414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 114414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 1151083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev)); 116414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 117414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 118414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) { 119414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 1201083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 121414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 122414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 123414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 124414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*max_uV > rdev->constraints->max_uV) 125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *max_uV = rdev->constraints->max_uV; 126414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uV < rdev->constraints->min_uV) 127414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *min_uV = rdev->constraints->min_uV; 128414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 129414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uV > *max_uV) 130414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 131414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 132414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 133414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 134414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 135414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* current constraint check */ 136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_current_limit(struct regulator_dev *rdev, 137414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int *min_uA, int *max_uA) 138414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 139414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BUG_ON(*min_uA > *max_uA); 140414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 141414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 142414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 1431083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev)); 144414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 145414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 146414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_CURRENT)) { 147414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 1481083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 149414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 150414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 151414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 152414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*max_uA > rdev->constraints->max_uA) 153414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *max_uA = rdev->constraints->max_uA; 154414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uA < rdev->constraints->min_uA) 155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *min_uA = rdev->constraints->min_uA; 156414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 157414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uA > *max_uA) 158414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 159414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 160414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 161414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 162414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 163414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* operating mode constraint check */ 164414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_mode(struct regulator_dev *rdev, int mode) 165414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 166e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell switch (mode) { 167e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_FAST: 168e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_NORMAL: 169e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_IDLE: 170e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_STANDBY: 171e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell break; 172e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell default: 173e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell return -EINVAL; 174e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell } 175e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell 176414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 177414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 1781083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev)); 179414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 180414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 181414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) { 182414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 1831083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 184414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 185414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 186414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_modes_mask & mode)) { 187414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid mode %x for %s\n", 1881083c39346d482b9001944d05c09191027892226Mark Brown __func__, mode, rdev_get_name(rdev)); 189414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 190414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 191414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 192414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 193414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 194414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* dynamic regulator mode switching constraint check */ 195414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_drms(struct regulator_dev *rdev) 196414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 197414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 198414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 1991083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev)); 200414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 201414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 202414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) { 203414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 2041083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 205414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 206414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 207414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 208414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 209414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 210414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t device_requested_uA_show(struct device *dev, 211414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 212414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 213414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 214414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 215414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = get_device_regulator(dev); 216414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 217414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 218414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 219414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", regulator->uA_load); 220414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 221414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 222414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uV_show(struct device *dev, 223414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 224414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 225a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 226414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ssize_t ret; 227414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 228414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = sprintf(buf, "%d\n", _regulator_get_voltage(rdev)); 230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2347ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(microvolts, 0444, regulator_uV_show, NULL); 235414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 236414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uA_show(struct device *dev, 237414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 238414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 239a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 240414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev)); 242414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2437ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(microamps, 0444, regulator_uA_show, NULL); 244414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 245bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brownstatic ssize_t regulator_name_show(struct device *dev, 246bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown struct device_attribute *attr, char *buf) 247bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown{ 248bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown struct regulator_dev *rdev = dev_get_drvdata(dev); 249bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 2501083c39346d482b9001944d05c09191027892226Mark Brown return sprintf(buf, "%s\n", rdev_get_name(rdev)); 251bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown} 252bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 2534fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_print_opmode(char *buf, int mode) 254414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 255414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (mode) { 256414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_FAST: 257414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "fast\n"); 258414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_NORMAL: 259414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "normal\n"); 260414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_IDLE: 261414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "idle\n"); 262414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_STANDBY: 263414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "standby\n"); 264414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 265414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 266414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 267414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2684fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_opmode_show(struct device *dev, 2694fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct device_attribute *attr, char *buf) 270414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 271a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 272414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2734fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, _regulator_get_mode(rdev)); 2744fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell} 2757ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(opmode, 0444, regulator_opmode_show, NULL); 2764fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 2774fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_print_state(char *buf, int state) 2784fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell{ 279414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state > 0) 280414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "enabled\n"); 281414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else if (state == 0) 282414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "disabled\n"); 283414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 284414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 285414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 286414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2874fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_state_show(struct device *dev, 2884fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct device_attribute *attr, char *buf) 2894fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell{ 2904fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct regulator_dev *rdev = dev_get_drvdata(dev); 2919332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown ssize_t ret; 2929332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown 2939332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_lock(&rdev->mutex); 2949332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown ret = regulator_print_state(buf, _regulator_is_enabled(rdev)); 2959332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_unlock(&rdev->mutex); 2964fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 2979332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown return ret; 2984fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell} 2997ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(state, 0444, regulator_state_show, NULL); 3004fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 301853116a10544206b6b2cf42ebc9d78fba2668888David Brownellstatic ssize_t regulator_status_show(struct device *dev, 302853116a10544206b6b2cf42ebc9d78fba2668888David Brownell struct device_attribute *attr, char *buf) 303853116a10544206b6b2cf42ebc9d78fba2668888David Brownell{ 304853116a10544206b6b2cf42ebc9d78fba2668888David Brownell struct regulator_dev *rdev = dev_get_drvdata(dev); 305853116a10544206b6b2cf42ebc9d78fba2668888David Brownell int status; 306853116a10544206b6b2cf42ebc9d78fba2668888David Brownell char *label; 307853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 308853116a10544206b6b2cf42ebc9d78fba2668888David Brownell status = rdev->desc->ops->get_status(rdev); 309853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (status < 0) 310853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return status; 311853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 312853116a10544206b6b2cf42ebc9d78fba2668888David Brownell switch (status) { 313853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_OFF: 314853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "off"; 315853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 316853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_ON: 317853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "on"; 318853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 319853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_ERROR: 320853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "error"; 321853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 322853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_FAST: 323853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "fast"; 324853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 325853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_NORMAL: 326853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "normal"; 327853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 328853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_IDLE: 329853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "idle"; 330853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 331853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_STANDBY: 332853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "standby"; 333853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 334853116a10544206b6b2cf42ebc9d78fba2668888David Brownell default: 335853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return -ERANGE; 336853116a10544206b6b2cf42ebc9d78fba2668888David Brownell } 337853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 338853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return sprintf(buf, "%s\n", label); 339853116a10544206b6b2cf42ebc9d78fba2668888David Brownell} 340853116a10544206b6b2cf42ebc9d78fba2668888David Brownellstatic DEVICE_ATTR(status, 0444, regulator_status_show, NULL); 341853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uA_show(struct device *dev, 343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 345a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 346414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 347414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 348414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 350414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uA); 351414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3527ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(min_microamps, 0444, regulator_min_uA_show, NULL); 353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uA_show(struct device *dev, 355414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 356414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 357a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 358414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 359414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 360414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 362414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uA); 363414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3647ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(max_microamps, 0444, regulator_max_uA_show, NULL); 365414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uV_show(struct device *dev, 367414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 368414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 369a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 372414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 374414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uV); 375414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3767ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(min_microvolts, 0444, regulator_min_uV_show, NULL); 377414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uV_show(struct device *dev, 379414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 380414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 381a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 382414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 383414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 384414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uV); 387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3887ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(max_microvolts, 0444, regulator_max_uV_show, NULL); 389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 390414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_total_uA_show(struct device *dev, 391414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 393a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 394414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA = 0; 396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) 399fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese uA += regulator->uA_load; 400414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 401414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", uA); 402414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4037ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL); 404414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 405414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_num_users_show(struct device *dev, 406414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 407414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 408a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 409414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->use_count); 410414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 411414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 412414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_type_show(struct device *dev, 413414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 415a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 416414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 417414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (rdev->desc->type) { 418414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_VOLTAGE: 419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "voltage\n"); 420414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_CURRENT: 421414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "current\n"); 422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 423414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 426414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_uV_show(struct device *dev, 427414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 428414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 429a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 430414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 431414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV); 432414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4337ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_microvolts, 0444, 4347ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_uV_show, NULL); 435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 436414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_uV_show(struct device *dev, 437414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 438414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 439a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 440414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 441414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV); 442414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4437ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_microvolts, 0444, 4447ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_uV_show, NULL); 445414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 446414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_uV_show(struct device *dev, 447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 448414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 449a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 450414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV); 452414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4537ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_microvolts, 0444, 4547ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_uV_show, NULL); 455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_mode_show(struct device *dev, 457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 459a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4614fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4624fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_mem.mode); 463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4647ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_mode, 0444, 4657ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_mode_show, NULL); 466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 467414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_mode_show(struct device *dev, 468414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 470a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4724fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4734fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_disk.mode); 474414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4757ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_mode, 0444, 4767ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_mode_show, NULL); 477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 478414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_mode_show(struct device *dev, 479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 481a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4834fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4844fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_standby.mode); 485414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4867ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_mode, 0444, 4877ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_mode_show, NULL); 488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_state_show(struct device *dev, 490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 492a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 493414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4944fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 4954fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_mem.enabled); 496414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4977ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_state, 0444, 4987ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_state_show, NULL); 499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 500414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_state_show(struct device *dev, 501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 502414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 503a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 504414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 5054fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 5064fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_disk.enabled); 507414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 5087ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_state, 0444, 5097ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_state_show, NULL); 510414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 511414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_state_show(struct device *dev, 512414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 513414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 514a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 5164fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 5174fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_standby.enabled); 518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 5197ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_state, 0444, 5207ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_state_show, NULL); 5217ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 522bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 5237ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell/* 5247ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * These are the only attributes are present for all regulators. 5257ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * Other attributes are a function of regulator functionality. 5267ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 527414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct device_attribute regulator_dev_attrs[] = { 528bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown __ATTR(name, 0444, regulator_name_show, NULL), 529414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(num_users, 0444, regulator_num_users_show, NULL), 530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(type, 0444, regulator_type_show, NULL), 531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR_NULL, 532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 533414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 534414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void regulator_dev_release(struct device *dev) 535414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 536a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(rdev); 538414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 539414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct class regulator_class = { 541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .name = "regulator", 542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_release = regulator_dev_release, 543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_attrs = regulator_dev_attrs, 544414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Calculate the new optimum regulator operating mode based on the new total 547414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumer load. All locks held by caller */ 548414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void drms_uA_update(struct regulator_dev *rdev) 549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 550414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *sibling; 551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int current_uA = 0, output_uV, input_uV, err; 552414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_drms(rdev); 555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0 || !rdev->desc->ops->get_optimum_mode || 556036de8efae4b81f8e1504fab654070cecce6dfa9Dan Carpenter !rdev->desc->ops->get_voltage || !rdev->desc->ops->set_mode) 557036de8efae4b81f8e1504fab654070cecce6dfa9Dan Carpenter return; 558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 559414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 560414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 561414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) 562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 569414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) 570414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 571414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 572414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load */ 573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(sibling, &rdev->consumer_list, list) 574fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese current_uA += sibling->uA_load; 575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now get the optimum mode for our new total regulator load */ 577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV, 578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV, current_uA); 579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 580414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check the new mode is allowed */ 581414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_mode(rdev, mode); 582414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err == 0) 583414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->ops->set_mode(rdev, mode); 584414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 585414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 586414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_set_state(struct regulator_dev *rdev, 587414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_state *rstate) 588414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 589414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 590638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown bool can_set_state; 591638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown 592638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown can_set_state = rdev->desc->ops->set_suspend_enable && 593638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown rdev->desc->ops->set_suspend_disable; 594638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown 595638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown /* If we have no suspend mode configration don't set anything; 596638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown * only warn if the driver actually makes the suspend mode 597638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown * configurable. 598638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown */ 599638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (!rstate->enabled && !rstate->disabled) { 600638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (can_set_state) 601638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown printk(KERN_WARNING "%s: No configuration for %s\n", 602638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown __func__, rdev_get_name(rdev)); 603638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown return 0; 604638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown } 605638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown 606638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (rstate->enabled && rstate->disabled) { 607638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown printk(KERN_ERR "%s: invalid configuration for %s\n", 608638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown __func__, rdev_get_name(rdev)); 609638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown return -EINVAL; 610638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown } 611414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 612638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (!can_set_state) { 613a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR "%s: no way to set suspend state\n", 614a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood __func__); 615414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 616a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 617414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 618414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rstate->enabled) 619414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_enable(rdev); 620414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 621414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_disable(rdev); 622414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enabled/disable\n", __func__); 624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 627414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) { 628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV); 629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set voltage\n", 631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__); 632414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) { 637414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode); 638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set mode\n", __func__); 640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 644414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by caller */ 647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state) 648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (state) { 653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_STANDBY: 654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_standby); 656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MEM: 657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_mem); 659414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MAX: 660414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 661414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_disk); 662414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood default: 663414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 664414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 665414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 666414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 667414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void print_constraints(struct regulator_dev *rdev) 668414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 669414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulation_constraints *constraints = rdev->constraints; 670973e9a2795b3b41d8408a0bb6f87b783c5efc88aMark Brown char buf[80] = ""; 6718f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown int count = 0; 6728f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown int ret; 673414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 6748f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (constraints->min_uV && constraints->max_uV) { 675414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uV == constraints->max_uV) 6768f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d mV ", 6778f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uV / 1000); 678414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 6798f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d <--> %d mV ", 6808f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uV / 1000, 6818f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->max_uV / 1000); 6828f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown } 6838f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 6848f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (!constraints->min_uV || 6858f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uV != constraints->max_uV) { 6868f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown ret = _regulator_get_voltage(rdev); 6878f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (ret > 0) 6888f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "at %d mV ", ret / 1000); 6898f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown } 6908f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 6918f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (constraints->min_uA && constraints->max_uA) { 692414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uA == constraints->max_uA) 6938f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d mA ", 6948f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uA / 1000); 695414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 6968f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d <--> %d mA ", 6978f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uA / 1000, 6988f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->max_uA / 1000); 6998f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown } 7008f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 7018f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (!constraints->min_uA || 7028f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uA != constraints->max_uA) { 7038f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown ret = _regulator_get_current_limit(rdev); 7048f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (ret > 0) 705e4a6376b3b2999d169b602a582a8819d95ff79bcCyril Chemparathy count += sprintf(buf + count, "at %d mA ", ret / 1000); 706414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 7078f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 708414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_FAST) 709414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "fast "); 710414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL) 711414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "normal "); 712414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE) 713414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "idle "); 714414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY) 715414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "standby"); 716414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 7171083c39346d482b9001944d05c09191027892226Mark Brown printk(KERN_INFO "regulator: %s: %s\n", rdev_get_name(rdev), buf); 718414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 719414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 720e79055d62ea6ca3c36962209f4c819614972c95aMark Brownstatic int machine_constraints_voltage(struct regulator_dev *rdev, 7211083c39346d482b9001944d05c09191027892226Mark Brown struct regulation_constraints *constraints) 722a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 723e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown struct regulator_ops *ops = rdev->desc->ops; 7241083c39346d482b9001944d05c09191027892226Mark Brown const char *name = rdev_get_name(rdev); 725af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown int ret; 726af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown 727af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown /* do we need to apply the constraint voltage */ 728af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown if (rdev->constraints->apply_uV && 729af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints->min_uV == rdev->constraints->max_uV && 730af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown ops->set_voltage) { 731af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown ret = ops->set_voltage(rdev, 732af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints->min_uV, rdev->constraints->max_uV); 733af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown if (ret < 0) { 734af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown printk(KERN_ERR "%s: failed to apply %duV constraint to %s\n", 735af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown __func__, 736af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints->min_uV, name); 737af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints = NULL; 738af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown return ret; 739af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown } 740af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown } 741e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown 7424367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* constrain machine-level voltage specs to fit 7434367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * the actual range supported by this regulator. 7444367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 7454367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ops->list_voltage && rdev->desc->n_voltages) { 7464367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int count = rdev->desc->n_voltages; 7474367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int i; 7484367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int min_uV = INT_MAX; 7494367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int max_uV = INT_MIN; 7504367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int cmin = constraints->min_uV; 7514367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int cmax = constraints->max_uV; 7524367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7533e59091828ed5406c879b899b4257fcef7271e2cMark Brown /* it's safe to autoconfigure fixed-voltage supplies 7543e59091828ed5406c879b899b4257fcef7271e2cMark Brown and the constraints are used by list_voltage. */ 7554367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (count == 1 && !cmin) { 7563e59091828ed5406c879b899b4257fcef7271e2cMark Brown cmin = 1; 7574367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell cmax = INT_MAX; 7583e59091828ed5406c879b899b4257fcef7271e2cMark Brown constraints->min_uV = cmin; 7593e59091828ed5406c879b899b4257fcef7271e2cMark Brown constraints->max_uV = cmax; 7604367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7614367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7623e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown /* voltage constraints are optional */ 7633e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown if ((cmin == 0) && (cmax == 0)) 764e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return 0; 7653e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown 7664367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* else require explicit machine-level constraints */ 7673e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown if (cmin <= 0 || cmax <= 0 || cmax < cmin) { 7684367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_err("%s: %s '%s' voltage constraints\n", 7694367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, "invalid", name); 770e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return -EINVAL; 7714367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7724367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7734367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* initial: [cmin..cmax] valid, [min_uV..max_uV] not */ 7744367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell for (i = 0; i < count; i++) { 7754367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int value; 7764367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7774367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell value = ops->list_voltage(rdev, i); 7784367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value <= 0) 7794367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell continue; 7804367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7814367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* maybe adjust [min_uV..max_uV] */ 7824367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value >= cmin && value < min_uV) 7834367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell min_uV = value; 7844367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value <= cmax && value > max_uV) 7854367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell max_uV = value; 7864367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7874367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7884367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* final: [min_uV..max_uV] valid iff constraints valid */ 7894367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (max_uV < min_uV) { 7904367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_err("%s: %s '%s' voltage constraints\n", 7914367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, "unsupportable", name); 792e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return -EINVAL; 7934367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7944367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7954367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* use regulator's subset of machine constraints */ 7964367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (constraints->min_uV < min_uV) { 7974367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_debug("%s: override '%s' %s, %d -> %d\n", 7984367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, name, "min_uV", 7994367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->min_uV, min_uV); 8004367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->min_uV = min_uV; 8014367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8024367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (constraints->max_uV > max_uV) { 8034367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_debug("%s: override '%s' %s, %d -> %d\n", 8044367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, name, "max_uV", 8054367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->max_uV, max_uV); 8064367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->max_uV = max_uV; 8074367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8084367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8094367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 810e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return 0; 811e79055d62ea6ca3c36962209f4c819614972c95aMark Brown} 812e79055d62ea6ca3c36962209f4c819614972c95aMark Brown 813e79055d62ea6ca3c36962209f4c819614972c95aMark Brown/** 814e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * set_machine_constraints - sets regulator constraints 815e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * @rdev: regulator source 816e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * @constraints: constraints to apply 817e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * 818e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * Allows platform initialisation code to define and constrain 819e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * regulator circuits e.g. valid voltage/current ranges, etc. NOTE: 820e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * Constraints *must* be set by platform code in order for some 821e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * regulator operations to proceed i.e. set_voltage, set_current_limit, 822e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * set_mode. 823e79055d62ea6ca3c36962209f4c819614972c95aMark Brown */ 824e79055d62ea6ca3c36962209f4c819614972c95aMark Brownstatic int set_machine_constraints(struct regulator_dev *rdev, 825e79055d62ea6ca3c36962209f4c819614972c95aMark Brown struct regulation_constraints *constraints) 826e79055d62ea6ca3c36962209f4c819614972c95aMark Brown{ 827e79055d62ea6ca3c36962209f4c819614972c95aMark Brown int ret = 0; 828e79055d62ea6ca3c36962209f4c819614972c95aMark Brown const char *name; 829e79055d62ea6ca3c36962209f4c819614972c95aMark Brown struct regulator_ops *ops = rdev->desc->ops; 830e79055d62ea6ca3c36962209f4c819614972c95aMark Brown 831af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints = constraints; 832af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown 8331083c39346d482b9001944d05c09191027892226Mark Brown name = rdev_get_name(rdev); 8341083c39346d482b9001944d05c09191027892226Mark Brown 8351083c39346d482b9001944d05c09191027892226Mark Brown ret = machine_constraints_voltage(rdev, constraints); 836e79055d62ea6ca3c36962209f4c819614972c95aMark Brown if (ret != 0) 837e79055d62ea6ca3c36962209f4c819614972c95aMark Brown goto out; 838e79055d62ea6ca3c36962209f4c819614972c95aMark Brown 839a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* do we need to setup our suspend state */ 840e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (constraints->initial_state) { 841a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = suspend_prepare(rdev, constraints->initial_state); 842e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (ret < 0) { 843e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown printk(KERN_ERR "%s: failed to set suspend state for %s\n", 844e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown __func__, name); 845e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown rdev->constraints = NULL; 846e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown goto out; 847e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown } 848e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown } 849a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 850a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (constraints->initial_mode) { 851a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (!ops->set_mode) { 852a308466c24b4f42bab6945026e938874d22cde50Mark Brown printk(KERN_ERR "%s: no set_mode operation for %s\n", 853a308466c24b4f42bab6945026e938874d22cde50Mark Brown __func__, name); 854a308466c24b4f42bab6945026e938874d22cde50Mark Brown ret = -EINVAL; 855a308466c24b4f42bab6945026e938874d22cde50Mark Brown goto out; 856a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 857a308466c24b4f42bab6945026e938874d22cde50Mark Brown 858a308466c24b4f42bab6945026e938874d22cde50Mark Brown ret = ops->set_mode(rdev, constraints->initial_mode); 859a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (ret < 0) { 860a308466c24b4f42bab6945026e938874d22cde50Mark Brown printk(KERN_ERR 861a308466c24b4f42bab6945026e938874d22cde50Mark Brown "%s: failed to set initial mode for %s: %d\n", 862a308466c24b4f42bab6945026e938874d22cde50Mark Brown __func__, name, ret); 863a308466c24b4f42bab6945026e938874d22cde50Mark Brown goto out; 864a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 865a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 866a308466c24b4f42bab6945026e938874d22cde50Mark Brown 867cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown /* If the constraints say the regulator should be on at this point 868cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown * and we have control then make sure it is enabled. 869cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown */ 870cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown if ((constraints->always_on || constraints->boot_on) && ops->enable) { 871e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown ret = ops->enable(rdev); 872e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown if (ret < 0) { 873e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown printk(KERN_ERR "%s: failed to enable %s\n", 874e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown __func__, name); 875e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown rdev->constraints = NULL; 876e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown goto out; 877e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown } 878e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown } 879e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown 880a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood print_constraints(rdev); 881a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 882a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return ret; 883a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 884a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 885a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 886a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_supply - set regulator supply regulator 88769279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator name 88869279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @supply_rdev: supply regulator name 889a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 890a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Called by platform initialisation code to set the supply regulator for this 891a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator. This ensures that a regulators supply will also be enabled by the 892a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * core if it's child is enabled. 893a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 894a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_supply(struct regulator_dev *rdev, 895a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *supply_rdev) 896a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 897a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int err; 898a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 899a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &supply_rdev->dev.kobj, 900a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "supply"); 901a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (err) { 902a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR 903a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "%s: could not add device link %s err %d\n", 904a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood __func__, supply_rdev->dev.kobj.name, err); 905a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 906a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 907a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->supply = supply_rdev; 908a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->slist, &supply_rdev->supply_list); 909a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 910a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return err; 911a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 912a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 913a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 914a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_consumer_device_supply: Bind a regulator to a symbolic supply 91569279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator source 91669279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @consumer_dev: device the supply applies to 91740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * @consumer_dev_name: dev_name() string for device supply applies to 91869279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @supply: symbolic name for supply 919a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 920a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Allows platform initialisation code to map physical regulator 921a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * sources to symbolic names for supplies for use by devices. Devices 922a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * should use these symbolic names to request regulators, avoiding the 923a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * need to provide board-specific regulator names as platform data. 92440f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * 92540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * Only one of consumer_dev and consumer_dev_name may be specified. 926a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 927a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_consumer_device_supply(struct regulator_dev *rdev, 92840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown struct device *consumer_dev, const char *consumer_dev_name, 92940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *supply) 930a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 931a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_map *node; 9329ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown int has_dev; 933a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 93440f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (consumer_dev && consumer_dev_name) 93540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown return -EINVAL; 93640f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 93740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (!consumer_dev_name && consumer_dev) 93840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown consumer_dev_name = dev_name(consumer_dev); 93940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 940a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (supply == NULL) 941a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -EINVAL; 942a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9439ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (consumer_dev_name != NULL) 9449ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown has_dev = 1; 9459ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown else 9469ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown has_dev = 0; 9479ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown 9486001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell list_for_each_entry(node, ®ulator_map_list, list) { 94923b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula if (node->dev_name && consumer_dev_name) { 95023b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula if (strcmp(node->dev_name, consumer_dev_name) != 0) 95123b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula continue; 95223b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula } else if (node->dev_name || consumer_dev_name) { 9536001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell continue; 95423b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula } 95523b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula 9566001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell if (strcmp(node->supply, supply) != 0) 9576001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell continue; 9586001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell 9596001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell dev_dbg(consumer_dev, "%s/%s is '%s' supply; fail %s/%s\n", 9606001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell dev_name(&node->regulator->dev), 9616001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell node->regulator->desc->name, 9626001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell supply, 9631083c39346d482b9001944d05c09191027892226Mark Brown dev_name(&rdev->dev), rdev_get_name(rdev)); 9646001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell return -EBUSY; 9656001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell } 9666001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell 9679ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown node = kzalloc(sizeof(struct regulator_map), GFP_KERNEL); 968a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (node == NULL) 969a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -ENOMEM; 970a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 971a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->regulator = rdev; 972a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->supply = supply; 973a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9749ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (has_dev) { 9759ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown node->dev_name = kstrdup(consumer_dev_name, GFP_KERNEL); 9769ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (node->dev_name == NULL) { 9779ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown kfree(node); 9789ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown return -ENOMEM; 9799ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown } 98040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown } 98140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 982a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&node->list, ®ulator_map_list); 983a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return 0; 984a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 985a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9860f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoportstatic void unset_regulator_supplies(struct regulator_dev *rdev) 9870f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport{ 9880f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport struct regulator_map *node, *n; 9890f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport 9900f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport list_for_each_entry_safe(node, n, ®ulator_map_list, list) { 9910f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport if (rdev == node->regulator) { 9920f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport list_del(&node->list); 99340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown kfree(node->dev_name); 9940f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport kfree(node); 9950f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport } 9960f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport } 9970f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport} 9980f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport 999414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#define REG_STR_SIZE 32 1000414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1001414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *create_regulator(struct regulator_dev *rdev, 1002414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev, 1003414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply_name) 1004414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1005414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 1006414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char buf[REG_STR_SIZE]; 1007414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int err, size; 1008414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1009414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = kzalloc(sizeof(*regulator), GFP_KERNEL); 1010414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 1011414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 1012414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1013414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1014414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev = rdev; 1015414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_add(®ulator->list, &rdev->consumer_list); 1016414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1017414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (dev) { 1018414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* create a 'requested_microamps_name' sysfs entry */ 1019414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "microamps_requested_%s", 1020414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood supply_name); 1021414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 1022414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto overflow_err; 1023414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1024414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev = dev; 10254f26a2abe1eed18dc6adddf2d0ae5553e51578c2Ameya Palande sysfs_attr_init(®ulator->dev_attr.attr); 1026414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.name = kstrdup(buf, GFP_KERNEL); 1027414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev_attr.attr.name == NULL) 1028414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 1029414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1030414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.mode = 0444; 1031414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.show = device_requested_uA_show; 1032414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = device_create_file(dev, ®ulator->dev_attr); 1033414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0) { 1034414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING "%s: could not add regulator_dev" 1035414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood " load sysfs\n", __func__); 1036414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 1037414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1038414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1039414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* also add a link to the device sysfs entry */ 1040414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "%s-%s", 1041414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood dev->kobj.name, supply_name); 1042414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 1043414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 1044414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1045414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->supply_name = kstrdup(buf, GFP_KERNEL); 1046414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->supply_name == NULL) 1047414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 1048414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1049414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &dev->kobj, 1050414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood buf); 1051414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err) { 1052414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING 1053414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood "%s: could not add device link %s err %d\n", 1054414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, dev->kobj.name, err); 1055414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(dev, ®ulator->dev_attr); 1056414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto link_name_err; 1057414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1058414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1059414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1060414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1061414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodlink_name_err: 1062414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 1063414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_err: 1064414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 1065414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_name_err: 1066414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 1067414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodoverflow_err: 1068414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 1069414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 1070414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1071414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 1072414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1073414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 107431aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brownstatic int _regulator_get_enable_time(struct regulator_dev *rdev) 107531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown{ 107631aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (!rdev->desc->ops->enable_time) 107731aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown return 0; 107831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown return rdev->desc->ops->enable_time(rdev); 107931aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown} 108031aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 10815ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/* Internal regulator request function */ 10825ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstatic struct regulator *_regulator_get(struct device *dev, const char *id, 10835ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown int exclusive) 1084414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1085414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1086414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_map *map; 1087414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = ERR_PTR(-ENODEV); 108840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *devname = NULL; 10895ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown int ret; 1090414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1091414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (id == NULL) { 1092414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "regulator: get() with no identifier\n"); 1093414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1094414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1095414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 109640f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (dev) 109740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown devname = dev_name(dev); 109840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 1099414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1101414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(map, ®ulator_map_list, list) { 110240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown /* If the mapping has a device set up it must match */ 110340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (map->dev_name && 110440f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown (!devname || strcmp(map->dev_name, devname))) 110540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown continue; 110640f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 110740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (strcmp(map->supply, id) == 0) { 1108a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev = map->regulator; 1109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto found; 1110a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1111414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 111234abbd68efe09765465b81dfedeee9994f13302fMark Brown 1113688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown if (board_wants_dummy_regulator) { 1114688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown rdev = dummy_regulator_rdev; 1115688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown goto found; 1116688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown } 1117688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown 111834abbd68efe09765465b81dfedeee9994f13302fMark Brown#ifdef CONFIG_REGULATOR_DUMMY 111934abbd68efe09765465b81dfedeee9994f13302fMark Brown if (!devname) 112034abbd68efe09765465b81dfedeee9994f13302fMark Brown devname = "deviceless"; 112134abbd68efe09765465b81dfedeee9994f13302fMark Brown 112234abbd68efe09765465b81dfedeee9994f13302fMark Brown /* If the board didn't flag that it was fully constrained then 112334abbd68efe09765465b81dfedeee9994f13302fMark Brown * substitute in a dummy regulator so consumers can continue. 112434abbd68efe09765465b81dfedeee9994f13302fMark Brown */ 112534abbd68efe09765465b81dfedeee9994f13302fMark Brown if (!has_full_constraints) { 112634abbd68efe09765465b81dfedeee9994f13302fMark Brown pr_warning("%s supply %s not found, using dummy regulator\n", 112734abbd68efe09765465b81dfedeee9994f13302fMark Brown devname, id); 112834abbd68efe09765465b81dfedeee9994f13302fMark Brown rdev = dummy_regulator_rdev; 112934abbd68efe09765465b81dfedeee9994f13302fMark Brown goto found; 113034abbd68efe09765465b81dfedeee9994f13302fMark Brown } 113134abbd68efe09765465b81dfedeee9994f13302fMark Brown#endif 113234abbd68efe09765465b81dfedeee9994f13302fMark Brown 1133414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1134414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1135414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodfound: 11375ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (rdev->exclusive) { 11385ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown regulator = ERR_PTR(-EPERM); 11395ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown goto out; 11405ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 11415ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11425ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (exclusive && rdev->open_count) { 11435ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown regulator = ERR_PTR(-EBUSY); 11445ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown goto out; 11455ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 11465ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1147a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (!try_module_get(rdev->owner)) 1148a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 1149a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1150414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = create_regulator(rdev, dev, id); 1151414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) { 1152414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = ERR_PTR(-ENOMEM); 1153414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 1154414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 11565ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->open_count++; 11575ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (exclusive) { 11585ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->exclusive = 1; 11595ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11605ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown ret = _regulator_is_enabled(rdev); 11615ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (ret > 0) 11625ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->use_count = 1; 11635ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown else 11645ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->use_count = 0; 11655ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 11665ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1167a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 1168414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 11695ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1170414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1171414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 11725ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11735ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/** 11745ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator_get - lookup and obtain a reference to a regulator. 11755ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @dev: device for regulator "consumer" 11765ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @id: Supply name or regulator ID. 11775ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11785ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Returns a struct regulator corresponding to the regulator producer, 11795ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * or IS_ERR() condition containing errno. 11805ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11815ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Use of supply names configured via regulator_set_device_supply() is 11825ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * strongly encouraged. It is recommended that the supply name used 11835ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * should match the name used for the supply and/or the relevant 11845ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * device pins in the datasheet. 11855ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown */ 11865ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstruct regulator *regulator_get(struct device *dev, const char *id) 11875ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown{ 11885ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown return _regulator_get(dev, id, 0); 11895ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown} 1190414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get); 1191414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1192414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 11935ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator_get_exclusive - obtain exclusive access to a regulator. 11945ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @dev: device for regulator "consumer" 11955ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @id: Supply name or regulator ID. 11965ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11975ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Returns a struct regulator corresponding to the regulator producer, 11985ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * or IS_ERR() condition containing errno. Other consumers will be 11995ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * unable to obtain this reference is held and the use count for the 12005ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator will be initialised to reflect the current state of the 12015ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator. 12025ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 12035ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * This is intended for use by consumers which cannot tolerate shared 12045ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * use of the regulator such as those which need to force the 12055ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator off for correct operation of the hardware they are 12065ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * controlling. 12075ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 12085ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Use of supply names configured via regulator_set_device_supply() is 12095ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * strongly encouraged. It is recommended that the supply name used 12105ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * should match the name used for the supply and/or the relevant 12115ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * device pins in the datasheet. 12125ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown */ 12135ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstruct regulator *regulator_get_exclusive(struct device *dev, const char *id) 12145ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown{ 12155ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown return _regulator_get(dev, id, 1); 12165ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown} 12175ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark BrownEXPORT_SYMBOL_GPL(regulator_get_exclusive); 12185ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 12195ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/** 1220414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_put - "free" the regulator source 1221414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1222414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1223414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Note: drivers must ensure that all regulator_enable calls made on this 1224414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator source are balanced by regulator_disable calls prior to calling 1225414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * this function. 1226414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1227414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_put(struct regulator *regulator) 1228414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL || IS_ERR(regulator)) 1232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 1233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1234414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1235414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = regulator->rdev; 1236414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1237414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* remove any sysfs entries */ 1238414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev) { 1239414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name); 1240414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 1241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 1242414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 1243414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1244414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 1245414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 1246414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 12475ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->open_count--; 12485ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->exclusive = 0; 12495ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1250414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 1251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1252414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1253414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_put); 1254414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 12559a2372fa7a403ba327873d0208a619d781a8a150Mark Brownstatic int _regulator_can_change_status(struct regulator_dev *rdev) 12569a2372fa7a403ba327873d0208a619d781a8a150Mark Brown{ 12579a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (!rdev->constraints) 12589a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 0; 12599a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 12609a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_STATUS) 12619a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 1; 12629a2372fa7a403ba327873d0208a619d781a8a150Mark Brown else 12639a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 0; 12649a2372fa7a403ba327873d0208a619d781a8a150Mark Brown} 12659a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 1266414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_enable() */ 1267414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_enable(struct regulator_dev *rdev) 1268414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 126931aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown int ret, delay; 1270414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1271414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* do we need to enable the supply regulator first */ 1272414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) { 1273414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_enable(rdev->supply); 1274414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enable %s: %d\n", 12761083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev), ret); 1277414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1278414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1279414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1280414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1281414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check voltage and requested load before enabling */ 12829a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (rdev->constraints && 12839a2372fa7a403ba327873d0208a619d781a8a150Mark Brown (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) 12849a2372fa7a403ba327873d0208a619d781a8a150Mark Brown drms_uA_update(rdev); 1285414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 12869a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (rdev->use_count == 0) { 12879a2372fa7a403ba327873d0208a619d781a8a150Mark Brown /* The regulator may on if it's not switchable or left on */ 12889a2372fa7a403ba327873d0208a619d781a8a150Mark Brown ret = _regulator_is_enabled(rdev); 12899a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (ret == -EINVAL || ret == 0) { 12909a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (!_regulator_can_change_status(rdev)) 12919a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return -EPERM; 12929a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 129331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (!rdev->desc->ops->enable) 12949a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return -EINVAL; 129531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 129631aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown /* Query before enabling in case configuration 129731aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown * dependant. */ 129831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown ret = _regulator_get_enable_time(rdev); 129931aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (ret >= 0) { 130031aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown delay = ret; 130131aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown } else { 130231aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown printk(KERN_WARNING 130331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown "%s: enable_time() failed for %s: %d\n", 130431aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown __func__, rdev_get_name(rdev), 130531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown ret); 130631aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown delay = 0; 13079a2372fa7a403ba327873d0208a619d781a8a150Mark Brown } 130831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 130931aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown /* Allow the regulator to ramp; it would be useful 131031aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown * to extend this for bulk operations so that the 131131aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown * regulators can ramp together. */ 131231aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown ret = rdev->desc->ops->enable(rdev); 131331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (ret < 0) 131431aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown return ret; 131531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 131631aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (delay >= 1000) 131731aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown mdelay(delay / 1000); 131831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown else if (delay) 131931aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown udelay(delay); 132031aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 1321a7433cff9ed8e7982de8e0f210f0325d0f3d1949Linus Walleij } else if (ret < 0) { 13229a2372fa7a403ba327873d0208a619d781a8a150Mark Brown printk(KERN_ERR "%s: is_enabled() failed for %s: %d\n", 13231083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev), ret); 1324414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1325414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1326a7433cff9ed8e7982de8e0f210f0325d0f3d1949Linus Walleij /* Fallthrough on positive return values - already enabled */ 1327414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1328414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 13299a2372fa7a403ba327873d0208a619d781a8a150Mark Brown rdev->use_count++; 13309a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 13319a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 0; 1332414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1333414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1334414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1335414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_enable - enable regulator output 1336414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1337414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1338cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * Request that the regulator be enabled with the regulator output at 1339cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * the predefined voltage or current value. Calls to regulator_enable() 1340cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * must be balanced with calls to regulator_disable(). 1341cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * 1342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: the output value can be set by other drivers, boot loader or may be 1343cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * hardwired in the regulator. 1344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1345414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_enable(struct regulator *regulator) 1346414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1347412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell struct regulator_dev *rdev = regulator->rdev; 1348412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int ret = 0; 1349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1350412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_lock(&rdev->mutex); 1351cd94b5053081963614f6ad77b9b66a7968056c84David Brownell ret = _regulator_enable(rdev); 1352412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_unlock(&rdev->mutex); 1353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1355414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_enable); 1356414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1357414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_disable() */ 13588cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlylestatic int _regulator_disable(struct regulator_dev *rdev, 13598cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev **supply_rdev_ptr) 1360414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1362b12a1e29af595d05612153bcb85258193bbf9382Mattias Wallin *supply_rdev_ptr = NULL; 1363414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1364cd94b5053081963614f6ad77b9b66a7968056c84David Brownell if (WARN(rdev->use_count <= 0, 1365cd94b5053081963614f6ad77b9b66a7968056c84David Brownell "unbalanced disables for %s\n", 13661083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev))) 1367cd94b5053081963614f6ad77b9b66a7968056c84David Brownell return -EIO; 1368cd94b5053081963614f6ad77b9b66a7968056c84David Brownell 1369414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* are we the last user and permitted to disable ? */ 137060ef66fcf40f0e7bc9579981aa16bd8218942a83Mark Brown if (rdev->use_count == 1 && 137160ef66fcf40f0e7bc9579981aa16bd8218942a83Mark Brown (rdev->constraints && !rdev->constraints->always_on)) { 1372414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* we are last user */ 13749a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (_regulator_can_change_status(rdev) && 13759a2372fa7a403ba327873d0208a619d781a8a150Mark Brown rdev->desc->ops->disable) { 1376414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1377414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to disable %s\n", 13791083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 1380414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1381414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 138284b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown 138384b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE, 138484b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown NULL); 1385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 13888cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle *supply_rdev_ptr = rdev->supply; 1389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1390414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1391414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } else if (rdev->use_count > 1) { 1392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1393414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints && 1394414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood (rdev->constraints->valid_ops_mask & 1395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood REGULATOR_CHANGE_DRMS)) 1396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood drms_uA_update(rdev); 1397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count--; 1399414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1400414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1401414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1402414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1403414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1404414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_disable - disable regulator output 1405414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1406414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1407cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * Disable the regulator output voltage or current. Calls to 1408cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_enable() must be balanced with calls to 1409cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_disable(). 141069279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * 1411414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this will only disable the regulator output if no other consumer 1412cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * devices have it enabled, the regulator device supports disabling and 1413cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * machine constraints permit this operation. 1414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1415414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_disable(struct regulator *regulator) 1416414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1417412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell struct regulator_dev *rdev = regulator->rdev; 14188cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev *supply_rdev = NULL; 1419412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int ret = 0; 1420414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1421412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_lock(&rdev->mutex); 14228cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle ret = _regulator_disable(rdev, &supply_rdev); 1423412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_unlock(&rdev->mutex); 14248cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 14258cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle /* decrease our supplies ref count and disable if required */ 14268cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle while (supply_rdev != NULL) { 14278cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle rdev = supply_rdev; 14288cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 14298cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle mutex_lock(&rdev->mutex); 14308cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle _regulator_disable(rdev, &supply_rdev); 14318cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle mutex_unlock(&rdev->mutex); 14328cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle } 14338cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 1434414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1436414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_disable); 1437414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1438414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_force_disable() */ 14398cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlylestatic int _regulator_force_disable(struct regulator_dev *rdev, 14408cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev **supply_rdev_ptr) 1441414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1442414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1443414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1444414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* force disable */ 1445414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->disable) { 1446414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ah well, who wants to live forever... */ 1447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1448414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1449414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to force disable %s\n", 14501083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 1451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1452414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* notify other consumers that power has been forced off */ 145484b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE | 145584b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown REGULATOR_EVENT_DISABLE, NULL); 1456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 14598cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle *supply_rdev_ptr = rdev->supply; 1460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1462414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_force_disable - force disable regulator output 1467414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1468414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Forcibly disable the regulator output voltage or current. 1470414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this *will* disable the regulator output even if other consumer 1471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * devices have it enabled. This should be used for situations when device 1472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * damage will likely occur if the regulator is not disabled (e.g. over temp). 1473414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1474414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_force_disable(struct regulator *regulator) 1475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 14768cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev *supply_rdev = NULL; 1477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1478414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = 0; 14818cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle ret = _regulator_force_disable(regulator->rdev, &supply_rdev); 1482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 14838cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 14848cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle if (supply_rdev) 14858cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle regulator_disable(get_device_regulator(rdev_get_dev(supply_rdev))); 14868cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 1487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1489414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_force_disable); 1490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev) 1492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 14939a7f6a4c6edc84748c6477c9df56691a0e61b8fdMark Brown /* If we don't know then assume that the regulator is always on */ 14949332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown if (!rdev->desc->ops->is_enabled) 14959a7f6a4c6edc84748c6477c9df56691a0e61b8fdMark Brown return 1; 1496414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 14979332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown return rdev->desc->ops->is_enabled(rdev); 1498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1500414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_is_enabled - is the regulator output enabled 1502414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1503414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1504412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * Returns positive if the regulator driver backing the source/client 1505412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * has requested that the device be enabled, zero if it hasn't, else a 1506412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * negative errno code. 1507412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * 1508412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * Note that the device backing this regulator handle can have multiple 1509412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * users, so it might be enabled even if regulator_enable() was never 1510412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * called for this particular source. 1511414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1512414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_is_enabled(struct regulator *regulator) 1513414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 15149332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown int ret; 15159332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown 15169332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_lock(®ulator->rdev->mutex); 15179332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown ret = _regulator_is_enabled(regulator->rdev); 15189332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_unlock(®ulator->rdev->mutex); 15199332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown 15209332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown return ret; 1521414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1522414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_is_enabled); 1523414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1524414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 15254367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * regulator_count_voltages - count regulator_list_voltage() selectors 15264367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @regulator: regulator source 15274367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * 15284367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Returns number of selectors, or negative errno. Selectors are 15294367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * numbered starting at zero, and typically correspond to bitfields 15304367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * in hardware registers. 15314367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 15324367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownellint regulator_count_voltages(struct regulator *regulator) 15334367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell{ 15344367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_dev *rdev = regulator->rdev; 15354367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15364367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return rdev->desc->n_voltages ? : -EINVAL; 15374367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell} 15384367cfdc7c657ad8a797f51b9ffd3c64b31910e7David BrownellEXPORT_SYMBOL_GPL(regulator_count_voltages); 15394367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15404367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell/** 15414367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * regulator_list_voltage - enumerate supported voltages 15424367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @regulator: regulator source 15434367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @selector: identify voltage to list 15444367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Context: can sleep 15454367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * 15464367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Returns a voltage that can be passed to @regulator_set_voltage(), 154788393161210493e317ae391696ee8ef463cb3c23Thomas Weber * zero if this selector code can't be used on this system, or a 15484367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * negative errno. 15494367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 15504367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownellint regulator_list_voltage(struct regulator *regulator, unsigned selector) 15514367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell{ 15524367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_dev *rdev = regulator->rdev; 15534367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_ops *ops = rdev->desc->ops; 15544367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int ret; 15554367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15564367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (!ops->list_voltage || selector >= rdev->desc->n_voltages) 15574367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return -EINVAL; 15584367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15594367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell mutex_lock(&rdev->mutex); 15604367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = ops->list_voltage(rdev, selector); 15614367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell mutex_unlock(&rdev->mutex); 15624367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15634367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ret > 0) { 15644367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ret < rdev->constraints->min_uV) 15654367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = 0; 15664367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell else if (ret > rdev->constraints->max_uV) 15674367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = 0; 15684367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 15694367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15704367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return ret; 15714367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell} 15724367cfdc7c657ad8a797f51b9ffd3c64b31910e7David BrownellEXPORT_SYMBOL_GPL(regulator_list_voltage); 15734367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15744367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell/** 1575a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * regulator_is_supported_voltage - check if a voltage range can be supported 1576a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * 1577a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @regulator: Regulator to check. 1578a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @min_uV: Minimum required voltage in uV. 1579a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @max_uV: Maximum required voltage in uV. 1580a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * 1581a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * Returns a boolean or a negative error code. 1582a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown */ 1583a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brownint regulator_is_supported_voltage(struct regulator *regulator, 1584a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown int min_uV, int max_uV) 1585a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown{ 1586a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown int i, voltages, ret; 1587a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1588a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown ret = regulator_count_voltages(regulator); 1589a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown if (ret < 0) 1590a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return ret; 1591a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown voltages = ret; 1592a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1593a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown for (i = 0; i < voltages; i++) { 1594a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown ret = regulator_list_voltage(regulator, i); 1595a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1596a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown if (ret >= min_uV && ret <= max_uV) 1597a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return 1; 1598a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown } 1599a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1600a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return 0; 1601a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown} 1602a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1603a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown/** 1604414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_voltage - set regulator output voltage 1605414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1606414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uV: Minimum required voltage in uV 1607414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uV: Maximum acceptable voltage in uV 1608414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1609414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets a voltage regulator to the desired output voltage. This can be set 1610414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * during any regulator state. IOW, regulator can be disabled or enabled. 1611414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1612414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the voltage will change to the new value 1613414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1614414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new voltage when enabled. 1615414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1616414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is shared between several devices then the lowest 1617414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * request voltage that meets the system constraints will be used. 161869279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * Regulator system constraints must be set for this regulator before 1619414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1620414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1621414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) 1622414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1627414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_voltage) { 1630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1632414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_voltage(rdev, &min_uV, &max_uV); 1636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1637414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->min_uV = min_uV; 1639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->max_uV = max_uV; 1640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV); 1641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1643b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, NULL); 1644414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1647414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_voltage); 1648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev) 1650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->get_voltage) 1653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->ops->get_voltage(rdev); 1654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 1656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1659414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_voltage - get regulator output voltage 1660414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1661414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1662414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current regulator voltage in uV. 1663414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1664414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the voltage value. This 1665414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1666414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1667414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_voltage(struct regulator *regulator) 1668414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1669414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1670414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1671414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1672414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1673414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_get_voltage(regulator->rdev); 1674414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1675414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1676414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1677414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1678414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1679414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_voltage); 1680414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1681414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1682414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_current_limit - set regulator output current limit 1683414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1684414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uA: Minimuum supported current in uA 1685414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uA: Maximum supported current in uA 1686414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1687414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets current sink to the desired output current. This can be set during 1688414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * any regulator state. IOW, regulator can be disabled or enabled. 1689414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1690414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the current will change to the new value 1691414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1692414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new current when enabled. 1693414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1694414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1695414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1696414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1697414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_current_limit(struct regulator *regulator, 1698414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uA, int max_uA) 1699414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1700414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1701414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1702414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1703414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1704414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1705414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1706414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_current_limit) { 1707414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1708414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1709414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1710414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1711414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1712414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_current_limit(rdev, &min_uA, &max_uA); 1713414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1714414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1715414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1716414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA); 1717414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1718414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1719414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1720414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1721414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_current_limit); 1722414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1723414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev) 1724414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1725414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1726414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1727414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1728414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1729414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1730414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_current_limit) { 1731414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1732414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1733414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1734414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1735414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_current_limit(rdev); 1736414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1737414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1738414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1739414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1740414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1741414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1742414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_current_limit - get regulator output current 1743414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1744414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1745414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current supplied by the specified current sink in uA. 1746414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1747414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the current value. This 1748414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1749414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1750414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_current_limit(struct regulator *regulator) 1751414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1752414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_current_limit(regulator->rdev); 1753414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1754414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_current_limit); 1755414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1756414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1757414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_mode - set regulator operating mode 1758414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1759414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @mode: operating mode - one of the REGULATOR_MODE constants 1760414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1761414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Set regulator operating mode to increase regulator efficiency or improve 1762414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulation performance. 1763414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1764414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1765414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1766414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1767414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_mode(struct regulator *regulator, unsigned int mode) 1768414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1769414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1770414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1771500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer int regulator_curr_mode; 1772414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1773414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1774414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1775414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1776414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_mode) { 1777414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1778414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1779414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1780414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1781500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer /* return if the same mode is requested */ 1782500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer if (rdev->desc->ops->get_mode) { 1783500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer regulator_curr_mode = rdev->desc->ops->get_mode(rdev); 1784500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer if (regulator_curr_mode == mode) { 1785500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer ret = 0; 1786500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer goto out; 1787500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer } 1788500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer } 1789500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer 1790414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1791414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_mode(rdev, mode); 1792414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1793414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1794414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1795414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1796414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1797414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1798414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1799414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1800414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_mode); 1801414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1802414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev) 1803414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1804414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1805414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1806414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1807414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1808414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1809414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_mode) { 1810414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1811414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1812414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1813414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1814414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_mode(rdev); 1815414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1816414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1817414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1818414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1819414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1820414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1821414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_mode - get regulator operating mode 1822414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1823414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1824414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get the current regulator operating mode. 1825414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1826414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodunsigned int regulator_get_mode(struct regulator *regulator) 1827414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1828414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_mode(regulator->rdev); 1829414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1830414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_mode); 1831414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1832414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1833414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_optimum_mode - set regulator optimum operating mode 1834414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1835414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @uA_load: load current 1836414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1837414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Notifies the regulator core of a new device load. This is then used by 1838414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS (if enabled by constraints) to set the most efficient regulator 1839414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * operating mode for the new regulator loading. 1840414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1841414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Consumer devices notify their supply regulator of the maximum power 1842414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * they will require (can be taken from device datasheet in the power 1843414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption tables) when they change operational status and hence power 1844414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * state. Examples of operational state changes that can affect power 1845414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption are :- 1846414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1847414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is opened / closed. 1848414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device I/O is about to begin or has just finished. 1849414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is idling in between work. 1850414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1851414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This information is also exported via sysfs to userspace. 1852414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1853414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS will sum the total requested load on the regulator and change 1854414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * to the most efficient operating mode if platform constraints allow. 1855414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1856414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns the new regulator mode or error. 1857414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1858414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_optimum_mode(struct regulator *regulator, int uA_load) 1859414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1860414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1861414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *consumer; 1862414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret, output_uV, input_uV, total_uA_load = 0; 1863414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 1864414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1865414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1866414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1867414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = uA_load; 1868414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_drms(rdev); 1869414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1870414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1871414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1872414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1873414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1874414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_optimum_mode) 1875414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1876414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1877414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 1878414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 1879414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) { 1880414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid output voltage found for %s\n", 18811083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 1882414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1883414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1884414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1885414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 1886414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 1887414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 1888414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1889414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 1890414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) { 1891414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid input voltage found for %s\n", 18921083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 1893414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1894414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1895414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1896414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load for this regulator */ 1897414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(consumer, &rdev->consumer_list, list) 1898fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese total_uA_load += consumer->uA_load; 1899414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1900414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, 1901414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV, output_uV, 1902414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load); 1903e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell ret = regulator_check_mode(rdev, mode); 1904e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell if (ret < 0) { 1905414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to get optimum mode for %s @" 19061083c39346d482b9001944d05c09191027892226Mark Brown " %d uA %d -> %d uV\n", __func__, rdev_get_name(rdev), 1907414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load, input_uV, output_uV); 1908414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1909414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1910414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1911414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1912e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell if (ret < 0) { 1913414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set optimum mode %x for %s\n", 19141083c39346d482b9001944d05c09191027892226Mark Brown __func__, mode, rdev_get_name(rdev)); 1915414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1916414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1917414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = mode; 1918414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1919414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1920414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1921414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1922414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_optimum_mode); 1923414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1924414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1925414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register_notifier - register regulator event notifier 1926414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 192769279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @nb: notifier block 1928414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1929414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Register notifier block to receive regulator events. 1930414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1931414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_register_notifier(struct regulator *regulator, 1932414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1933414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1934414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_register(®ulator->rdev->notifier, 1935414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1936414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1937414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register_notifier); 1938414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1939414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1940414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister_notifier - unregister regulator event notifier 1941414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 194269279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @nb: notifier block 1943414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1944414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Unregister regulator event notifier block. 1945414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1946414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_unregister_notifier(struct regulator *regulator, 1947414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1948414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1949414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_unregister(®ulator->rdev->notifier, 1950414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1951414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1952414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister_notifier); 1953414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1954b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron/* notify regulator consumers and downstream regulator consumers. 1955b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron * Note mutex must be held by caller. 1956b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron */ 1957414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 1958414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 1959414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1960414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *_rdev; 1961414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1962414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* call rdev chain first */ 1963414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood blocking_notifier_call_chain(&rdev->notifier, event, NULL); 1964414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1965414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now notify regulator we supply */ 1966b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron list_for_each_entry(_rdev, &rdev->supply_list, slist) { 1967fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese mutex_lock(&_rdev->mutex); 1968fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese _notifier_call_chain(_rdev, event, data); 1969fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese mutex_unlock(&_rdev->mutex); 1970b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron } 1971414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1972414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1973414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1974414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_get - get multiple regulator consumers 1975414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1976414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @dev: Device to supply 1977414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers to register 1978414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Configuration of consumers; clients are stored here. 1979414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1980414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure. 1981414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1982414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This helper function allows drivers to get several regulator 1983414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumers in one operation. If any of the regulators cannot be 1984414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * acquired then any regulators that were allocated will be freed 1985414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * before returning to the caller. 1986414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1987414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_get(struct device *dev, int num_consumers, 1988414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1989414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1990414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1991414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1992414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1993414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 1994414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 1995414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1996414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1997414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = regulator_get(dev, 1998414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].supply); 1999414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (IS_ERR(consumers[i].consumer)) { 2000414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = PTR_ERR(consumers[i].consumer); 20015b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown dev_err(dev, "Failed to get supply '%s': %d\n", 20025b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown consumers[i].supply, ret); 2003414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 2004414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 2005414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2006414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2007414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2008414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 2009414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2010414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 2011414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers && consumers[i].consumer; i++) 2012414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 2013414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2014414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2015414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2016414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_get); 2017414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2018414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2019414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_enable - enable multiple regulator consumers 2020414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2021414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 2022414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 2023414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 2024414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2025414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to enable multiple regulator 2026414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 2027414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were enabled will be disabled again prior to 2028414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 2029414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2030414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_enable(int num_consumers, 2031414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2032414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2033414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2034414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 2035414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2036414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2037414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_enable(consumers[i].consumer); 2038414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 2039414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 2040414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2041414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2042414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 2043414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2044414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 20455b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown printk(KERN_ERR "Failed to enable %s: %d\n", consumers[i].supply, ret); 2046eb143ac1b9f56ca9c6dc782d795acda1f60c5fd2Lars-Peter Clausen for (--i; i >= 0; --i) 2047414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_disable(consumers[i].consumer); 2048414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2049414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2050414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2051414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_enable); 2052414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2053414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2054414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_disable - disable multiple regulator consumers 2055414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2056414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 2057414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 2058414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 2059414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2060414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to disable multiple regulator 2061414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 2062414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were disabled will be disabled again prior to 2063414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 2064414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2065414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_disable(int num_consumers, 2066414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2067414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2068414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2069414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 2070414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2071414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2072414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_disable(consumers[i].consumer); 2073414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 2074414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 2075414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2076414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2077414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 2078414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2079414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 20805b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown printk(KERN_ERR "Failed to disable %s: %d\n", consumers[i].supply, 20815b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown ret); 2082eb143ac1b9f56ca9c6dc782d795acda1f60c5fd2Lars-Peter Clausen for (--i; i >= 0; --i) 2083414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_enable(consumers[i].consumer); 2084414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2085414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2086414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2087414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_disable); 2088414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2089414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2090414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_free - free multiple regulator consumers 2091414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2092414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 2093414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 2094414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2095414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to free multiple regulator 2096414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. 2097414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2098414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_bulk_free(int num_consumers, 2099414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2101414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2103414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 2105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 2106414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2107414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2108414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_free); 2109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2110414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2111414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_notifier_call_chain - call regulator event notifier 211269279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator source 2113414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @event: notifier block 211469279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @data: callback-specific data. 2115414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2116414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to notify clients a regulator event has 2117414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * occurred. We also notify regulator clients downstream. 2118b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron * Note lock must be held by caller. 2119414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2120414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_notifier_call_chain(struct regulator_dev *rdev, 2121414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 2122414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2123414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(rdev, event, data); 2124414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NOTIFY_DONE; 2125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2126414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2127414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_notifier_call_chain); 2128414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2129be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown/** 2130be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * regulator_mode_to_status - convert a regulator mode into a status 2131be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * 2132be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * @mode: Mode to convert 2133be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * 2134be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * Convert a regulator mode into a status. 2135be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown */ 2136be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brownint regulator_mode_to_status(unsigned int mode) 2137be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown{ 2138be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown switch (mode) { 2139be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_FAST: 2140be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_FAST; 2141be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_NORMAL: 2142be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_NORMAL; 2143be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_IDLE: 2144be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_IDLE; 2145be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_STATUS_STANDBY: 2146be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_STANDBY; 2147be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown default: 2148be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return 0; 2149be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown } 2150be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown} 2151be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark BrownEXPORT_SYMBOL_GPL(regulator_mode_to_status); 2152be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown 21537ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell/* 21547ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * To avoid cluttering sysfs (and memory) with useless state, only 21557ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * create attributes that can be meaningfully displayed. 21567ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 21577ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic int add_regulator_attributes(struct regulator_dev *rdev) 21587ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell{ 21597ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell struct device *dev = &rdev->dev; 21607ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell struct regulator_ops *ops = rdev->desc->ops; 21617ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell int status = 0; 21627ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 21637ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* some attributes need specific methods to be displayed */ 21647ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_voltage) { 21657ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_microvolts); 21667ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21677ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21687ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 21697ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_current_limit) { 21707ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_microamps); 21717ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21727ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21737ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 21747ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_mode) { 21757ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_opmode); 21767ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21777ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21787ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 21797ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->is_enabled) { 21807ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_state); 21817ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21827ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21837ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 2184853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (ops->get_status) { 2185853116a10544206b6b2cf42ebc9d78fba2668888David Brownell status = device_create_file(dev, &dev_attr_status); 2186853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (status < 0) 2187853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return status; 2188853116a10544206b6b2cf42ebc9d78fba2668888David Brownell } 21897ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 21907ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* some attributes are type-specific */ 21917ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (rdev->desc->type == REGULATOR_CURRENT) { 21927ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_requested_microamps); 21937ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21947ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21957ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 21967ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 21977ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* all the other attributes exist to support constraints; 21987ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * don't show them if there are no constraints, or if the 21997ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * relevant supporting methods are missing. 22007ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 22017ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (!rdev->constraints) 22027ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22037ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22047ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* constraints need specific supporting methods */ 22057ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_voltage) { 22067ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_min_microvolts); 22077ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22087ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22097ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_max_microvolts); 22107ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22117ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22127ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22137ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_current_limit) { 22147ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_min_microamps); 22157ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22167ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22177ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_max_microamps); 22187ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22197ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22207ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22217ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22227ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* suspend mode constraints need multiple supporting methods */ 22237ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (!(ops->set_suspend_enable && ops->set_suspend_disable)) 22247ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22257ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22267ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_standby_state); 22277ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22287ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22297ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_mem_state); 22307ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22317ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22327ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_disk_state); 22337ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22347ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22357ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22367ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_suspend_voltage) { 22377ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22387ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_standby_microvolts); 22397ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22407ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22417ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22427ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_mem_microvolts); 22437ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22447ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22457ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22467ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_disk_microvolts); 22477ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22487ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22497ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22507ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22517ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_suspend_mode) { 22527ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22537ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_standby_mode); 22547ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22557ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22567ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22577ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_mem_mode); 22587ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22597ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22607ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22617ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_disk_mode); 22627ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22637ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22647ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22657ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22667ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22677ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell} 22687ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 2269414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2270414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register - register regulator 227169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @regulator_desc: regulator to register 227269279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @dev: struct device for the regulator 22730527100fd11d9710c7e153d791da78824b7b46faMark Brown * @init_data: platform provided init data, passed through by driver 227469279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @driver_data: private regulator data 2275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2276414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to register a regulator. 2277414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns 0 on success. 2278414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2279414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, 22800527100fd11d9710c7e153d791da78824b7b46faMark Brown struct device *dev, struct regulator_init_data *init_data, 22810527100fd11d9710c7e153d791da78824b7b46faMark Brown void *driver_data) 2282414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2283414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood static atomic_t regulator_no = ATOMIC_INIT(0); 2284414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 2285a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int ret, i; 2286414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2287414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc == NULL) 2288414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2289414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2290414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc->name == NULL || regulator_desc->ops == NULL) 2291414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2292414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2293cd78dfc6c6e321a310a73ef7b0df3d262704dd55Diego Liziero if (regulator_desc->type != REGULATOR_VOLTAGE && 2294cd78dfc6c6e321a310a73ef7b0df3d262704dd55Diego Liziero regulator_desc->type != REGULATOR_CURRENT) 2295414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2296414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 229746fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown if (!init_data) 229846fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown return ERR_PTR(-EINVAL); 229946fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown 2300414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); 2301414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 2302414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-ENOMEM); 2303414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2304414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 2305414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2306414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_init(&rdev->mutex); 2307a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->reg_data = driver_data; 2308414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->owner = regulator_desc->owner; 2309414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc = regulator_desc; 2310414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->consumer_list); 2311414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->supply_list); 2312414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->list); 2313414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->slist); 2314414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier); 2315414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2316a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* preform any regulator specific init */ 2317a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->regulator_init) { 2318a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = init_data->regulator_init(rdev->reg_data); 23194fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 23204fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 2321a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 2322a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2323a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* register with sysfs */ 2324414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->dev.class = ®ulator_class; 2325a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->dev.parent = dev; 2326812460a927c1d0dc1fbdbec9aa07de1b04043d83Kay Sievers dev_set_name(&rdev->dev, "regulator.%d", 2327812460a927c1d0dc1fbdbec9aa07de1b04043d83Kay Sievers atomic_inc_return(®ulator_no) - 1); 2328a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = device_register(&rdev->dev); 2329ad7725cb43b8badb2fec2c2bfca07c067f2e19a7Vasiliy Kulikov if (ret != 0) { 2330ad7725cb43b8badb2fec2c2bfca07c067f2e19a7Vasiliy Kulikov put_device(&rdev->dev); 23314fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 2332ad7725cb43b8badb2fec2c2bfca07c067f2e19a7Vasiliy Kulikov } 2333a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2334a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_set_drvdata(&rdev->dev, rdev); 2335a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 233674f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport /* set regulator constraints */ 233774f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport ret = set_machine_constraints(rdev, &init_data->constraints); 233874f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport if (ret < 0) 233974f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport goto scrub; 234074f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport 23417ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* add attributes supported by this regulator */ 23427ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell ret = add_regulator_attributes(rdev); 23437ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ret < 0) 23447ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell goto scrub; 23457ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 2346a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* set supply regulator if it exists */ 23470178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (init_data->supply_regulator && init_data->supply_regulator_dev) { 23480178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown dev_err(dev, 23490178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown "Supply regulator specified by both name and dev\n"); 23500178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown goto scrub; 23510178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23520178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 23530178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (init_data->supply_regulator) { 23540178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown struct regulator_dev *r; 23550178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown int found = 0; 23560178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 23570178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown list_for_each_entry(r, ®ulator_list, list) { 23580178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (strcmp(rdev_get_name(r), 23590178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown init_data->supply_regulator) == 0) { 23600178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown found = 1; 23610178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown break; 23620178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23630178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23640178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 23650178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (!found) { 23660178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown dev_err(dev, "Failed to find supply %s\n", 23670178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown init_data->supply_regulator); 23680178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown goto scrub; 23690178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23700178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 23710178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown ret = set_supply(rdev, r); 23720178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (ret < 0) 23730178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown goto scrub; 23740178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23750178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 2376a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->supply_regulator_dev) { 23770178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown dev_warn(dev, "Uses supply_regulator_dev instead of regulator_supply\n"); 2378a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_supply(rdev, 2379a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_get_drvdata(init_data->supply_regulator_dev)); 23804fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 23814fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto scrub; 2382a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 2383a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2384a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* add consumers devices */ 2385a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood for (i = 0; i < init_data->num_consumer_supplies; i++) { 2386a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_consumer_device_supply(rdev, 2387a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].dev, 238840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown init_data->consumer_supplies[i].dev_name, 2389a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].supply); 2390d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula if (ret < 0) 2391d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula goto unset_supplies; 2392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2393a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2394a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->list, ®ulator_list); 2395a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 2396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev; 23984fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 2399d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikulaunset_supplies: 2400d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula unset_regulator_supplies(rdev); 2401d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula 24024fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellscrub: 24034fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell device_unregister(&rdev->dev); 240453032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley /* device core frees rdev */ 240553032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley rdev = ERR_PTR(ret); 240653032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley goto out; 240753032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley 24084fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellclean: 24094fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell kfree(rdev); 24104fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev = ERR_PTR(ret); 24114fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto out; 2412414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2413414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register); 2414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2415414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2416414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister - unregister regulator 241769279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator to unregister 2418414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to unregister a regulator. 2420414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2421414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_unregister(struct regulator_dev *rdev) 2422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2423414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 2424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 2425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2426414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 24276bf87d17c9f5b855e9dde7b3d6f726385b966814Mark Brown WARN_ON(rdev->open_count); 24280f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport unset_regulator_supplies(rdev); 2429414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(&rdev->list); 2430414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 2431414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, "supply"); 2432414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_unregister(&rdev->dev); 2433414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2434414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2435414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister); 2436414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2437414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2438cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_suspend_prepare - prepare regulators for system wide suspend 2439414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @state: system suspend state 2440414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2441414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Configure each regulator with it's suspend operating parameters for state. 2442414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This will usually be called by machine suspend code prior to supending. 2443414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2444414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_suspend_prepare(suspend_state_t state) 2445414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2446414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 2447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 2448414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2449414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ON is handled by regulator active state */ 2450414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state == PM_SUSPEND_ON) 2451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 2452414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 2454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 2455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 2457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = suspend_prepare(rdev, state); 2458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 2459414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 2461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to prepare %s\n", 24621083c39346d482b9001944d05c09191027892226Mark Brown __func__, rdev_get_name(rdev)); 2463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 2464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 2467414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2468414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2470414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_suspend_prepare); 2471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2473ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * regulator_has_full_constraints - the system has fully specified constraints 2474ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * 2475ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * Calling this function will cause the regulator API to disable all 2476ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * regulators which have a zero use count and don't have an always_on 2477ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * constraint in a late_initcall. 2478ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * 2479ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * The intention is that this will become the default behaviour in a 2480ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * future kernel release so users are encouraged to use this facility 2481ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * now. 2482ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2483ca7255614e0861e36480103f4a402a115803d7b5Mark Brownvoid regulator_has_full_constraints(void) 2484ca7255614e0861e36480103f4a402a115803d7b5Mark Brown{ 2485ca7255614e0861e36480103f4a402a115803d7b5Mark Brown has_full_constraints = 1; 2486ca7255614e0861e36480103f4a402a115803d7b5Mark Brown} 2487ca7255614e0861e36480103f4a402a115803d7b5Mark BrownEXPORT_SYMBOL_GPL(regulator_has_full_constraints); 2488ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2489ca7255614e0861e36480103f4a402a115803d7b5Mark Brown/** 2490688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * regulator_use_dummy_regulator - Provide a dummy regulator when none is found 2491688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * 2492688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * Calling this function will cause the regulator API to provide a 2493688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * dummy regulator to consumers if no physical regulator is found, 2494688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * allowing most consumers to proceed as though a regulator were 2495688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * configured. This allows systems such as those with software 2496688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * controllable regulators for the CPU core only to be brought up more 2497688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * readily. 2498688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown */ 2499688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brownvoid regulator_use_dummy_regulator(void) 2500688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown{ 2501688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown board_wants_dummy_regulator = true; 2502688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown} 2503688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark BrownEXPORT_SYMBOL_GPL(regulator_use_dummy_regulator); 2504688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown 2505688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown/** 2506414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * rdev_get_drvdata - get rdev regulator driver data 250769279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator 2508414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2509414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get rdev regulator driver private data. This call can be used in the 2510414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator driver context. 2511414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2512414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *rdev_get_drvdata(struct regulator_dev *rdev) 2513414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2514414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->reg_data; 2515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2516414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_drvdata); 2517414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2519414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_drvdata - get regulator driver data 2520414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 2521414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2522414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get regulator driver private data. This call can be used in the consumer 2523414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * driver context when non API regulator specific functions need to be called. 2524414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2525414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *regulator_get_drvdata(struct regulator *regulator) 2526414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2527414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator->rdev->reg_data; 2528414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2529414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_drvdata); 2530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_drvdata - set regulator driver data 2533414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 2534414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @data: data 2535414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2536414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_set_drvdata(struct regulator *regulator, void *data) 2537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2538414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev->reg_data = data; 2539414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2540414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_drvdata); 2541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_id - get regulator ID 254469279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator 2545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint rdev_get_id(struct regulator_dev *rdev) 2547414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2548414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->id; 2549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2550414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_id); 2551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2552a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstruct device *rdev_get_dev(struct regulator_dev *rdev) 2553a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 2554a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return &rdev->dev; 2555a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 2556a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_dev); 2557a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2558a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodvoid *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) 2559a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 2560a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return reg_init_data->driver_data; 2561a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 2562a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_init_drvdata); 2563a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int __init regulator_init(void) 2565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 256634abbd68efe09765465b81dfedeee9994f13302fMark Brown int ret; 256734abbd68efe09765465b81dfedeee9994f13302fMark Brown 2568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_INFO "regulator: core version %s\n", REGULATOR_VERSION); 256934abbd68efe09765465b81dfedeee9994f13302fMark Brown 257034abbd68efe09765465b81dfedeee9994f13302fMark Brown ret = class_register(®ulator_class); 257134abbd68efe09765465b81dfedeee9994f13302fMark Brown 257234abbd68efe09765465b81dfedeee9994f13302fMark Brown regulator_dummy_init(); 257334abbd68efe09765465b81dfedeee9994f13302fMark Brown 257434abbd68efe09765465b81dfedeee9994f13302fMark Brown return ret; 2575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* init early to allow our consumers to complete system booting */ 2578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodcore_initcall(regulator_init); 2579ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2580ca7255614e0861e36480103f4a402a115803d7b5Mark Brownstatic int __init regulator_init_complete(void) 2581ca7255614e0861e36480103f4a402a115803d7b5Mark Brown{ 2582ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulator_dev *rdev; 2583ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulator_ops *ops; 2584ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulation_constraints *c; 2585ca7255614e0861e36480103f4a402a115803d7b5Mark Brown int enabled, ret; 2586ca7255614e0861e36480103f4a402a115803d7b5Mark Brown const char *name; 2587ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2588ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_lock(®ulator_list_mutex); 2589ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2590ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* If we have a full configuration then disable any regulators 2591ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * which are not in use or always_on. This will become the 2592ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * default behaviour in the future. 2593ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2594ca7255614e0861e36480103f4a402a115803d7b5Mark Brown list_for_each_entry(rdev, ®ulator_list, list) { 2595ca7255614e0861e36480103f4a402a115803d7b5Mark Brown ops = rdev->desc->ops; 2596ca7255614e0861e36480103f4a402a115803d7b5Mark Brown c = rdev->constraints; 2597ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 25981083c39346d482b9001944d05c09191027892226Mark Brown name = rdev_get_name(rdev); 2599ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2600f25e0b4fcc38d120e704c377791158c4b2a54daaMark Brown if (!ops->disable || (c && c->always_on)) 2601ca7255614e0861e36480103f4a402a115803d7b5Mark Brown continue; 2602ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2603ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_lock(&rdev->mutex); 2604ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2605ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (rdev->use_count) 2606ca7255614e0861e36480103f4a402a115803d7b5Mark Brown goto unlock; 2607ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2608ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* If we can't read the status assume it's on. */ 2609ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (ops->is_enabled) 2610ca7255614e0861e36480103f4a402a115803d7b5Mark Brown enabled = ops->is_enabled(rdev); 2611ca7255614e0861e36480103f4a402a115803d7b5Mark Brown else 2612ca7255614e0861e36480103f4a402a115803d7b5Mark Brown enabled = 1; 2613ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2614ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (!enabled) 2615ca7255614e0861e36480103f4a402a115803d7b5Mark Brown goto unlock; 2616ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2617ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (has_full_constraints) { 2618ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* We log since this may kill the system if it 2619ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * goes wrong. */ 2620ca7255614e0861e36480103f4a402a115803d7b5Mark Brown printk(KERN_INFO "%s: disabling %s\n", 2621ca7255614e0861e36480103f4a402a115803d7b5Mark Brown __func__, name); 2622ca7255614e0861e36480103f4a402a115803d7b5Mark Brown ret = ops->disable(rdev); 2623ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (ret != 0) { 2624ca7255614e0861e36480103f4a402a115803d7b5Mark Brown printk(KERN_ERR 2625ca7255614e0861e36480103f4a402a115803d7b5Mark Brown "%s: couldn't disable %s: %d\n", 2626ca7255614e0861e36480103f4a402a115803d7b5Mark Brown __func__, name, ret); 2627ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2628ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } else { 2629ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* The intention is that in future we will 2630ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * assume that full constraints are provided 2631ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * so warn even if we aren't going to do 2632ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * anything here. 2633ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2634ca7255614e0861e36480103f4a402a115803d7b5Mark Brown printk(KERN_WARNING 2635ca7255614e0861e36480103f4a402a115803d7b5Mark Brown "%s: incomplete constraints, leaving %s on\n", 2636ca7255614e0861e36480103f4a402a115803d7b5Mark Brown __func__, name); 2637ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2638ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2639ca7255614e0861e36480103f4a402a115803d7b5Mark Brownunlock: 2640ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_unlock(&rdev->mutex); 2641ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2642ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2643ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_unlock(®ulator_list_mutex); 2644ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2645ca7255614e0861e36480103f4a402a115803d7b5Mark Brown return 0; 2646ca7255614e0861e36480103f4a402a115803d7b5Mark Brown} 2647ca7255614e0861e36480103f4a402a115803d7b5Mark Brownlate_initcall(regulator_init_complete); 2648