core.c revision 4fca9545d17b99cdb2774716b034c62a70151bcd
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; 82412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int enabled; /* count of client enables */ 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{ 177e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell switch (mode) { 178e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_FAST: 179e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_NORMAL: 180e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_IDLE: 181e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_STANDBY: 182e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell break; 183e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell default: 184e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell return -EINVAL; 185e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell } 186e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell 187414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 188414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 189414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->name); 190414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 191414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 192414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) { 193414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 194414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 195414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 196414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 197414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_modes_mask & mode)) { 198414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid mode %x for %s\n", 199414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, mode, rdev->desc->name); 200414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 201414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 202414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 203414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 204414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 205414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* dynamic regulator mode switching constraint check */ 206414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_drms(struct regulator_dev *rdev) 207414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 208414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 209414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 210414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->name); 211414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 212414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 213414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) { 214414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 215414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 216414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 217414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 218414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 219414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 220414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 221414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t device_requested_uA_show(struct device *dev, 222414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 223414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 224414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 225414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 226414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = get_device_regulator(dev); 227414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 228414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", regulator->uA_load); 231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uV_show(struct device *dev, 234414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 235414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 236a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 237414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ssize_t ret; 238414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 239414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 240414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = sprintf(buf, "%d\n", _regulator_get_voltage(rdev)); 241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 242414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 243414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 244414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 245414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 246414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uA_show(struct device *dev, 247414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 248414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 249a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 250414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev)); 252414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 253414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 254bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brownstatic ssize_t regulator_name_show(struct device *dev, 255bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown struct device_attribute *attr, char *buf) 256bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown{ 257bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown struct regulator_dev *rdev = dev_get_drvdata(dev); 258bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown const char *name; 259bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 260bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown if (rdev->constraints->name) 261bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown name = rdev->constraints->name; 262bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown else if (rdev->desc->name) 263bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown name = rdev->desc->name; 264bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown else 265bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown name = ""; 266bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 267bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown return sprintf(buf, "%s\n", name); 268bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown} 269bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 2704fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_print_opmode(char *buf, int mode) 271414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 272414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (mode) { 273414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_FAST: 274414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "fast\n"); 275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_NORMAL: 276414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "normal\n"); 277414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_IDLE: 278414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "idle\n"); 279414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_STANDBY: 280414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "standby\n"); 281414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 282414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 283414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 284414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2854fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_opmode_show(struct device *dev, 2864fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct device_attribute *attr, char *buf) 287414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 288a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 289414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2904fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, _regulator_get_mode(rdev)); 2914fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell} 2924fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 2934fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_print_state(char *buf, int state) 2944fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell{ 295414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state > 0) 296414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "enabled\n"); 297414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else if (state == 0) 298414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "disabled\n"); 299414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 300414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 301414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 302414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 3034fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_state_show(struct device *dev, 3044fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct device_attribute *attr, char *buf) 3054fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell{ 3064fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct regulator_dev *rdev = dev_get_drvdata(dev); 3074fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 3084fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, _regulator_is_enabled(rdev)); 3094fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell} 3104fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 311414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uA_show(struct device *dev, 312414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 313414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 314a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 315414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 316414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 317414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 318414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 319414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uA); 320414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 321414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 322414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uA_show(struct device *dev, 323414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 324414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 325a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 326414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 327414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 328414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 329414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 330414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uA); 331414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 332414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 333414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uV_show(struct device *dev, 334414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 335414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 336a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 337414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 338414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 339414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 340414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 341414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uV); 342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uV_show(struct device *dev, 345414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 346414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 347a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 348414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 350414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 351414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 352414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uV); 353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 355414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_total_uA_show(struct device *dev, 356414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 357414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 358a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 359414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 360414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA = 0; 361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 362414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 363414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) 364414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood uA += regulator->uA_load; 365414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", uA); 367414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 368414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 369414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_num_users_show(struct device *dev, 370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 372a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->use_count); 374414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 375414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 376414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_type_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 switch (rdev->desc->type) { 382414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_VOLTAGE: 383414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "voltage\n"); 384414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_CURRENT: 385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "current\n"); 386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 388414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 390414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_uV_show(struct device *dev, 391414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 393a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 394414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV); 398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 399414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 400414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_uV_show(struct device *dev, 401414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 402414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 403a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 404414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 405414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 406414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 407414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV); 408414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 409414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 410414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_uV_show(struct device *dev, 411414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 412414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 413a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 415414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 416414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 417414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV); 418414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 420414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_mode_show(struct device *dev, 421414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 423a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 426414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 4274fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4284fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_mem.mode); 429414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 430414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 431414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_mode_show(struct device *dev, 432414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 433414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 434a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 436414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 437414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 4384fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4394fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_disk.mode); 440414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 441414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 442414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_mode_show(struct device *dev, 443414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 444414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 445a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 446414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 448414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 4494fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4504fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_standby.mode); 451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 452414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_state_show(struct device *dev, 454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 456a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 459414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4614fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 4624fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_mem.enabled); 463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_state_show(struct device *dev, 466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 467414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 468a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 470414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4734fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 4744fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_disk.enabled); 475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 476414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_state_show(struct device *dev, 478414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 480a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 481414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "not defined\n"); 484414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4854fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 4864fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_standby.enabled); 487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 488bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct device_attribute regulator_dev_attrs[] = { 490bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown __ATTR(name, 0444, regulator_name_show, NULL), 491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(microvolts, 0444, regulator_uV_show, NULL), 492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(microamps, 0444, regulator_uA_show, NULL), 493414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(opmode, 0444, regulator_opmode_show, NULL), 494414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(state, 0444, regulator_state_show, NULL), 495414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(min_microvolts, 0444, regulator_min_uV_show, NULL), 496414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(min_microamps, 0444, regulator_min_uA_show, NULL), 497414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(max_microvolts, 0444, regulator_max_uV_show, NULL), 498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(max_microamps, 0444, regulator_max_uA_show, NULL), 499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL), 500414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(num_users, 0444, regulator_num_users_show, NULL), 501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(type, 0444, regulator_type_show, NULL), 502414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_mem_microvolts, 0444, 503414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_mem_uV_show, NULL), 504414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_disk_microvolts, 0444, 505414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_disk_uV_show, NULL), 506414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_standby_microvolts, 0444, 507414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_standby_uV_show, NULL), 508414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_mem_mode, 0444, 509414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_mem_mode_show, NULL), 510414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_disk_mode, 0444, 511414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_disk_mode_show, NULL), 512414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_standby_mode, 0444, 513414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_standby_mode_show, NULL), 514414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_mem_state, 0444, 515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_mem_state_show, NULL), 516414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_disk_state, 0444, 517414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_disk_state_show, NULL), 518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(suspend_standby_state, 0444, 519414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_suspend_standby_state_show, NULL), 520414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR_NULL, 521414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 522414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 523414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void regulator_dev_release(struct device *dev) 524414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 525a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 526414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(rdev); 527414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 528414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 529414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct class regulator_class = { 530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .name = "regulator", 531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_release = regulator_dev_release, 532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_attrs = regulator_dev_attrs, 533414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 534414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 535414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Calculate the new optimum regulator operating mode based on the new total 536414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumer load. All locks held by caller */ 537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void drms_uA_update(struct regulator_dev *rdev) 538414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 539414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *sibling; 540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int current_uA = 0, output_uV, input_uV, err; 541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_drms(rdev); 544414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0 || !rdev->desc->ops->get_optimum_mode || 545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood !rdev->desc->ops->get_voltage || !rdev->desc->ops->set_mode); 546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 547414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 548414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 550414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) 551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 552414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 556414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 557414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) 559414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 560414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 561414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load */ 562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(sibling, &rdev->consumer_list, list) 563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood current_uA += sibling->uA_load; 564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now get the optimum mode for our new total regulator load */ 566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV, 567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV, current_uA); 568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 569414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check the new mode is allowed */ 570414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_mode(rdev, mode); 571414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err == 0) 572414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->ops->set_mode(rdev, mode); 573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 574414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_set_state(struct regulator_dev *rdev, 576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_state *rstate) 577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 580414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* enable & disable are mandatory for suspend control */ 581414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_suspend_enable || 582a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood !rdev->desc->ops->set_suspend_disable) { 583a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR "%s: no way to set suspend state\n", 584a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood __func__); 585414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 586a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 587414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 588414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rstate->enabled) 589414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_enable(rdev); 590414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 591414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_disable(rdev); 592414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 593414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enabled/disable\n", __func__); 594414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 595414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 596414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 597414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) { 598414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV); 599414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 600414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set voltage\n", 601414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__); 602414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 603414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 604414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 605414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 606414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) { 607414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode); 608414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 609414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set mode\n", __func__); 610414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 611414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 612414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 613414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 614414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 615414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 616414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by caller */ 617414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state) 618414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 619414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 620414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 621414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 622414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (state) { 623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_STANDBY: 624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_standby); 626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MEM: 627414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_mem); 629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MAX: 630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_disk); 632414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood default: 633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 637414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void print_constraints(struct regulator_dev *rdev) 638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulation_constraints *constraints = rdev->constraints; 640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char buf[80]; 641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int count; 642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->type == REGULATOR_VOLTAGE) { 644414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uV == constraints->max_uV) 645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d mV ", 646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uV / 1000); 647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d <--> %d mV ", 649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uV / 1000, 650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->max_uV / 1000); 651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } else { 652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uA == constraints->max_uA) 653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d mA ", 654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uA / 1000); 655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count = sprintf(buf, "%d <--> %d mA ", 657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->min_uA / 1000, 658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood constraints->max_uA / 1000); 659414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 660414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_FAST) 661414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "fast "); 662414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL) 663414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "normal "); 664414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE) 665414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "idle "); 666414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY) 667414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "standby"); 668414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 669414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_INFO "regulator: %s: %s\n", rdev->desc->name, buf); 670414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 671414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 672a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 673a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_machine_constraints - sets regulator constraints 674a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @regulator: regulator source 675a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 676a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Allows platform initialisation code to define and constrain 677a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator circuits e.g. valid voltage/current ranges, etc. NOTE: 678a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Constraints *must* be set by platform code in order for some 679a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator operations to proceed i.e. set_voltage, set_current_limit, 680a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_mode. 681a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 682a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_machine_constraints(struct regulator_dev *rdev, 683a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulation_constraints *constraints) 684a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 685a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int ret = 0; 686e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown const char *name; 687e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown struct regulator_ops *ops = rdev->desc->ops; 688e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown 689e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (constraints->name) 690e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown name = constraints->name; 691e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown else if (rdev->desc->name) 692e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown name = rdev->desc->name; 693e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown else 694e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown name = "regulator"; 695a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 696a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints = constraints; 697a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 698a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* do we need to apply the constraint voltage */ 699a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (rdev->constraints->apply_uV && 700a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints->min_uV == rdev->constraints->max_uV && 701e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown ops->set_voltage) { 702e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown ret = ops->set_voltage(rdev, 703a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints->min_uV, rdev->constraints->max_uV); 704a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (ret < 0) { 705e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown printk(KERN_ERR "%s: failed to apply %duV constraint to %s\n", 706e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown __func__, 707e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown rdev->constraints->min_uV, name); 708a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->constraints = NULL; 709a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 710a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 711a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 712a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 713a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* are we enabled at boot time by firmware / bootloader */ 714a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (rdev->constraints->boot_on) 715a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->use_count = 1; 716a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 717a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* do we need to setup our suspend state */ 718e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (constraints->initial_state) { 719a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = suspend_prepare(rdev, constraints->initial_state); 720e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (ret < 0) { 721e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown printk(KERN_ERR "%s: failed to set suspend state for %s\n", 722e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown __func__, name); 723e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown rdev->constraints = NULL; 724e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown goto out; 725e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown } 726e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown } 727a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 728e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown /* if always_on is set then turn the regulator on if it's not 729e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown * already on. */ 730e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown if (constraints->always_on && ops->enable && 731e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown ((ops->is_enabled && !ops->is_enabled(rdev)) || 732e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown (!ops->is_enabled && !constraints->boot_on))) { 733e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown ret = ops->enable(rdev); 734e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown if (ret < 0) { 735e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown printk(KERN_ERR "%s: failed to enable %s\n", 736e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown __func__, name); 737e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown rdev->constraints = NULL; 738e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown goto out; 739e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown } 740e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown } 741e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown 742a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood print_constraints(rdev); 743a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 744a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return ret; 745a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 746a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 747a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 748a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_supply - set regulator supply regulator 749a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @regulator: regulator name 750a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @supply: supply regulator name 751a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 752a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Called by platform initialisation code to set the supply regulator for this 753a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator. This ensures that a regulators supply will also be enabled by the 754a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * core if it's child is enabled. 755a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 756a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_supply(struct regulator_dev *rdev, 757a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *supply_rdev) 758a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 759a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int err; 760a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 761a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &supply_rdev->dev.kobj, 762a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "supply"); 763a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (err) { 764a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood printk(KERN_ERR 765a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "%s: could not add device link %s err %d\n", 766a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood __func__, supply_rdev->dev.kobj.name, err); 767a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 768a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 769a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->supply = supply_rdev; 770a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->slist, &supply_rdev->supply_list); 771a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 772a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return err; 773a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 774a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 775a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 776a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_consumer_device_supply: Bind a regulator to a symbolic supply 777a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @regulator: regulator source 778a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @dev: device the supply applies to 779a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * @supply: symbolic name for supply 780a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 781a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Allows platform initialisation code to map physical regulator 782a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * sources to symbolic names for supplies for use by devices. Devices 783a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * should use these symbolic names to request regulators, avoiding the 784a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * need to provide board-specific regulator names as platform data. 785a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 786a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_consumer_device_supply(struct regulator_dev *rdev, 787a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct device *consumer_dev, const char *supply) 788a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 789a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_map *node; 790a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 791a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (supply == NULL) 792a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -EINVAL; 793a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 794a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node = kmalloc(sizeof(struct regulator_map), GFP_KERNEL); 795a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (node == NULL) 796a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -ENOMEM; 797a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 798a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->regulator = rdev; 799a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->dev = consumer_dev; 800a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->supply = supply; 801a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 802a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&node->list, ®ulator_map_list); 803a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return 0; 804a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 805a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 806a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic void unset_consumer_device_supply(struct regulator_dev *rdev, 807a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct device *consumer_dev) 808a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 809a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_map *node, *n; 810a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 811a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_for_each_entry_safe(node, n, ®ulator_map_list, list) { 812a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (rdev == node->regulator && 813a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood consumer_dev == node->dev) { 814a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_del(&node->list); 815a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood kfree(node); 816a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return; 817a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 818a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 819a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 820a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 821414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#define REG_STR_SIZE 32 822414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 823414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *create_regulator(struct regulator_dev *rdev, 824414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev, 825414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply_name) 826414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 827414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 828414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char buf[REG_STR_SIZE]; 829414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int err, size; 830414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 831414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = kzalloc(sizeof(*regulator), GFP_KERNEL); 832414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 833414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 834414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 835414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 836414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev = rdev; 837414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_add(®ulator->list, &rdev->consumer_list); 838414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 839414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (dev) { 840414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* create a 'requested_microamps_name' sysfs entry */ 841414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "microamps_requested_%s", 842414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood supply_name); 843414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 844414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto overflow_err; 845414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 846414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev = dev; 847414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.name = kstrdup(buf, GFP_KERNEL); 848414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev_attr.attr.name == NULL) 849414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 850414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 851414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.owner = THIS_MODULE; 852414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.mode = 0444; 853414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.show = device_requested_uA_show; 854414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = device_create_file(dev, ®ulator->dev_attr); 855414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0) { 856414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING "%s: could not add regulator_dev" 857414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood " load sysfs\n", __func__); 858414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 859414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 860414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 861414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* also add a link to the device sysfs entry */ 862414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "%s-%s", 863414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood dev->kobj.name, supply_name); 864414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 865414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 866414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 867414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->supply_name = kstrdup(buf, GFP_KERNEL); 868414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->supply_name == NULL) 869414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 870414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 871414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &dev->kobj, 872414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood buf); 873414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err) { 874414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_WARNING 875414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood "%s: could not add device link %s err %d\n", 876414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, dev->kobj.name, err); 877414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(dev, ®ulator->dev_attr); 878414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto link_name_err; 879414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 880414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 881414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 882414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 883414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodlink_name_err: 884414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 885414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_err: 886414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 887414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_name_err: 888414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 889414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodoverflow_err: 890414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 891414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 892414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 893414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 894414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 895414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 896414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 897414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get - lookup and obtain a reference to a regulator. 898414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @dev: device for regulator "consumer" 899414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @id: Supply name or regulator ID. 900414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 901414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns a struct regulator corresponding to the regulator producer, 902414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * or IS_ERR() condition containing errno. Use of supply names 903414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * configured via regulator_set_device_supply() is strongly 904414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * encouraged. 905414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 906414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator *regulator_get(struct device *dev, const char *id) 907414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 908414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 909414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_map *map; 910414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = ERR_PTR(-ENODEV); 911414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 912414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (id == NULL) { 913414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "regulator: get() with no identifier\n"); 914414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 915414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 916414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 917414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 918414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 919414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(map, ®ulator_map_list, list) { 920414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (dev == map->dev && 921414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood strcmp(map->supply, id) == 0) { 922a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev = map->regulator; 923414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto found; 924a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 925414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 926414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "regulator: Unable to get requested regulator: %s\n", 927414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood id); 928414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 929414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 930414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 931414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodfound: 932a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (!try_module_get(rdev->owner)) 933a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 934a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 935414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = create_regulator(rdev, dev, id); 936414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) { 937414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = ERR_PTR(-ENOMEM); 938414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 939414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 940414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 941a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 942414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 943414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 944414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 945414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get); 946414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 947414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 948414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_put - "free" the regulator source 949414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 950414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 951414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Note: drivers must ensure that all regulator_enable calls made on this 952414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator source are balanced by regulator_disable calls prior to calling 953414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * this function. 954414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 955414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_put(struct regulator *regulator) 956414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 957414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 958414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 959414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL || IS_ERR(regulator)) 960414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 961414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 962414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 963414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = regulator->rdev; 964414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 965412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell if (WARN(regulator->enabled, "Releasing supply %s while enabled\n", 966412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell regulator->supply_name)) 967412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell _regulator_disable(rdev); 968412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell 969414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* remove any sysfs entries */ 970414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev) { 971414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name); 972414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 973414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 974414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 975414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 976414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 977414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 978414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 979414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 980414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 981414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 982414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_put); 983414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 984414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_enable() */ 985414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_enable(struct regulator_dev *rdev) 986414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 987414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = -EINVAL; 988414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 989414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 990414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: %s has no constraints\n", 991414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 992414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 993414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 994414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 995414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* do we need to enable the supply regulator first */ 996414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) { 997414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_enable(rdev->supply); 998414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 999414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enable %s: %d\n", 1000414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name, ret); 1001414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1002414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1003414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1004414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1005414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check voltage and requested load before enabling */ 1006414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->enable) { 1007414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1008414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints && 1009414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood (rdev->constraints->valid_ops_mask & 1010414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood REGULATOR_CHANGE_DRMS)) 1011414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood drms_uA_update(rdev); 1012414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1013414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->enable(rdev); 1014414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1015414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to enable %s: %d\n", 1016414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name, ret); 1017414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1018414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1019414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count++; 1020414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1021414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1022414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1023414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1024414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1025414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1026414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1027414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_enable - enable regulator output 1028414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1029414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1030414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Enable the regulator output at the predefined voltage or current value. 1031414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: the output value can be set by other drivers, boot loader or may be 1032414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * hardwired in the regulator. 1033414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: calls to regulator_enable() must be balanced with calls to 1034414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_disable(). 1035414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1036414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_enable(struct regulator *regulator) 1037414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1038412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell struct regulator_dev *rdev = regulator->rdev; 1039412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int ret = 0; 1040414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1041412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_lock(&rdev->mutex); 1042412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell if (regulator->enabled == 0) 1043412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell ret = _regulator_enable(rdev); 1044412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell else if (regulator->enabled < 0) 1045412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell ret = -EIO; 1046412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell if (ret == 0) 1047412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell regulator->enabled++; 1048412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_unlock(&rdev->mutex); 1049414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1050414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1051414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_enable); 1052414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1053414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_disable() */ 1054414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_disable(struct regulator_dev *rdev) 1055414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1056414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1057414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1058414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* are we the last user and permitted to disable ? */ 1059414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->use_count == 1 && !rdev->constraints->always_on) { 1060414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1061414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* we are last user */ 1062414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->disable) { 1063414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1064414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1065414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to disable %s\n", 1066414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1067414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1068414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1069414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1070414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1071414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 1072414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 1073414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _regulator_disable(rdev->supply); 1074414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1075414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1076414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } else if (rdev->use_count > 1) { 1077414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1078414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints && 1079414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood (rdev->constraints->valid_ops_mask & 1080414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood REGULATOR_CHANGE_DRMS)) 1081414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood drms_uA_update(rdev); 1082414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1083414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count--; 1084414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1085414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1086414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1087414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1088414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1089414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_disable - disable regulator output 1090414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1091414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1092414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Disable the regulator output voltage or current. 1093414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this will only disable the regulator output if no other consumer 1094414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * devices have it enabled. 1095414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: calls to regulator_enable() must be balanced with calls to 1096414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_disable(). 1097414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1098414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_disable(struct regulator *regulator) 1099414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1100412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell struct regulator_dev *rdev = regulator->rdev; 1101412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int ret = 0; 1102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1103412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_lock(&rdev->mutex); 1104412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell if (regulator->enabled == 1) { 1105412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell ret = _regulator_disable(rdev); 1106412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell if (ret == 0) 1107412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell regulator->uA_load = 0; 1108412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell } else if (WARN(regulator->enabled <= 0, 1109412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell "unbalanced disables for supply %s\n", 1110412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell regulator->supply_name)) 1111412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell ret = -EIO; 1112412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell if (ret == 0) 1113412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell regulator->enabled--; 1114412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_unlock(&rdev->mutex); 1115414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1116414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1117414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_disable); 1118414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1119414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_force_disable() */ 1120414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_force_disable(struct regulator_dev *rdev) 1121414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1122414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1123414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1124414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* force disable */ 1125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->disable) { 1126414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ah well, who wants to live forever... */ 1127414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1128414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1129414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to force disable %s\n", 1130414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1131414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1132414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1133414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* notify other consumers that power has been forced off */ 1134414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE, 1135414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood NULL); 1136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1137414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1138414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 1139414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 1140414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _regulator_disable(rdev->supply); 1141414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1142414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1143414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1144414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1145414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1146414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1147414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_force_disable - force disable regulator output 1148414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1149414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1150414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Forcibly disable the regulator output voltage or current. 1151414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this *will* disable the regulator output even if other consumer 1152414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * devices have it enabled. This should be used for situations when device 1153414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * damage will likely occur if the regulator is not disabled (e.g. over temp). 1154414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_force_disable(struct regulator *regulator) 1156414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1157414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1158414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1159414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1160414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->enabled = 0; 1161414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = 0; 1162414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_force_disable(regulator->rdev); 1163414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1164414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1165414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1166414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_force_disable); 1167414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1168414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev) 1169414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1170414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1171414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1172414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1173414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1174414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1175414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->is_enabled) { 1176414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1177414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1178414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1179414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1180414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->is_enabled(rdev); 1181414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1182414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1183414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1184414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1185414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1186414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1187414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_is_enabled - is the regulator output enabled 1188414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1189414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1190412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * Returns positive if the regulator driver backing the source/client 1191412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * has requested that the device be enabled, zero if it hasn't, else a 1192412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * negative errno code. 1193412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * 1194412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * Note that the device backing this regulator handle can have multiple 1195412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * users, so it might be enabled even if regulator_enable() was never 1196412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * called for this particular source. 1197414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1198414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_is_enabled(struct regulator *regulator) 1199414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1200414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_is_enabled(regulator->rdev); 1201414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1202414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_is_enabled); 1203414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1204414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1205414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_voltage - set regulator output voltage 1206414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1207414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uV: Minimum required voltage in uV 1208414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uV: Maximum acceptable voltage in uV 1209414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1210414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets a voltage regulator to the desired output voltage. This can be set 1211414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * during any regulator state. IOW, regulator can be disabled or enabled. 1212414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1213414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the voltage will change to the new value 1214414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1215414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new voltage when enabled. 1216414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1217414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is shared between several devices then the lowest 1218414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * request voltage that meets the system constraints will be used. 1219414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1220414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1221414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1222414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) 1223414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1224414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1225414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1226414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1227414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1228414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_voltage) { 1231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1234414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1235414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1236414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_voltage(rdev, &min_uV, &max_uV); 1237414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1238414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1239414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->min_uV = min_uV; 1240414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->max_uV = max_uV; 1241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV); 1242414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1243414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1244414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1245414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1246414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1247414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_voltage); 1248414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1249414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev) 1250414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1252414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->get_voltage) 1253414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->ops->get_voltage(rdev); 1254414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1255414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 1256414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1257414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1258414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1259414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_voltage - get regulator output voltage 1260414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1261414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1262414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current regulator voltage in uV. 1263414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1264414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the voltage value. This 1265414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1266414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1267414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_voltage(struct regulator *regulator) 1268414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1269414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1270414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1271414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1272414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1273414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_get_voltage(regulator->rdev); 1274414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1276414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1277414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1278414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1279414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_voltage); 1280414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1281414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1282414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_current_limit - set regulator output current limit 1283414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1284414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uA: Minimuum supported current in uA 1285414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uA: Maximum supported current in uA 1286414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1287414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets current sink to the desired output current. This can be set during 1288414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * any regulator state. IOW, regulator can be disabled or enabled. 1289414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1290414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the current will change to the new value 1291414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1292414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new current when enabled. 1293414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1294414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1295414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1296414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1297414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_current_limit(struct regulator *regulator, 1298414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uA, int max_uA) 1299414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1300414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1301414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1302414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1303414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1304414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1305414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1306414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_current_limit) { 1307414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1308414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1309414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1310414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1311414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1312414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_current_limit(rdev, &min_uA, &max_uA); 1313414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1314414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1315414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1316414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA); 1317414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1318414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1319414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1320414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1321414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_current_limit); 1322414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1323414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev) 1324414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1325414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1326414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1327414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1328414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1329414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1330414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_current_limit) { 1331414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1332414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1333414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1334414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1335414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_current_limit(rdev); 1336414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1337414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1338414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1339414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1340414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1341414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_current_limit - get regulator output current 1343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1345414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current supplied by the specified current sink in uA. 1346414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1347414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the current value. This 1348414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1350414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_current_limit(struct regulator *regulator) 1351414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1352414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_current_limit(regulator->rdev); 1353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1354414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_current_limit); 1355414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1356414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1357414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_mode - set regulator operating mode 1358414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1359414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @mode: operating mode - one of the REGULATOR_MODE constants 1360414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Set regulator operating mode to increase regulator efficiency or improve 1362414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulation performance. 1363414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1364414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1365414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1367414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_mode(struct regulator *regulator, unsigned int mode) 1368414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1369414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1372414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1374414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1375414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_mode) { 1376414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1377414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1379414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1380414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1381414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_mode(rdev, mode); 1382414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1383414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1384414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1388414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1390414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_mode); 1391414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev) 1393414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1394414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1399414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_mode) { 1400414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1401414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1402414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1403414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1404414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_mode(rdev); 1405414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1406414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1407414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1408414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1409414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1410414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1411414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_mode - get regulator operating mode 1412414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1413414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get the current regulator operating mode. 1415414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1416414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodunsigned int regulator_get_mode(struct regulator *regulator) 1417414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1418414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_mode(regulator->rdev); 1419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1420414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_mode); 1421414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1423414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_optimum_mode - set regulator optimum operating mode 1424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @uA_load: load current 1426414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1427414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Notifies the regulator core of a new device load. This is then used by 1428414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS (if enabled by constraints) to set the most efficient regulator 1429414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * operating mode for the new regulator loading. 1430414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1431414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Consumer devices notify their supply regulator of the maximum power 1432414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * they will require (can be taken from device datasheet in the power 1433414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption tables) when they change operational status and hence power 1434414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * state. Examples of operational state changes that can affect power 1435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption are :- 1436414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1437414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is opened / closed. 1438414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device I/O is about to begin or has just finished. 1439414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is idling in between work. 1440414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1441414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This information is also exported via sysfs to userspace. 1442414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1443414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS will sum the total requested load on the regulator and change 1444414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * to the most efficient operating mode if platform constraints allow. 1445414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1446414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns the new regulator mode or error. 1447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1448414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_optimum_mode(struct regulator *regulator, int uA_load) 1449414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1450414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *consumer; 1452414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret, output_uV, input_uV, total_uA_load = 0; 1453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 1454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = uA_load; 1458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_drms(rdev); 1459414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1462414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_optimum_mode) 1465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1467414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 1468414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 1469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) { 1470414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid output voltage found for %s\n", 1471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1473414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1474414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 1476414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 1477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 1478414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 1480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) { 1481414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: invalid input voltage found for %s\n", 1482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1484414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1485414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1486414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load for this regulator */ 1487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(consumer, &rdev->consumer_list, list) 1488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load += consumer->uA_load; 1489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, 1491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV, output_uV, 1492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load); 1493e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell ret = regulator_check_mode(rdev, mode); 1494e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell if (ret < 0) { 1495414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to get optimum mode for %s @" 1496414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood " %d uA %d -> %d uV\n", __func__, rdev->desc->name, 1497414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load, input_uV, output_uV); 1498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1500414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1502e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell if (ret < 0) { 1503414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to set optimum mode %x for %s\n", 1504414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, mode, rdev->desc->name); 1505414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1506414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1507414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = mode; 1508414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1509414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1510414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1511414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1512414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_optimum_mode); 1513414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1514414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register_notifier - register regulator event notifier 1516414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1517414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @notifier_block: notifier block 1518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1519414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Register notifier block to receive regulator events. 1520414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1521414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_register_notifier(struct regulator *regulator, 1522414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1523414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1524414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_register(®ulator->rdev->notifier, 1525414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1526414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1527414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register_notifier); 1528414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1529414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister_notifier - unregister regulator event notifier 1531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @notifier_block: notifier block 1533414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1534414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Unregister regulator event notifier block. 1535414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1536414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_unregister_notifier(struct regulator *regulator, 1537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1538414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1539414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_unregister(®ulator->rdev->notifier, 1540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1542414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister_notifier); 1543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1544414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* notify regulator consumers and downstream regulator consumers */ 1545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 1546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 1547414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1548414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *_rdev; 1549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1550414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* call rdev chain first */ 1551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1552414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood blocking_notifier_call_chain(&rdev->notifier, event, NULL); 1553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now notify regulator we supply */ 1556414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(_rdev, &rdev->supply_list, slist) 1557414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(_rdev, event, data); 1558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1559414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1560414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1561414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_get - get multiple regulator consumers 1562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @dev: Device to supply 1564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers to register 1565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Configuration of consumers; clients are stored here. 1566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure. 1568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1569414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This helper function allows drivers to get several regulator 1570414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumers in one operation. If any of the regulators cannot be 1571414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * acquired then any regulators that were allocated will be freed 1572414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * before returning to the caller. 1573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1574414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_get(struct device *dev, int num_consumers, 1575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1580414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 1581414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 1582414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1583414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1584414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = regulator_get(dev, 1585414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].supply); 1586414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (IS_ERR(consumers[i].consumer)) { 1587414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood dev_err(dev, "Failed to get supply '%s'\n", 1588414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].supply); 1589414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = PTR_ERR(consumers[i].consumer); 1590414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 1591414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 1592414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1593414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1594414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1595414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1596414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1597414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 1598414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers && consumers[i].consumer; i++) 1599414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 1600414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1601414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1602414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1603414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_get); 1604414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1605414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1606414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_enable - enable multiple regulator consumers 1607414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1608414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 1609414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 1610414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 1611414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1612414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to enable multiple regulator 1613414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 1614414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were enabled will be disabled again prior to 1615414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 1616414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1617414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_enable(int num_consumers, 1618414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1619414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1620414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1621414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1622414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_enable(consumers[i].consumer); 1625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 1626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 1627414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 1632414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "Failed to enable %s\n", consumers[i].supply); 1633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 1634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_disable(consumers[i].consumer); 1635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1637414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1638414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_enable); 1639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_disable - disable multiple regulator consumers 1642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 1644414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 1645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 1646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to disable multiple regulator 1648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 1649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were disabled will be disabled again prior to 1650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 1651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_disable(int num_consumers, 1653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1659414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_disable(consumers[i].consumer); 1660414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 1661414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 1662414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1663414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1664414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 1665414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1666414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 1667414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "Failed to disable %s\n", consumers[i].supply); 1668414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 1669414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_enable(consumers[i].consumer); 1670414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1671414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1672414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1673414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_disable); 1674414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1675414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1676414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_free - free multiple regulator consumers 1677414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1678414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 1679414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 1680414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1681414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to free multiple regulator 1682414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. 1683414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1684414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_bulk_free(int num_consumers, 1685414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 1686414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1687414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 1688414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1689414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 1690414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 1691414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 1692414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1693414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1694414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_free); 1695414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1696414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1697414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_notifier_call_chain - call regulator event notifier 1698414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1699414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @event: notifier block 1700414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @data: 1701414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1702414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to notify clients a regulator event has 1703414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * occurred. We also notify regulator clients downstream. 1704414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1705414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_notifier_call_chain(struct regulator_dev *rdev, 1706414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 1707414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1708414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(rdev, event, data); 1709414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NOTIFY_DONE; 1710414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1711414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1712414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_notifier_call_chain); 1713414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1714414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1715414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register - register regulator 1716414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1717414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @reg_data: private regulator data 1718414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1719414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to register a regulator. 1720414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns 0 on success. 1721414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1722414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, 1723a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct device *dev, void *driver_data) 1724414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1725414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood static atomic_t regulator_no = ATOMIC_INIT(0); 1726414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1727a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_init_data *init_data = dev->platform_data; 1728a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int ret, i; 1729414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1730414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc == NULL) 1731414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 1732414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1733414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc->name == NULL || regulator_desc->ops == NULL) 1734414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 1735414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1736414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!regulator_desc->type == REGULATOR_VOLTAGE && 1737414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood !regulator_desc->type == REGULATOR_CURRENT) 1738414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 1739414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 174046fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown if (!init_data) 174146fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown return ERR_PTR(-EINVAL); 174246fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown 1743414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); 1744414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 1745414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-ENOMEM); 1746414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1747414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1748414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1749414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_init(&rdev->mutex); 1750a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->reg_data = driver_data; 1751414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->owner = regulator_desc->owner; 1752414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc = regulator_desc; 1753414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->consumer_list); 1754414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->supply_list); 1755414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->list); 1756414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->slist); 1757414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier); 1758414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1759a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* preform any regulator specific init */ 1760a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->regulator_init) { 1761a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = init_data->regulator_init(rdev->reg_data); 17624fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 17634fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 1764a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1765a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1766a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* set regulator constraints */ 1767a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_machine_constraints(rdev, &init_data->constraints); 17684fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 17694fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 1770a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1771a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* register with sysfs */ 1772414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->dev.class = ®ulator_class; 1773a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->dev.parent = dev; 1774812460a927c1d0dc1fbdbec9aa07de1b04043d83Kay Sievers dev_set_name(&rdev->dev, "regulator.%d", 1775812460a927c1d0dc1fbdbec9aa07de1b04043d83Kay Sievers atomic_inc_return(®ulator_no) - 1); 1776a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = device_register(&rdev->dev); 17774fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret != 0) 17784fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 1779a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1780a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_set_drvdata(&rdev->dev, rdev); 1781a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1782a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* set supply regulator if it exists */ 1783a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->supply_regulator_dev) { 1784a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_supply(rdev, 1785a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_get_drvdata(init_data->supply_regulator_dev)); 17864fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 17874fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto scrub; 1788a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1789a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1790a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* add consumers devices */ 1791a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood for (i = 0; i < init_data->num_consumer_supplies; i++) { 1792a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_consumer_device_supply(rdev, 1793a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].dev, 1794a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].supply); 1795a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (ret < 0) { 1796a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood for (--i; i >= 0; i--) 1797a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood unset_consumer_device_supply(rdev, 1798a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].dev); 17994fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto scrub; 1800a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1801414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1802a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1803a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->list, ®ulator_list); 1804a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 1805414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1806414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev; 18074fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 18084fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellscrub: 18094fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell device_unregister(&rdev->dev); 18104fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellclean: 18114fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell kfree(rdev); 18124fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev = ERR_PTR(ret); 18134fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto out; 1814414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1815414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register); 1816414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1817414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1818414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister - unregister regulator 1819414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1820414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1821414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to unregister a regulator. 1822414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1823414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_unregister(struct regulator_dev *rdev) 1824414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1825414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 1826414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 1827414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1828414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1829414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(&rdev->list); 1830414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 1831414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, "supply"); 1832414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_unregister(&rdev->dev); 1833414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1834414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1835414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister); 1836414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1837414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1838414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_suspend_prepare: prepare regulators for system wide suspend 1839414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @state: system suspend state 1840414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1841414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Configure each regulator with it's suspend operating parameters for state. 1842414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This will usually be called by machine suspend code prior to supending. 1843414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1844414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_suspend_prepare(suspend_state_t state) 1845414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1846414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1847414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1848414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1849414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ON is handled by regulator active state */ 1850414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state == PM_SUSPEND_ON) 1851414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 1852414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1853414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1854414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 1855414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1856414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1857414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = suspend_prepare(rdev, state); 1858414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1859414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1860414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 1861414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_ERR "%s: failed to prepare %s\n", 1862414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __func__, rdev->desc->name); 1863414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1864414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1865414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1866414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1867414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1868414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1869414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1870414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_suspend_prepare); 1871414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1872414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1873414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * rdev_get_drvdata - get rdev regulator driver data 1874414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 1875414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1876414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get rdev regulator driver private data. This call can be used in the 1877414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator driver context. 1878414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1879414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *rdev_get_drvdata(struct regulator_dev *rdev) 1880414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1881414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->reg_data; 1882414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1883414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_drvdata); 1884414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1885414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1886414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_drvdata - get regulator driver data 1887414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 1888414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1889414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get regulator driver private data. This call can be used in the consumer 1890414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * driver context when non API regulator specific functions need to be called. 1891414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1892414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *regulator_get_drvdata(struct regulator *regulator) 1893414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1894414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator->rdev->reg_data; 1895414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1896414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_drvdata); 1897414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1898414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1899414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_drvdata - set regulator driver data 1900414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 1901414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @data: data 1902414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1903414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_set_drvdata(struct regulator *regulator, void *data) 1904414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1905414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev->reg_data = data; 1906414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1907414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_drvdata); 1908414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1909414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1910414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_id - get regulator ID 1911414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 1912414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1913414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint rdev_get_id(struct regulator_dev *rdev) 1914414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1915414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->id; 1916414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1917414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_id); 1918414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1919a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstruct device *rdev_get_dev(struct regulator_dev *rdev) 1920a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 1921a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return &rdev->dev; 1922a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 1923a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_dev); 1924a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1925a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodvoid *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) 1926a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 1927a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return reg_init_data->driver_data; 1928a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 1929a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_init_drvdata); 1930a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1931414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int __init regulator_init(void) 1932414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1933414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood printk(KERN_INFO "regulator: core version %s\n", REGULATOR_VERSION); 1934414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return class_register(®ulator_class); 1935414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1936414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1937414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* init early to allow our consumers to complete system booting */ 1938414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodcore_initcall(regulator_init); 1939