core.c revision a5766f11cfd3a0c03450d99c8fe548c2940be884
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); 31414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 32414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 33414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator_dev 34414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 35414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Voltage / Current regulator class device. One for each regulator. 36414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 37414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_dev { 38414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_desc *desc; 39414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int use_count; 40414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 41414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* lists we belong to */ 42414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; /* list of all regulators */ 43414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head slist; /* list of supplied regulators */ 44414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 45414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* lists we own */ 46414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head consumer_list; /* consumers we supply */ 47414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head supply_list; /* regulators we supply */ 48414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 49414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct blocking_notifier_head notifier; 50414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct mutex mutex; /* consumer lock */ 51414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct module *owner; 52414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device dev; 53414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulation_constraints *constraints; 54414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *supply; /* for tree */ 55414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 56414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood void *reg_data; /* regulator_dev data */ 57414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 58414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 59414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 60414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator_map 61414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 62414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Used to provide symbolic supply names to devices. 63414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 64414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_map { 65414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; 66414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev; 67414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply; 68a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *regulator; 69414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 70414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 71414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* 72414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator 73414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 74414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * One for each consumer device. 75414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 76414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator { 77414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev; 78414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; 79414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA_load; 80414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uV; 81414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int max_uV; 82414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int enabled; /* client has called enabled */ 83414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char *supply_name; 84414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute dev_attr; 85414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 86414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 87414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 88414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev); 89414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_disable(struct regulator_dev *rdev); 90414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev); 91414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev); 92414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev); 93414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 94414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data); 95414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 96414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* gets the regulator for a given consumer device */ 97414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *get_device_regulator(struct device *dev) 98414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 99414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = NULL; 100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 101414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 103414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) { 106414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev == dev) { 107414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 108414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 110414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 111414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 112414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 113414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 114414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 115414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 116414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 117414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 118414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Platform voltage constraint check */ 119414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_voltage(struct regulator_dev *rdev, 120414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int *min_uV, int *max_uV) 121414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 122414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BUG_ON(*min_uV > *max_uV); 123414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 124414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 126414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->name); 127414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 128414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 129414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) { 130414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 131414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 132414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 133414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 134414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 135414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*max_uV > rdev->constraints->max_uV) 136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *max_uV = rdev->constraints->max_uV; 137414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uV < rdev->constraints->min_uV) 138414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *min_uV = rdev->constraints->min_uV; 139414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 140414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uV > *max_uV) 141414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 142414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 143414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 144414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 145414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 146414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* current constraint check */ 147414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_current_limit(struct regulator_dev *rdev, 148414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int *min_uA, int *max_uA) 149414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 150414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BUG_ON(*min_uA > *max_uA); 151414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 152414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 153414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 154414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->name); 155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 156414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 157414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_CURRENT)) { 158414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 159414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 160414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 161414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 162414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 163414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*max_uA > rdev->constraints->max_uA) 164414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *max_uA = rdev->constraints->max_uA; 165414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uA < rdev->constraints->min_uA) 166414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *min_uA = rdev->constraints->min_uA; 167414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 168414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uA > *max_uA) 169414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 170414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 171414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 172414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 173414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 174414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* operating mode constraint check */ 175414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_mode(struct regulator_dev *rdev, int mode) 176414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 177414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 178414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 179414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->name); 180414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 181414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 182414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) { 183414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 184414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 185414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 186414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 187414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_modes_mask & mode)) { 188414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid mode %x for %s\n", 189414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, mode, rdev->desc->name); 190414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 191414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 192414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 193414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 194414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 195414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* dynamic regulator mode switching constraint check */ 196414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_drms(struct regulator_dev *rdev) 197414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 198414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 199414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 200414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->name); 201414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 202414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 203414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) { 204414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 205414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 206414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 207414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 208414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 209414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 210414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 211414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t device_requested_uA_show(struct device *dev, 212414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 213414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 214414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 215414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 216414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = get_device_regulator(dev); 217414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 218414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 219414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 220414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", regulator->uA_load); 221414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 222414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 223414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uV_show(struct device *dev, 224414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 225414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 226a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 227414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ssize_t ret; 228414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = sprintf(buf, "%d\n", _regulator_get_voltage(rdev)); 231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 234414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 235414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 236414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uA_show(struct device *dev, 237414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 238414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 239a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 240414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev)); 242414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 243414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 244414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_opmode_show(struct device *dev, 245414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 246414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 247a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 248414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int mode = _regulator_get_mode(rdev); 249414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 250414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (mode) { 251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_FAST: 252414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "fast\n"); 253414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_NORMAL: 254414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "normal\n"); 255414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_IDLE: 256414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "idle\n"); 257414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_STANDBY: 258414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "standby\n"); 259414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 260414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 261414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 262414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 263414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_state_show(struct device *dev, 264414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 265414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 266a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 267414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int state = _regulator_is_enabled(rdev); 268414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 269414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state > 0) 270414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "enabled\n"); 271414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else if (state == 0) 272414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "disabled\n"); 273414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 274414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 276414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 277414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uA_show(struct device *dev, 278414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 279414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 280a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 281414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 282414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 283414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 284414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 285414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uA); 286414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 287414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 288414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uA_show(struct device *dev, 289414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 290414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 291a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 292414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 293414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 294414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 295414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 296414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uA); 297414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 298414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 299414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uV_show(struct device *dev, 300414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 301414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 302a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 303414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 304414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 305414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 306414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 307414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uV); 308414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 309414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 310414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uV_show(struct device *dev, 311414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 312414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 313a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 314414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 315414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 316414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 317414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 318414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uV); 319414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 320414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 321414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_total_uA_show(struct device *dev, 322414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 323414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 324a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 325414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 326414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA = 0; 327414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 328414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 329414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) 330414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood uA += regulator->uA_load; 331414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 332414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", uA); 333414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 334414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 335414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_num_users_show(struct device *dev, 336414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 337414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 338a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 339414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->use_count); 340414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 341414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_type_show(struct device *dev, 343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 345a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 346414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 347414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (rdev->desc->type) { 348414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_VOLTAGE: 349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "voltage\n"); 350414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_CURRENT: 351414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "current\n"); 352414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 355414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 356414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_uV_show(struct device *dev, 357414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 358414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 359a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 360414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 362414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 363414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV); 364414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 365414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_uV_show(struct device *dev, 367414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 368414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 369a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 372414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV); 374414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 375414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 376414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_uV_show(struct device *dev, 377414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 379a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 380414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 381414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 382414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 383414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV); 384414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t suspend_opmode_show(struct regulator_dev *rdev, 387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode, char *buf) 388414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (mode) { 390414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_FAST: 391414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "fast\n"); 392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_NORMAL: 393414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "normal\n"); 394414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_IDLE: 395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "idle\n"); 396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_STANDBY: 397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "standby\n"); 398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 399414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 400414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 401414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 402414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_mode_show(struct device *dev, 403414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 404414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 405a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 406414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 407414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 408414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 409414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_opmode_show(rdev, 410414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->constraints->state_mem.mode, buf); 411414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 412414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 413414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_mode_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 if (!rdev->constraints) 419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 420414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_opmode_show(rdev, 421414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->constraints->state_disk.mode, buf); 422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 423414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_mode_show(struct device *dev, 425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 426414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 427a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 428414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 429414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 430414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 431414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_opmode_show(rdev, 432414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->constraints->state_standby.mode, buf); 433414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 434414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_state_show(struct device *dev, 436414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 437414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 438a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 439414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 440414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 441414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 442414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 443414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints->state_mem.enabled) 444414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "enabled\n"); 445414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 446414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "disabled\n"); 447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 448414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 449414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_state_show(struct device *dev, 450414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 452a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints->state_disk.enabled) 458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "enabled\n"); 459414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "disabled\n"); 461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 462414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_state_show(struct device *dev, 464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 466a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 467414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 468414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 470414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints->state_standby.enabled) 472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "enabled\n"); 473414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 474414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "disabled\n"); 475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 476414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct device_attribute regulator_dev_attrs[] = { 477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(microvolts, 0444, regulator_uV_show, NULL), 478414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(microamps, 0444, regulator_uA_show, NULL), 479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(opmode, 0444, regulator_opmode_show, NULL), 480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(state, 0444, regulator_state_show, NULL), 481414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(min_microvolts, 0444, regulator_min_uV_show, NULL), 482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(min_microamps, 0444, regulator_min_uA_show, NULL), 483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(max_microvolts, 0444, regulator_max_uV_show, NULL), 484414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(max_microamps, 0444, regulator_max_uA_show, NULL), 485414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL), 486414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(num_users, 0444, regulator_num_users_show, NULL), 487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(type, 0444, regulator_type_show, NULL), 488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_mem_microvolts, 0444, 489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_mem_uV_show, NULL), 490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_disk_microvolts, 0444, 491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_disk_uV_show, NULL), 492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_standby_microvolts, 0444, 493414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_standby_uV_show, NULL), 494414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_mem_mode, 0444, 495414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_mem_mode_show, NULL), 496414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_disk_mode, 0444, 497414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_disk_mode_show, NULL), 498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_standby_mode, 0444, 499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_standby_mode_show, NULL), 500414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_mem_state, 0444, 501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_mem_state_show, NULL), 502414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_disk_state, 0444, 503414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_disk_state_show, NULL), 504414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_standby_state, 0444, 505414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_standby_state_show, NULL), 506414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR_NULL, 507414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 508414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 509414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void regulator_dev_release(struct device *dev) 510414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 511a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 512414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(rdev); 513414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 514414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct class regulator_class = { 516414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .name = "regulator", 517414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_release = regulator_dev_release, 518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_attrs = regulator_dev_attrs, 519414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 520414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 521414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Calculate the new optimum regulator operating mode based on the new total 522414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumer load. All locks held by caller */ 523414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void drms_uA_update(struct regulator_dev *rdev) 524414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 525414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *sibling; 526414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int current_uA = 0, output_uV, input_uV, err; 527414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 528414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 529414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_drms(rdev); 530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0 || !rdev->desc->ops->get_optimum_mode || 531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood !rdev->desc->ops->get_voltage || !rdev->desc->ops->set_mode); 532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 533414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 534414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 535414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 536414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) 537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 538414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 539414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 544414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) 545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 547414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load */ 548414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(sibling, &rdev->consumer_list, list) 549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood current_uA += sibling->uA_load; 550414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now get the optimum mode for our new total regulator load */ 552414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV, 553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV, current_uA); 554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check the new mode is allowed */ 556414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_mode(rdev, mode); 557414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err == 0) 558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->ops->set_mode(rdev, mode); 559414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 560414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 561414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_set_state(struct regulator_dev *rdev, 562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_state *rstate) 563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* enable & disable are mandatory for suspend control */ 567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_suspend_enable || 568a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood !rdev->desc->ops->set_suspend_disable) { 569a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR "%s: no way to set suspend state\n", 570a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood __func__); 571414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 572a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 574414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rstate->enabled) 575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_enable(rdev); 576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_disable(rdev); 578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enabled/disable\n", __func__); 580414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 581414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 582414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 583414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) { 584414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV); 585414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 586414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set voltage\n", 587414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__); 588414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 589414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 590414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 591414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 592414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) { 593414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode); 594414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 595414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set mode\n", __func__); 596414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 597414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 598414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 599414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 600414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 601414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 602414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by caller */ 603414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state) 604414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 605414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 606414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 607414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 608414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (state) { 609414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_STANDBY: 610414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 611414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_standby); 612414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MEM: 613414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 614414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_mem); 615414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MAX: 616414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 617414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_disk); 618414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood default: 619414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 620414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 621414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 622414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void print_constraints(struct regulator_dev *rdev) 624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulation_constraints *constraints = rdev->constraints; 626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char buf[80]; 627414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int count; 628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->type == REGULATOR_VOLTAGE) { 630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uV == constraints->max_uV) 631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d mV ", 632414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uV / 1000); 633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d <--> %d mV ", 635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uV / 1000, 636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->max_uV / 1000); 637414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } else { 638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uA == constraints->max_uA) 639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d mA ", 640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uA / 1000); 641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d <--> %d mA ", 643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uA / 1000, 644414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->max_uA / 1000); 645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_FAST) 647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "fast "); 648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL) 649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "normal "); 650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE) 651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "idle "); 652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY) 653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "standby"); 654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_INFO "regulator: %s: %s\n", rdev->desc->name, buf); 656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 658a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 659a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_machine_constraints - sets regulator constraints 660a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @regulator: regulator source 661a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 662a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Allows platform initialisation code to define and constrain 663a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator circuits e.g. valid voltage/current ranges, etc. NOTE: 664a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Constraints *must* be set by platform code in order for some 665a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator operations to proceed i.e. set_voltage, set_current_limit, 666a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_mode. 667a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 668a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_machine_constraints(struct regulator_dev *rdev, 669a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulation_constraints *constraints) 670a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 671a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int ret = 0; 672a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 673a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints = constraints; 674a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 675a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* do we need to apply the constraint voltage */ 676a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (rdev->constraints->apply_uV && 677a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints->min_uV == rdev->constraints->max_uV && 678a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->desc->ops->set_voltage) { 679a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = rdev->desc->ops->set_voltage(rdev, 680a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints->min_uV, rdev->constraints->max_uV); 681a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (ret < 0) { 682a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR "%s: failed to apply %duV" 683a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood " constraint\n", __func__, 684a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints->min_uV); 685a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints = NULL; 686a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 687a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 688a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 689a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 690a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* are we enabled at boot time by firmware / bootloader */ 691a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (rdev->constraints->boot_on) 692a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->use_count = 1; 693a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 694a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* do we need to setup our suspend state */ 695a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (constraints->initial_state) 696a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = suspend_prepare(rdev, constraints->initial_state); 697a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 698a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood print_constraints(rdev); 699a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 700a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return ret; 701a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 702a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 703a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 704a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_supply - set regulator supply regulator 705a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @regulator: regulator name 706a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @supply: supply regulator name 707a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 708a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Called by platform initialisation code to set the supply regulator for this 709a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator. This ensures that a regulators supply will also be enabled by the 710a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * core if it's child is enabled. 711a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 712a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_supply(struct regulator_dev *rdev, 713a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *supply_rdev) 714a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 715a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int err; 716a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 717a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &supply_rdev->dev.kobj, 718a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "supply"); 719a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (err) { 720a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR 721a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "%s: could not add device link %s err %d\n", 722a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood __func__, supply_rdev->dev.kobj.name, err); 723a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 724a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 725a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->supply = supply_rdev; 726a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->slist, &supply_rdev->supply_list); 727a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 728a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return err; 729a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 730a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 731a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 732a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_consumer_device_supply: Bind a regulator to a symbolic supply 733a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @regulator: regulator source 734a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @dev: device the supply applies to 735a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @supply: symbolic name for supply 736a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 737a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Allows platform initialisation code to map physical regulator 738a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * sources to symbolic names for supplies for use by devices. Devices 739a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * should use these symbolic names to request regulators, avoiding the 740a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * need to provide board-specific regulator names as platform data. 741a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 742a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_consumer_device_supply(struct regulator_dev *rdev, 743a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct device *consumer_dev, const char *supply) 744a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 745a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_map *node; 746a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 747a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (supply == NULL) 748a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -EINVAL; 749a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 750a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node = kmalloc(sizeof(struct regulator_map), GFP_KERNEL); 751a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (node == NULL) 752a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -ENOMEM; 753a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 754a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->regulator = rdev; 755a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->dev = consumer_dev; 756a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->supply = supply; 757a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 758a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&node->list, ®ulator_map_list); 759a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return 0; 760a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 761a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 762a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic void unset_consumer_device_supply(struct regulator_dev *rdev, 763a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct device *consumer_dev) 764a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 765a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_map *node, *n; 766a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 767a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_for_each_entry_safe(node, n, ®ulator_map_list, list) { 768a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (rdev == node->regulator && 769a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood consumer_dev == node->dev) { 770a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_del(&node->list); 771a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood kfree(node); 772a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return; 773a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 774a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 775a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 776a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 777414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#define REG_STR_SIZE 32 778414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 779414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *create_regulator(struct regulator_dev *rdev, 780414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev, 781414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply_name) 782414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 783414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 784414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char buf[REG_STR_SIZE]; 785414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int err, size; 786414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 787414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = kzalloc(sizeof(*regulator), GFP_KERNEL); 788414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 789414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 790414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 791414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 792414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev = rdev; 793414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_add(®ulator->list, &rdev->consumer_list); 794414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 795414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (dev) { 796414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* create a 'requested_microamps_name' sysfs entry */ 797414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "microamps_requested_%s", 798414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood supply_name); 799414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 800414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto overflow_err; 801414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 802414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev = dev; 803414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.name = kstrdup(buf, GFP_KERNEL); 804414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev_attr.attr.name == NULL) 805414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 806414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 807414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.owner = THIS_MODULE; 808414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.mode = 0444; 809414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.show = device_requested_uA_show; 810414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = device_create_file(dev, ®ulator->dev_attr); 811414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0) { 812414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING "%s: could not add regulator_dev" 813414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood " load sysfs\n", __func__); 814414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 815414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 816414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 817414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* also add a link to the device sysfs entry */ 818414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "%s-%s", 819414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood dev->kobj.name, supply_name); 820414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 821414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 822414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 823414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->supply_name = kstrdup(buf, GFP_KERNEL); 824414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->supply_name == NULL) 825414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 826414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 827414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &dev->kobj, 828414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood buf); 829414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err) { 830414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING 831414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood "%s: could not add device link %s err %d\n", 832414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, dev->kobj.name, err); 833414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(dev, ®ulator->dev_attr); 834414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto link_name_err; 835414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 836414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 837414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 838414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 839414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodlink_name_err: 840414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 841414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_err: 842414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 843414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_name_err: 844414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 845414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodoverflow_err: 846414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 847414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 848414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 849414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 850414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 851414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 852414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 853414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get - lookup and obtain a reference to a regulator. 854414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @dev: device for regulator "consumer" 855414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @id: Supply name or regulator ID. 856414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 857414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns a struct regulator corresponding to the regulator producer, 858414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * or IS_ERR() condition containing errno. Use of supply names 859414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * configured via regulator_set_device_supply() is strongly 860414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * encouraged. 861414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 862414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator *regulator_get(struct device *dev, const char *id) 863414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 864414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 865414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_map *map; 866414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = ERR_PTR(-ENODEV); 867414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 868414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (id == NULL) { 869414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "regulator: get() with no identifier\n"); 870414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 871414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 872414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 873414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 874414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 875414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(map, ®ulator_map_list, list) { 876414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (dev == map->dev && 877414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood strcmp(map->supply, id) == 0) { 878a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev = map->regulator; 879414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto found; 880a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 881414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 882414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "regulator: Unable to get requested regulator: %s\n", 883414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood id); 884414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 885414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 886414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 887414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodfound: 888a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (!try_module_get(rdev->owner)) 889a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 890a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 891414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = create_regulator(rdev, dev, id); 892414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) { 893414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = ERR_PTR(-ENOMEM); 894414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 895414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 896414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 897a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 898414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 899414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 900414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 901414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get); 902414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 903414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 904414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_put - "free" the regulator source 905414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 906414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 907414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Note: drivers must ensure that all regulator_enable calls made on this 908414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator source are balanced by regulator_disable calls prior to calling 909414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * this function. 910414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 911414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_put(struct regulator *regulator) 912414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 913414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 914414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 915414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL || IS_ERR(regulator)) 916414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 917414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 918414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->enabled) { 919414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING "Releasing supply %s while enabled\n", 920414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->supply_name); 921414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood WARN_ON(regulator->enabled); 922414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_disable(regulator); 923414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 924414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 925414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 926414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = regulator->rdev; 927414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 928414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* remove any sysfs entries */ 929414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev) { 930414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name); 931414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 932414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 933414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 934414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 935414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 936414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 937414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 938414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 939414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 940414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 941414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_put); 942414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 943414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_enable() */ 944414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_enable(struct regulator_dev *rdev) 945414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 946414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = -EINVAL; 947414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 948414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 949414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: %s has no constraints\n", 950414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 951414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 952414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 953414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 954414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* do we need to enable the supply regulator first */ 955414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) { 956414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_enable(rdev->supply); 957414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 958414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enable %s: %d\n", 959414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name, ret); 960414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 961414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 962414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 963414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 964414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check voltage and requested load before enabling */ 965414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->enable) { 966414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 967414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints && 968414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood (rdev->constraints->valid_ops_mask & 969414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood REGULATOR_CHANGE_DRMS)) 970414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood drms_uA_update(rdev); 971414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 972414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->enable(rdev); 973414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 974414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enable %s: %d\n", 975414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name, ret); 976414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 977414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 978414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count++; 979414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 980414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 981414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 982414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 983414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 984414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 985414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 986414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_enable - enable regulator output 987414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 988414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 989414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Enable the regulator output at the predefined voltage or current value. 990414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: the output value can be set by other drivers, boot loader or may be 991414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * hardwired in the regulator. 992414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: calls to regulator_enable() must be balanced with calls to 993414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_disable(). 994414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 995414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_enable(struct regulator *regulator) 996414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 997414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 998414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 999414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->enabled) { 1000414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_CRIT "Regulator %s already enabled\n", 1001414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->supply_name); 1002414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood WARN_ON(regulator->enabled); 1003414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1004414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1005414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1006414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1007414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->enabled = 1; 1008414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_enable(regulator->rdev); 1009414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 1010414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->enabled = 0; 1011414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1012414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1013414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1014414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_enable); 1015414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1016414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_disable() */ 1017414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_disable(struct regulator_dev *rdev) 1018414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1019414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1020414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1021414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* are we the last user and permitted to disable ? */ 1022414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->use_count == 1 && !rdev->constraints->always_on) { 1023414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1024414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* we are last user */ 1025414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->disable) { 1026414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1027414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1028414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to disable %s\n", 1029414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1030414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1031414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1032414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1033414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1034414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 1035414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 1036414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _regulator_disable(rdev->supply); 1037414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1038414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1039414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } else if (rdev->use_count > 1) { 1040414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1041414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints && 1042414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood (rdev->constraints->valid_ops_mask & 1043414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood REGULATOR_CHANGE_DRMS)) 1044414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood drms_uA_update(rdev); 1045414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1046414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count--; 1047414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1048414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1049414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1050414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1051414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1052414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_disable - disable regulator output 1053414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1054414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1055414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Disable the regulator output voltage or current. 1056414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this will only disable the regulator output if no other consumer 1057414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * devices have it enabled. 1058414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: calls to regulator_enable() must be balanced with calls to 1059414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_disable(). 1060414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1061414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_disable(struct regulator *regulator) 1062414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1063414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1064414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1065414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!regulator->enabled) { 1066414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: not in use by this consumer\n", 1067414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__); 1068414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1069414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1070414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1071414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1072414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->enabled = 0; 1073414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = 0; 1074414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_disable(regulator->rdev); 1075414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1076414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1077414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1078414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_disable); 1079414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1080414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_force_disable() */ 1081414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_force_disable(struct regulator_dev *rdev) 1082414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1083414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1084414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1085414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* force disable */ 1086414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->disable) { 1087414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ah well, who wants to live forever... */ 1088414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1089414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1090414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to force disable %s\n", 1091414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1092414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1093414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1094414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* notify other consumers that power has been forced off */ 1095414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE, 1096414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood NULL); 1097414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1098414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1099414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 1100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 1101414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _regulator_disable(rdev->supply); 1102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1103414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1106414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1107414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1108414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_force_disable - force disable regulator output 1109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1110414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1111414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Forcibly disable the regulator output voltage or current. 1112414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this *will* disable the regulator output even if other consumer 1113414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * devices have it enabled. This should be used for situations when device 1114414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * damage will likely occur if the regulator is not disabled (e.g. over temp). 1115414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1116414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_force_disable(struct regulator *regulator) 1117414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1118414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1119414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1120414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1121414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->enabled = 0; 1122414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = 0; 1123414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_force_disable(regulator->rdev); 1124414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1126414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1127414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_force_disable); 1128414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1129414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev) 1130414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1131414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1132414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1133414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1134414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1135414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->is_enabled) { 1137414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1138414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1139414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1140414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1141414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->is_enabled(rdev); 1142414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1143414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1144414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1145414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1146414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1147414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1148414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_is_enabled - is the regulator output enabled 1149414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1150414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1151414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns zero for disabled otherwise return number of enable requests. 1152414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1153414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_is_enabled(struct regulator *regulator) 1154414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_is_enabled(regulator->rdev); 1156414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1157414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_is_enabled); 1158414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1159414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1160414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_voltage - set regulator output voltage 1161414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1162414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uV: Minimum required voltage in uV 1163414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uV: Maximum acceptable voltage in uV 1164414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1165414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets a voltage regulator to the desired output voltage. This can be set 1166414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * during any regulator state. IOW, regulator can be disabled or enabled. 1167414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1168414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the voltage will change to the new value 1169414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1170414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new voltage when enabled. 1171414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1172414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is shared between several devices then the lowest 1173414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * request voltage that meets the system constraints will be used. 1174414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1175414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1176414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1177414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) 1178414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1179414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1180414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1181414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1182414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1183414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1184414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1185414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_voltage) { 1186414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1187414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1188414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1189414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1190414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1191414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_voltage(rdev, &min_uV, &max_uV); 1192414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1193414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1194414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->min_uV = min_uV; 1195414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->max_uV = max_uV; 1196414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV); 1197414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1198414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1199414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1200414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1201414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1202414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_voltage); 1203414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1204414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev) 1205414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1206414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1207414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->get_voltage) 1208414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->ops->get_voltage(rdev); 1209414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1210414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 1211414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1212414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1213414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1214414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_voltage - get regulator output voltage 1215414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1216414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1217414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current regulator voltage in uV. 1218414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1219414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the voltage value. This 1220414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1221414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1222414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_voltage(struct regulator *regulator) 1223414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1224414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1225414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1226414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1227414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1228414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_get_voltage(regulator->rdev); 1229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1234414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_voltage); 1235414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1236414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1237414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_current_limit - set regulator output current limit 1238414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1239414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uA: Minimuum supported current in uA 1240414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uA: Maximum supported current in uA 1241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1242414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets current sink to the desired output current. This can be set during 1243414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * any regulator state. IOW, regulator can be disabled or enabled. 1244414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1245414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the current will change to the new value 1246414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1247414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new current when enabled. 1248414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1249414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1250414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1252414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_current_limit(struct regulator *regulator, 1253414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uA, int max_uA) 1254414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1255414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1256414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1257414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1258414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1259414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1260414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1261414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_current_limit) { 1262414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1263414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1264414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1265414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1266414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1267414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_current_limit(rdev, &min_uA, &max_uA); 1268414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1269414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1270414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1271414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA); 1272414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1273414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1274414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1276414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_current_limit); 1277414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1278414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev) 1279414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1280414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1281414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1282414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1283414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1284414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1285414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_current_limit) { 1286414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1287414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1288414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1289414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1290414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_current_limit(rdev); 1291414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1292414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1293414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1294414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1295414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1296414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1297414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_current_limit - get regulator output current 1298414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1299414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1300414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current supplied by the specified current sink in uA. 1301414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1302414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the current value. This 1303414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1304414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1305414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_current_limit(struct regulator *regulator) 1306414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1307414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_current_limit(regulator->rdev); 1308414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1309414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_current_limit); 1310414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1311414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1312414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_mode - set regulator operating mode 1313414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1314414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @mode: operating mode - one of the REGULATOR_MODE constants 1315414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1316414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Set regulator operating mode to increase regulator efficiency or improve 1317414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulation performance. 1318414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1319414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1320414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1321414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1322414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_mode(struct regulator *regulator, unsigned int mode) 1323414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1324414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1325414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1326414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1327414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1328414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1329414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1330414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_mode) { 1331414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1332414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1333414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1334414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1335414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1336414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_mode(rdev, mode); 1337414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1338414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1339414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1340414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1341414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1345414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_mode); 1346414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1347414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev) 1348414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1350414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1351414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1352414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_mode) { 1355414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1356414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1357414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1358414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1359414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_mode(rdev); 1360414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1362414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1363414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1364414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1365414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_mode - get regulator operating mode 1367414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1368414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1369414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get the current regulator operating mode. 1370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodunsigned int regulator_get_mode(struct regulator *regulator) 1372414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_mode(regulator->rdev); 1374414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1375414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_mode); 1376414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1377414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_optimum_mode - set regulator optimum operating mode 1379414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1380414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @uA_load: load current 1381414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1382414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Notifies the regulator core of a new device load. This is then used by 1383414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS (if enabled by constraints) to set the most efficient regulator 1384414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * operating mode for the new regulator loading. 1385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Consumer devices notify their supply regulator of the maximum power 1387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * they will require (can be taken from device datasheet in the power 1388414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption tables) when they change operational status and hence power 1389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * state. Examples of operational state changes that can affect power 1390414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption are :- 1391414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is opened / closed. 1393414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device I/O is about to begin or has just finished. 1394414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is idling in between work. 1395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This information is also exported via sysfs to userspace. 1397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS will sum the total requested load on the regulator and change 1399414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * to the most efficient operating mode if platform constraints allow. 1400414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1401414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns the new regulator mode or error. 1402414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1403414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_optimum_mode(struct regulator *regulator, int uA_load) 1404414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1405414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1406414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *consumer; 1407414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret, output_uV, input_uV, total_uA_load = 0; 1408414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 1409414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1410414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1411414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1412414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = uA_load; 1413414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_drms(rdev); 1414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1415414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1416414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1417414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1418414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_optimum_mode) 1420414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1421414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 1423414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 1424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) { 1425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid output voltage found for %s\n", 1426414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1427414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1428414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1429414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1430414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 1431414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 1432414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 1433414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1434414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 1435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) { 1436414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid input voltage found for %s\n", 1437414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1438414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1439414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1440414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1441414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load for this regulator */ 1442414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(consumer, &rdev->consumer_list, list) 1443414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load += consumer->uA_load; 1444414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1445414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, 1446414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV, output_uV, 1447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load); 1448414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret <= 0) { 1449414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to get optimum mode for %s @" 1450414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood " %d uA %d -> %d uV\n", __func__, rdev->desc->name, 1451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load, input_uV, output_uV); 1452414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret <= 0) { 1457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set optimum mode %x for %s\n", 1458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, mode, rdev->desc->name); 1459414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = mode; 1462414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1466414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_optimum_mode); 1467414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1468414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register_notifier - register regulator event notifier 1470414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @notifier_block: notifier block 1472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1473414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Register notifier block to receive regulator events. 1474414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_register_notifier(struct regulator *regulator, 1476414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1478414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_register(®ulator->rdev->notifier, 1479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1481414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register_notifier); 1482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1484414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister_notifier - unregister regulator event notifier 1485414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1486414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @notifier_block: notifier block 1487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Unregister regulator event notifier block. 1489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_unregister_notifier(struct regulator *regulator, 1491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1493414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_unregister(®ulator->rdev->notifier, 1494414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1495414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1496414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister_notifier); 1497414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* notify regulator consumers and downstream regulator consumers */ 1499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 1500414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 1501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1502414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *_rdev; 1503414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1504414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* call rdev chain first */ 1505414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1506414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood blocking_notifier_call_chain(&rdev->notifier, event, NULL); 1507414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1508414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1509414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now notify regulator we supply */ 1510414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(_rdev, &rdev->supply_list, slist) 1511414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(_rdev, event, data); 1512414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1513414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1514414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_get - get multiple regulator consumers 1516414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1517414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @dev: Device to supply 1518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers to register 1519414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Configuration of consumers; clients are stored here. 1520414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1521414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure. 1522414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1523414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This helper function allows drivers to get several regulator 1524414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumers in one operation. If any of the regulators cannot be 1525414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * acquired then any regulators that were allocated will be freed 1526414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * before returning to the caller. 1527414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1528414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_get(struct device *dev, int num_consumers, 1529414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1533414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1534414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 1535414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 1536414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1538414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = regulator_get(dev, 1539414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].supply); 1540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (IS_ERR(consumers[i].consumer)) { 1541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood dev_err(dev, "Failed to get supply '%s'\n", 1542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].supply); 1543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = PTR_ERR(consumers[i].consumer); 1544414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 1545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 1546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1547414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1548414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1550414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 1552414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers && consumers[i].consumer; i++) 1553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 1554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1556414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1557414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_get); 1558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1559414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1560414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_enable - enable multiple regulator consumers 1561414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 1563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 1564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 1565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to enable multiple regulator 1567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 1568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were enabled will be disabled again prior to 1569414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 1570414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1571414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_enable(int num_consumers, 1572414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1574414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_enable(consumers[i].consumer); 1579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 1580414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 1581414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1582414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1583414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1584414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1585414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 1586414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "Failed to enable %s\n", consumers[i].supply); 1587414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 1588414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_disable(consumers[i].consumer); 1589414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1590414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1591414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1592414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_enable); 1593414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1594414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1595414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_disable - disable multiple regulator consumers 1596414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1597414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 1598414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 1599414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 1600414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1601414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to disable multiple regulator 1602414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 1603414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were disabled will be disabled again prior to 1604414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 1605414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1606414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_disable(int num_consumers, 1607414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1608414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1609414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1610414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1611414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1612414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1613414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_disable(consumers[i].consumer); 1614414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 1615414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 1616414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1617414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1618414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1619414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1620414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 1621414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "Failed to disable %s\n", consumers[i].supply); 1622414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 1623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_enable(consumers[i].consumer); 1624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1627414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_disable); 1628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_free - free multiple regulator consumers 1631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1632414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 1633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 1634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to free multiple regulator 1636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. 1637414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_bulk_free(int num_consumers, 1639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1644414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 1645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 1646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1648414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_free); 1649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_notifier_call_chain - call regulator event notifier 1652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @event: notifier block 1654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @data: 1655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to notify clients a regulator event has 1657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * occurred. We also notify regulator clients downstream. 1658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1659414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_notifier_call_chain(struct regulator_dev *rdev, 1660414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 1661414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1662414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(rdev, event, data); 1663414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NOTIFY_DONE; 1664414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1665414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1666414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_notifier_call_chain); 1667414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1668414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1669414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register - register regulator 1670414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1671414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @reg_data: private regulator data 1672414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1673414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to register a regulator. 1674414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns 0 on success. 1675414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1676414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, 1677a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct device *dev, void *driver_data) 1678414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1679414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood static atomic_t regulator_no = ATOMIC_INIT(0); 1680414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1681a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_init_data *init_data = dev->platform_data; 1682a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int ret, i; 1683414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1684414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc == NULL) 1685414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 1686414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1687414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc->name == NULL || regulator_desc->ops == NULL) 1688414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 1689414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1690414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!regulator_desc->type == REGULATOR_VOLTAGE && 1691414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood !regulator_desc->type == REGULATOR_CURRENT) 1692414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 1693414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1694414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); 1695414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 1696414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-ENOMEM); 1697414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1698414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1699414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1700414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_init(&rdev->mutex); 1701a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->reg_data = driver_data; 1702414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->owner = regulator_desc->owner; 1703414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc = regulator_desc; 1704414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->consumer_list); 1705414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->supply_list); 1706414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->list); 1707414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->slist); 1708414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier); 1709414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1710a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* preform any regulator specific init */ 1711a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->regulator_init) { 1712a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = init_data->regulator_init(rdev->reg_data); 1713a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (ret < 0) { 1714a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood kfree(rdev); 1715a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev = ERR_PTR(ret); 1716a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 1717a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1718a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1719a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1720a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* set regulator constraints */ 1721a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_machine_constraints(rdev, &init_data->constraints); 1722a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (ret < 0) { 1723a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood kfree(rdev); 1724a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev = ERR_PTR(ret); 1725a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 1726a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1727a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1728a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* register with sysfs */ 1729414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->dev.class = ®ulator_class; 1730a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->dev.parent = dev; 1731414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood snprintf(rdev->dev.bus_id, sizeof(rdev->dev.bus_id), 1732a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "regulator.%d", atomic_inc_return(®ulator_no) - 1); 1733a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = device_register(&rdev->dev); 1734a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (ret != 0) { 1735414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(rdev); 1736414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = ERR_PTR(ret); 1737a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 1738a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1739a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1740a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_set_drvdata(&rdev->dev, rdev); 1741a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1742a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* set supply regulator if it exists */ 1743a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->supply_regulator_dev) { 1744a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_supply(rdev, 1745a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_get_drvdata(init_data->supply_regulator_dev)); 1746a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (ret < 0) { 1747a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood device_unregister(&rdev->dev); 1748a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood kfree(rdev); 1749a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev = ERR_PTR(ret); 1750a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 1751a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1752a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1753a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1754a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* add consumers devices */ 1755a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood for (i = 0; i < init_data->num_consumer_supplies; i++) { 1756a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_consumer_device_supply(rdev, 1757a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].dev, 1758a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].supply); 1759a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (ret < 0) { 1760a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood for (--i; i >= 0; i--) 1761a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood unset_consumer_device_supply(rdev, 1762a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].dev); 1763a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood device_unregister(&rdev->dev); 1764a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood kfree(rdev); 1765a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev = ERR_PTR(ret); 1766a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 1767a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1768414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1769a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1770a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->list, ®ulator_list); 1771a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 1772414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1773414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev; 1774414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1775414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register); 1776414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1777414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1778414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister - unregister regulator 1779414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1780414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1781414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to unregister a regulator. 1782414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1783414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_unregister(struct regulator_dev *rdev) 1784414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1785414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 1786414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 1787414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1788414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1789414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(&rdev->list); 1790414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 1791414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, "supply"); 1792414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_unregister(&rdev->dev); 1793414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1794414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1795414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister); 1796414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1797414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1798414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_suspend_prepare: prepare regulators for system wide suspend 1799414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @state: system suspend state 1800414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1801414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Configure each regulator with it's suspend operating parameters for state. 1802414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This will usually be called by machine suspend code prior to supending. 1803414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1804414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_suspend_prepare(suspend_state_t state) 1805414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1806414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1807414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1808414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1809414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ON is handled by regulator active state */ 1810414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state == PM_SUSPEND_ON) 1811414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 1812414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1813414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1814414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 1815414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1816414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1817414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = suspend_prepare(rdev, state); 1818414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1819414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1820414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1821414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to prepare %s\n", 1822414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1823414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1824414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1825414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1826414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1827414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1828414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1829414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1830414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_suspend_prepare); 1831414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1832414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1833414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * rdev_get_drvdata - get rdev regulator driver data 1834414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 1835414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1836414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get rdev regulator driver private data. This call can be used in the 1837414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator driver context. 1838414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1839414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *rdev_get_drvdata(struct regulator_dev *rdev) 1840414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1841414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->reg_data; 1842414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1843414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_drvdata); 1844414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1845414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1846414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_drvdata - get regulator driver data 1847414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 1848414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1849414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get regulator driver private data. This call can be used in the consumer 1850414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * driver context when non API regulator specific functions need to be called. 1851414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1852414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *regulator_get_drvdata(struct regulator *regulator) 1853414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1854414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator->rdev->reg_data; 1855414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1856414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_drvdata); 1857414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1858414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1859414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_drvdata - set regulator driver data 1860414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 1861414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @data: data 1862414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1863414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_set_drvdata(struct regulator *regulator, void *data) 1864414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1865414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev->reg_data = data; 1866414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1867414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_drvdata); 1868414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1869414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1870414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_id - get regulator ID 1871414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 1872414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1873414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint rdev_get_id(struct regulator_dev *rdev) 1874414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1875414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->id; 1876414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1877414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_id); 1878414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1879a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstruct device *rdev_get_dev(struct regulator_dev *rdev) 1880a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 1881a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return &rdev->dev; 1882a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 1883a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_dev); 1884a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1885a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodvoid *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) 1886a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 1887a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return reg_init_data->driver_data; 1888a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 1889a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_init_drvdata); 1890a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1891414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int __init regulator_init(void) 1892414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1893414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_INFO "regulator: core version %s\n", REGULATOR_VERSION); 1894414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return class_register(®ulator_class); 1895414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1896414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1897414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* init early to allow our consumers to complete system booting */ 1898414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodcore_initcall(regulator_init); 1899