1414c70cbSLiam Girdwood /* 2414c70cbSLiam Girdwood * core.c -- Voltage/Current Regulator framework. 3414c70cbSLiam Girdwood * 4414c70cbSLiam Girdwood * Copyright 2007, 2008 Wolfson Microelectronics PLC. 5a5766f11SLiam Girdwood * Copyright 2008 SlimLogic Ltd. 6414c70cbSLiam Girdwood * 7a5766f11SLiam Girdwood * Author: Liam Girdwood <lrg@slimlogic.co.uk> 8414c70cbSLiam Girdwood * 9414c70cbSLiam Girdwood * This program is free software; you can redistribute it and/or modify it 10414c70cbSLiam Girdwood * under the terms of the GNU General Public License as published by the 11414c70cbSLiam Girdwood * Free Software Foundation; either version 2 of the License, or (at your 12414c70cbSLiam Girdwood * option) any later version. 13414c70cbSLiam Girdwood * 14414c70cbSLiam Girdwood */ 15414c70cbSLiam Girdwood 16414c70cbSLiam Girdwood #include <linux/kernel.h> 17414c70cbSLiam Girdwood #include <linux/init.h> 18414c70cbSLiam Girdwood #include <linux/device.h> 19414c70cbSLiam Girdwood #include <linux/err.h> 20414c70cbSLiam Girdwood #include <linux/mutex.h> 21414c70cbSLiam Girdwood #include <linux/suspend.h> 22414c70cbSLiam Girdwood #include <linux/regulator/consumer.h> 23414c70cbSLiam Girdwood #include <linux/regulator/driver.h> 24414c70cbSLiam Girdwood #include <linux/regulator/machine.h> 25414c70cbSLiam Girdwood 26414c70cbSLiam Girdwood #define REGULATOR_VERSION "0.5" 27414c70cbSLiam Girdwood 28414c70cbSLiam Girdwood static DEFINE_MUTEX(regulator_list_mutex); 29414c70cbSLiam Girdwood static LIST_HEAD(regulator_list); 30414c70cbSLiam Girdwood static LIST_HEAD(regulator_map_list); 31414c70cbSLiam Girdwood 32414c70cbSLiam Girdwood /** 33414c70cbSLiam Girdwood * struct regulator_dev 34414c70cbSLiam Girdwood * 35414c70cbSLiam Girdwood * Voltage / Current regulator class device. One for each regulator. 36414c70cbSLiam Girdwood */ 37414c70cbSLiam Girdwood struct regulator_dev { 38414c70cbSLiam Girdwood struct regulator_desc *desc; 39414c70cbSLiam Girdwood int use_count; 40414c70cbSLiam Girdwood 41414c70cbSLiam Girdwood /* lists we belong to */ 42414c70cbSLiam Girdwood struct list_head list; /* list of all regulators */ 43414c70cbSLiam Girdwood struct list_head slist; /* list of supplied regulators */ 44414c70cbSLiam Girdwood 45414c70cbSLiam Girdwood /* lists we own */ 46414c70cbSLiam Girdwood struct list_head consumer_list; /* consumers we supply */ 47414c70cbSLiam Girdwood struct list_head supply_list; /* regulators we supply */ 48414c70cbSLiam Girdwood 49414c70cbSLiam Girdwood struct blocking_notifier_head notifier; 50414c70cbSLiam Girdwood struct mutex mutex; /* consumer lock */ 51414c70cbSLiam Girdwood struct module *owner; 52414c70cbSLiam Girdwood struct device dev; 53414c70cbSLiam Girdwood struct regulation_constraints *constraints; 54414c70cbSLiam Girdwood struct regulator_dev *supply; /* for tree */ 55414c70cbSLiam Girdwood 56414c70cbSLiam Girdwood void *reg_data; /* regulator_dev data */ 57414c70cbSLiam Girdwood }; 58414c70cbSLiam Girdwood 59414c70cbSLiam Girdwood /** 60414c70cbSLiam Girdwood * struct regulator_map 61414c70cbSLiam Girdwood * 62414c70cbSLiam Girdwood * Used to provide symbolic supply names to devices. 63414c70cbSLiam Girdwood */ 64414c70cbSLiam Girdwood struct regulator_map { 65414c70cbSLiam Girdwood struct list_head list; 66414c70cbSLiam Girdwood struct device *dev; 67414c70cbSLiam Girdwood const char *supply; 68a5766f11SLiam Girdwood struct regulator_dev *regulator; 69414c70cbSLiam Girdwood }; 70414c70cbSLiam Girdwood 71414c70cbSLiam Girdwood /* 72414c70cbSLiam Girdwood * struct regulator 73414c70cbSLiam Girdwood * 74414c70cbSLiam Girdwood * One for each consumer device. 75414c70cbSLiam Girdwood */ 76414c70cbSLiam Girdwood struct regulator { 77414c70cbSLiam Girdwood struct device *dev; 78414c70cbSLiam Girdwood struct list_head list; 79414c70cbSLiam Girdwood int uA_load; 80414c70cbSLiam Girdwood int min_uV; 81414c70cbSLiam Girdwood int max_uV; 82414c70cbSLiam Girdwood int enabled; /* client has called enabled */ 83414c70cbSLiam Girdwood char *supply_name; 84414c70cbSLiam Girdwood struct device_attribute dev_attr; 85414c70cbSLiam Girdwood struct regulator_dev *rdev; 86414c70cbSLiam Girdwood }; 87414c70cbSLiam Girdwood 88414c70cbSLiam Girdwood static int _regulator_is_enabled(struct regulator_dev *rdev); 89414c70cbSLiam Girdwood static int _regulator_disable(struct regulator_dev *rdev); 90414c70cbSLiam Girdwood static int _regulator_get_voltage(struct regulator_dev *rdev); 91414c70cbSLiam Girdwood static int _regulator_get_current_limit(struct regulator_dev *rdev); 92414c70cbSLiam Girdwood static unsigned int _regulator_get_mode(struct regulator_dev *rdev); 93414c70cbSLiam Girdwood static void _notifier_call_chain(struct regulator_dev *rdev, 94414c70cbSLiam Girdwood unsigned long event, void *data); 95414c70cbSLiam Girdwood 96414c70cbSLiam Girdwood /* gets the regulator for a given consumer device */ 97414c70cbSLiam Girdwood static struct regulator *get_device_regulator(struct device *dev) 98414c70cbSLiam Girdwood { 99414c70cbSLiam Girdwood struct regulator *regulator = NULL; 100414c70cbSLiam Girdwood struct regulator_dev *rdev; 101414c70cbSLiam Girdwood 102414c70cbSLiam Girdwood mutex_lock(®ulator_list_mutex); 103414c70cbSLiam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 104414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 105414c70cbSLiam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) { 106414c70cbSLiam Girdwood if (regulator->dev == dev) { 107414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 108414c70cbSLiam Girdwood mutex_unlock(®ulator_list_mutex); 109414c70cbSLiam Girdwood return regulator; 110414c70cbSLiam Girdwood } 111414c70cbSLiam Girdwood } 112414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 113414c70cbSLiam Girdwood } 114414c70cbSLiam Girdwood mutex_unlock(®ulator_list_mutex); 115414c70cbSLiam Girdwood return NULL; 116414c70cbSLiam Girdwood } 117414c70cbSLiam Girdwood 118414c70cbSLiam Girdwood /* Platform voltage constraint check */ 119414c70cbSLiam Girdwood static int regulator_check_voltage(struct regulator_dev *rdev, 120414c70cbSLiam Girdwood int *min_uV, int *max_uV) 121414c70cbSLiam Girdwood { 122414c70cbSLiam Girdwood BUG_ON(*min_uV > *max_uV); 123414c70cbSLiam Girdwood 124414c70cbSLiam Girdwood if (!rdev->constraints) { 125414c70cbSLiam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 126414c70cbSLiam Girdwood rdev->desc->name); 127414c70cbSLiam Girdwood return -ENODEV; 128414c70cbSLiam Girdwood } 129414c70cbSLiam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) { 130414c70cbSLiam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 131414c70cbSLiam Girdwood __func__, rdev->desc->name); 132414c70cbSLiam Girdwood return -EPERM; 133414c70cbSLiam Girdwood } 134414c70cbSLiam Girdwood 135414c70cbSLiam Girdwood if (*max_uV > rdev->constraints->max_uV) 136414c70cbSLiam Girdwood *max_uV = rdev->constraints->max_uV; 137414c70cbSLiam Girdwood if (*min_uV < rdev->constraints->min_uV) 138414c70cbSLiam Girdwood *min_uV = rdev->constraints->min_uV; 139414c70cbSLiam Girdwood 140414c70cbSLiam Girdwood if (*min_uV > *max_uV) 141414c70cbSLiam Girdwood return -EINVAL; 142414c70cbSLiam Girdwood 143414c70cbSLiam Girdwood return 0; 144414c70cbSLiam Girdwood } 145414c70cbSLiam Girdwood 146414c70cbSLiam Girdwood /* current constraint check */ 147414c70cbSLiam Girdwood static int regulator_check_current_limit(struct regulator_dev *rdev, 148414c70cbSLiam Girdwood int *min_uA, int *max_uA) 149414c70cbSLiam Girdwood { 150414c70cbSLiam Girdwood BUG_ON(*min_uA > *max_uA); 151414c70cbSLiam Girdwood 152414c70cbSLiam Girdwood if (!rdev->constraints) { 153414c70cbSLiam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 154414c70cbSLiam Girdwood rdev->desc->name); 155414c70cbSLiam Girdwood return -ENODEV; 156414c70cbSLiam Girdwood } 157414c70cbSLiam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_CURRENT)) { 158414c70cbSLiam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 159414c70cbSLiam Girdwood __func__, rdev->desc->name); 160414c70cbSLiam Girdwood return -EPERM; 161414c70cbSLiam Girdwood } 162414c70cbSLiam Girdwood 163414c70cbSLiam Girdwood if (*max_uA > rdev->constraints->max_uA) 164414c70cbSLiam Girdwood *max_uA = rdev->constraints->max_uA; 165414c70cbSLiam Girdwood if (*min_uA < rdev->constraints->min_uA) 166414c70cbSLiam Girdwood *min_uA = rdev->constraints->min_uA; 167414c70cbSLiam Girdwood 168414c70cbSLiam Girdwood if (*min_uA > *max_uA) 169414c70cbSLiam Girdwood return -EINVAL; 170414c70cbSLiam Girdwood 171414c70cbSLiam Girdwood return 0; 172414c70cbSLiam Girdwood } 173414c70cbSLiam Girdwood 174414c70cbSLiam Girdwood /* operating mode constraint check */ 175414c70cbSLiam Girdwood static int regulator_check_mode(struct regulator_dev *rdev, int mode) 176414c70cbSLiam Girdwood { 177414c70cbSLiam Girdwood if (!rdev->constraints) { 178414c70cbSLiam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 179414c70cbSLiam Girdwood rdev->desc->name); 180414c70cbSLiam Girdwood return -ENODEV; 181414c70cbSLiam Girdwood } 182414c70cbSLiam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) { 183414c70cbSLiam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 184414c70cbSLiam Girdwood __func__, rdev->desc->name); 185414c70cbSLiam Girdwood return -EPERM; 186414c70cbSLiam Girdwood } 187414c70cbSLiam Girdwood if (!(rdev->constraints->valid_modes_mask & mode)) { 188414c70cbSLiam Girdwood printk(KERN_ERR "%s: invalid mode %x for %s\n", 189414c70cbSLiam Girdwood __func__, mode, rdev->desc->name); 190414c70cbSLiam Girdwood return -EINVAL; 191414c70cbSLiam Girdwood } 192414c70cbSLiam Girdwood return 0; 193414c70cbSLiam Girdwood } 194414c70cbSLiam Girdwood 195414c70cbSLiam Girdwood /* dynamic regulator mode switching constraint check */ 196414c70cbSLiam Girdwood static int regulator_check_drms(struct regulator_dev *rdev) 197414c70cbSLiam Girdwood { 198414c70cbSLiam Girdwood if (!rdev->constraints) { 199414c70cbSLiam Girdwood printk(KERN_ERR "%s: no constraints for %s\n", __func__, 200414c70cbSLiam Girdwood rdev->desc->name); 201414c70cbSLiam Girdwood return -ENODEV; 202414c70cbSLiam Girdwood } 203414c70cbSLiam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) { 204414c70cbSLiam Girdwood printk(KERN_ERR "%s: operation not allowed for %s\n", 205414c70cbSLiam Girdwood __func__, rdev->desc->name); 206414c70cbSLiam Girdwood return -EPERM; 207414c70cbSLiam Girdwood } 208414c70cbSLiam Girdwood return 0; 209414c70cbSLiam Girdwood } 210414c70cbSLiam Girdwood 211414c70cbSLiam Girdwood static ssize_t device_requested_uA_show(struct device *dev, 212414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 213414c70cbSLiam Girdwood { 214414c70cbSLiam Girdwood struct regulator *regulator; 215414c70cbSLiam Girdwood 216414c70cbSLiam Girdwood regulator = get_device_regulator(dev); 217414c70cbSLiam Girdwood if (regulator == NULL) 218414c70cbSLiam Girdwood return 0; 219414c70cbSLiam Girdwood 220414c70cbSLiam Girdwood return sprintf(buf, "%d\n", regulator->uA_load); 221414c70cbSLiam Girdwood } 222414c70cbSLiam Girdwood 223414c70cbSLiam Girdwood static ssize_t regulator_uV_show(struct device *dev, 224414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 225414c70cbSLiam Girdwood { 226a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 227414c70cbSLiam Girdwood ssize_t ret; 228414c70cbSLiam Girdwood 229414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 230414c70cbSLiam Girdwood ret = sprintf(buf, "%d\n", _regulator_get_voltage(rdev)); 231414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 232414c70cbSLiam Girdwood 233414c70cbSLiam Girdwood return ret; 234414c70cbSLiam Girdwood } 235414c70cbSLiam Girdwood 236414c70cbSLiam Girdwood static ssize_t regulator_uA_show(struct device *dev, 237414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 238414c70cbSLiam Girdwood { 239a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 240414c70cbSLiam Girdwood 241414c70cbSLiam Girdwood return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev)); 242414c70cbSLiam Girdwood } 243414c70cbSLiam Girdwood 244414c70cbSLiam Girdwood static ssize_t regulator_opmode_show(struct device *dev, 245414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 246414c70cbSLiam Girdwood { 247a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 248414c70cbSLiam Girdwood int mode = _regulator_get_mode(rdev); 249414c70cbSLiam Girdwood 250414c70cbSLiam Girdwood switch (mode) { 251414c70cbSLiam Girdwood case REGULATOR_MODE_FAST: 252414c70cbSLiam Girdwood return sprintf(buf, "fast\n"); 253414c70cbSLiam Girdwood case REGULATOR_MODE_NORMAL: 254414c70cbSLiam Girdwood return sprintf(buf, "normal\n"); 255414c70cbSLiam Girdwood case REGULATOR_MODE_IDLE: 256414c70cbSLiam Girdwood return sprintf(buf, "idle\n"); 257414c70cbSLiam Girdwood case REGULATOR_MODE_STANDBY: 258414c70cbSLiam Girdwood return sprintf(buf, "standby\n"); 259414c70cbSLiam Girdwood } 260414c70cbSLiam Girdwood return sprintf(buf, "unknown\n"); 261414c70cbSLiam Girdwood } 262414c70cbSLiam Girdwood 263414c70cbSLiam Girdwood static ssize_t regulator_state_show(struct device *dev, 264414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 265414c70cbSLiam Girdwood { 266a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 267414c70cbSLiam Girdwood int state = _regulator_is_enabled(rdev); 268414c70cbSLiam Girdwood 269414c70cbSLiam Girdwood if (state > 0) 270414c70cbSLiam Girdwood return sprintf(buf, "enabled\n"); 271414c70cbSLiam Girdwood else if (state == 0) 272414c70cbSLiam Girdwood return sprintf(buf, "disabled\n"); 273414c70cbSLiam Girdwood else 274414c70cbSLiam Girdwood return sprintf(buf, "unknown\n"); 275414c70cbSLiam Girdwood } 276414c70cbSLiam Girdwood 277414c70cbSLiam Girdwood static ssize_t regulator_min_uA_show(struct device *dev, 278414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 279414c70cbSLiam Girdwood { 280a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 281414c70cbSLiam Girdwood 282414c70cbSLiam Girdwood if (!rdev->constraints) 283414c70cbSLiam Girdwood return sprintf(buf, "constraint not defined\n"); 284414c70cbSLiam Girdwood 285414c70cbSLiam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uA); 286414c70cbSLiam Girdwood } 287414c70cbSLiam Girdwood 288414c70cbSLiam Girdwood static ssize_t regulator_max_uA_show(struct device *dev, 289414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 290414c70cbSLiam Girdwood { 291a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 292414c70cbSLiam Girdwood 293414c70cbSLiam Girdwood if (!rdev->constraints) 294414c70cbSLiam Girdwood return sprintf(buf, "constraint not defined\n"); 295414c70cbSLiam Girdwood 296414c70cbSLiam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uA); 297414c70cbSLiam Girdwood } 298414c70cbSLiam Girdwood 299414c70cbSLiam Girdwood static ssize_t regulator_min_uV_show(struct device *dev, 300414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 301414c70cbSLiam Girdwood { 302a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 303414c70cbSLiam Girdwood 304414c70cbSLiam Girdwood if (!rdev->constraints) 305414c70cbSLiam Girdwood return sprintf(buf, "constraint not defined\n"); 306414c70cbSLiam Girdwood 307414c70cbSLiam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uV); 308414c70cbSLiam Girdwood } 309414c70cbSLiam Girdwood 310414c70cbSLiam Girdwood static ssize_t regulator_max_uV_show(struct device *dev, 311414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 312414c70cbSLiam Girdwood { 313a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 314414c70cbSLiam Girdwood 315414c70cbSLiam Girdwood if (!rdev->constraints) 316414c70cbSLiam Girdwood return sprintf(buf, "constraint not defined\n"); 317414c70cbSLiam Girdwood 318414c70cbSLiam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uV); 319414c70cbSLiam Girdwood } 320414c70cbSLiam Girdwood 321414c70cbSLiam Girdwood static ssize_t regulator_total_uA_show(struct device *dev, 322414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 323414c70cbSLiam Girdwood { 324a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 325414c70cbSLiam Girdwood struct regulator *regulator; 326414c70cbSLiam Girdwood int uA = 0; 327414c70cbSLiam Girdwood 328414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 329414c70cbSLiam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) 330414c70cbSLiam Girdwood uA += regulator->uA_load; 331414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 332414c70cbSLiam Girdwood return sprintf(buf, "%d\n", uA); 333414c70cbSLiam Girdwood } 334414c70cbSLiam Girdwood 335414c70cbSLiam Girdwood static ssize_t regulator_num_users_show(struct device *dev, 336414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 337414c70cbSLiam Girdwood { 338a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 339414c70cbSLiam Girdwood return sprintf(buf, "%d\n", rdev->use_count); 340414c70cbSLiam Girdwood } 341414c70cbSLiam Girdwood 342414c70cbSLiam Girdwood static ssize_t regulator_type_show(struct device *dev, 343414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 344414c70cbSLiam Girdwood { 345a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 346414c70cbSLiam Girdwood 347414c70cbSLiam Girdwood switch (rdev->desc->type) { 348414c70cbSLiam Girdwood case REGULATOR_VOLTAGE: 349414c70cbSLiam Girdwood return sprintf(buf, "voltage\n"); 350414c70cbSLiam Girdwood case REGULATOR_CURRENT: 351414c70cbSLiam Girdwood return sprintf(buf, "current\n"); 352414c70cbSLiam Girdwood } 353414c70cbSLiam Girdwood return sprintf(buf, "unknown\n"); 354414c70cbSLiam Girdwood } 355414c70cbSLiam Girdwood 356414c70cbSLiam Girdwood static ssize_t regulator_suspend_mem_uV_show(struct device *dev, 357414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 358414c70cbSLiam Girdwood { 359a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 360414c70cbSLiam Girdwood 361414c70cbSLiam Girdwood if (!rdev->constraints) 362414c70cbSLiam Girdwood return sprintf(buf, "not defined\n"); 363414c70cbSLiam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV); 364414c70cbSLiam Girdwood } 365414c70cbSLiam Girdwood 366414c70cbSLiam Girdwood static ssize_t regulator_suspend_disk_uV_show(struct device *dev, 367414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 368414c70cbSLiam Girdwood { 369a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 370414c70cbSLiam Girdwood 371414c70cbSLiam Girdwood if (!rdev->constraints) 372414c70cbSLiam Girdwood return sprintf(buf, "not defined\n"); 373414c70cbSLiam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV); 374414c70cbSLiam Girdwood } 375414c70cbSLiam Girdwood 376414c70cbSLiam Girdwood static ssize_t regulator_suspend_standby_uV_show(struct device *dev, 377414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 378414c70cbSLiam Girdwood { 379a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 380414c70cbSLiam Girdwood 381414c70cbSLiam Girdwood if (!rdev->constraints) 382414c70cbSLiam Girdwood return sprintf(buf, "not defined\n"); 383414c70cbSLiam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV); 384414c70cbSLiam Girdwood } 385414c70cbSLiam Girdwood 386414c70cbSLiam Girdwood static ssize_t suspend_opmode_show(struct regulator_dev *rdev, 387414c70cbSLiam Girdwood unsigned int mode, char *buf) 388414c70cbSLiam Girdwood { 389414c70cbSLiam Girdwood switch (mode) { 390414c70cbSLiam Girdwood case REGULATOR_MODE_FAST: 391414c70cbSLiam Girdwood return sprintf(buf, "fast\n"); 392414c70cbSLiam Girdwood case REGULATOR_MODE_NORMAL: 393414c70cbSLiam Girdwood return sprintf(buf, "normal\n"); 394414c70cbSLiam Girdwood case REGULATOR_MODE_IDLE: 395414c70cbSLiam Girdwood return sprintf(buf, "idle\n"); 396414c70cbSLiam Girdwood case REGULATOR_MODE_STANDBY: 397414c70cbSLiam Girdwood return sprintf(buf, "standby\n"); 398414c70cbSLiam Girdwood } 399414c70cbSLiam Girdwood return sprintf(buf, "unknown\n"); 400414c70cbSLiam Girdwood } 401414c70cbSLiam Girdwood 402414c70cbSLiam Girdwood static ssize_t regulator_suspend_mem_mode_show(struct device *dev, 403414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 404414c70cbSLiam Girdwood { 405a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 406414c70cbSLiam Girdwood 407414c70cbSLiam Girdwood if (!rdev->constraints) 408414c70cbSLiam Girdwood return sprintf(buf, "not defined\n"); 409414c70cbSLiam Girdwood return suspend_opmode_show(rdev, 410414c70cbSLiam Girdwood rdev->constraints->state_mem.mode, buf); 411414c70cbSLiam Girdwood } 412414c70cbSLiam Girdwood 413414c70cbSLiam Girdwood static ssize_t regulator_suspend_disk_mode_show(struct device *dev, 414414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 415414c70cbSLiam Girdwood { 416a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 417414c70cbSLiam Girdwood 418414c70cbSLiam Girdwood if (!rdev->constraints) 419414c70cbSLiam Girdwood return sprintf(buf, "not defined\n"); 420414c70cbSLiam Girdwood return suspend_opmode_show(rdev, 421414c70cbSLiam Girdwood rdev->constraints->state_disk.mode, buf); 422414c70cbSLiam Girdwood } 423414c70cbSLiam Girdwood 424414c70cbSLiam Girdwood static ssize_t regulator_suspend_standby_mode_show(struct device *dev, 425414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 426414c70cbSLiam Girdwood { 427a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 428414c70cbSLiam Girdwood 429414c70cbSLiam Girdwood if (!rdev->constraints) 430414c70cbSLiam Girdwood return sprintf(buf, "not defined\n"); 431414c70cbSLiam Girdwood return suspend_opmode_show(rdev, 432414c70cbSLiam Girdwood rdev->constraints->state_standby.mode, buf); 433414c70cbSLiam Girdwood } 434414c70cbSLiam Girdwood 435414c70cbSLiam Girdwood static ssize_t regulator_suspend_mem_state_show(struct device *dev, 436414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 437414c70cbSLiam Girdwood { 438a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 439414c70cbSLiam Girdwood 440414c70cbSLiam Girdwood if (!rdev->constraints) 441414c70cbSLiam Girdwood return sprintf(buf, "not defined\n"); 442414c70cbSLiam Girdwood 443414c70cbSLiam Girdwood if (rdev->constraints->state_mem.enabled) 444414c70cbSLiam Girdwood return sprintf(buf, "enabled\n"); 445414c70cbSLiam Girdwood else 446414c70cbSLiam Girdwood return sprintf(buf, "disabled\n"); 447414c70cbSLiam Girdwood } 448414c70cbSLiam Girdwood 449414c70cbSLiam Girdwood static ssize_t regulator_suspend_disk_state_show(struct device *dev, 450414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 451414c70cbSLiam Girdwood { 452a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 453414c70cbSLiam Girdwood 454414c70cbSLiam Girdwood if (!rdev->constraints) 455414c70cbSLiam Girdwood return sprintf(buf, "not defined\n"); 456414c70cbSLiam Girdwood 457414c70cbSLiam Girdwood if (rdev->constraints->state_disk.enabled) 458414c70cbSLiam Girdwood return sprintf(buf, "enabled\n"); 459414c70cbSLiam Girdwood else 460414c70cbSLiam Girdwood return sprintf(buf, "disabled\n"); 461414c70cbSLiam Girdwood } 462414c70cbSLiam Girdwood 463414c70cbSLiam Girdwood static ssize_t regulator_suspend_standby_state_show(struct device *dev, 464414c70cbSLiam Girdwood struct device_attribute *attr, char *buf) 465414c70cbSLiam Girdwood { 466a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 467414c70cbSLiam Girdwood 468414c70cbSLiam Girdwood if (!rdev->constraints) 469414c70cbSLiam Girdwood return sprintf(buf, "not defined\n"); 470414c70cbSLiam Girdwood 471414c70cbSLiam Girdwood if (rdev->constraints->state_standby.enabled) 472414c70cbSLiam Girdwood return sprintf(buf, "enabled\n"); 473414c70cbSLiam Girdwood else 474414c70cbSLiam Girdwood return sprintf(buf, "disabled\n"); 475414c70cbSLiam Girdwood } 476414c70cbSLiam Girdwood static struct device_attribute regulator_dev_attrs[] = { 477414c70cbSLiam Girdwood __ATTR(microvolts, 0444, regulator_uV_show, NULL), 478414c70cbSLiam Girdwood __ATTR(microamps, 0444, regulator_uA_show, NULL), 479414c70cbSLiam Girdwood __ATTR(opmode, 0444, regulator_opmode_show, NULL), 480414c70cbSLiam Girdwood __ATTR(state, 0444, regulator_state_show, NULL), 481414c70cbSLiam Girdwood __ATTR(min_microvolts, 0444, regulator_min_uV_show, NULL), 482414c70cbSLiam Girdwood __ATTR(min_microamps, 0444, regulator_min_uA_show, NULL), 483414c70cbSLiam Girdwood __ATTR(max_microvolts, 0444, regulator_max_uV_show, NULL), 484414c70cbSLiam Girdwood __ATTR(max_microamps, 0444, regulator_max_uA_show, NULL), 485414c70cbSLiam Girdwood __ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL), 486414c70cbSLiam Girdwood __ATTR(num_users, 0444, regulator_num_users_show, NULL), 487414c70cbSLiam Girdwood __ATTR(type, 0444, regulator_type_show, NULL), 488414c70cbSLiam Girdwood __ATTR(suspend_mem_microvolts, 0444, 489414c70cbSLiam Girdwood regulator_suspend_mem_uV_show, NULL), 490414c70cbSLiam Girdwood __ATTR(suspend_disk_microvolts, 0444, 491414c70cbSLiam Girdwood regulator_suspend_disk_uV_show, NULL), 492414c70cbSLiam Girdwood __ATTR(suspend_standby_microvolts, 0444, 493414c70cbSLiam Girdwood regulator_suspend_standby_uV_show, NULL), 494414c70cbSLiam Girdwood __ATTR(suspend_mem_mode, 0444, 495414c70cbSLiam Girdwood regulator_suspend_mem_mode_show, NULL), 496414c70cbSLiam Girdwood __ATTR(suspend_disk_mode, 0444, 497414c70cbSLiam Girdwood regulator_suspend_disk_mode_show, NULL), 498414c70cbSLiam Girdwood __ATTR(suspend_standby_mode, 0444, 499414c70cbSLiam Girdwood regulator_suspend_standby_mode_show, NULL), 500414c70cbSLiam Girdwood __ATTR(suspend_mem_state, 0444, 501414c70cbSLiam Girdwood regulator_suspend_mem_state_show, NULL), 502414c70cbSLiam Girdwood __ATTR(suspend_disk_state, 0444, 503414c70cbSLiam Girdwood regulator_suspend_disk_state_show, NULL), 504414c70cbSLiam Girdwood __ATTR(suspend_standby_state, 0444, 505414c70cbSLiam Girdwood regulator_suspend_standby_state_show, NULL), 506414c70cbSLiam Girdwood __ATTR_NULL, 507414c70cbSLiam Girdwood }; 508414c70cbSLiam Girdwood 509414c70cbSLiam Girdwood static void regulator_dev_release(struct device *dev) 510414c70cbSLiam Girdwood { 511a5766f11SLiam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 512414c70cbSLiam Girdwood kfree(rdev); 513414c70cbSLiam Girdwood } 514414c70cbSLiam Girdwood 515414c70cbSLiam Girdwood static struct class regulator_class = { 516414c70cbSLiam Girdwood .name = "regulator", 517414c70cbSLiam Girdwood .dev_release = regulator_dev_release, 518414c70cbSLiam Girdwood .dev_attrs = regulator_dev_attrs, 519414c70cbSLiam Girdwood }; 520414c70cbSLiam Girdwood 521414c70cbSLiam Girdwood /* Calculate the new optimum regulator operating mode based on the new total 522414c70cbSLiam Girdwood * consumer load. All locks held by caller */ 523414c70cbSLiam Girdwood static void drms_uA_update(struct regulator_dev *rdev) 524414c70cbSLiam Girdwood { 525414c70cbSLiam Girdwood struct regulator *sibling; 526414c70cbSLiam Girdwood int current_uA = 0, output_uV, input_uV, err; 527414c70cbSLiam Girdwood unsigned int mode; 528414c70cbSLiam Girdwood 529414c70cbSLiam Girdwood err = regulator_check_drms(rdev); 530414c70cbSLiam Girdwood if (err < 0 || !rdev->desc->ops->get_optimum_mode || 531414c70cbSLiam Girdwood !rdev->desc->ops->get_voltage || !rdev->desc->ops->set_mode); 532414c70cbSLiam Girdwood return; 533414c70cbSLiam Girdwood 534414c70cbSLiam Girdwood /* get output voltage */ 535414c70cbSLiam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 536414c70cbSLiam Girdwood if (output_uV <= 0) 537414c70cbSLiam Girdwood return; 538414c70cbSLiam Girdwood 539414c70cbSLiam Girdwood /* get input voltage */ 540414c70cbSLiam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 541414c70cbSLiam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 542414c70cbSLiam Girdwood else 543414c70cbSLiam Girdwood input_uV = rdev->constraints->input_uV; 544414c70cbSLiam Girdwood if (input_uV <= 0) 545414c70cbSLiam Girdwood return; 546414c70cbSLiam Girdwood 547414c70cbSLiam Girdwood /* calc total requested load */ 548414c70cbSLiam Girdwood list_for_each_entry(sibling, &rdev->consumer_list, list) 549414c70cbSLiam Girdwood current_uA += sibling->uA_load; 550414c70cbSLiam Girdwood 551414c70cbSLiam Girdwood /* now get the optimum mode for our new total regulator load */ 552414c70cbSLiam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV, 553414c70cbSLiam Girdwood output_uV, current_uA); 554414c70cbSLiam Girdwood 555414c70cbSLiam Girdwood /* check the new mode is allowed */ 556414c70cbSLiam Girdwood err = regulator_check_mode(rdev, mode); 557414c70cbSLiam Girdwood if (err == 0) 558414c70cbSLiam Girdwood rdev->desc->ops->set_mode(rdev, mode); 559414c70cbSLiam Girdwood } 560414c70cbSLiam Girdwood 561414c70cbSLiam Girdwood static int suspend_set_state(struct regulator_dev *rdev, 562414c70cbSLiam Girdwood struct regulator_state *rstate) 563414c70cbSLiam Girdwood { 564414c70cbSLiam Girdwood int ret = 0; 565414c70cbSLiam Girdwood 566414c70cbSLiam Girdwood /* enable & disable are mandatory for suspend control */ 567414c70cbSLiam Girdwood if (!rdev->desc->ops->set_suspend_enable || 568a5766f11SLiam Girdwood !rdev->desc->ops->set_suspend_disable) { 569a5766f11SLiam Girdwood printk(KERN_ERR "%s: no way to set suspend state\n", 570a5766f11SLiam Girdwood __func__); 571414c70cbSLiam Girdwood return -EINVAL; 572a5766f11SLiam Girdwood } 573414c70cbSLiam Girdwood 574414c70cbSLiam Girdwood if (rstate->enabled) 575414c70cbSLiam Girdwood ret = rdev->desc->ops->set_suspend_enable(rdev); 576414c70cbSLiam Girdwood else 577414c70cbSLiam Girdwood ret = rdev->desc->ops->set_suspend_disable(rdev); 578414c70cbSLiam Girdwood if (ret < 0) { 579414c70cbSLiam Girdwood printk(KERN_ERR "%s: failed to enabled/disable\n", __func__); 580414c70cbSLiam Girdwood return ret; 581414c70cbSLiam Girdwood } 582414c70cbSLiam Girdwood 583414c70cbSLiam Girdwood if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) { 584414c70cbSLiam Girdwood ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV); 585414c70cbSLiam Girdwood if (ret < 0) { 586414c70cbSLiam Girdwood printk(KERN_ERR "%s: failed to set voltage\n", 587414c70cbSLiam Girdwood __func__); 588414c70cbSLiam Girdwood return ret; 589414c70cbSLiam Girdwood } 590414c70cbSLiam Girdwood } 591414c70cbSLiam Girdwood 592414c70cbSLiam Girdwood if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) { 593414c70cbSLiam Girdwood ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode); 594414c70cbSLiam Girdwood if (ret < 0) { 595414c70cbSLiam Girdwood printk(KERN_ERR "%s: failed to set mode\n", __func__); 596414c70cbSLiam Girdwood return ret; 597414c70cbSLiam Girdwood } 598414c70cbSLiam Girdwood } 599414c70cbSLiam Girdwood return ret; 600414c70cbSLiam Girdwood } 601414c70cbSLiam Girdwood 602414c70cbSLiam Girdwood /* locks held by caller */ 603414c70cbSLiam Girdwood static int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state) 604414c70cbSLiam Girdwood { 605414c70cbSLiam Girdwood if (!rdev->constraints) 606414c70cbSLiam Girdwood return -EINVAL; 607414c70cbSLiam Girdwood 608414c70cbSLiam Girdwood switch (state) { 609414c70cbSLiam Girdwood case PM_SUSPEND_STANDBY: 610414c70cbSLiam Girdwood return suspend_set_state(rdev, 611414c70cbSLiam Girdwood &rdev->constraints->state_standby); 612414c70cbSLiam Girdwood case PM_SUSPEND_MEM: 613414c70cbSLiam Girdwood return suspend_set_state(rdev, 614414c70cbSLiam Girdwood &rdev->constraints->state_mem); 615414c70cbSLiam Girdwood case PM_SUSPEND_MAX: 616414c70cbSLiam Girdwood return suspend_set_state(rdev, 617414c70cbSLiam Girdwood &rdev->constraints->state_disk); 618414c70cbSLiam Girdwood default: 619414c70cbSLiam Girdwood return -EINVAL; 620414c70cbSLiam Girdwood } 621414c70cbSLiam Girdwood } 622414c70cbSLiam Girdwood 623414c70cbSLiam Girdwood static void print_constraints(struct regulator_dev *rdev) 624414c70cbSLiam Girdwood { 625414c70cbSLiam Girdwood struct regulation_constraints *constraints = rdev->constraints; 626414c70cbSLiam Girdwood char buf[80]; 627414c70cbSLiam Girdwood int count; 628414c70cbSLiam Girdwood 629414c70cbSLiam Girdwood if (rdev->desc->type == REGULATOR_VOLTAGE) { 630414c70cbSLiam Girdwood if (constraints->min_uV == constraints->max_uV) 631414c70cbSLiam Girdwood count = sprintf(buf, "%d mV ", 632414c70cbSLiam Girdwood constraints->min_uV / 1000); 633414c70cbSLiam Girdwood else 634414c70cbSLiam Girdwood count = sprintf(buf, "%d <--> %d mV ", 635414c70cbSLiam Girdwood constraints->min_uV / 1000, 636414c70cbSLiam Girdwood constraints->max_uV / 1000); 637414c70cbSLiam Girdwood } else { 638414c70cbSLiam Girdwood if (constraints->min_uA == constraints->max_uA) 639414c70cbSLiam Girdwood count = sprintf(buf, "%d mA ", 640414c70cbSLiam Girdwood constraints->min_uA / 1000); 641414c70cbSLiam Girdwood else 642414c70cbSLiam Girdwood count = sprintf(buf, "%d <--> %d mA ", 643414c70cbSLiam Girdwood constraints->min_uA / 1000, 644414c70cbSLiam Girdwood constraints->max_uA / 1000); 645414c70cbSLiam Girdwood } 646414c70cbSLiam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_FAST) 647414c70cbSLiam Girdwood count += sprintf(buf + count, "fast "); 648414c70cbSLiam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL) 649414c70cbSLiam Girdwood count += sprintf(buf + count, "normal "); 650414c70cbSLiam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE) 651414c70cbSLiam Girdwood count += sprintf(buf + count, "idle "); 652414c70cbSLiam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY) 653414c70cbSLiam Girdwood count += sprintf(buf + count, "standby"); 654414c70cbSLiam Girdwood 655414c70cbSLiam Girdwood printk(KERN_INFO "regulator: %s: %s\n", rdev->desc->name, buf); 656414c70cbSLiam Girdwood } 657414c70cbSLiam Girdwood 658a5766f11SLiam Girdwood /** 659a5766f11SLiam Girdwood * set_machine_constraints - sets regulator constraints 660a5766f11SLiam Girdwood * @regulator: regulator source 661a5766f11SLiam Girdwood * 662a5766f11SLiam Girdwood * Allows platform initialisation code to define and constrain 663a5766f11SLiam Girdwood * regulator circuits e.g. valid voltage/current ranges, etc. NOTE: 664a5766f11SLiam Girdwood * Constraints *must* be set by platform code in order for some 665a5766f11SLiam Girdwood * regulator operations to proceed i.e. set_voltage, set_current_limit, 666a5766f11SLiam Girdwood * set_mode. 667a5766f11SLiam Girdwood */ 668a5766f11SLiam Girdwood static int set_machine_constraints(struct regulator_dev *rdev, 669a5766f11SLiam Girdwood struct regulation_constraints *constraints) 670a5766f11SLiam Girdwood { 671a5766f11SLiam Girdwood int ret = 0; 672e06f5b4fSMark Brown const char *name; 673e5fda26cSMark Brown struct regulator_ops *ops = rdev->desc->ops; 674e06f5b4fSMark Brown 675e06f5b4fSMark Brown if (constraints->name) 676e06f5b4fSMark Brown name = constraints->name; 677e06f5b4fSMark Brown else if (rdev->desc->name) 678e06f5b4fSMark Brown name = rdev->desc->name; 679e06f5b4fSMark Brown else 680e06f5b4fSMark Brown name = "regulator"; 681a5766f11SLiam Girdwood 682a5766f11SLiam Girdwood rdev->constraints = constraints; 683a5766f11SLiam Girdwood 684a5766f11SLiam Girdwood /* do we need to apply the constraint voltage */ 685a5766f11SLiam Girdwood if (rdev->constraints->apply_uV && 686a5766f11SLiam Girdwood rdev->constraints->min_uV == rdev->constraints->max_uV && 687e5fda26cSMark Brown ops->set_voltage) { 688e5fda26cSMark Brown ret = ops->set_voltage(rdev, 689a5766f11SLiam Girdwood rdev->constraints->min_uV, rdev->constraints->max_uV); 690a5766f11SLiam Girdwood if (ret < 0) { 691e06f5b4fSMark Brown printk(KERN_ERR "%s: failed to apply %duV constraint to %s\n", 692e06f5b4fSMark Brown __func__, 693e06f5b4fSMark Brown rdev->constraints->min_uV, name); 694a5766f11SLiam Girdwood rdev->constraints = NULL; 695a5766f11SLiam Girdwood goto out; 696a5766f11SLiam Girdwood } 697a5766f11SLiam Girdwood } 698a5766f11SLiam Girdwood 699a5766f11SLiam Girdwood /* are we enabled at boot time by firmware / bootloader */ 700a5766f11SLiam Girdwood if (rdev->constraints->boot_on) 701a5766f11SLiam Girdwood rdev->use_count = 1; 702a5766f11SLiam Girdwood 703a5766f11SLiam Girdwood /* do we need to setup our suspend state */ 704e06f5b4fSMark Brown if (constraints->initial_state) { 705a5766f11SLiam Girdwood ret = suspend_prepare(rdev, constraints->initial_state); 706e06f5b4fSMark Brown if (ret < 0) { 707e06f5b4fSMark Brown printk(KERN_ERR "%s: failed to set suspend state for %s\n", 708e06f5b4fSMark Brown __func__, name); 709e06f5b4fSMark Brown rdev->constraints = NULL; 710e06f5b4fSMark Brown goto out; 711e06f5b4fSMark Brown } 712e06f5b4fSMark Brown } 713a5766f11SLiam Girdwood 714e5fda26cSMark Brown /* if always_on is set then turn the regulator on if it's not 715e5fda26cSMark Brown * already on. */ 716e5fda26cSMark Brown if (constraints->always_on && ops->enable && 717e5fda26cSMark Brown ((ops->is_enabled && !ops->is_enabled(rdev)) || 718e5fda26cSMark Brown (!ops->is_enabled && !constraints->boot_on))) { 719e5fda26cSMark Brown ret = ops->enable(rdev); 720e5fda26cSMark Brown if (ret < 0) { 721e5fda26cSMark Brown printk(KERN_ERR "%s: failed to enable %s\n", 722e5fda26cSMark Brown __func__, name); 723e5fda26cSMark Brown rdev->constraints = NULL; 724e5fda26cSMark Brown goto out; 725e5fda26cSMark Brown } 726e5fda26cSMark Brown } 727e5fda26cSMark Brown 728a5766f11SLiam Girdwood print_constraints(rdev); 729a5766f11SLiam Girdwood out: 730a5766f11SLiam Girdwood return ret; 731a5766f11SLiam Girdwood } 732a5766f11SLiam Girdwood 733a5766f11SLiam Girdwood /** 734a5766f11SLiam Girdwood * set_supply - set regulator supply regulator 735a5766f11SLiam Girdwood * @regulator: regulator name 736a5766f11SLiam Girdwood * @supply: supply regulator name 737a5766f11SLiam Girdwood * 738a5766f11SLiam Girdwood * Called by platform initialisation code to set the supply regulator for this 739a5766f11SLiam Girdwood * regulator. This ensures that a regulators supply will also be enabled by the 740a5766f11SLiam Girdwood * core if it's child is enabled. 741a5766f11SLiam Girdwood */ 742a5766f11SLiam Girdwood static int set_supply(struct regulator_dev *rdev, 743a5766f11SLiam Girdwood struct regulator_dev *supply_rdev) 744a5766f11SLiam Girdwood { 745a5766f11SLiam Girdwood int err; 746a5766f11SLiam Girdwood 747a5766f11SLiam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &supply_rdev->dev.kobj, 748a5766f11SLiam Girdwood "supply"); 749a5766f11SLiam Girdwood if (err) { 750a5766f11SLiam Girdwood printk(KERN_ERR 751a5766f11SLiam Girdwood "%s: could not add device link %s err %d\n", 752a5766f11SLiam Girdwood __func__, supply_rdev->dev.kobj.name, err); 753a5766f11SLiam Girdwood goto out; 754a5766f11SLiam Girdwood } 755a5766f11SLiam Girdwood rdev->supply = supply_rdev; 756a5766f11SLiam Girdwood list_add(&rdev->slist, &supply_rdev->supply_list); 757a5766f11SLiam Girdwood out: 758a5766f11SLiam Girdwood return err; 759a5766f11SLiam Girdwood } 760a5766f11SLiam Girdwood 761a5766f11SLiam Girdwood /** 762a5766f11SLiam Girdwood * set_consumer_device_supply: Bind a regulator to a symbolic supply 763a5766f11SLiam Girdwood * @regulator: regulator source 764a5766f11SLiam Girdwood * @dev: device the supply applies to 765a5766f11SLiam Girdwood * @supply: symbolic name for supply 766a5766f11SLiam Girdwood * 767a5766f11SLiam Girdwood * Allows platform initialisation code to map physical regulator 768a5766f11SLiam Girdwood * sources to symbolic names for supplies for use by devices. Devices 769a5766f11SLiam Girdwood * should use these symbolic names to request regulators, avoiding the 770a5766f11SLiam Girdwood * need to provide board-specific regulator names as platform data. 771a5766f11SLiam Girdwood */ 772a5766f11SLiam Girdwood static int set_consumer_device_supply(struct regulator_dev *rdev, 773a5766f11SLiam Girdwood struct device *consumer_dev, const char *supply) 774a5766f11SLiam Girdwood { 775a5766f11SLiam Girdwood struct regulator_map *node; 776a5766f11SLiam Girdwood 777a5766f11SLiam Girdwood if (supply == NULL) 778a5766f11SLiam Girdwood return -EINVAL; 779a5766f11SLiam Girdwood 780a5766f11SLiam Girdwood node = kmalloc(sizeof(struct regulator_map), GFP_KERNEL); 781a5766f11SLiam Girdwood if (node == NULL) 782a5766f11SLiam Girdwood return -ENOMEM; 783a5766f11SLiam Girdwood 784a5766f11SLiam Girdwood node->regulator = rdev; 785a5766f11SLiam Girdwood node->dev = consumer_dev; 786a5766f11SLiam Girdwood node->supply = supply; 787a5766f11SLiam Girdwood 788a5766f11SLiam Girdwood list_add(&node->list, ®ulator_map_list); 789a5766f11SLiam Girdwood return 0; 790a5766f11SLiam Girdwood } 791a5766f11SLiam Girdwood 792a5766f11SLiam Girdwood static void unset_consumer_device_supply(struct regulator_dev *rdev, 793a5766f11SLiam Girdwood struct device *consumer_dev) 794a5766f11SLiam Girdwood { 795a5766f11SLiam Girdwood struct regulator_map *node, *n; 796a5766f11SLiam Girdwood 797a5766f11SLiam Girdwood list_for_each_entry_safe(node, n, ®ulator_map_list, list) { 798a5766f11SLiam Girdwood if (rdev == node->regulator && 799a5766f11SLiam Girdwood consumer_dev == node->dev) { 800a5766f11SLiam Girdwood list_del(&node->list); 801a5766f11SLiam Girdwood kfree(node); 802a5766f11SLiam Girdwood return; 803a5766f11SLiam Girdwood } 804a5766f11SLiam Girdwood } 805a5766f11SLiam Girdwood } 806a5766f11SLiam Girdwood 807414c70cbSLiam Girdwood #define REG_STR_SIZE 32 808414c70cbSLiam Girdwood 809414c70cbSLiam Girdwood static struct regulator *create_regulator(struct regulator_dev *rdev, 810414c70cbSLiam Girdwood struct device *dev, 811414c70cbSLiam Girdwood const char *supply_name) 812414c70cbSLiam Girdwood { 813414c70cbSLiam Girdwood struct regulator *regulator; 814414c70cbSLiam Girdwood char buf[REG_STR_SIZE]; 815414c70cbSLiam Girdwood int err, size; 816414c70cbSLiam Girdwood 817414c70cbSLiam Girdwood regulator = kzalloc(sizeof(*regulator), GFP_KERNEL); 818414c70cbSLiam Girdwood if (regulator == NULL) 819414c70cbSLiam Girdwood return NULL; 820414c70cbSLiam Girdwood 821414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 822414c70cbSLiam Girdwood regulator->rdev = rdev; 823414c70cbSLiam Girdwood list_add(®ulator->list, &rdev->consumer_list); 824414c70cbSLiam Girdwood 825414c70cbSLiam Girdwood if (dev) { 826414c70cbSLiam Girdwood /* create a 'requested_microamps_name' sysfs entry */ 827414c70cbSLiam Girdwood size = scnprintf(buf, REG_STR_SIZE, "microamps_requested_%s", 828414c70cbSLiam Girdwood supply_name); 829414c70cbSLiam Girdwood if (size >= REG_STR_SIZE) 830414c70cbSLiam Girdwood goto overflow_err; 831414c70cbSLiam Girdwood 832414c70cbSLiam Girdwood regulator->dev = dev; 833414c70cbSLiam Girdwood regulator->dev_attr.attr.name = kstrdup(buf, GFP_KERNEL); 834414c70cbSLiam Girdwood if (regulator->dev_attr.attr.name == NULL) 835414c70cbSLiam Girdwood goto attr_name_err; 836414c70cbSLiam Girdwood 837414c70cbSLiam Girdwood regulator->dev_attr.attr.owner = THIS_MODULE; 838414c70cbSLiam Girdwood regulator->dev_attr.attr.mode = 0444; 839414c70cbSLiam Girdwood regulator->dev_attr.show = device_requested_uA_show; 840414c70cbSLiam Girdwood err = device_create_file(dev, ®ulator->dev_attr); 841414c70cbSLiam Girdwood if (err < 0) { 842414c70cbSLiam Girdwood printk(KERN_WARNING "%s: could not add regulator_dev" 843414c70cbSLiam Girdwood " load sysfs\n", __func__); 844414c70cbSLiam Girdwood goto attr_name_err; 845414c70cbSLiam Girdwood } 846414c70cbSLiam Girdwood 847414c70cbSLiam Girdwood /* also add a link to the device sysfs entry */ 848414c70cbSLiam Girdwood size = scnprintf(buf, REG_STR_SIZE, "%s-%s", 849414c70cbSLiam Girdwood dev->kobj.name, supply_name); 850414c70cbSLiam Girdwood if (size >= REG_STR_SIZE) 851414c70cbSLiam Girdwood goto attr_err; 852414c70cbSLiam Girdwood 853414c70cbSLiam Girdwood regulator->supply_name = kstrdup(buf, GFP_KERNEL); 854414c70cbSLiam Girdwood if (regulator->supply_name == NULL) 855414c70cbSLiam Girdwood goto attr_err; 856414c70cbSLiam Girdwood 857414c70cbSLiam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &dev->kobj, 858414c70cbSLiam Girdwood buf); 859414c70cbSLiam Girdwood if (err) { 860414c70cbSLiam Girdwood printk(KERN_WARNING 861414c70cbSLiam Girdwood "%s: could not add device link %s err %d\n", 862414c70cbSLiam Girdwood __func__, dev->kobj.name, err); 863414c70cbSLiam Girdwood device_remove_file(dev, ®ulator->dev_attr); 864414c70cbSLiam Girdwood goto link_name_err; 865414c70cbSLiam Girdwood } 866414c70cbSLiam Girdwood } 867414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 868414c70cbSLiam Girdwood return regulator; 869414c70cbSLiam Girdwood link_name_err: 870414c70cbSLiam Girdwood kfree(regulator->supply_name); 871414c70cbSLiam Girdwood attr_err: 872414c70cbSLiam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 873414c70cbSLiam Girdwood attr_name_err: 874414c70cbSLiam Girdwood kfree(regulator->dev_attr.attr.name); 875414c70cbSLiam Girdwood overflow_err: 876414c70cbSLiam Girdwood list_del(®ulator->list); 877414c70cbSLiam Girdwood kfree(regulator); 878414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 879414c70cbSLiam Girdwood return NULL; 880414c70cbSLiam Girdwood } 881414c70cbSLiam Girdwood 882414c70cbSLiam Girdwood /** 883414c70cbSLiam Girdwood * regulator_get - lookup and obtain a reference to a regulator. 884414c70cbSLiam Girdwood * @dev: device for regulator "consumer" 885414c70cbSLiam Girdwood * @id: Supply name or regulator ID. 886414c70cbSLiam Girdwood * 887414c70cbSLiam Girdwood * Returns a struct regulator corresponding to the regulator producer, 888414c70cbSLiam Girdwood * or IS_ERR() condition containing errno. Use of supply names 889414c70cbSLiam Girdwood * configured via regulator_set_device_supply() is strongly 890414c70cbSLiam Girdwood * encouraged. 891414c70cbSLiam Girdwood */ 892414c70cbSLiam Girdwood struct regulator *regulator_get(struct device *dev, const char *id) 893414c70cbSLiam Girdwood { 894414c70cbSLiam Girdwood struct regulator_dev *rdev; 895414c70cbSLiam Girdwood struct regulator_map *map; 896414c70cbSLiam Girdwood struct regulator *regulator = ERR_PTR(-ENODEV); 897414c70cbSLiam Girdwood 898414c70cbSLiam Girdwood if (id == NULL) { 899414c70cbSLiam Girdwood printk(KERN_ERR "regulator: get() with no identifier\n"); 900414c70cbSLiam Girdwood return regulator; 901414c70cbSLiam Girdwood } 902414c70cbSLiam Girdwood 903414c70cbSLiam Girdwood mutex_lock(®ulator_list_mutex); 904414c70cbSLiam Girdwood 905414c70cbSLiam Girdwood list_for_each_entry(map, ®ulator_map_list, list) { 906414c70cbSLiam Girdwood if (dev == map->dev && 907414c70cbSLiam Girdwood strcmp(map->supply, id) == 0) { 908a5766f11SLiam Girdwood rdev = map->regulator; 909414c70cbSLiam Girdwood goto found; 910414c70cbSLiam Girdwood } 911a5766f11SLiam Girdwood } 912414c70cbSLiam Girdwood printk(KERN_ERR "regulator: Unable to get requested regulator: %s\n", 913414c70cbSLiam Girdwood id); 914414c70cbSLiam Girdwood mutex_unlock(®ulator_list_mutex); 915414c70cbSLiam Girdwood return regulator; 916414c70cbSLiam Girdwood 917414c70cbSLiam Girdwood found: 918a5766f11SLiam Girdwood if (!try_module_get(rdev->owner)) 919a5766f11SLiam Girdwood goto out; 920a5766f11SLiam Girdwood 921414c70cbSLiam Girdwood regulator = create_regulator(rdev, dev, id); 922414c70cbSLiam Girdwood if (regulator == NULL) { 923414c70cbSLiam Girdwood regulator = ERR_PTR(-ENOMEM); 924414c70cbSLiam Girdwood module_put(rdev->owner); 925414c70cbSLiam Girdwood } 926414c70cbSLiam Girdwood 927a5766f11SLiam Girdwood out: 928414c70cbSLiam Girdwood mutex_unlock(®ulator_list_mutex); 929414c70cbSLiam Girdwood return regulator; 930414c70cbSLiam Girdwood } 931414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_get); 932414c70cbSLiam Girdwood 933414c70cbSLiam Girdwood /** 934414c70cbSLiam Girdwood * regulator_put - "free" the regulator source 935414c70cbSLiam Girdwood * @regulator: regulator source 936414c70cbSLiam Girdwood * 937414c70cbSLiam Girdwood * Note: drivers must ensure that all regulator_enable calls made on this 938414c70cbSLiam Girdwood * regulator source are balanced by regulator_disable calls prior to calling 939414c70cbSLiam Girdwood * this function. 940414c70cbSLiam Girdwood */ 941414c70cbSLiam Girdwood void regulator_put(struct regulator *regulator) 942414c70cbSLiam Girdwood { 943414c70cbSLiam Girdwood struct regulator_dev *rdev; 944414c70cbSLiam Girdwood 945414c70cbSLiam Girdwood if (regulator == NULL || IS_ERR(regulator)) 946414c70cbSLiam Girdwood return; 947414c70cbSLiam Girdwood 948414c70cbSLiam Girdwood if (regulator->enabled) { 949414c70cbSLiam Girdwood printk(KERN_WARNING "Releasing supply %s while enabled\n", 950414c70cbSLiam Girdwood regulator->supply_name); 951414c70cbSLiam Girdwood WARN_ON(regulator->enabled); 952414c70cbSLiam Girdwood regulator_disable(regulator); 953414c70cbSLiam Girdwood } 954414c70cbSLiam Girdwood 955414c70cbSLiam Girdwood mutex_lock(®ulator_list_mutex); 956414c70cbSLiam Girdwood rdev = regulator->rdev; 957414c70cbSLiam Girdwood 958414c70cbSLiam Girdwood /* remove any sysfs entries */ 959414c70cbSLiam Girdwood if (regulator->dev) { 960414c70cbSLiam Girdwood sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name); 961414c70cbSLiam Girdwood kfree(regulator->supply_name); 962414c70cbSLiam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 963414c70cbSLiam Girdwood kfree(regulator->dev_attr.attr.name); 964414c70cbSLiam Girdwood } 965414c70cbSLiam Girdwood list_del(®ulator->list); 966414c70cbSLiam Girdwood kfree(regulator); 967414c70cbSLiam Girdwood 968414c70cbSLiam Girdwood module_put(rdev->owner); 969414c70cbSLiam Girdwood mutex_unlock(®ulator_list_mutex); 970414c70cbSLiam Girdwood } 971414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_put); 972414c70cbSLiam Girdwood 973414c70cbSLiam Girdwood /* locks held by regulator_enable() */ 974414c70cbSLiam Girdwood static int _regulator_enable(struct regulator_dev *rdev) 975414c70cbSLiam Girdwood { 976414c70cbSLiam Girdwood int ret = -EINVAL; 977414c70cbSLiam Girdwood 978414c70cbSLiam Girdwood if (!rdev->constraints) { 979414c70cbSLiam Girdwood printk(KERN_ERR "%s: %s has no constraints\n", 980414c70cbSLiam Girdwood __func__, rdev->desc->name); 981414c70cbSLiam Girdwood return ret; 982414c70cbSLiam Girdwood } 983414c70cbSLiam Girdwood 984414c70cbSLiam Girdwood /* do we need to enable the supply regulator first */ 985414c70cbSLiam Girdwood if (rdev->supply) { 986414c70cbSLiam Girdwood ret = _regulator_enable(rdev->supply); 987414c70cbSLiam Girdwood if (ret < 0) { 988414c70cbSLiam Girdwood printk(KERN_ERR "%s: failed to enable %s: %d\n", 989414c70cbSLiam Girdwood __func__, rdev->desc->name, ret); 990414c70cbSLiam Girdwood return ret; 991414c70cbSLiam Girdwood } 992414c70cbSLiam Girdwood } 993414c70cbSLiam Girdwood 994414c70cbSLiam Girdwood /* check voltage and requested load before enabling */ 995414c70cbSLiam Girdwood if (rdev->desc->ops->enable) { 996414c70cbSLiam Girdwood 997414c70cbSLiam Girdwood if (rdev->constraints && 998414c70cbSLiam Girdwood (rdev->constraints->valid_ops_mask & 999414c70cbSLiam Girdwood REGULATOR_CHANGE_DRMS)) 1000414c70cbSLiam Girdwood drms_uA_update(rdev); 1001414c70cbSLiam Girdwood 1002414c70cbSLiam Girdwood ret = rdev->desc->ops->enable(rdev); 1003414c70cbSLiam Girdwood if (ret < 0) { 1004414c70cbSLiam Girdwood printk(KERN_ERR "%s: failed to enable %s: %d\n", 1005414c70cbSLiam Girdwood __func__, rdev->desc->name, ret); 1006414c70cbSLiam Girdwood return ret; 1007414c70cbSLiam Girdwood } 1008414c70cbSLiam Girdwood rdev->use_count++; 1009414c70cbSLiam Girdwood return ret; 1010414c70cbSLiam Girdwood } 1011414c70cbSLiam Girdwood 1012414c70cbSLiam Girdwood return ret; 1013414c70cbSLiam Girdwood } 1014414c70cbSLiam Girdwood 1015414c70cbSLiam Girdwood /** 1016414c70cbSLiam Girdwood * regulator_enable - enable regulator output 1017414c70cbSLiam Girdwood * @regulator: regulator source 1018414c70cbSLiam Girdwood * 1019414c70cbSLiam Girdwood * Enable the regulator output at the predefined voltage or current value. 1020414c70cbSLiam Girdwood * NOTE: the output value can be set by other drivers, boot loader or may be 1021414c70cbSLiam Girdwood * hardwired in the regulator. 1022414c70cbSLiam Girdwood * NOTE: calls to regulator_enable() must be balanced with calls to 1023414c70cbSLiam Girdwood * regulator_disable(). 1024414c70cbSLiam Girdwood */ 1025414c70cbSLiam Girdwood int regulator_enable(struct regulator *regulator) 1026414c70cbSLiam Girdwood { 1027414c70cbSLiam Girdwood int ret; 1028414c70cbSLiam Girdwood 1029414c70cbSLiam Girdwood if (regulator->enabled) { 1030414c70cbSLiam Girdwood printk(KERN_CRIT "Regulator %s already enabled\n", 1031414c70cbSLiam Girdwood regulator->supply_name); 1032414c70cbSLiam Girdwood WARN_ON(regulator->enabled); 1033414c70cbSLiam Girdwood return 0; 1034414c70cbSLiam Girdwood } 1035414c70cbSLiam Girdwood 1036414c70cbSLiam Girdwood mutex_lock(®ulator->rdev->mutex); 1037414c70cbSLiam Girdwood regulator->enabled = 1; 1038414c70cbSLiam Girdwood ret = _regulator_enable(regulator->rdev); 1039414c70cbSLiam Girdwood if (ret != 0) 1040414c70cbSLiam Girdwood regulator->enabled = 0; 1041414c70cbSLiam Girdwood mutex_unlock(®ulator->rdev->mutex); 1042414c70cbSLiam Girdwood return ret; 1043414c70cbSLiam Girdwood } 1044414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_enable); 1045414c70cbSLiam Girdwood 1046414c70cbSLiam Girdwood /* locks held by regulator_disable() */ 1047414c70cbSLiam Girdwood static int _regulator_disable(struct regulator_dev *rdev) 1048414c70cbSLiam Girdwood { 1049414c70cbSLiam Girdwood int ret = 0; 1050414c70cbSLiam Girdwood 1051414c70cbSLiam Girdwood /* are we the last user and permitted to disable ? */ 1052414c70cbSLiam Girdwood if (rdev->use_count == 1 && !rdev->constraints->always_on) { 1053414c70cbSLiam Girdwood 1054414c70cbSLiam Girdwood /* we are last user */ 1055414c70cbSLiam Girdwood if (rdev->desc->ops->disable) { 1056414c70cbSLiam Girdwood ret = rdev->desc->ops->disable(rdev); 1057414c70cbSLiam Girdwood if (ret < 0) { 1058414c70cbSLiam Girdwood printk(KERN_ERR "%s: failed to disable %s\n", 1059414c70cbSLiam Girdwood __func__, rdev->desc->name); 1060414c70cbSLiam Girdwood return ret; 1061414c70cbSLiam Girdwood } 1062414c70cbSLiam Girdwood } 1063414c70cbSLiam Girdwood 1064414c70cbSLiam Girdwood /* decrease our supplies ref count and disable if required */ 1065414c70cbSLiam Girdwood if (rdev->supply) 1066414c70cbSLiam Girdwood _regulator_disable(rdev->supply); 1067414c70cbSLiam Girdwood 1068414c70cbSLiam Girdwood rdev->use_count = 0; 1069414c70cbSLiam Girdwood } else if (rdev->use_count > 1) { 1070414c70cbSLiam Girdwood 1071414c70cbSLiam Girdwood if (rdev->constraints && 1072414c70cbSLiam Girdwood (rdev->constraints->valid_ops_mask & 1073414c70cbSLiam Girdwood REGULATOR_CHANGE_DRMS)) 1074414c70cbSLiam Girdwood drms_uA_update(rdev); 1075414c70cbSLiam Girdwood 1076414c70cbSLiam Girdwood rdev->use_count--; 1077414c70cbSLiam Girdwood } 1078414c70cbSLiam Girdwood return ret; 1079414c70cbSLiam Girdwood } 1080414c70cbSLiam Girdwood 1081414c70cbSLiam Girdwood /** 1082414c70cbSLiam Girdwood * regulator_disable - disable regulator output 1083414c70cbSLiam Girdwood * @regulator: regulator source 1084414c70cbSLiam Girdwood * 1085414c70cbSLiam Girdwood * Disable the regulator output voltage or current. 1086414c70cbSLiam Girdwood * NOTE: this will only disable the regulator output if no other consumer 1087414c70cbSLiam Girdwood * devices have it enabled. 1088414c70cbSLiam Girdwood * NOTE: calls to regulator_enable() must be balanced with calls to 1089414c70cbSLiam Girdwood * regulator_disable(). 1090414c70cbSLiam Girdwood */ 1091414c70cbSLiam Girdwood int regulator_disable(struct regulator *regulator) 1092414c70cbSLiam Girdwood { 1093414c70cbSLiam Girdwood int ret; 1094414c70cbSLiam Girdwood 1095414c70cbSLiam Girdwood if (!regulator->enabled) { 1096414c70cbSLiam Girdwood printk(KERN_ERR "%s: not in use by this consumer\n", 1097414c70cbSLiam Girdwood __func__); 1098414c70cbSLiam Girdwood return 0; 1099414c70cbSLiam Girdwood } 1100414c70cbSLiam Girdwood 1101414c70cbSLiam Girdwood mutex_lock(®ulator->rdev->mutex); 1102414c70cbSLiam Girdwood regulator->enabled = 0; 1103414c70cbSLiam Girdwood regulator->uA_load = 0; 1104414c70cbSLiam Girdwood ret = _regulator_disable(regulator->rdev); 1105414c70cbSLiam Girdwood mutex_unlock(®ulator->rdev->mutex); 1106414c70cbSLiam Girdwood return ret; 1107414c70cbSLiam Girdwood } 1108414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_disable); 1109414c70cbSLiam Girdwood 1110414c70cbSLiam Girdwood /* locks held by regulator_force_disable() */ 1111414c70cbSLiam Girdwood static int _regulator_force_disable(struct regulator_dev *rdev) 1112414c70cbSLiam Girdwood { 1113414c70cbSLiam Girdwood int ret = 0; 1114414c70cbSLiam Girdwood 1115414c70cbSLiam Girdwood /* force disable */ 1116414c70cbSLiam Girdwood if (rdev->desc->ops->disable) { 1117414c70cbSLiam Girdwood /* ah well, who wants to live forever... */ 1118414c70cbSLiam Girdwood ret = rdev->desc->ops->disable(rdev); 1119414c70cbSLiam Girdwood if (ret < 0) { 1120414c70cbSLiam Girdwood printk(KERN_ERR "%s: failed to force disable %s\n", 1121414c70cbSLiam Girdwood __func__, rdev->desc->name); 1122414c70cbSLiam Girdwood return ret; 1123414c70cbSLiam Girdwood } 1124414c70cbSLiam Girdwood /* notify other consumers that power has been forced off */ 1125414c70cbSLiam Girdwood _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE, 1126414c70cbSLiam Girdwood NULL); 1127414c70cbSLiam Girdwood } 1128414c70cbSLiam Girdwood 1129414c70cbSLiam Girdwood /* decrease our supplies ref count and disable if required */ 1130414c70cbSLiam Girdwood if (rdev->supply) 1131414c70cbSLiam Girdwood _regulator_disable(rdev->supply); 1132414c70cbSLiam Girdwood 1133414c70cbSLiam Girdwood rdev->use_count = 0; 1134414c70cbSLiam Girdwood return ret; 1135414c70cbSLiam Girdwood } 1136414c70cbSLiam Girdwood 1137414c70cbSLiam Girdwood /** 1138414c70cbSLiam Girdwood * regulator_force_disable - force disable regulator output 1139414c70cbSLiam Girdwood * @regulator: regulator source 1140414c70cbSLiam Girdwood * 1141414c70cbSLiam Girdwood * Forcibly disable the regulator output voltage or current. 1142414c70cbSLiam Girdwood * NOTE: this *will* disable the regulator output even if other consumer 1143414c70cbSLiam Girdwood * devices have it enabled. This should be used for situations when device 1144414c70cbSLiam Girdwood * damage will likely occur if the regulator is not disabled (e.g. over temp). 1145414c70cbSLiam Girdwood */ 1146414c70cbSLiam Girdwood int regulator_force_disable(struct regulator *regulator) 1147414c70cbSLiam Girdwood { 1148414c70cbSLiam Girdwood int ret; 1149414c70cbSLiam Girdwood 1150414c70cbSLiam Girdwood mutex_lock(®ulator->rdev->mutex); 1151414c70cbSLiam Girdwood regulator->enabled = 0; 1152414c70cbSLiam Girdwood regulator->uA_load = 0; 1153414c70cbSLiam Girdwood ret = _regulator_force_disable(regulator->rdev); 1154414c70cbSLiam Girdwood mutex_unlock(®ulator->rdev->mutex); 1155414c70cbSLiam Girdwood return ret; 1156414c70cbSLiam Girdwood } 1157414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_force_disable); 1158414c70cbSLiam Girdwood 1159414c70cbSLiam Girdwood static int _regulator_is_enabled(struct regulator_dev *rdev) 1160414c70cbSLiam Girdwood { 1161414c70cbSLiam Girdwood int ret; 1162414c70cbSLiam Girdwood 1163414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 1164414c70cbSLiam Girdwood 1165414c70cbSLiam Girdwood /* sanity check */ 1166414c70cbSLiam Girdwood if (!rdev->desc->ops->is_enabled) { 1167414c70cbSLiam Girdwood ret = -EINVAL; 1168414c70cbSLiam Girdwood goto out; 1169414c70cbSLiam Girdwood } 1170414c70cbSLiam Girdwood 1171414c70cbSLiam Girdwood ret = rdev->desc->ops->is_enabled(rdev); 1172414c70cbSLiam Girdwood out: 1173414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 1174414c70cbSLiam Girdwood return ret; 1175414c70cbSLiam Girdwood } 1176414c70cbSLiam Girdwood 1177414c70cbSLiam Girdwood /** 1178414c70cbSLiam Girdwood * regulator_is_enabled - is the regulator output enabled 1179414c70cbSLiam Girdwood * @regulator: regulator source 1180414c70cbSLiam Girdwood * 1181414c70cbSLiam Girdwood * Returns zero for disabled otherwise return number of enable requests. 1182414c70cbSLiam Girdwood */ 1183414c70cbSLiam Girdwood int regulator_is_enabled(struct regulator *regulator) 1184414c70cbSLiam Girdwood { 1185414c70cbSLiam Girdwood return _regulator_is_enabled(regulator->rdev); 1186414c70cbSLiam Girdwood } 1187414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_is_enabled); 1188414c70cbSLiam Girdwood 1189414c70cbSLiam Girdwood /** 1190414c70cbSLiam Girdwood * regulator_set_voltage - set regulator output voltage 1191414c70cbSLiam Girdwood * @regulator: regulator source 1192414c70cbSLiam Girdwood * @min_uV: Minimum required voltage in uV 1193414c70cbSLiam Girdwood * @max_uV: Maximum acceptable voltage in uV 1194414c70cbSLiam Girdwood * 1195414c70cbSLiam Girdwood * Sets a voltage regulator to the desired output voltage. This can be set 1196414c70cbSLiam Girdwood * during any regulator state. IOW, regulator can be disabled or enabled. 1197414c70cbSLiam Girdwood * 1198414c70cbSLiam Girdwood * If the regulator is enabled then the voltage will change to the new value 1199414c70cbSLiam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1200414c70cbSLiam Girdwood * output at the new voltage when enabled. 1201414c70cbSLiam Girdwood * 1202414c70cbSLiam Girdwood * NOTE: If the regulator is shared between several devices then the lowest 1203414c70cbSLiam Girdwood * request voltage that meets the system constraints will be used. 1204414c70cbSLiam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1205414c70cbSLiam Girdwood * calling this function otherwise this call will fail. 1206414c70cbSLiam Girdwood */ 1207414c70cbSLiam Girdwood int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) 1208414c70cbSLiam Girdwood { 1209414c70cbSLiam Girdwood struct regulator_dev *rdev = regulator->rdev; 1210414c70cbSLiam Girdwood int ret; 1211414c70cbSLiam Girdwood 1212414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 1213414c70cbSLiam Girdwood 1214414c70cbSLiam Girdwood /* sanity check */ 1215414c70cbSLiam Girdwood if (!rdev->desc->ops->set_voltage) { 1216414c70cbSLiam Girdwood ret = -EINVAL; 1217414c70cbSLiam Girdwood goto out; 1218414c70cbSLiam Girdwood } 1219414c70cbSLiam Girdwood 1220414c70cbSLiam Girdwood /* constraints check */ 1221414c70cbSLiam Girdwood ret = regulator_check_voltage(rdev, &min_uV, &max_uV); 1222414c70cbSLiam Girdwood if (ret < 0) 1223414c70cbSLiam Girdwood goto out; 1224414c70cbSLiam Girdwood regulator->min_uV = min_uV; 1225414c70cbSLiam Girdwood regulator->max_uV = max_uV; 1226414c70cbSLiam Girdwood ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV); 1227414c70cbSLiam Girdwood 1228414c70cbSLiam Girdwood out: 1229414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 1230414c70cbSLiam Girdwood return ret; 1231414c70cbSLiam Girdwood } 1232414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_set_voltage); 1233414c70cbSLiam Girdwood 1234414c70cbSLiam Girdwood static int _regulator_get_voltage(struct regulator_dev *rdev) 1235414c70cbSLiam Girdwood { 1236414c70cbSLiam Girdwood /* sanity check */ 1237414c70cbSLiam Girdwood if (rdev->desc->ops->get_voltage) 1238414c70cbSLiam Girdwood return rdev->desc->ops->get_voltage(rdev); 1239414c70cbSLiam Girdwood else 1240414c70cbSLiam Girdwood return -EINVAL; 1241414c70cbSLiam Girdwood } 1242414c70cbSLiam Girdwood 1243414c70cbSLiam Girdwood /** 1244414c70cbSLiam Girdwood * regulator_get_voltage - get regulator output voltage 1245414c70cbSLiam Girdwood * @regulator: regulator source 1246414c70cbSLiam Girdwood * 1247414c70cbSLiam Girdwood * This returns the current regulator voltage in uV. 1248414c70cbSLiam Girdwood * 1249414c70cbSLiam Girdwood * NOTE: If the regulator is disabled it will return the voltage value. This 1250414c70cbSLiam Girdwood * function should not be used to determine regulator state. 1251414c70cbSLiam Girdwood */ 1252414c70cbSLiam Girdwood int regulator_get_voltage(struct regulator *regulator) 1253414c70cbSLiam Girdwood { 1254414c70cbSLiam Girdwood int ret; 1255414c70cbSLiam Girdwood 1256414c70cbSLiam Girdwood mutex_lock(®ulator->rdev->mutex); 1257414c70cbSLiam Girdwood 1258414c70cbSLiam Girdwood ret = _regulator_get_voltage(regulator->rdev); 1259414c70cbSLiam Girdwood 1260414c70cbSLiam Girdwood mutex_unlock(®ulator->rdev->mutex); 1261414c70cbSLiam Girdwood 1262414c70cbSLiam Girdwood return ret; 1263414c70cbSLiam Girdwood } 1264414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_get_voltage); 1265414c70cbSLiam Girdwood 1266414c70cbSLiam Girdwood /** 1267414c70cbSLiam Girdwood * regulator_set_current_limit - set regulator output current limit 1268414c70cbSLiam Girdwood * @regulator: regulator source 1269414c70cbSLiam Girdwood * @min_uA: Minimuum supported current in uA 1270414c70cbSLiam Girdwood * @max_uA: Maximum supported current in uA 1271414c70cbSLiam Girdwood * 1272414c70cbSLiam Girdwood * Sets current sink to the desired output current. This can be set during 1273414c70cbSLiam Girdwood * any regulator state. IOW, regulator can be disabled or enabled. 1274414c70cbSLiam Girdwood * 1275414c70cbSLiam Girdwood * If the regulator is enabled then the current will change to the new value 1276414c70cbSLiam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1277414c70cbSLiam Girdwood * output at the new current when enabled. 1278414c70cbSLiam Girdwood * 1279414c70cbSLiam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1280414c70cbSLiam Girdwood * calling this function otherwise this call will fail. 1281414c70cbSLiam Girdwood */ 1282414c70cbSLiam Girdwood int regulator_set_current_limit(struct regulator *regulator, 1283414c70cbSLiam Girdwood int min_uA, int max_uA) 1284414c70cbSLiam Girdwood { 1285414c70cbSLiam Girdwood struct regulator_dev *rdev = regulator->rdev; 1286414c70cbSLiam Girdwood int ret; 1287414c70cbSLiam Girdwood 1288414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 1289414c70cbSLiam Girdwood 1290414c70cbSLiam Girdwood /* sanity check */ 1291414c70cbSLiam Girdwood if (!rdev->desc->ops->set_current_limit) { 1292414c70cbSLiam Girdwood ret = -EINVAL; 1293414c70cbSLiam Girdwood goto out; 1294414c70cbSLiam Girdwood } 1295414c70cbSLiam Girdwood 1296414c70cbSLiam Girdwood /* constraints check */ 1297414c70cbSLiam Girdwood ret = regulator_check_current_limit(rdev, &min_uA, &max_uA); 1298414c70cbSLiam Girdwood if (ret < 0) 1299414c70cbSLiam Girdwood goto out; 1300414c70cbSLiam Girdwood 1301414c70cbSLiam Girdwood ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA); 1302414c70cbSLiam Girdwood out: 1303414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 1304414c70cbSLiam Girdwood return ret; 1305414c70cbSLiam Girdwood } 1306414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_set_current_limit); 1307414c70cbSLiam Girdwood 1308414c70cbSLiam Girdwood static int _regulator_get_current_limit(struct regulator_dev *rdev) 1309414c70cbSLiam Girdwood { 1310414c70cbSLiam Girdwood int ret; 1311414c70cbSLiam Girdwood 1312414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 1313414c70cbSLiam Girdwood 1314414c70cbSLiam Girdwood /* sanity check */ 1315414c70cbSLiam Girdwood if (!rdev->desc->ops->get_current_limit) { 1316414c70cbSLiam Girdwood ret = -EINVAL; 1317414c70cbSLiam Girdwood goto out; 1318414c70cbSLiam Girdwood } 1319414c70cbSLiam Girdwood 1320414c70cbSLiam Girdwood ret = rdev->desc->ops->get_current_limit(rdev); 1321414c70cbSLiam Girdwood out: 1322414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 1323414c70cbSLiam Girdwood return ret; 1324414c70cbSLiam Girdwood } 1325414c70cbSLiam Girdwood 1326414c70cbSLiam Girdwood /** 1327414c70cbSLiam Girdwood * regulator_get_current_limit - get regulator output current 1328414c70cbSLiam Girdwood * @regulator: regulator source 1329414c70cbSLiam Girdwood * 1330414c70cbSLiam Girdwood * This returns the current supplied by the specified current sink in uA. 1331414c70cbSLiam Girdwood * 1332414c70cbSLiam Girdwood * NOTE: If the regulator is disabled it will return the current value. This 1333414c70cbSLiam Girdwood * function should not be used to determine regulator state. 1334414c70cbSLiam Girdwood */ 1335414c70cbSLiam Girdwood int regulator_get_current_limit(struct regulator *regulator) 1336414c70cbSLiam Girdwood { 1337414c70cbSLiam Girdwood return _regulator_get_current_limit(regulator->rdev); 1338414c70cbSLiam Girdwood } 1339414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_get_current_limit); 1340414c70cbSLiam Girdwood 1341414c70cbSLiam Girdwood /** 1342414c70cbSLiam Girdwood * regulator_set_mode - set regulator operating mode 1343414c70cbSLiam Girdwood * @regulator: regulator source 1344414c70cbSLiam Girdwood * @mode: operating mode - one of the REGULATOR_MODE constants 1345414c70cbSLiam Girdwood * 1346414c70cbSLiam Girdwood * Set regulator operating mode to increase regulator efficiency or improve 1347414c70cbSLiam Girdwood * regulation performance. 1348414c70cbSLiam Girdwood * 1349414c70cbSLiam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1350414c70cbSLiam Girdwood * calling this function otherwise this call will fail. 1351414c70cbSLiam Girdwood */ 1352414c70cbSLiam Girdwood int regulator_set_mode(struct regulator *regulator, unsigned int mode) 1353414c70cbSLiam Girdwood { 1354414c70cbSLiam Girdwood struct regulator_dev *rdev = regulator->rdev; 1355414c70cbSLiam Girdwood int ret; 1356414c70cbSLiam Girdwood 1357414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 1358414c70cbSLiam Girdwood 1359414c70cbSLiam Girdwood /* sanity check */ 1360414c70cbSLiam Girdwood if (!rdev->desc->ops->set_mode) { 1361414c70cbSLiam Girdwood ret = -EINVAL; 1362414c70cbSLiam Girdwood goto out; 1363414c70cbSLiam Girdwood } 1364414c70cbSLiam Girdwood 1365414c70cbSLiam Girdwood /* constraints check */ 1366414c70cbSLiam Girdwood ret = regulator_check_mode(rdev, mode); 1367414c70cbSLiam Girdwood if (ret < 0) 1368414c70cbSLiam Girdwood goto out; 1369414c70cbSLiam Girdwood 1370414c70cbSLiam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1371414c70cbSLiam Girdwood out: 1372414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 1373414c70cbSLiam Girdwood return ret; 1374414c70cbSLiam Girdwood } 1375414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_set_mode); 1376414c70cbSLiam Girdwood 1377414c70cbSLiam Girdwood static unsigned int _regulator_get_mode(struct regulator_dev *rdev) 1378414c70cbSLiam Girdwood { 1379414c70cbSLiam Girdwood int ret; 1380414c70cbSLiam Girdwood 1381414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 1382414c70cbSLiam Girdwood 1383414c70cbSLiam Girdwood /* sanity check */ 1384414c70cbSLiam Girdwood if (!rdev->desc->ops->get_mode) { 1385414c70cbSLiam Girdwood ret = -EINVAL; 1386414c70cbSLiam Girdwood goto out; 1387414c70cbSLiam Girdwood } 1388414c70cbSLiam Girdwood 1389414c70cbSLiam Girdwood ret = rdev->desc->ops->get_mode(rdev); 1390414c70cbSLiam Girdwood out: 1391414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 1392414c70cbSLiam Girdwood return ret; 1393414c70cbSLiam Girdwood } 1394414c70cbSLiam Girdwood 1395414c70cbSLiam Girdwood /** 1396414c70cbSLiam Girdwood * regulator_get_mode - get regulator operating mode 1397414c70cbSLiam Girdwood * @regulator: regulator source 1398414c70cbSLiam Girdwood * 1399414c70cbSLiam Girdwood * Get the current regulator operating mode. 1400414c70cbSLiam Girdwood */ 1401414c70cbSLiam Girdwood unsigned int regulator_get_mode(struct regulator *regulator) 1402414c70cbSLiam Girdwood { 1403414c70cbSLiam Girdwood return _regulator_get_mode(regulator->rdev); 1404414c70cbSLiam Girdwood } 1405414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_get_mode); 1406414c70cbSLiam Girdwood 1407414c70cbSLiam Girdwood /** 1408414c70cbSLiam Girdwood * regulator_set_optimum_mode - set regulator optimum operating mode 1409414c70cbSLiam Girdwood * @regulator: regulator source 1410414c70cbSLiam Girdwood * @uA_load: load current 1411414c70cbSLiam Girdwood * 1412414c70cbSLiam Girdwood * Notifies the regulator core of a new device load. This is then used by 1413414c70cbSLiam Girdwood * DRMS (if enabled by constraints) to set the most efficient regulator 1414414c70cbSLiam Girdwood * operating mode for the new regulator loading. 1415414c70cbSLiam Girdwood * 1416414c70cbSLiam Girdwood * Consumer devices notify their supply regulator of the maximum power 1417414c70cbSLiam Girdwood * they will require (can be taken from device datasheet in the power 1418414c70cbSLiam Girdwood * consumption tables) when they change operational status and hence power 1419414c70cbSLiam Girdwood * state. Examples of operational state changes that can affect power 1420414c70cbSLiam Girdwood * consumption are :- 1421414c70cbSLiam Girdwood * 1422414c70cbSLiam Girdwood * o Device is opened / closed. 1423414c70cbSLiam Girdwood * o Device I/O is about to begin or has just finished. 1424414c70cbSLiam Girdwood * o Device is idling in between work. 1425414c70cbSLiam Girdwood * 1426414c70cbSLiam Girdwood * This information is also exported via sysfs to userspace. 1427414c70cbSLiam Girdwood * 1428414c70cbSLiam Girdwood * DRMS will sum the total requested load on the regulator and change 1429414c70cbSLiam Girdwood * to the most efficient operating mode if platform constraints allow. 1430414c70cbSLiam Girdwood * 1431414c70cbSLiam Girdwood * Returns the new regulator mode or error. 1432414c70cbSLiam Girdwood */ 1433414c70cbSLiam Girdwood int regulator_set_optimum_mode(struct regulator *regulator, int uA_load) 1434414c70cbSLiam Girdwood { 1435414c70cbSLiam Girdwood struct regulator_dev *rdev = regulator->rdev; 1436414c70cbSLiam Girdwood struct regulator *consumer; 1437414c70cbSLiam Girdwood int ret, output_uV, input_uV, total_uA_load = 0; 1438414c70cbSLiam Girdwood unsigned int mode; 1439414c70cbSLiam Girdwood 1440414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 1441414c70cbSLiam Girdwood 1442414c70cbSLiam Girdwood regulator->uA_load = uA_load; 1443414c70cbSLiam Girdwood ret = regulator_check_drms(rdev); 1444414c70cbSLiam Girdwood if (ret < 0) 1445414c70cbSLiam Girdwood goto out; 1446414c70cbSLiam Girdwood ret = -EINVAL; 1447414c70cbSLiam Girdwood 1448414c70cbSLiam Girdwood /* sanity check */ 1449414c70cbSLiam Girdwood if (!rdev->desc->ops->get_optimum_mode) 1450414c70cbSLiam Girdwood goto out; 1451414c70cbSLiam Girdwood 1452414c70cbSLiam Girdwood /* get output voltage */ 1453414c70cbSLiam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 1454414c70cbSLiam Girdwood if (output_uV <= 0) { 1455414c70cbSLiam Girdwood printk(KERN_ERR "%s: invalid output voltage found for %s\n", 1456414c70cbSLiam Girdwood __func__, rdev->desc->name); 1457414c70cbSLiam Girdwood goto out; 1458414c70cbSLiam Girdwood } 1459414c70cbSLiam Girdwood 1460414c70cbSLiam Girdwood /* get input voltage */ 1461414c70cbSLiam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 1462414c70cbSLiam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 1463414c70cbSLiam Girdwood else 1464414c70cbSLiam Girdwood input_uV = rdev->constraints->input_uV; 1465414c70cbSLiam Girdwood if (input_uV <= 0) { 1466414c70cbSLiam Girdwood printk(KERN_ERR "%s: invalid input voltage found for %s\n", 1467414c70cbSLiam Girdwood __func__, rdev->desc->name); 1468414c70cbSLiam Girdwood goto out; 1469414c70cbSLiam Girdwood } 1470414c70cbSLiam Girdwood 1471414c70cbSLiam Girdwood /* calc total requested load for this regulator */ 1472414c70cbSLiam Girdwood list_for_each_entry(consumer, &rdev->consumer_list, list) 1473414c70cbSLiam Girdwood total_uA_load += consumer->uA_load; 1474414c70cbSLiam Girdwood 1475414c70cbSLiam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, 1476414c70cbSLiam Girdwood input_uV, output_uV, 1477414c70cbSLiam Girdwood total_uA_load); 1478414c70cbSLiam Girdwood if (ret <= 0) { 1479414c70cbSLiam Girdwood printk(KERN_ERR "%s: failed to get optimum mode for %s @" 1480414c70cbSLiam Girdwood " %d uA %d -> %d uV\n", __func__, rdev->desc->name, 1481414c70cbSLiam Girdwood total_uA_load, input_uV, output_uV); 1482414c70cbSLiam Girdwood goto out; 1483414c70cbSLiam Girdwood } 1484414c70cbSLiam Girdwood 1485414c70cbSLiam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1486414c70cbSLiam Girdwood if (ret <= 0) { 1487414c70cbSLiam Girdwood printk(KERN_ERR "%s: failed to set optimum mode %x for %s\n", 1488414c70cbSLiam Girdwood __func__, mode, rdev->desc->name); 1489414c70cbSLiam Girdwood goto out; 1490414c70cbSLiam Girdwood } 1491414c70cbSLiam Girdwood ret = mode; 1492414c70cbSLiam Girdwood out: 1493414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 1494414c70cbSLiam Girdwood return ret; 1495414c70cbSLiam Girdwood } 1496414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_set_optimum_mode); 1497414c70cbSLiam Girdwood 1498414c70cbSLiam Girdwood /** 1499414c70cbSLiam Girdwood * regulator_register_notifier - register regulator event notifier 1500414c70cbSLiam Girdwood * @regulator: regulator source 1501414c70cbSLiam Girdwood * @notifier_block: notifier block 1502414c70cbSLiam Girdwood * 1503414c70cbSLiam Girdwood * Register notifier block to receive regulator events. 1504414c70cbSLiam Girdwood */ 1505414c70cbSLiam Girdwood int regulator_register_notifier(struct regulator *regulator, 1506414c70cbSLiam Girdwood struct notifier_block *nb) 1507414c70cbSLiam Girdwood { 1508414c70cbSLiam Girdwood return blocking_notifier_chain_register(®ulator->rdev->notifier, 1509414c70cbSLiam Girdwood nb); 1510414c70cbSLiam Girdwood } 1511414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_register_notifier); 1512414c70cbSLiam Girdwood 1513414c70cbSLiam Girdwood /** 1514414c70cbSLiam Girdwood * regulator_unregister_notifier - unregister regulator event notifier 1515414c70cbSLiam Girdwood * @regulator: regulator source 1516414c70cbSLiam Girdwood * @notifier_block: notifier block 1517414c70cbSLiam Girdwood * 1518414c70cbSLiam Girdwood * Unregister regulator event notifier block. 1519414c70cbSLiam Girdwood */ 1520414c70cbSLiam Girdwood int regulator_unregister_notifier(struct regulator *regulator, 1521414c70cbSLiam Girdwood struct notifier_block *nb) 1522414c70cbSLiam Girdwood { 1523414c70cbSLiam Girdwood return blocking_notifier_chain_unregister(®ulator->rdev->notifier, 1524414c70cbSLiam Girdwood nb); 1525414c70cbSLiam Girdwood } 1526414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_unregister_notifier); 1527414c70cbSLiam Girdwood 1528414c70cbSLiam Girdwood /* notify regulator consumers and downstream regulator consumers */ 1529414c70cbSLiam Girdwood static void _notifier_call_chain(struct regulator_dev *rdev, 1530414c70cbSLiam Girdwood unsigned long event, void *data) 1531414c70cbSLiam Girdwood { 1532414c70cbSLiam Girdwood struct regulator_dev *_rdev; 1533414c70cbSLiam Girdwood 1534414c70cbSLiam Girdwood /* call rdev chain first */ 1535414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 1536414c70cbSLiam Girdwood blocking_notifier_call_chain(&rdev->notifier, event, NULL); 1537414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 1538414c70cbSLiam Girdwood 1539414c70cbSLiam Girdwood /* now notify regulator we supply */ 1540414c70cbSLiam Girdwood list_for_each_entry(_rdev, &rdev->supply_list, slist) 1541414c70cbSLiam Girdwood _notifier_call_chain(_rdev, event, data); 1542414c70cbSLiam Girdwood } 1543414c70cbSLiam Girdwood 1544414c70cbSLiam Girdwood /** 1545414c70cbSLiam Girdwood * regulator_bulk_get - get multiple regulator consumers 1546414c70cbSLiam Girdwood * 1547414c70cbSLiam Girdwood * @dev: Device to supply 1548414c70cbSLiam Girdwood * @num_consumers: Number of consumers to register 1549414c70cbSLiam Girdwood * @consumers: Configuration of consumers; clients are stored here. 1550414c70cbSLiam Girdwood * 1551414c70cbSLiam Girdwood * @return 0 on success, an errno on failure. 1552414c70cbSLiam Girdwood * 1553414c70cbSLiam Girdwood * This helper function allows drivers to get several regulator 1554414c70cbSLiam Girdwood * consumers in one operation. If any of the regulators cannot be 1555414c70cbSLiam Girdwood * acquired then any regulators that were allocated will be freed 1556414c70cbSLiam Girdwood * before returning to the caller. 1557414c70cbSLiam Girdwood */ 1558414c70cbSLiam Girdwood int regulator_bulk_get(struct device *dev, int num_consumers, 1559414c70cbSLiam Girdwood struct regulator_bulk_data *consumers) 1560414c70cbSLiam Girdwood { 1561414c70cbSLiam Girdwood int i; 1562414c70cbSLiam Girdwood int ret; 1563414c70cbSLiam Girdwood 1564414c70cbSLiam Girdwood for (i = 0; i < num_consumers; i++) 1565414c70cbSLiam Girdwood consumers[i].consumer = NULL; 1566414c70cbSLiam Girdwood 1567414c70cbSLiam Girdwood for (i = 0; i < num_consumers; i++) { 1568414c70cbSLiam Girdwood consumers[i].consumer = regulator_get(dev, 1569414c70cbSLiam Girdwood consumers[i].supply); 1570414c70cbSLiam Girdwood if (IS_ERR(consumers[i].consumer)) { 1571414c70cbSLiam Girdwood dev_err(dev, "Failed to get supply '%s'\n", 1572414c70cbSLiam Girdwood consumers[i].supply); 1573414c70cbSLiam Girdwood ret = PTR_ERR(consumers[i].consumer); 1574414c70cbSLiam Girdwood consumers[i].consumer = NULL; 1575414c70cbSLiam Girdwood goto err; 1576414c70cbSLiam Girdwood } 1577414c70cbSLiam Girdwood } 1578414c70cbSLiam Girdwood 1579414c70cbSLiam Girdwood return 0; 1580414c70cbSLiam Girdwood 1581414c70cbSLiam Girdwood err: 1582414c70cbSLiam Girdwood for (i = 0; i < num_consumers && consumers[i].consumer; i++) 1583414c70cbSLiam Girdwood regulator_put(consumers[i].consumer); 1584414c70cbSLiam Girdwood 1585414c70cbSLiam Girdwood return ret; 1586414c70cbSLiam Girdwood } 1587414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_bulk_get); 1588414c70cbSLiam Girdwood 1589414c70cbSLiam Girdwood /** 1590414c70cbSLiam Girdwood * regulator_bulk_enable - enable multiple regulator consumers 1591414c70cbSLiam Girdwood * 1592414c70cbSLiam Girdwood * @num_consumers: Number of consumers 1593414c70cbSLiam Girdwood * @consumers: Consumer data; clients are stored here. 1594414c70cbSLiam Girdwood * @return 0 on success, an errno on failure 1595414c70cbSLiam Girdwood * 1596414c70cbSLiam Girdwood * This convenience API allows consumers to enable multiple regulator 1597414c70cbSLiam Girdwood * clients in a single API call. If any consumers cannot be enabled 1598414c70cbSLiam Girdwood * then any others that were enabled will be disabled again prior to 1599414c70cbSLiam Girdwood * return. 1600414c70cbSLiam Girdwood */ 1601414c70cbSLiam Girdwood int regulator_bulk_enable(int num_consumers, 1602414c70cbSLiam Girdwood struct regulator_bulk_data *consumers) 1603414c70cbSLiam Girdwood { 1604414c70cbSLiam Girdwood int i; 1605414c70cbSLiam Girdwood int ret; 1606414c70cbSLiam Girdwood 1607414c70cbSLiam Girdwood for (i = 0; i < num_consumers; i++) { 1608414c70cbSLiam Girdwood ret = regulator_enable(consumers[i].consumer); 1609414c70cbSLiam Girdwood if (ret != 0) 1610414c70cbSLiam Girdwood goto err; 1611414c70cbSLiam Girdwood } 1612414c70cbSLiam Girdwood 1613414c70cbSLiam Girdwood return 0; 1614414c70cbSLiam Girdwood 1615414c70cbSLiam Girdwood err: 1616414c70cbSLiam Girdwood printk(KERN_ERR "Failed to enable %s\n", consumers[i].supply); 1617414c70cbSLiam Girdwood for (i = 0; i < num_consumers; i++) 1618414c70cbSLiam Girdwood regulator_disable(consumers[i].consumer); 1619414c70cbSLiam Girdwood 1620414c70cbSLiam Girdwood return ret; 1621414c70cbSLiam Girdwood } 1622414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_bulk_enable); 1623414c70cbSLiam Girdwood 1624414c70cbSLiam Girdwood /** 1625414c70cbSLiam Girdwood * regulator_bulk_disable - disable multiple regulator consumers 1626414c70cbSLiam Girdwood * 1627414c70cbSLiam Girdwood * @num_consumers: Number of consumers 1628414c70cbSLiam Girdwood * @consumers: Consumer data; clients are stored here. 1629414c70cbSLiam Girdwood * @return 0 on success, an errno on failure 1630414c70cbSLiam Girdwood * 1631414c70cbSLiam Girdwood * This convenience API allows consumers to disable multiple regulator 1632414c70cbSLiam Girdwood * clients in a single API call. If any consumers cannot be enabled 1633414c70cbSLiam Girdwood * then any others that were disabled will be disabled again prior to 1634414c70cbSLiam Girdwood * return. 1635414c70cbSLiam Girdwood */ 1636414c70cbSLiam Girdwood int regulator_bulk_disable(int num_consumers, 1637414c70cbSLiam Girdwood struct regulator_bulk_data *consumers) 1638414c70cbSLiam Girdwood { 1639414c70cbSLiam Girdwood int i; 1640414c70cbSLiam Girdwood int ret; 1641414c70cbSLiam Girdwood 1642414c70cbSLiam Girdwood for (i = 0; i < num_consumers; i++) { 1643414c70cbSLiam Girdwood ret = regulator_disable(consumers[i].consumer); 1644414c70cbSLiam Girdwood if (ret != 0) 1645414c70cbSLiam Girdwood goto err; 1646414c70cbSLiam Girdwood } 1647414c70cbSLiam Girdwood 1648414c70cbSLiam Girdwood return 0; 1649414c70cbSLiam Girdwood 1650414c70cbSLiam Girdwood err: 1651414c70cbSLiam Girdwood printk(KERN_ERR "Failed to disable %s\n", consumers[i].supply); 1652414c70cbSLiam Girdwood for (i = 0; i < num_consumers; i++) 1653414c70cbSLiam Girdwood regulator_enable(consumers[i].consumer); 1654414c70cbSLiam Girdwood 1655414c70cbSLiam Girdwood return ret; 1656414c70cbSLiam Girdwood } 1657414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_bulk_disable); 1658414c70cbSLiam Girdwood 1659414c70cbSLiam Girdwood /** 1660414c70cbSLiam Girdwood * regulator_bulk_free - free multiple regulator consumers 1661414c70cbSLiam Girdwood * 1662414c70cbSLiam Girdwood * @num_consumers: Number of consumers 1663414c70cbSLiam Girdwood * @consumers: Consumer data; clients are stored here. 1664414c70cbSLiam Girdwood * 1665414c70cbSLiam Girdwood * This convenience API allows consumers to free multiple regulator 1666414c70cbSLiam Girdwood * clients in a single API call. 1667414c70cbSLiam Girdwood */ 1668414c70cbSLiam Girdwood void regulator_bulk_free(int num_consumers, 1669414c70cbSLiam Girdwood struct regulator_bulk_data *consumers) 1670414c70cbSLiam Girdwood { 1671414c70cbSLiam Girdwood int i; 1672414c70cbSLiam Girdwood 1673414c70cbSLiam Girdwood for (i = 0; i < num_consumers; i++) { 1674414c70cbSLiam Girdwood regulator_put(consumers[i].consumer); 1675414c70cbSLiam Girdwood consumers[i].consumer = NULL; 1676414c70cbSLiam Girdwood } 1677414c70cbSLiam Girdwood } 1678414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_bulk_free); 1679414c70cbSLiam Girdwood 1680414c70cbSLiam Girdwood /** 1681414c70cbSLiam Girdwood * regulator_notifier_call_chain - call regulator event notifier 1682414c70cbSLiam Girdwood * @regulator: regulator source 1683414c70cbSLiam Girdwood * @event: notifier block 1684414c70cbSLiam Girdwood * @data: 1685414c70cbSLiam Girdwood * 1686414c70cbSLiam Girdwood * Called by regulator drivers to notify clients a regulator event has 1687414c70cbSLiam Girdwood * occurred. We also notify regulator clients downstream. 1688414c70cbSLiam Girdwood */ 1689414c70cbSLiam Girdwood int regulator_notifier_call_chain(struct regulator_dev *rdev, 1690414c70cbSLiam Girdwood unsigned long event, void *data) 1691414c70cbSLiam Girdwood { 1692414c70cbSLiam Girdwood _notifier_call_chain(rdev, event, data); 1693414c70cbSLiam Girdwood return NOTIFY_DONE; 1694414c70cbSLiam Girdwood 1695414c70cbSLiam Girdwood } 1696414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_notifier_call_chain); 1697414c70cbSLiam Girdwood 1698414c70cbSLiam Girdwood /** 1699414c70cbSLiam Girdwood * regulator_register - register regulator 1700414c70cbSLiam Girdwood * @regulator: regulator source 1701414c70cbSLiam Girdwood * @reg_data: private regulator data 1702414c70cbSLiam Girdwood * 1703414c70cbSLiam Girdwood * Called by regulator drivers to register a regulator. 1704414c70cbSLiam Girdwood * Returns 0 on success. 1705414c70cbSLiam Girdwood */ 1706414c70cbSLiam Girdwood struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, 1707a5766f11SLiam Girdwood struct device *dev, void *driver_data) 1708414c70cbSLiam Girdwood { 1709414c70cbSLiam Girdwood static atomic_t regulator_no = ATOMIC_INIT(0); 1710414c70cbSLiam Girdwood struct regulator_dev *rdev; 1711a5766f11SLiam Girdwood struct regulator_init_data *init_data = dev->platform_data; 1712a5766f11SLiam Girdwood int ret, i; 1713414c70cbSLiam Girdwood 1714414c70cbSLiam Girdwood if (regulator_desc == NULL) 1715414c70cbSLiam Girdwood return ERR_PTR(-EINVAL); 1716414c70cbSLiam Girdwood 1717414c70cbSLiam Girdwood if (regulator_desc->name == NULL || regulator_desc->ops == NULL) 1718414c70cbSLiam Girdwood return ERR_PTR(-EINVAL); 1719414c70cbSLiam Girdwood 1720414c70cbSLiam Girdwood if (!regulator_desc->type == REGULATOR_VOLTAGE && 1721414c70cbSLiam Girdwood !regulator_desc->type == REGULATOR_CURRENT) 1722414c70cbSLiam Girdwood return ERR_PTR(-EINVAL); 1723414c70cbSLiam Girdwood 172446fabe1eSMark Brown if (!init_data) 172546fabe1eSMark Brown return ERR_PTR(-EINVAL); 172646fabe1eSMark Brown 1727414c70cbSLiam Girdwood rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); 1728414c70cbSLiam Girdwood if (rdev == NULL) 1729414c70cbSLiam Girdwood return ERR_PTR(-ENOMEM); 1730414c70cbSLiam Girdwood 1731414c70cbSLiam Girdwood mutex_lock(®ulator_list_mutex); 1732414c70cbSLiam Girdwood 1733414c70cbSLiam Girdwood mutex_init(&rdev->mutex); 1734a5766f11SLiam Girdwood rdev->reg_data = driver_data; 1735414c70cbSLiam Girdwood rdev->owner = regulator_desc->owner; 1736414c70cbSLiam Girdwood rdev->desc = regulator_desc; 1737414c70cbSLiam Girdwood INIT_LIST_HEAD(&rdev->consumer_list); 1738414c70cbSLiam Girdwood INIT_LIST_HEAD(&rdev->supply_list); 1739414c70cbSLiam Girdwood INIT_LIST_HEAD(&rdev->list); 1740414c70cbSLiam Girdwood INIT_LIST_HEAD(&rdev->slist); 1741414c70cbSLiam Girdwood BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier); 1742414c70cbSLiam Girdwood 1743a5766f11SLiam Girdwood /* preform any regulator specific init */ 1744a5766f11SLiam Girdwood if (init_data->regulator_init) { 1745a5766f11SLiam Girdwood ret = init_data->regulator_init(rdev->reg_data); 1746a5766f11SLiam Girdwood if (ret < 0) { 1747414c70cbSLiam Girdwood kfree(rdev); 1748414c70cbSLiam Girdwood rdev = ERR_PTR(ret); 1749a5766f11SLiam Girdwood goto out; 1750414c70cbSLiam Girdwood } 1751a5766f11SLiam Girdwood } 1752a5766f11SLiam Girdwood 1753a5766f11SLiam Girdwood /* set regulator constraints */ 1754a5766f11SLiam Girdwood ret = set_machine_constraints(rdev, &init_data->constraints); 1755a5766f11SLiam Girdwood if (ret < 0) { 1756a5766f11SLiam Girdwood kfree(rdev); 1757a5766f11SLiam Girdwood rdev = ERR_PTR(ret); 1758a5766f11SLiam Girdwood goto out; 1759a5766f11SLiam Girdwood } 1760a5766f11SLiam Girdwood 1761a5766f11SLiam Girdwood /* register with sysfs */ 1762a5766f11SLiam Girdwood rdev->dev.class = ®ulator_class; 1763a5766f11SLiam Girdwood rdev->dev.parent = dev; 1764a5766f11SLiam Girdwood snprintf(rdev->dev.bus_id, sizeof(rdev->dev.bus_id), 1765a5766f11SLiam Girdwood "regulator.%d", atomic_inc_return(®ulator_no) - 1); 1766a5766f11SLiam Girdwood ret = device_register(&rdev->dev); 1767a5766f11SLiam Girdwood if (ret != 0) { 1768a5766f11SLiam Girdwood kfree(rdev); 1769a5766f11SLiam Girdwood rdev = ERR_PTR(ret); 1770a5766f11SLiam Girdwood goto out; 1771a5766f11SLiam Girdwood } 1772a5766f11SLiam Girdwood 1773a5766f11SLiam Girdwood dev_set_drvdata(&rdev->dev, rdev); 1774a5766f11SLiam Girdwood 1775a5766f11SLiam Girdwood /* set supply regulator if it exists */ 1776a5766f11SLiam Girdwood if (init_data->supply_regulator_dev) { 1777a5766f11SLiam Girdwood ret = set_supply(rdev, 1778a5766f11SLiam Girdwood dev_get_drvdata(init_data->supply_regulator_dev)); 1779a5766f11SLiam Girdwood if (ret < 0) { 1780a5766f11SLiam Girdwood device_unregister(&rdev->dev); 1781a5766f11SLiam Girdwood kfree(rdev); 1782a5766f11SLiam Girdwood rdev = ERR_PTR(ret); 1783a5766f11SLiam Girdwood goto out; 1784a5766f11SLiam Girdwood } 1785a5766f11SLiam Girdwood } 1786a5766f11SLiam Girdwood 1787a5766f11SLiam Girdwood /* add consumers devices */ 1788a5766f11SLiam Girdwood for (i = 0; i < init_data->num_consumer_supplies; i++) { 1789a5766f11SLiam Girdwood ret = set_consumer_device_supply(rdev, 1790a5766f11SLiam Girdwood init_data->consumer_supplies[i].dev, 1791a5766f11SLiam Girdwood init_data->consumer_supplies[i].supply); 1792a5766f11SLiam Girdwood if (ret < 0) { 1793a5766f11SLiam Girdwood for (--i; i >= 0; i--) 1794a5766f11SLiam Girdwood unset_consumer_device_supply(rdev, 1795a5766f11SLiam Girdwood init_data->consumer_supplies[i].dev); 1796a5766f11SLiam Girdwood device_unregister(&rdev->dev); 1797a5766f11SLiam Girdwood kfree(rdev); 1798a5766f11SLiam Girdwood rdev = ERR_PTR(ret); 1799a5766f11SLiam Girdwood goto out; 1800a5766f11SLiam Girdwood } 1801a5766f11SLiam Girdwood } 1802a5766f11SLiam Girdwood 1803a5766f11SLiam Girdwood list_add(&rdev->list, ®ulator_list); 1804a5766f11SLiam Girdwood out: 1805414c70cbSLiam Girdwood mutex_unlock(®ulator_list_mutex); 1806414c70cbSLiam Girdwood return rdev; 1807414c70cbSLiam Girdwood } 1808414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_register); 1809414c70cbSLiam Girdwood 1810414c70cbSLiam Girdwood /** 1811414c70cbSLiam Girdwood * regulator_unregister - unregister regulator 1812414c70cbSLiam Girdwood * @regulator: regulator source 1813414c70cbSLiam Girdwood * 1814414c70cbSLiam Girdwood * Called by regulator drivers to unregister a regulator. 1815414c70cbSLiam Girdwood */ 1816414c70cbSLiam Girdwood void regulator_unregister(struct regulator_dev *rdev) 1817414c70cbSLiam Girdwood { 1818414c70cbSLiam Girdwood if (rdev == NULL) 1819414c70cbSLiam Girdwood return; 1820414c70cbSLiam Girdwood 1821414c70cbSLiam Girdwood mutex_lock(®ulator_list_mutex); 1822414c70cbSLiam Girdwood list_del(&rdev->list); 1823414c70cbSLiam Girdwood if (rdev->supply) 1824414c70cbSLiam Girdwood sysfs_remove_link(&rdev->dev.kobj, "supply"); 1825414c70cbSLiam Girdwood device_unregister(&rdev->dev); 1826414c70cbSLiam Girdwood mutex_unlock(®ulator_list_mutex); 1827414c70cbSLiam Girdwood } 1828414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_unregister); 1829414c70cbSLiam Girdwood 1830414c70cbSLiam Girdwood /** 1831414c70cbSLiam Girdwood * regulator_suspend_prepare: prepare regulators for system wide suspend 1832414c70cbSLiam Girdwood * @state: system suspend state 1833414c70cbSLiam Girdwood * 1834414c70cbSLiam Girdwood * Configure each regulator with it's suspend operating parameters for state. 1835414c70cbSLiam Girdwood * This will usually be called by machine suspend code prior to supending. 1836414c70cbSLiam Girdwood */ 1837414c70cbSLiam Girdwood int regulator_suspend_prepare(suspend_state_t state) 1838414c70cbSLiam Girdwood { 1839414c70cbSLiam Girdwood struct regulator_dev *rdev; 1840414c70cbSLiam Girdwood int ret = 0; 1841414c70cbSLiam Girdwood 1842414c70cbSLiam Girdwood /* ON is handled by regulator active state */ 1843414c70cbSLiam Girdwood if (state == PM_SUSPEND_ON) 1844414c70cbSLiam Girdwood return -EINVAL; 1845414c70cbSLiam Girdwood 1846414c70cbSLiam Girdwood mutex_lock(®ulator_list_mutex); 1847414c70cbSLiam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 1848414c70cbSLiam Girdwood 1849414c70cbSLiam Girdwood mutex_lock(&rdev->mutex); 1850414c70cbSLiam Girdwood ret = suspend_prepare(rdev, state); 1851414c70cbSLiam Girdwood mutex_unlock(&rdev->mutex); 1852414c70cbSLiam Girdwood 1853414c70cbSLiam Girdwood if (ret < 0) { 1854414c70cbSLiam Girdwood printk(KERN_ERR "%s: failed to prepare %s\n", 1855414c70cbSLiam Girdwood __func__, rdev->desc->name); 1856414c70cbSLiam Girdwood goto out; 1857414c70cbSLiam Girdwood } 1858414c70cbSLiam Girdwood } 1859414c70cbSLiam Girdwood out: 1860414c70cbSLiam Girdwood mutex_unlock(®ulator_list_mutex); 1861414c70cbSLiam Girdwood return ret; 1862414c70cbSLiam Girdwood } 1863414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_suspend_prepare); 1864414c70cbSLiam Girdwood 1865414c70cbSLiam Girdwood /** 1866414c70cbSLiam Girdwood * rdev_get_drvdata - get rdev regulator driver data 1867414c70cbSLiam Girdwood * @regulator: regulator 1868414c70cbSLiam Girdwood * 1869414c70cbSLiam Girdwood * Get rdev regulator driver private data. This call can be used in the 1870414c70cbSLiam Girdwood * regulator driver context. 1871414c70cbSLiam Girdwood */ 1872414c70cbSLiam Girdwood void *rdev_get_drvdata(struct regulator_dev *rdev) 1873414c70cbSLiam Girdwood { 1874414c70cbSLiam Girdwood return rdev->reg_data; 1875414c70cbSLiam Girdwood } 1876414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(rdev_get_drvdata); 1877414c70cbSLiam Girdwood 1878414c70cbSLiam Girdwood /** 1879414c70cbSLiam Girdwood * regulator_get_drvdata - get regulator driver data 1880414c70cbSLiam Girdwood * @regulator: regulator 1881414c70cbSLiam Girdwood * 1882414c70cbSLiam Girdwood * Get regulator driver private data. This call can be used in the consumer 1883414c70cbSLiam Girdwood * driver context when non API regulator specific functions need to be called. 1884414c70cbSLiam Girdwood */ 1885414c70cbSLiam Girdwood void *regulator_get_drvdata(struct regulator *regulator) 1886414c70cbSLiam Girdwood { 1887414c70cbSLiam Girdwood return regulator->rdev->reg_data; 1888414c70cbSLiam Girdwood } 1889414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_get_drvdata); 1890414c70cbSLiam Girdwood 1891414c70cbSLiam Girdwood /** 1892414c70cbSLiam Girdwood * regulator_set_drvdata - set regulator driver data 1893414c70cbSLiam Girdwood * @regulator: regulator 1894414c70cbSLiam Girdwood * @data: data 1895414c70cbSLiam Girdwood */ 1896414c70cbSLiam Girdwood void regulator_set_drvdata(struct regulator *regulator, void *data) 1897414c70cbSLiam Girdwood { 1898414c70cbSLiam Girdwood regulator->rdev->reg_data = data; 1899414c70cbSLiam Girdwood } 1900414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(regulator_set_drvdata); 1901414c70cbSLiam Girdwood 1902414c70cbSLiam Girdwood /** 1903414c70cbSLiam Girdwood * regulator_get_id - get regulator ID 1904414c70cbSLiam Girdwood * @regulator: regulator 1905414c70cbSLiam Girdwood */ 1906414c70cbSLiam Girdwood int rdev_get_id(struct regulator_dev *rdev) 1907414c70cbSLiam Girdwood { 1908414c70cbSLiam Girdwood return rdev->desc->id; 1909414c70cbSLiam Girdwood } 1910414c70cbSLiam Girdwood EXPORT_SYMBOL_GPL(rdev_get_id); 1911414c70cbSLiam Girdwood 1912a5766f11SLiam Girdwood struct device *rdev_get_dev(struct regulator_dev *rdev) 1913a5766f11SLiam Girdwood { 1914a5766f11SLiam Girdwood return &rdev->dev; 1915a5766f11SLiam Girdwood } 1916a5766f11SLiam Girdwood EXPORT_SYMBOL_GPL(rdev_get_dev); 1917a5766f11SLiam Girdwood 1918a5766f11SLiam Girdwood void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) 1919a5766f11SLiam Girdwood { 1920a5766f11SLiam Girdwood return reg_init_data->driver_data; 1921a5766f11SLiam Girdwood } 1922a5766f11SLiam Girdwood EXPORT_SYMBOL_GPL(regulator_get_init_drvdata); 1923a5766f11SLiam Girdwood 1924414c70cbSLiam Girdwood static int __init regulator_init(void) 1925414c70cbSLiam Girdwood { 1926414c70cbSLiam Girdwood printk(KERN_INFO "regulator: core version %s\n", REGULATOR_VERSION); 1927414c70cbSLiam Girdwood return class_register(®ulator_class); 1928414c70cbSLiam Girdwood } 1929414c70cbSLiam Girdwood 1930414c70cbSLiam Girdwood /* init early to allow our consumers to complete system booting */ 1931414c70cbSLiam Girdwood core_initcall(regulator_init); 1932