core.c revision f25e0b4fcc38d120e704c377791158c4b2a54daa
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> 19414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/err.h> 20414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/mutex.h> 21414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/suspend.h> 22414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/regulator/consumer.h> 23414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/regulator/driver.h> 24414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/regulator/machine.h> 25414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 26414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#define REGULATOR_VERSION "0.5" 27414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 28414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic DEFINE_MUTEX(regulator_list_mutex); 29414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic LIST_HEAD(regulator_list); 30414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic LIST_HEAD(regulator_map_list); 31ca7255614e0861e36480103f4a402a115803d7b5Mark Brownstatic int has_full_constraints; 32414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 338dc5390d4f3fd8acc73773a56fea13544e7924dcMark Brown/* 34414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator_map 35414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 36414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Used to provide symbolic supply names to devices. 37414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 38414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_map { 39414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; 4040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *dev_name; /* The dev_name() for the consumer */ 41414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply; 42a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *regulator; 43414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 44414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 45414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* 46414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator 47414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 48414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * One for each consumer device. 49414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 50414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator { 51414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev; 52414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; 53414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA_load; 54414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uV; 55414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int max_uV; 56414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char *supply_name; 57414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute dev_attr; 58414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 59414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 60414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 61414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev); 62414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_disable(struct regulator_dev *rdev); 63414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev); 64414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev); 65414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev); 66414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 67414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data); 68414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 69414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* gets the regulator for a given consumer device */ 70414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *get_device_regulator(struct device *dev) 71414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 72414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = NULL; 73414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 74414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 75414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 76414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 77414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 78414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) { 79414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev == dev) { 80414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 81414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 82414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 83414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 84414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 85414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 86414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 87414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 88414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 89414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 90414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 91414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Platform voltage constraint check */ 92414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_voltage(struct regulator_dev *rdev, 93414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int *min_uV, int *max_uV) 94414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 95414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BUG_ON(*min_uV > *max_uV); 96414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 97414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 98414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 99414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->name); 100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 101414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) { 103414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 106414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 107414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 108414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*max_uV > rdev->constraints->max_uV) 109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *max_uV = rdev->constraints->max_uV; 110414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uV < rdev->constraints->min_uV) 111414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *min_uV = rdev->constraints->min_uV; 112414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 113414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uV > *max_uV) 114414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 115414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 116414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 117414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 118414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 119414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* current constraint check */ 120414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_current_limit(struct regulator_dev *rdev, 121414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int *min_uA, int *max_uA) 122414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 123414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BUG_ON(*min_uA > *max_uA); 124414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 126414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 127414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->name); 128414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 129414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 130414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_CURRENT)) { 131414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 132414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 133414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 134414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 135414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*max_uA > rdev->constraints->max_uA) 137414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *max_uA = rdev->constraints->max_uA; 138414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uA < rdev->constraints->min_uA) 139414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *min_uA = rdev->constraints->min_uA; 140414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 141414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uA > *max_uA) 142414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 143414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 144414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 145414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 146414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 147414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* operating mode constraint check */ 148414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_mode(struct regulator_dev *rdev, int mode) 149414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 150e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell switch (mode) { 151e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_FAST: 152e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_NORMAL: 153e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_IDLE: 154e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_STANDBY: 155e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell break; 156e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell default: 157e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell return -EINVAL; 158e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell } 159e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell 160414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 161414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 162414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->name); 163414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 164414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 165414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) { 166414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 167414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 168414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 169414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 170414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_modes_mask & mode)) { 171414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid mode %x for %s\n", 172414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, mode, rdev->desc->name); 173414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 174414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 175414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 176414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 177414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 178414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* dynamic regulator mode switching constraint check */ 179414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_drms(struct regulator_dev *rdev) 180414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 181414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 182414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 183414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->name); 184414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 185414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 186414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) { 187414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 188414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 189414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 190414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 191414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 192414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 193414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 194414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t device_requested_uA_show(struct device *dev, 195414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 196414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 197414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 198414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 199414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = get_device_regulator(dev); 200414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 201414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 202414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 203414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", regulator->uA_load); 204414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 205414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 206414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uV_show(struct device *dev, 207414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 208414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 209a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 210414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ssize_t ret; 211414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 212414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 213414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = sprintf(buf, "%d\n", _regulator_get_voltage(rdev)); 214414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 215414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 216414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 217414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2187ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(microvolts, 0444, regulator_uV_show, NULL); 219414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 220414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uA_show(struct device *dev, 221414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 222414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 223a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 224414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 225414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev)); 226414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2277ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(microamps, 0444, regulator_uA_show, NULL); 228414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 229bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brownstatic ssize_t regulator_name_show(struct device *dev, 230bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown struct device_attribute *attr, char *buf) 231bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown{ 232bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown struct regulator_dev *rdev = dev_get_drvdata(dev); 233bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown const char *name; 234bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 235b39480ac37951de126455991744c9dbb61bbb839Mark Brown if (rdev->constraints && rdev->constraints->name) 236bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown name = rdev->constraints->name; 237bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown else if (rdev->desc->name) 238bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown name = rdev->desc->name; 239bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown else 240bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown name = ""; 241bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 242bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown return sprintf(buf, "%s\n", name); 243bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown} 244bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 2454fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_print_opmode(char *buf, int mode) 246414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 247414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (mode) { 248414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_FAST: 249414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "fast\n"); 250414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_NORMAL: 251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "normal\n"); 252414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_IDLE: 253414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "idle\n"); 254414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_STANDBY: 255414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "standby\n"); 256414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 257414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 258414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 259414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2604fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_opmode_show(struct device *dev, 2614fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct device_attribute *attr, char *buf) 262414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 263a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 264414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2654fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, _regulator_get_mode(rdev)); 2664fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell} 2677ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(opmode, 0444, regulator_opmode_show, NULL); 2684fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 2694fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_print_state(char *buf, int state) 2704fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell{ 271414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state > 0) 272414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "enabled\n"); 273414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else if (state == 0) 274414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "disabled\n"); 275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 276414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 277414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 278414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2794fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_state_show(struct device *dev, 2804fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct device_attribute *attr, char *buf) 2814fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell{ 2824fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct regulator_dev *rdev = dev_get_drvdata(dev); 2834fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 2844fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, _regulator_is_enabled(rdev)); 2854fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell} 2867ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(state, 0444, regulator_state_show, NULL); 2874fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 288853116a10544206b6b2cf42ebc9d78fba2668888David Brownellstatic ssize_t regulator_status_show(struct device *dev, 289853116a10544206b6b2cf42ebc9d78fba2668888David Brownell struct device_attribute *attr, char *buf) 290853116a10544206b6b2cf42ebc9d78fba2668888David Brownell{ 291853116a10544206b6b2cf42ebc9d78fba2668888David Brownell struct regulator_dev *rdev = dev_get_drvdata(dev); 292853116a10544206b6b2cf42ebc9d78fba2668888David Brownell int status; 293853116a10544206b6b2cf42ebc9d78fba2668888David Brownell char *label; 294853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 295853116a10544206b6b2cf42ebc9d78fba2668888David Brownell status = rdev->desc->ops->get_status(rdev); 296853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (status < 0) 297853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return status; 298853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 299853116a10544206b6b2cf42ebc9d78fba2668888David Brownell switch (status) { 300853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_OFF: 301853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "off"; 302853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 303853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_ON: 304853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "on"; 305853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 306853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_ERROR: 307853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "error"; 308853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 309853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_FAST: 310853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "fast"; 311853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 312853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_NORMAL: 313853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "normal"; 314853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 315853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_IDLE: 316853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "idle"; 317853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 318853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_STANDBY: 319853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "standby"; 320853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 321853116a10544206b6b2cf42ebc9d78fba2668888David Brownell default: 322853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return -ERANGE; 323853116a10544206b6b2cf42ebc9d78fba2668888David Brownell } 324853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 325853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return sprintf(buf, "%s\n", label); 326853116a10544206b6b2cf42ebc9d78fba2668888David Brownell} 327853116a10544206b6b2cf42ebc9d78fba2668888David Brownellstatic DEVICE_ATTR(status, 0444, regulator_status_show, NULL); 328853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 329414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uA_show(struct device *dev, 330414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 331414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 332a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 333414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 334414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 335414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 336414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 337414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uA); 338414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3397ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(min_microamps, 0444, regulator_min_uA_show, NULL); 340414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 341414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uA_show(struct device *dev, 342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 344a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 345414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 346414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 347414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 348414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uA); 350414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3517ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(max_microamps, 0444, regulator_max_uA_show, NULL); 352414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uV_show(struct device *dev, 354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 355414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 356a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 357414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 358414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 359414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 360414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uV); 362414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3637ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(min_microvolts, 0444, regulator_min_uV_show, NULL); 364414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 365414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uV_show(struct device *dev, 366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 367414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 368a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 369414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 372414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uV); 374414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3757ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(max_microvolts, 0444, regulator_max_uV_show, NULL); 376414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 377414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_total_uA_show(struct device *dev, 378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 379414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 380a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 381414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 382414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA = 0; 383414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 384414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) 386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood uA += regulator->uA_load; 387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 388414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", uA); 389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3907ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL); 391414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_num_users_show(struct device *dev, 393414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 394414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 395a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->use_count); 397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 399414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_type_show(struct device *dev, 400414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 401414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 402a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 403414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 404414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (rdev->desc->type) { 405414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_VOLTAGE: 406414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "voltage\n"); 407414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_CURRENT: 408414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "current\n"); 409414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 410414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 411414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 412414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 413414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_uV_show(struct device *dev, 414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 415414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 416a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 417414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 418414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV); 419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4207ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_microvolts, 0444, 4217ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_uV_show, NULL); 422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 423414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_uV_show(struct device *dev, 424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 426a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 427414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 428414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV); 429414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4307ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_microvolts, 0444, 4317ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_uV_show, NULL); 432414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 433414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_uV_show(struct device *dev, 434414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 436a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 437414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 438414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV); 439414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4407ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_microvolts, 0444, 4417ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_uV_show, NULL); 442414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 443414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_mode_show(struct device *dev, 444414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 445414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 446a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4484fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4494fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_mem.mode); 450414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4517ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_mode, 0444, 4527ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_mode_show, NULL); 453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_mode_show(struct device *dev, 455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 457a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4594fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4604fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_disk.mode); 461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4627ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_mode, 0444, 4637ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_mode_show, NULL); 464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_mode_show(struct device *dev, 466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 467414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 468a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4704fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4714fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_standby.mode); 472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4737ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_mode, 0444, 4747ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_mode_show, NULL); 475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 476414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_state_show(struct device *dev, 477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 478414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 479a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4814fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 4824fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_mem.enabled); 483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4847ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_state, 0444, 4857ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_state_show, NULL); 486414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_state_show(struct device *dev, 488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 490a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4924fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 4934fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_disk.enabled); 494414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4957ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_state, 0444, 4967ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_state_show, NULL); 497414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_state_show(struct device *dev, 499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 500414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 501a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 502414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 5034fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 5044fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_standby.enabled); 505414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 5067ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_state, 0444, 5077ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_state_show, NULL); 5087ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 509bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 5107ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell/* 5117ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * These are the only attributes are present for all regulators. 5127ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * Other attributes are a function of regulator functionality. 5137ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 514414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct device_attribute regulator_dev_attrs[] = { 515bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown __ATTR(name, 0444, regulator_name_show, NULL), 516414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(num_users, 0444, regulator_num_users_show, NULL), 517414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(type, 0444, regulator_type_show, NULL), 518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR_NULL, 519414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 520414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 521414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void regulator_dev_release(struct device *dev) 522414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 523a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 524414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(rdev); 525414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 526414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 527414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct class regulator_class = { 528414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .name = "regulator", 529414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_release = regulator_dev_release, 530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_attrs = regulator_dev_attrs, 531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 533414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Calculate the new optimum regulator operating mode based on the new total 534414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumer load. All locks held by caller */ 535414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void drms_uA_update(struct regulator_dev *rdev) 536414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *sibling; 538414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int current_uA = 0, output_uV, input_uV, err; 539414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_drms(rdev); 542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0 || !rdev->desc->ops->get_optimum_mode || 543036de8efae4b81f8e1504fab654070cecce6dfa9Dan Carpenter !rdev->desc->ops->get_voltage || !rdev->desc->ops->set_mode) 544036de8efae4b81f8e1504fab654070cecce6dfa9Dan Carpenter return; 545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 547414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 548414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) 549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 550414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 552414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 556414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) 557414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 559414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load */ 560414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(sibling, &rdev->consumer_list, list) 561414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood current_uA += sibling->uA_load; 562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now get the optimum mode for our new total regulator load */ 564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV, 565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV, current_uA); 566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check the new mode is allowed */ 568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_mode(rdev, mode); 569414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err == 0) 570414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->ops->set_mode(rdev, mode); 571414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 572414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_set_state(struct regulator_dev *rdev, 574414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_state *rstate) 575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* enable & disable are mandatory for suspend control */ 579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_suspend_enable || 580a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood !rdev->desc->ops->set_suspend_disable) { 581a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR "%s: no way to set suspend state\n", 582a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood __func__); 583414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 584a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 585414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 586414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rstate->enabled) 587414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_enable(rdev); 588414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 589414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_disable(rdev); 590414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 591414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enabled/disable\n", __func__); 592414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 593414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 594414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 595414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) { 596414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV); 597414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 598414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set voltage\n", 599414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__); 600414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 601414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 602414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 603414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 604414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) { 605414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode); 606414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 607414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set mode\n", __func__); 608414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 609414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 610414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 611414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 612414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 613414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 614414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by caller */ 615414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state) 616414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 617414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 618414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 619414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 620414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (state) { 621414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_STANDBY: 622414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_standby); 624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MEM: 625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_mem); 627414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MAX: 628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_disk); 630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood default: 631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 632414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void print_constraints(struct regulator_dev *rdev) 636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 637414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulation_constraints *constraints = rdev->constraints; 638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char buf[80]; 639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int count; 640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->type == REGULATOR_VOLTAGE) { 642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uV == constraints->max_uV) 643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d mV ", 644414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uV / 1000); 645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d <--> %d mV ", 647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uV / 1000, 648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->max_uV / 1000); 649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } else { 650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uA == constraints->max_uA) 651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d mA ", 652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uA / 1000); 653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d <--> %d mA ", 655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uA / 1000, 656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->max_uA / 1000); 657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_FAST) 659414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "fast "); 660414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL) 661414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "normal "); 662414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE) 663414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "idle "); 664414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY) 665414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "standby"); 666414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 667414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_INFO "regulator: %s: %s\n", rdev->desc->name, buf); 668414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 669414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 670a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 671a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_machine_constraints - sets regulator constraints 67269279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator source 673c8e7e4640facbe99d10a6e262523b25be129b9b9Mark Brown * @constraints: constraints to apply 674a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 675a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Allows platform initialisation code to define and constrain 676a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator circuits e.g. valid voltage/current ranges, etc. NOTE: 677a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Constraints *must* be set by platform code in order for some 678a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator operations to proceed i.e. set_voltage, set_current_limit, 679a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_mode. 680a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 681a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_machine_constraints(struct regulator_dev *rdev, 682a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulation_constraints *constraints) 683a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 684a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int ret = 0; 685e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown const char *name; 686e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown struct regulator_ops *ops = rdev->desc->ops; 687e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown 688e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (constraints->name) 689e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown name = constraints->name; 690e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown else if (rdev->desc->name) 691e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown name = rdev->desc->name; 692e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown else 693e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown name = "regulator"; 694a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 6954367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* constrain machine-level voltage specs to fit 6964367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * the actual range supported by this regulator. 6974367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 6984367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ops->list_voltage && rdev->desc->n_voltages) { 6994367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int count = rdev->desc->n_voltages; 7004367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int i; 7014367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int min_uV = INT_MAX; 7024367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int max_uV = INT_MIN; 7034367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int cmin = constraints->min_uV; 7044367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int cmax = constraints->max_uV; 7054367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7063e59091828ed5406c879b899b4257fcef7271e2cMark Brown /* it's safe to autoconfigure fixed-voltage supplies 7073e59091828ed5406c879b899b4257fcef7271e2cMark Brown and the constraints are used by list_voltage. */ 7084367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (count == 1 && !cmin) { 7093e59091828ed5406c879b899b4257fcef7271e2cMark Brown cmin = 1; 7104367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell cmax = INT_MAX; 7113e59091828ed5406c879b899b4257fcef7271e2cMark Brown constraints->min_uV = cmin; 7123e59091828ed5406c879b899b4257fcef7271e2cMark Brown constraints->max_uV = cmax; 7134367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7144367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7153e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown /* voltage constraints are optional */ 7163e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown if ((cmin == 0) && (cmax == 0)) 7173e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown goto out; 7183e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown 7194367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* else require explicit machine-level constraints */ 7203e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown if (cmin <= 0 || cmax <= 0 || cmax < cmin) { 7214367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_err("%s: %s '%s' voltage constraints\n", 7224367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, "invalid", name); 7234367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = -EINVAL; 7244367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell goto out; 7254367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7264367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7274367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* initial: [cmin..cmax] valid, [min_uV..max_uV] not */ 7284367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell for (i = 0; i < count; i++) { 7294367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int value; 7304367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7314367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell value = ops->list_voltage(rdev, i); 7324367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value <= 0) 7334367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell continue; 7344367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7354367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* maybe adjust [min_uV..max_uV] */ 7364367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value >= cmin && value < min_uV) 7374367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell min_uV = value; 7384367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value <= cmax && value > max_uV) 7394367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell max_uV = value; 7404367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7414367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7424367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* final: [min_uV..max_uV] valid iff constraints valid */ 7434367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (max_uV < min_uV) { 7444367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_err("%s: %s '%s' voltage constraints\n", 7454367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, "unsupportable", name); 7464367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = -EINVAL; 7474367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell goto out; 7484367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7494367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7504367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* use regulator's subset of machine constraints */ 7514367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (constraints->min_uV < min_uV) { 7524367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_debug("%s: override '%s' %s, %d -> %d\n", 7534367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, name, "min_uV", 7544367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->min_uV, min_uV); 7554367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->min_uV = min_uV; 7564367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7574367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (constraints->max_uV > max_uV) { 7584367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell pr_debug("%s: override '%s' %s, %d -> %d\n", 7594367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell __func__, name, "max_uV", 7604367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->max_uV, max_uV); 7614367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->max_uV = max_uV; 7624367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7634367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7644367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 765a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints = constraints; 766a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 767a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* do we need to apply the constraint voltage */ 768a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (rdev->constraints->apply_uV && 769a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints->min_uV == rdev->constraints->max_uV && 770e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown ops->set_voltage) { 771e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown ret = ops->set_voltage(rdev, 772a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints->min_uV, rdev->constraints->max_uV); 773a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (ret < 0) { 774e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown printk(KERN_ERR "%s: failed to apply %duV constraint to %s\n", 775e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown __func__, 776e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown rdev->constraints->min_uV, name); 777a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints = NULL; 778a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 779a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 780a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 781a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 782a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* do we need to setup our suspend state */ 783e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (constraints->initial_state) { 784a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = suspend_prepare(rdev, constraints->initial_state); 785e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (ret < 0) { 786e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown printk(KERN_ERR "%s: failed to set suspend state for %s\n", 787e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown __func__, name); 788e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown rdev->constraints = NULL; 789e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown goto out; 790e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown } 791e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown } 792a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 793a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (constraints->initial_mode) { 794a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (!ops->set_mode) { 795a308466c24b4f42bab6945026e938874d22cde50Mark Brown printk(KERN_ERR "%s: no set_mode operation for %s\n", 796a308466c24b4f42bab6945026e938874d22cde50Mark Brown __func__, name); 797a308466c24b4f42bab6945026e938874d22cde50Mark Brown ret = -EINVAL; 798a308466c24b4f42bab6945026e938874d22cde50Mark Brown goto out; 799a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 800a308466c24b4f42bab6945026e938874d22cde50Mark Brown 801a308466c24b4f42bab6945026e938874d22cde50Mark Brown ret = ops->set_mode(rdev, constraints->initial_mode); 802a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (ret < 0) { 803a308466c24b4f42bab6945026e938874d22cde50Mark Brown printk(KERN_ERR 804a308466c24b4f42bab6945026e938874d22cde50Mark Brown "%s: failed to set initial mode for %s: %d\n", 805a308466c24b4f42bab6945026e938874d22cde50Mark Brown __func__, name, ret); 806a308466c24b4f42bab6945026e938874d22cde50Mark Brown goto out; 807a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 808a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 809a308466c24b4f42bab6945026e938874d22cde50Mark Brown 810cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown /* If the constraints say the regulator should be on at this point 811cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown * and we have control then make sure it is enabled. 812cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown */ 813cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown if ((constraints->always_on || constraints->boot_on) && ops->enable) { 814e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown ret = ops->enable(rdev); 815e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown if (ret < 0) { 816e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown printk(KERN_ERR "%s: failed to enable %s\n", 817e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown __func__, name); 818e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown rdev->constraints = NULL; 819e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown goto out; 820e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown } 821e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown } 822e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown 823a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood print_constraints(rdev); 824a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 825a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return ret; 826a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 827a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 828a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 829a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_supply - set regulator supply regulator 83069279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator name 83169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @supply_rdev: supply regulator name 832a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 833a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Called by platform initialisation code to set the supply regulator for this 834a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator. This ensures that a regulators supply will also be enabled by the 835a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * core if it's child is enabled. 836a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 837a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_supply(struct regulator_dev *rdev, 838a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *supply_rdev) 839a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 840a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int err; 841a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 842a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &supply_rdev->dev.kobj, 843a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "supply"); 844a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (err) { 845a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR 846a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "%s: could not add device link %s err %d\n", 847a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood __func__, supply_rdev->dev.kobj.name, err); 848a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 849a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 850a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->supply = supply_rdev; 851a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->slist, &supply_rdev->supply_list); 852a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 853a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return err; 854a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 855a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 856a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 857a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_consumer_device_supply: Bind a regulator to a symbolic supply 85869279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator source 85969279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @consumer_dev: device the supply applies to 86040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * @consumer_dev_name: dev_name() string for device supply applies to 86169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @supply: symbolic name for supply 862a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 863a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Allows platform initialisation code to map physical regulator 864a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * sources to symbolic names for supplies for use by devices. Devices 865a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * should use these symbolic names to request regulators, avoiding the 866a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * need to provide board-specific regulator names as platform data. 86740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * 86840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * Only one of consumer_dev and consumer_dev_name may be specified. 869a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 870a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_consumer_device_supply(struct regulator_dev *rdev, 87140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown struct device *consumer_dev, const char *consumer_dev_name, 87240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *supply) 873a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 874a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_map *node; 8759ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown int has_dev; 876a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 87740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (consumer_dev && consumer_dev_name) 87840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown return -EINVAL; 87940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 88040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (!consumer_dev_name && consumer_dev) 88140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown consumer_dev_name = dev_name(consumer_dev); 88240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 883a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (supply == NULL) 884a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -EINVAL; 885a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 8869ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (consumer_dev_name != NULL) 8879ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown has_dev = 1; 8889ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown else 8899ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown has_dev = 0; 8909ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown 8916001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell list_for_each_entry(node, ®ulator_map_list, list) { 89240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (consumer_dev_name != node->dev_name) 8936001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell continue; 8946001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell if (strcmp(node->supply, supply) != 0) 8956001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell continue; 8966001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell 8976001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell dev_dbg(consumer_dev, "%s/%s is '%s' supply; fail %s/%s\n", 8986001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell dev_name(&node->regulator->dev), 8996001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell node->regulator->desc->name, 9006001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell supply, 9016001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell dev_name(&rdev->dev), rdev->desc->name); 9026001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell return -EBUSY; 9036001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell } 9046001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell 9059ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown node = kzalloc(sizeof(struct regulator_map), GFP_KERNEL); 906a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (node == NULL) 907a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -ENOMEM; 908a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 909a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->regulator = rdev; 910a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->supply = supply; 911a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9129ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (has_dev) { 9139ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown node->dev_name = kstrdup(consumer_dev_name, GFP_KERNEL); 9149ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (node->dev_name == NULL) { 9159ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown kfree(node); 9169ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown return -ENOMEM; 9179ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown } 91840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown } 91940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 920a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&node->list, ®ulator_map_list); 921a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return 0; 922a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 923a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 924a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic void unset_consumer_device_supply(struct regulator_dev *rdev, 92540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *consumer_dev_name, struct device *consumer_dev) 926a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 927a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_map *node, *n; 928a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 92940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (consumer_dev && !consumer_dev_name) 93040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown consumer_dev_name = dev_name(consumer_dev); 93140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 932a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_for_each_entry_safe(node, n, ®ulator_map_list, list) { 93340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (rdev != node->regulator) 93440f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown continue; 93540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 93640f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (consumer_dev_name && node->dev_name && 93740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown strcmp(consumer_dev_name, node->dev_name)) 93840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown continue; 93940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 94040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown list_del(&node->list); 94140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown kfree(node->dev_name); 94240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown kfree(node); 94340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown return; 944a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 945a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 946a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9470f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoportstatic void unset_regulator_supplies(struct regulator_dev *rdev) 9480f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport{ 9490f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport struct regulator_map *node, *n; 9500f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport 9510f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport list_for_each_entry_safe(node, n, ®ulator_map_list, list) { 9520f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport if (rdev == node->regulator) { 9530f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport list_del(&node->list); 95440f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown kfree(node->dev_name); 9550f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport kfree(node); 9560f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport return; 9570f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport } 9580f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport } 9590f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport} 9600f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport 961414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#define REG_STR_SIZE 32 962414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 963414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *create_regulator(struct regulator_dev *rdev, 964414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev, 965414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply_name) 966414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 967414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 968414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char buf[REG_STR_SIZE]; 969414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int err, size; 970414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 971414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = kzalloc(sizeof(*regulator), GFP_KERNEL); 972414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 973414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 974414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 975414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 976414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev = rdev; 977414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_add(®ulator->list, &rdev->consumer_list); 978414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 979414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (dev) { 980414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* create a 'requested_microamps_name' sysfs entry */ 981414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "microamps_requested_%s", 982414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood supply_name); 983414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 984414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto overflow_err; 985414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 986414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev = dev; 987414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.name = kstrdup(buf, GFP_KERNEL); 988414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev_attr.attr.name == NULL) 989414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 990414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 991414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.owner = THIS_MODULE; 992414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.mode = 0444; 993414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.show = device_requested_uA_show; 994414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = device_create_file(dev, ®ulator->dev_attr); 995414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0) { 996414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING "%s: could not add regulator_dev" 997414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood " load sysfs\n", __func__); 998414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 999414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1000414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1001414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* also add a link to the device sysfs entry */ 1002414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "%s-%s", 1003414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood dev->kobj.name, supply_name); 1004414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 1005414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 1006414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1007414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->supply_name = kstrdup(buf, GFP_KERNEL); 1008414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->supply_name == NULL) 1009414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 1010414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1011414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &dev->kobj, 1012414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood buf); 1013414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err) { 1014414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING 1015414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood "%s: could not add device link %s err %d\n", 1016414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, dev->kobj.name, err); 1017414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(dev, ®ulator->dev_attr); 1018414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto link_name_err; 1019414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1020414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1021414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1022414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1023414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodlink_name_err: 1024414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 1025414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_err: 1026414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 1027414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_name_err: 1028414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 1029414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodoverflow_err: 1030414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 1031414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 1032414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1033414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 1034414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1035414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 10365ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/* Internal regulator request function */ 10375ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstatic struct regulator *_regulator_get(struct device *dev, const char *id, 10385ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown int exclusive) 1039414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1040414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1041414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_map *map; 1042414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = ERR_PTR(-ENODEV); 104340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *devname = NULL; 10445ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown int ret; 1045414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1046414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (id == NULL) { 1047414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "regulator: get() with no identifier\n"); 1048414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1049414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1050414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 105140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (dev) 105240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown devname = dev_name(dev); 105340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 1054414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1055414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1056414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(map, ®ulator_map_list, list) { 105740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown /* If the mapping has a device set up it must match */ 105840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (map->dev_name && 105940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown (!devname || strcmp(map->dev_name, devname))) 106040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown continue; 106140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 106240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (strcmp(map->supply, id) == 0) { 1063a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev = map->regulator; 1064414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto found; 1065a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1066414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1067414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1068414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1069414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1070414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodfound: 10715ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (rdev->exclusive) { 10725ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown regulator = ERR_PTR(-EPERM); 10735ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown goto out; 10745ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 10755ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 10765ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (exclusive && rdev->open_count) { 10775ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown regulator = ERR_PTR(-EBUSY); 10785ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown goto out; 10795ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 10805ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1081a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (!try_module_get(rdev->owner)) 1082a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 1083a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1084414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = create_regulator(rdev, dev, id); 1085414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) { 1086414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = ERR_PTR(-ENOMEM); 1087414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 1088414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1089414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 10905ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->open_count++; 10915ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (exclusive) { 10925ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->exclusive = 1; 10935ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 10945ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown ret = _regulator_is_enabled(rdev); 10955ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (ret > 0) 10965ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->use_count = 1; 10975ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown else 10985ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->use_count = 0; 10995ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 11005ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1101a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 1102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 11035ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 11065ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11075ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/** 11085ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator_get - lookup and obtain a reference to a regulator. 11095ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @dev: device for regulator "consumer" 11105ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @id: Supply name or regulator ID. 11115ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11125ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Returns a struct regulator corresponding to the regulator producer, 11135ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * or IS_ERR() condition containing errno. 11145ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11155ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Use of supply names configured via regulator_set_device_supply() is 11165ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * strongly encouraged. It is recommended that the supply name used 11175ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * should match the name used for the supply and/or the relevant 11185ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * device pins in the datasheet. 11195ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown */ 11205ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstruct regulator *regulator_get(struct device *dev, const char *id) 11215ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown{ 11225ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown return _regulator_get(dev, id, 0); 11235ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown} 1124414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get); 1125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1126414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 11275ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator_get_exclusive - obtain exclusive access to a regulator. 11285ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @dev: device for regulator "consumer" 11295ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @id: Supply name or regulator ID. 11305ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11315ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Returns a struct regulator corresponding to the regulator producer, 11325ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * or IS_ERR() condition containing errno. Other consumers will be 11335ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * unable to obtain this reference is held and the use count for the 11345ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator will be initialised to reflect the current state of the 11355ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator. 11365ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11375ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * This is intended for use by consumers which cannot tolerate shared 11385ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * use of the regulator such as those which need to force the 11395ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator off for correct operation of the hardware they are 11405ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * controlling. 11415ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11425ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Use of supply names configured via regulator_set_device_supply() is 11435ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * strongly encouraged. It is recommended that the supply name used 11445ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * should match the name used for the supply and/or the relevant 11455ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * device pins in the datasheet. 11465ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown */ 11475ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstruct regulator *regulator_get_exclusive(struct device *dev, const char *id) 11485ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown{ 11495ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown return _regulator_get(dev, id, 1); 11505ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown} 11515ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark BrownEXPORT_SYMBOL_GPL(regulator_get_exclusive); 11525ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11535ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/** 1154414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_put - "free" the regulator source 1155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1156414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1157414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Note: drivers must ensure that all regulator_enable calls made on this 1158414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator source are balanced by regulator_disable calls prior to calling 1159414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * this function. 1160414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1161414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_put(struct regulator *regulator) 1162414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1163414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1164414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1165414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL || IS_ERR(regulator)) 1166414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 1167414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1168414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1169414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = regulator->rdev; 1170414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1171414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* remove any sysfs entries */ 1172414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev) { 1173414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name); 1174414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 1175414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 1176414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 1177414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1178414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 1179414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 1180414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 11815ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->open_count--; 11825ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->exclusive = 0; 11835ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1184414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 1185414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1186414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1187414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_put); 1188414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1189414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_enable() */ 1190414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_enable(struct regulator_dev *rdev) 1191414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1192414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = -EINVAL; 1193414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1194414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 1195414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: %s has no constraints\n", 1196414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1197414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1198414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1199414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1200414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* do we need to enable the supply regulator first */ 1201414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) { 1202414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_enable(rdev->supply); 1203414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1204414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enable %s: %d\n", 1205414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name, ret); 1206414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1207414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1208414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1209414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1210414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check voltage and requested load before enabling */ 1211414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->enable) { 1212414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1213414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints && 1214414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood (rdev->constraints->valid_ops_mask & 1215414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood REGULATOR_CHANGE_DRMS)) 1216414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood drms_uA_update(rdev); 1217414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1218414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->enable(rdev); 1219414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1220414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enable %s: %d\n", 1221414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name, ret); 1222414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1223414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1224414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count++; 1225414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1226414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1227414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1228414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_enable - enable regulator output 1233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1234414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1235cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * Request that the regulator be enabled with the regulator output at 1236cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * the predefined voltage or current value. Calls to regulator_enable() 1237cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * must be balanced with calls to regulator_disable(). 1238cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * 1239414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: the output value can be set by other drivers, boot loader or may be 1240cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * hardwired in the regulator. 1241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1242414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_enable(struct regulator *regulator) 1243414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1244412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell struct regulator_dev *rdev = regulator->rdev; 1245412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int ret = 0; 1246414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1247412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_lock(&rdev->mutex); 1248cd94b5053081963614f6ad77b9b66a7968056c84David Brownell ret = _regulator_enable(rdev); 1249412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_unlock(&rdev->mutex); 1250414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1252414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_enable); 1253414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1254414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_disable() */ 1255414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_disable(struct regulator_dev *rdev) 1256414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1257414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1258414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1259cd94b5053081963614f6ad77b9b66a7968056c84David Brownell if (WARN(rdev->use_count <= 0, 1260cd94b5053081963614f6ad77b9b66a7968056c84David Brownell "unbalanced disables for %s\n", 1261cd94b5053081963614f6ad77b9b66a7968056c84David Brownell rdev->desc->name)) 1262cd94b5053081963614f6ad77b9b66a7968056c84David Brownell return -EIO; 1263cd94b5053081963614f6ad77b9b66a7968056c84David Brownell 1264414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* are we the last user and permitted to disable ? */ 1265414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->use_count == 1 && !rdev->constraints->always_on) { 1266414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1267414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* we are last user */ 1268414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->disable) { 1269414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1270414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1271414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to disable %s\n", 1272414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1273414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1274414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1276414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1277414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 1278414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 1279414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _regulator_disable(rdev->supply); 1280414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1281414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1282414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } else if (rdev->use_count > 1) { 1283414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1284414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints && 1285414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood (rdev->constraints->valid_ops_mask & 1286414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood REGULATOR_CHANGE_DRMS)) 1287414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood drms_uA_update(rdev); 1288414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1289414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count--; 1290414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1291414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1292414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1293414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1294414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1295414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_disable - disable regulator output 1296414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1297414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1298cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * Disable the regulator output voltage or current. Calls to 1299cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_enable() must be balanced with calls to 1300cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_disable(). 130169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * 1302414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this will only disable the regulator output if no other consumer 1303cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * devices have it enabled, the regulator device supports disabling and 1304cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * machine constraints permit this operation. 1305414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1306414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_disable(struct regulator *regulator) 1307414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1308412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell struct regulator_dev *rdev = regulator->rdev; 1309412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int ret = 0; 1310414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1311412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_lock(&rdev->mutex); 1312cd94b5053081963614f6ad77b9b66a7968056c84David Brownell ret = _regulator_disable(rdev); 1313412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_unlock(&rdev->mutex); 1314414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1315414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1316414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_disable); 1317414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1318414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_force_disable() */ 1319414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_force_disable(struct regulator_dev *rdev) 1320414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1321414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1322414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1323414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* force disable */ 1324414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->disable) { 1325414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ah well, who wants to live forever... */ 1326414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1327414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1328414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to force disable %s\n", 1329414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1330414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1331414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1332414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* notify other consumers that power has been forced off */ 1333414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE, 1334414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood NULL); 1335414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1336414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1337414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 1338414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 1339414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _regulator_disable(rdev->supply); 1340414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1341414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1345414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1346414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_force_disable - force disable regulator output 1347414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1348414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Forcibly disable the regulator output voltage or current. 1350414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this *will* disable the regulator output even if other consumer 1351414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * devices have it enabled. This should be used for situations when device 1352414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * damage will likely occur if the regulator is not disabled (e.g. over temp). 1353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_force_disable(struct regulator *regulator) 1355414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1356414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1357414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1358414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1359414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = 0; 1360414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_force_disable(regulator->rdev); 1361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1362414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1363414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1364414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_force_disable); 1365414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev) 1367414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1368414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1369414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1372414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->is_enabled) { 1374414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1375414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1376414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1377414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->is_enabled(rdev); 1379414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1380414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1381414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1382414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1383414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1384414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_is_enabled - is the regulator output enabled 1386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1388412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * Returns positive if the regulator driver backing the source/client 1389412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * has requested that the device be enabled, zero if it hasn't, else a 1390412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * negative errno code. 1391412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * 1392412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * Note that the device backing this regulator handle can have multiple 1393412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * users, so it might be enabled even if regulator_enable() was never 1394412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * called for this particular source. 1395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_is_enabled(struct regulator *regulator) 1397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_is_enabled(regulator->rdev); 1399414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1400414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_is_enabled); 1401414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1402414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 14034367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * regulator_count_voltages - count regulator_list_voltage() selectors 14044367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @regulator: regulator source 14054367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * 14064367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Returns number of selectors, or negative errno. Selectors are 14074367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * numbered starting at zero, and typically correspond to bitfields 14084367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * in hardware registers. 14094367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 14104367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownellint regulator_count_voltages(struct regulator *regulator) 14114367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell{ 14124367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_dev *rdev = regulator->rdev; 14134367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 14144367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return rdev->desc->n_voltages ? : -EINVAL; 14154367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell} 14164367cfdc7c657ad8a797f51b9ffd3c64b31910e7David BrownellEXPORT_SYMBOL_GPL(regulator_count_voltages); 14174367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 14184367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell/** 14194367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * regulator_list_voltage - enumerate supported voltages 14204367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @regulator: regulator source 14214367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @selector: identify voltage to list 14224367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Context: can sleep 14234367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * 14244367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Returns a voltage that can be passed to @regulator_set_voltage(), 14254367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * zero if this selector code can't be used on this sytem, or a 14264367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * negative errno. 14274367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 14284367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownellint regulator_list_voltage(struct regulator *regulator, unsigned selector) 14294367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell{ 14304367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_dev *rdev = regulator->rdev; 14314367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_ops *ops = rdev->desc->ops; 14324367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int ret; 14334367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 14344367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (!ops->list_voltage || selector >= rdev->desc->n_voltages) 14354367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return -EINVAL; 14364367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 14374367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell mutex_lock(&rdev->mutex); 14384367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = ops->list_voltage(rdev, selector); 14394367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell mutex_unlock(&rdev->mutex); 14404367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 14414367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ret > 0) { 14424367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ret < rdev->constraints->min_uV) 14434367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = 0; 14444367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell else if (ret > rdev->constraints->max_uV) 14454367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = 0; 14464367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 14474367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 14484367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return ret; 14494367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell} 14504367cfdc7c657ad8a797f51b9ffd3c64b31910e7David BrownellEXPORT_SYMBOL_GPL(regulator_list_voltage); 14514367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 14524367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell/** 1453a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * regulator_is_supported_voltage - check if a voltage range can be supported 1454a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * 1455a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @regulator: Regulator to check. 1456a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @min_uV: Minimum required voltage in uV. 1457a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @max_uV: Maximum required voltage in uV. 1458a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * 1459a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * Returns a boolean or a negative error code. 1460a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown */ 1461a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brownint regulator_is_supported_voltage(struct regulator *regulator, 1462a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown int min_uV, int max_uV) 1463a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown{ 1464a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown int i, voltages, ret; 1465a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1466a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown ret = regulator_count_voltages(regulator); 1467a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown if (ret < 0) 1468a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return ret; 1469a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown voltages = ret; 1470a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1471a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown for (i = 0; i < voltages; i++) { 1472a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown ret = regulator_list_voltage(regulator, i); 1473a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1474a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown if (ret >= min_uV && ret <= max_uV) 1475a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return 1; 1476a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown } 1477a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1478a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return 0; 1479a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown} 1480a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1481a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown/** 1482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_voltage - set regulator output voltage 1483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1484414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uV: Minimum required voltage in uV 1485414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uV: Maximum acceptable voltage in uV 1486414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets a voltage regulator to the desired output voltage. This can be set 1488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * during any regulator state. IOW, regulator can be disabled or enabled. 1489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the voltage will change to the new value 1491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new voltage when enabled. 1493414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1494414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is shared between several devices then the lowest 1495414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * request voltage that meets the system constraints will be used. 149669279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * Regulator system constraints must be set for this regulator before 1497414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) 1500414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1502414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1503414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1504414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1505414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1506414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1507414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_voltage) { 1508414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1509414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1510414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1511414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1512414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1513414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_voltage(rdev, &min_uV, &max_uV); 1514414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1516414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->min_uV = min_uV; 1517414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->max_uV = max_uV; 1518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV); 1519414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1520414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1521b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, NULL); 1522414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1523414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1524414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1525414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_voltage); 1526414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1527414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev) 1528414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1529414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->get_voltage) 1531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->ops->get_voltage(rdev); 1532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1533414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 1534414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1535414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1536414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_voltage - get regulator output voltage 1538414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1539414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current regulator voltage in uV. 1541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the voltage value. This 1543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1544414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_voltage(struct regulator *regulator) 1546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1547414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1548414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1550414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_get_voltage(regulator->rdev); 1552414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1556414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1557414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_voltage); 1558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1559414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1560414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_current_limit - set regulator output current limit 1561414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uA: Minimuum supported current in uA 1563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uA: Maximum supported current in uA 1564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets current sink to the desired output current. This can be set during 1566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * any regulator state. IOW, regulator can be disabled or enabled. 1567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the current will change to the new value 1569414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1570414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new current when enabled. 1571414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1572414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1574414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_current_limit(struct regulator *regulator, 1576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uA, int max_uA) 1577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1580414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1581414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1582414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1583414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1584414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_current_limit) { 1585414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1586414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1587414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1588414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1589414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1590414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_current_limit(rdev, &min_uA, &max_uA); 1591414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1592414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1593414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1594414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA); 1595414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1596414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1597414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1598414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1599414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_current_limit); 1600414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1601414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev) 1602414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1603414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1604414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1605414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1606414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1607414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1608414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_current_limit) { 1609414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1610414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1611414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1612414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1613414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_current_limit(rdev); 1614414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1615414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1616414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1617414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1618414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1619414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1620414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_current_limit - get regulator output current 1621414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1622414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current supplied by the specified current sink in uA. 1624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the current value. This 1626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1627414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_current_limit(struct regulator *regulator) 1629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_current_limit(regulator->rdev); 1631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1632414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_current_limit); 1633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_mode - set regulator operating mode 1636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1637414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @mode: operating mode - one of the REGULATOR_MODE constants 1638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Set regulator operating mode to increase regulator efficiency or improve 1640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulation performance. 1641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1644414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_mode(struct regulator *regulator, unsigned int mode) 1646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_mode) { 1654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1659414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_mode(rdev, mode); 1660414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1661414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1662414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1663414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1664414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1665414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1666414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1667414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1668414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_mode); 1669414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1670414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev) 1671414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1672414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1673414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1674414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1675414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1676414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1677414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_mode) { 1678414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1679414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1680414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1681414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1682414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_mode(rdev); 1683414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1684414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1685414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1686414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1687414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1688414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1689414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_mode - get regulator operating mode 1690414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1691414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1692414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get the current regulator operating mode. 1693414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1694414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodunsigned int regulator_get_mode(struct regulator *regulator) 1695414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1696414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_mode(regulator->rdev); 1697414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1698414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_mode); 1699414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1700414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1701414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_optimum_mode - set regulator optimum operating mode 1702414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1703414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @uA_load: load current 1704414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1705414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Notifies the regulator core of a new device load. This is then used by 1706414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS (if enabled by constraints) to set the most efficient regulator 1707414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * operating mode for the new regulator loading. 1708414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1709414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Consumer devices notify their supply regulator of the maximum power 1710414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * they will require (can be taken from device datasheet in the power 1711414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption tables) when they change operational status and hence power 1712414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * state. Examples of operational state changes that can affect power 1713414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption are :- 1714414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1715414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is opened / closed. 1716414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device I/O is about to begin or has just finished. 1717414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is idling in between work. 1718414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1719414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This information is also exported via sysfs to userspace. 1720414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1721414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS will sum the total requested load on the regulator and change 1722414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * to the most efficient operating mode if platform constraints allow. 1723414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1724414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns the new regulator mode or error. 1725414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1726414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_optimum_mode(struct regulator *regulator, int uA_load) 1727414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1728414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1729414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *consumer; 1730414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret, output_uV, input_uV, total_uA_load = 0; 1731414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 1732414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1733414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1734414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1735414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = uA_load; 1736414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_drms(rdev); 1737414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1738414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1739414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1740414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1741414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1742414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_optimum_mode) 1743414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1744414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1745414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 1746414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 1747414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) { 1748414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid output voltage found for %s\n", 1749414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1750414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1751414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1752414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1753414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 1754414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 1755414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 1756414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1757414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 1758414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) { 1759414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid input voltage found for %s\n", 1760414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1761414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1762414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1763414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1764414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load for this regulator */ 1765414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(consumer, &rdev->consumer_list, list) 1766414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load += consumer->uA_load; 1767414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1768414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, 1769414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV, output_uV, 1770414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load); 1771e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell ret = regulator_check_mode(rdev, mode); 1772e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell if (ret < 0) { 1773414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to get optimum mode for %s @" 1774414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood " %d uA %d -> %d uV\n", __func__, rdev->desc->name, 1775414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load, input_uV, output_uV); 1776414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1777414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1778414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1779414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1780e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell if (ret < 0) { 1781414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set optimum mode %x for %s\n", 1782414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, mode, rdev->desc->name); 1783414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1784414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1785414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = mode; 1786414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1787414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1788414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1789414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1790414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_optimum_mode); 1791414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1792414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1793414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register_notifier - register regulator event notifier 1794414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 179569279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @nb: notifier block 1796414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1797414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Register notifier block to receive regulator events. 1798414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1799414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_register_notifier(struct regulator *regulator, 1800414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1801414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1802414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_register(®ulator->rdev->notifier, 1803414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1804414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1805414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register_notifier); 1806414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1807414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1808414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister_notifier - unregister regulator event notifier 1809414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 181069279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @nb: notifier block 1811414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1812414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Unregister regulator event notifier block. 1813414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1814414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_unregister_notifier(struct regulator *regulator, 1815414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1816414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1817414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_unregister(®ulator->rdev->notifier, 1818414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1819414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1820414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister_notifier); 1821414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1822b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron/* notify regulator consumers and downstream regulator consumers. 1823b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron * Note mutex must be held by caller. 1824b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron */ 1825414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 1826414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 1827414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1828414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *_rdev; 1829414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1830414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* call rdev chain first */ 1831414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood blocking_notifier_call_chain(&rdev->notifier, event, NULL); 1832414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1833414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now notify regulator we supply */ 1834b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron list_for_each_entry(_rdev, &rdev->supply_list, slist) { 1835b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron mutex_lock(&_rdev->mutex); 1836b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron _notifier_call_chain(_rdev, event, data); 1837b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron mutex_unlock(&_rdev->mutex); 1838b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron } 1839414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1840414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1841414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1842414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_get - get multiple regulator consumers 1843414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1844414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @dev: Device to supply 1845414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers to register 1846414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Configuration of consumers; clients are stored here. 1847414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1848414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure. 1849414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1850414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This helper function allows drivers to get several regulator 1851414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumers in one operation. If any of the regulators cannot be 1852414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * acquired then any regulators that were allocated will be freed 1853414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * before returning to the caller. 1854414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1855414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_get(struct device *dev, int num_consumers, 1856414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1857414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1858414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1859414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1860414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1861414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 1862414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 1863414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1864414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1865414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = regulator_get(dev, 1866414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].supply); 1867414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (IS_ERR(consumers[i].consumer)) { 1868414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood dev_err(dev, "Failed to get supply '%s'\n", 1869414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].supply); 1870414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = PTR_ERR(consumers[i].consumer); 1871414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 1872414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 1873414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1874414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1875414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1876414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1877414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1878414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 1879414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers && consumers[i].consumer; i++) 1880414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 1881414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1882414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1883414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1884414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_get); 1885414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1886414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1887414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_enable - enable multiple regulator consumers 1888414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1889414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 1890414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 1891414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 1892414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1893414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to enable multiple regulator 1894414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 1895414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were enabled will be disabled again prior to 1896414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 1897414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1898414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_enable(int num_consumers, 1899414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1900414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1901414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1902414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1903414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1904414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1905414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_enable(consumers[i].consumer); 1906414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 1907414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 1908414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1909414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1910414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1911414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1912414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 1913414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "Failed to enable %s\n", consumers[i].supply); 1914414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 1915414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_disable(consumers[i].consumer); 1916414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1917414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1918414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1919414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_enable); 1920414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1921414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1922414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_disable - disable multiple regulator consumers 1923414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1924414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 1925414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 1926414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 1927414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1928414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to disable multiple regulator 1929414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 1930414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were disabled will be disabled again prior to 1931414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 1932414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1933414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_disable(int num_consumers, 1934414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1935414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1936414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1937414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1938414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1939414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1940414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_disable(consumers[i].consumer); 1941414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 1942414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 1943414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1944414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1945414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1946414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1947414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 1948414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "Failed to disable %s\n", consumers[i].supply); 1949414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 1950414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_enable(consumers[i].consumer); 1951414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1952414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1953414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1954414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_disable); 1955414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1956414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1957414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_free - free multiple regulator consumers 1958414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1959414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 1960414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 1961414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1962414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to free multiple regulator 1963414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. 1964414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1965414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_bulk_free(int num_consumers, 1966414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1967414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1968414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1969414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1970414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1971414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 1972414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 1973414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1974414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1975414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_free); 1976414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1977414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1978414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_notifier_call_chain - call regulator event notifier 197969279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator source 1980414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @event: notifier block 198169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @data: callback-specific data. 1982414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1983414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to notify clients a regulator event has 1984414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * occurred. We also notify regulator clients downstream. 1985b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron * Note lock must be held by caller. 1986414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1987414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_notifier_call_chain(struct regulator_dev *rdev, 1988414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 1989414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1990414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(rdev, event, data); 1991414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NOTIFY_DONE; 1992414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1993414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1994414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_notifier_call_chain); 1995414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1996be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown/** 1997be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * regulator_mode_to_status - convert a regulator mode into a status 1998be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * 1999be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * @mode: Mode to convert 2000be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * 2001be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * Convert a regulator mode into a status. 2002be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown */ 2003be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brownint regulator_mode_to_status(unsigned int mode) 2004be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown{ 2005be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown switch (mode) { 2006be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_FAST: 2007be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_FAST; 2008be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_NORMAL: 2009be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_NORMAL; 2010be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_IDLE: 2011be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_IDLE; 2012be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_STATUS_STANDBY: 2013be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_STANDBY; 2014be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown default: 2015be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return 0; 2016be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown } 2017be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown} 2018be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark BrownEXPORT_SYMBOL_GPL(regulator_mode_to_status); 2019be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown 20207ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell/* 20217ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * To avoid cluttering sysfs (and memory) with useless state, only 20227ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * create attributes that can be meaningfully displayed. 20237ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 20247ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic int add_regulator_attributes(struct regulator_dev *rdev) 20257ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell{ 20267ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell struct device *dev = &rdev->dev; 20277ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell struct regulator_ops *ops = rdev->desc->ops; 20287ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell int status = 0; 20297ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 20307ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* some attributes need specific methods to be displayed */ 20317ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_voltage) { 20327ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_microvolts); 20337ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20347ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20357ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 20367ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_current_limit) { 20377ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_microamps); 20387ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20397ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20407ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 20417ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_mode) { 20427ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_opmode); 20437ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20447ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20457ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 20467ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->is_enabled) { 20477ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_state); 20487ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20497ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20507ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 2051853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (ops->get_status) { 2052853116a10544206b6b2cf42ebc9d78fba2668888David Brownell status = device_create_file(dev, &dev_attr_status); 2053853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (status < 0) 2054853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return status; 2055853116a10544206b6b2cf42ebc9d78fba2668888David Brownell } 20567ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 20577ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* some attributes are type-specific */ 20587ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (rdev->desc->type == REGULATOR_CURRENT) { 20597ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_requested_microamps); 20607ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20617ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20627ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 20637ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 20647ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* all the other attributes exist to support constraints; 20657ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * don't show them if there are no constraints, or if the 20667ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * relevant supporting methods are missing. 20677ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 20687ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (!rdev->constraints) 20697ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20707ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 20717ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* constraints need specific supporting methods */ 20727ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_voltage) { 20737ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_min_microvolts); 20747ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20757ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20767ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_max_microvolts); 20777ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20787ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20797ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 20807ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_current_limit) { 20817ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_min_microamps); 20827ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20837ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20847ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_max_microamps); 20857ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20867ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20877ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 20887ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 20897ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* suspend mode constraints need multiple supporting methods */ 20907ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (!(ops->set_suspend_enable && ops->set_suspend_disable)) 20917ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20927ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 20937ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_standby_state); 20947ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20957ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20967ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_mem_state); 20977ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 20987ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 20997ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_disk_state); 21007ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21017ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21027ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 21037ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_suspend_voltage) { 21047ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 21057ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_standby_microvolts); 21067ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21077ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21087ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 21097ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_mem_microvolts); 21107ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21117ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21127ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 21137ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_disk_microvolts); 21147ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21157ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21167ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 21177ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 21187ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_suspend_mode) { 21197ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 21207ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_standby_mode); 21217ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21227ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21237ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 21247ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_mem_mode); 21257ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21267ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21277ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 21287ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_disk_mode); 21297ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21307ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21317ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 21327ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 21337ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21347ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell} 21357ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 2136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2137414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register - register regulator 213869279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @regulator_desc: regulator to register 213969279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @dev: struct device for the regulator 21400527100fd11d9710c7e153d791da78824b7b46faMark Brown * @init_data: platform provided init data, passed through by driver 214169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @driver_data: private regulator data 2142414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2143414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to register a regulator. 2144414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns 0 on success. 2145414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2146414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, 21470527100fd11d9710c7e153d791da78824b7b46faMark Brown struct device *dev, struct regulator_init_data *init_data, 21480527100fd11d9710c7e153d791da78824b7b46faMark Brown void *driver_data) 2149414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2150414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood static atomic_t regulator_no = ATOMIC_INIT(0); 2151414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 2152a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int ret, i; 2153414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2154414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc == NULL) 2155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2156414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2157414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc->name == NULL || regulator_desc->ops == NULL) 2158414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2159414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2160cd78dfc6c6e321a310a73ef7b0df3d262704dd55Diego Liziero if (regulator_desc->type != REGULATOR_VOLTAGE && 2161cd78dfc6c6e321a310a73ef7b0df3d262704dd55Diego Liziero regulator_desc->type != REGULATOR_CURRENT) 2162414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2163414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 216446fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown if (!init_data) 216546fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown return ERR_PTR(-EINVAL); 216646fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown 2167414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); 2168414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 2169414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-ENOMEM); 2170414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2171414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 2172414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2173414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_init(&rdev->mutex); 2174a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->reg_data = driver_data; 2175414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->owner = regulator_desc->owner; 2176414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc = regulator_desc; 2177414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->consumer_list); 2178414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->supply_list); 2179414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->list); 2180414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->slist); 2181414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier); 2182414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2183a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* preform any regulator specific init */ 2184a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->regulator_init) { 2185a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = init_data->regulator_init(rdev->reg_data); 21864fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 21874fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 2188a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 2189a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2190a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* register with sysfs */ 2191414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->dev.class = ®ulator_class; 2192a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->dev.parent = dev; 2193812460a927c1d0dc1fbdbec9aa07de1b04043d83Kay Sievers dev_set_name(&rdev->dev, "regulator.%d", 2194812460a927c1d0dc1fbdbec9aa07de1b04043d83Kay Sievers atomic_inc_return(®ulator_no) - 1); 2195a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = device_register(&rdev->dev); 21964fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret != 0) 21974fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 2198a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2199a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_set_drvdata(&rdev->dev, rdev); 2200a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 220174f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport /* set regulator constraints */ 220274f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport ret = set_machine_constraints(rdev, &init_data->constraints); 220374f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport if (ret < 0) 220474f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport goto scrub; 220574f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport 22067ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* add attributes supported by this regulator */ 22077ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell ret = add_regulator_attributes(rdev); 22087ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ret < 0) 22097ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell goto scrub; 22107ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 2211a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* set supply regulator if it exists */ 2212a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->supply_regulator_dev) { 2213a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_supply(rdev, 2214a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_get_drvdata(init_data->supply_regulator_dev)); 22154fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 22164fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto scrub; 2217a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 2218a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2219a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* add consumers devices */ 2220a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood for (i = 0; i < init_data->num_consumer_supplies; i++) { 2221a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_consumer_device_supply(rdev, 2222a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].dev, 222340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown init_data->consumer_supplies[i].dev_name, 2224a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].supply); 2225a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (ret < 0) { 2226a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood for (--i; i >= 0; i--) 2227a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood unset_consumer_device_supply(rdev, 222840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown init_data->consumer_supplies[i].dev_name, 222940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown init_data->consumer_supplies[i].dev); 22304fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto scrub; 2231a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 2232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2233a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2234a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->list, ®ulator_list); 2235a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 2236414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2237414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev; 22384fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 22394fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellscrub: 22404fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell device_unregister(&rdev->dev); 224153032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley /* device core frees rdev */ 224253032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley rdev = ERR_PTR(ret); 224353032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley goto out; 224453032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley 22454fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellclean: 22464fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell kfree(rdev); 22474fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev = ERR_PTR(ret); 22484fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto out; 2249414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2250414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register); 2251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2252414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2253414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister - unregister regulator 225469279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator to unregister 2255414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2256414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to unregister a regulator. 2257414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2258414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_unregister(struct regulator_dev *rdev) 2259414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2260414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 2261414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 2262414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2263414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 22646bf87d17c9f5b855e9dde7b3d6f726385b966814Mark Brown WARN_ON(rdev->open_count); 22650f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport unset_regulator_supplies(rdev); 2266414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(&rdev->list); 2267414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 2268414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, "supply"); 2269414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_unregister(&rdev->dev); 2270414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2271414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2272414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister); 2273414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2274414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2275cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_suspend_prepare - prepare regulators for system wide suspend 2276414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @state: system suspend state 2277414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2278414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Configure each regulator with it's suspend operating parameters for state. 2279414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This will usually be called by machine suspend code prior to supending. 2280414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2281414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_suspend_prepare(suspend_state_t state) 2282414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2283414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 2284414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 2285414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2286414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ON is handled by regulator active state */ 2287414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state == PM_SUSPEND_ON) 2288414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 2289414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2290414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 2291414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 2292414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2293414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 2294414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = suspend_prepare(rdev, state); 2295414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 2296414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2297414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 2298414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to prepare %s\n", 2299414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 2300414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 2301414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2302414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2303414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 2304414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2305414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2306414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2307414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_suspend_prepare); 2308414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2309414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2310ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * regulator_has_full_constraints - the system has fully specified constraints 2311ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * 2312ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * Calling this function will cause the regulator API to disable all 2313ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * regulators which have a zero use count and don't have an always_on 2314ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * constraint in a late_initcall. 2315ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * 2316ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * The intention is that this will become the default behaviour in a 2317ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * future kernel release so users are encouraged to use this facility 2318ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * now. 2319ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2320ca7255614e0861e36480103f4a402a115803d7b5Mark Brownvoid regulator_has_full_constraints(void) 2321ca7255614e0861e36480103f4a402a115803d7b5Mark Brown{ 2322ca7255614e0861e36480103f4a402a115803d7b5Mark Brown has_full_constraints = 1; 2323ca7255614e0861e36480103f4a402a115803d7b5Mark Brown} 2324ca7255614e0861e36480103f4a402a115803d7b5Mark BrownEXPORT_SYMBOL_GPL(regulator_has_full_constraints); 2325ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2326ca7255614e0861e36480103f4a402a115803d7b5Mark Brown/** 2327414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * rdev_get_drvdata - get rdev regulator driver data 232869279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator 2329414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2330414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get rdev regulator driver private data. This call can be used in the 2331414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator driver context. 2332414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2333414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *rdev_get_drvdata(struct regulator_dev *rdev) 2334414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2335414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->reg_data; 2336414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2337414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_drvdata); 2338414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2339414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2340414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_drvdata - get regulator driver data 2341414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 2342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get regulator driver private data. This call can be used in the consumer 2344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * driver context when non API regulator specific functions need to be called. 2345414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2346414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *regulator_get_drvdata(struct regulator *regulator) 2347414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2348414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator->rdev->reg_data; 2349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2350414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_drvdata); 2351414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2352414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_drvdata - set regulator driver data 2354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 2355414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @data: data 2356414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2357414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_set_drvdata(struct regulator *regulator, void *data) 2358414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2359414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev->reg_data = data; 2360414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2361414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_drvdata); 2362414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2363414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2364414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_id - get regulator ID 236569279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator 2366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2367414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint rdev_get_id(struct regulator_dev *rdev) 2368414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2369414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->id; 2370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2371414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_id); 2372414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2373a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstruct device *rdev_get_dev(struct regulator_dev *rdev) 2374a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 2375a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return &rdev->dev; 2376a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 2377a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_dev); 2378a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2379a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodvoid *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) 2380a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 2381a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return reg_init_data->driver_data; 2382a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 2383a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_init_drvdata); 2384a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int __init regulator_init(void) 2386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_INFO "regulator: core version %s\n", REGULATOR_VERSION); 2388414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return class_register(®ulator_class); 2389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2390414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2391414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* init early to allow our consumers to complete system booting */ 2392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodcore_initcall(regulator_init); 2393ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2394ca7255614e0861e36480103f4a402a115803d7b5Mark Brownstatic int __init regulator_init_complete(void) 2395ca7255614e0861e36480103f4a402a115803d7b5Mark Brown{ 2396ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulator_dev *rdev; 2397ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulator_ops *ops; 2398ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulation_constraints *c; 2399ca7255614e0861e36480103f4a402a115803d7b5Mark Brown int enabled, ret; 2400ca7255614e0861e36480103f4a402a115803d7b5Mark Brown const char *name; 2401ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2402ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_lock(®ulator_list_mutex); 2403ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2404ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* If we have a full configuration then disable any regulators 2405ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * which are not in use or always_on. This will become the 2406ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * default behaviour in the future. 2407ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2408ca7255614e0861e36480103f4a402a115803d7b5Mark Brown list_for_each_entry(rdev, ®ulator_list, list) { 2409ca7255614e0861e36480103f4a402a115803d7b5Mark Brown ops = rdev->desc->ops; 2410ca7255614e0861e36480103f4a402a115803d7b5Mark Brown c = rdev->constraints; 2411ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2412f25e0b4fcc38d120e704c377791158c4b2a54daaMark Brown if (c && c->name) 2413ca7255614e0861e36480103f4a402a115803d7b5Mark Brown name = c->name; 2414ca7255614e0861e36480103f4a402a115803d7b5Mark Brown else if (rdev->desc->name) 2415ca7255614e0861e36480103f4a402a115803d7b5Mark Brown name = rdev->desc->name; 2416ca7255614e0861e36480103f4a402a115803d7b5Mark Brown else 2417ca7255614e0861e36480103f4a402a115803d7b5Mark Brown name = "regulator"; 2418ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2419f25e0b4fcc38d120e704c377791158c4b2a54daaMark Brown if (!ops->disable || (c && c->always_on)) 2420ca7255614e0861e36480103f4a402a115803d7b5Mark Brown continue; 2421ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2422ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_lock(&rdev->mutex); 2423ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2424ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (rdev->use_count) 2425ca7255614e0861e36480103f4a402a115803d7b5Mark Brown goto unlock; 2426ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2427ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* If we can't read the status assume it's on. */ 2428ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (ops->is_enabled) 2429ca7255614e0861e36480103f4a402a115803d7b5Mark Brown enabled = ops->is_enabled(rdev); 2430ca7255614e0861e36480103f4a402a115803d7b5Mark Brown else 2431ca7255614e0861e36480103f4a402a115803d7b5Mark Brown enabled = 1; 2432ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2433ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (!enabled) 2434ca7255614e0861e36480103f4a402a115803d7b5Mark Brown goto unlock; 2435ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2436ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (has_full_constraints) { 2437ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* We log since this may kill the system if it 2438ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * goes wrong. */ 2439ca7255614e0861e36480103f4a402a115803d7b5Mark Brown printk(KERN_INFO "%s: disabling %s\n", 2440ca7255614e0861e36480103f4a402a115803d7b5Mark Brown __func__, name); 2441ca7255614e0861e36480103f4a402a115803d7b5Mark Brown ret = ops->disable(rdev); 2442ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (ret != 0) { 2443ca7255614e0861e36480103f4a402a115803d7b5Mark Brown printk(KERN_ERR 2444ca7255614e0861e36480103f4a402a115803d7b5Mark Brown "%s: couldn't disable %s: %d\n", 2445ca7255614e0861e36480103f4a402a115803d7b5Mark Brown __func__, name, ret); 2446ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2447ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } else { 2448ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* The intention is that in future we will 2449ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * assume that full constraints are provided 2450ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * so warn even if we aren't going to do 2451ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * anything here. 2452ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2453ca7255614e0861e36480103f4a402a115803d7b5Mark Brown printk(KERN_WARNING 2454ca7255614e0861e36480103f4a402a115803d7b5Mark Brown "%s: incomplete constraints, leaving %s on\n", 2455ca7255614e0861e36480103f4a402a115803d7b5Mark Brown __func__, name); 2456ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2457ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2458ca7255614e0861e36480103f4a402a115803d7b5Mark Brownunlock: 2459ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_unlock(&rdev->mutex); 2460ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2461ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2462ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_unlock(®ulator_list_mutex); 2463ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2464ca7255614e0861e36480103f4a402a115803d7b5Mark Brown return 0; 2465ca7255614e0861e36480103f4a402a115803d7b5Mark Brown} 2466ca7255614e0861e36480103f4a402a115803d7b5Mark Brownlate_initcall(regulator_init_complete); 2467