core.c revision 05fda3b1abc23d832144e9497fb218870927d645
1414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* 2414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * core.c -- Voltage/Current Regulator framework. 3414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 4414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Copyright 2007, 2008 Wolfson Microelectronics PLC. 5a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Copyright 2008 SlimLogic Ltd. 6414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 7a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Author: Liam Girdwood <lrg@slimlogic.co.uk> 8414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 9414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This program is free software; you can redistribute it and/or modify it 10414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * under the terms of the GNU General Public License as published by the 11414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Free Software Foundation; either version 2 of the License, or (at your 12414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * option) any later version. 13414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 14414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 15414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 161d7372e15ebd7f56a336fabe6ee31f8e692cd9cbDaniel Walker#define pr_fmt(fmt) "%s: " fmt, __func__ 17c5e28ed78274468b92522e7f1e9a5e6080559100Daniel Walker 18414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/kernel.h> 19414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/init.h> 20414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/device.h> 215a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 22414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/err.h> 23414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/mutex.h> 24414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/suspend.h> 2531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown#include <linux/delay.h> 26414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/regulator/consumer.h> 27414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/regulator/driver.h> 28414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#include <linux/regulator/machine.h> 29414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 3002fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown#define CREATE_TRACE_POINTS 3102fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown#include <trace/events/regulator.h> 3202fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 3334abbd68efe09765465b81dfedeee9994f13302fMark Brown#include "dummy.h" 3434abbd68efe09765465b81dfedeee9994f13302fMark Brown 355da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches#define rdev_err(rdev, fmt, ...) \ 365da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches pr_err("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__) 375da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches#define rdev_warn(rdev, fmt, ...) \ 385da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches pr_warn("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__) 395da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches#define rdev_info(rdev, fmt, ...) \ 405da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches pr_info("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__) 415da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches#define rdev_dbg(rdev, fmt, ...) \ 425da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches pr_debug("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__) 435da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches 44414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic DEFINE_MUTEX(regulator_list_mutex); 45414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic LIST_HEAD(regulator_list); 46414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic LIST_HEAD(regulator_map_list); 47ca7255614e0861e36480103f4a402a115803d7b5Mark Brownstatic int has_full_constraints; 48688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brownstatic bool board_wants_dummy_regulator; 49414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 508dc5390d4f3fd8acc73773a56fea13544e7924dcMark Brown/* 51414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator_map 52414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 53414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Used to provide symbolic supply names to devices. 54414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 55414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_map { 56414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; 5740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *dev_name; /* The dev_name() for the consumer */ 58414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply; 59a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *regulator; 60414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 61414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 62414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* 63414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * struct regulator 64414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 65414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * One for each consumer device. 66414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 67414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator { 68414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev; 69414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct list_head list; 70414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA_load; 71414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uV; 72414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int max_uV; 73414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char *supply_name; 74414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute dev_attr; 75414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 76414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 77414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 78414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev); 798cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlylestatic int _regulator_disable(struct regulator_dev *rdev, 808cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev **supply_rdev_ptr); 81414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev); 82414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev); 83414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev); 84414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 85414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data); 86414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 871083c39346d482b9001944d05c09191027892226Mark Brownstatic const char *rdev_get_name(struct regulator_dev *rdev) 881083c39346d482b9001944d05c09191027892226Mark Brown{ 891083c39346d482b9001944d05c09191027892226Mark Brown if (rdev->constraints && rdev->constraints->name) 901083c39346d482b9001944d05c09191027892226Mark Brown return rdev->constraints->name; 911083c39346d482b9001944d05c09191027892226Mark Brown else if (rdev->desc->name) 921083c39346d482b9001944d05c09191027892226Mark Brown return rdev->desc->name; 931083c39346d482b9001944d05c09191027892226Mark Brown else 941083c39346d482b9001944d05c09191027892226Mark Brown return ""; 951083c39346d482b9001944d05c09191027892226Mark Brown} 961083c39346d482b9001944d05c09191027892226Mark Brown 97414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* gets the regulator for a given consumer device */ 98414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *get_device_regulator(struct device *dev) 99414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = NULL; 101414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 103414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 106414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) { 107414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev == dev) { 108414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 110414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 111414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 112414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 113414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 114414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 115414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 116414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 117414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 118414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 119414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Platform voltage constraint check */ 120414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_voltage(struct regulator_dev *rdev, 121414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int *min_uV, int *max_uV) 122414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 123414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BUG_ON(*min_uV > *max_uV); 124414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 1265da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "no constraints\n"); 127414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 128414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 129414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_VOLTAGE)) { 1305da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "operation not allowed\n"); 131414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 132414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 133414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 134414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*max_uV > rdev->constraints->max_uV) 135414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *max_uV = rdev->constraints->max_uV; 136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uV < rdev->constraints->min_uV) 137414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *min_uV = rdev->constraints->min_uV; 138414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 139414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uV > *max_uV) 140414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 141414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 142414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 143414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 144414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 14505fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni/* Make sure we select a voltage that suits the needs of all 14605fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni * regulator consumers 14705fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni */ 14805fda3b1abc23d832144e9497fb218870927d645Thomas Petazzonistatic int regulator_check_consumers(struct regulator_dev *rdev, 14905fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni int *min_uV, int *max_uV) 15005fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni{ 15105fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni struct regulator *regulator; 15205fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni 15305fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni list_for_each_entry(regulator, &rdev->consumer_list, list) { 15405fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni if (*max_uV > regulator->max_uV) 15505fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni *max_uV = regulator->max_uV; 15605fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni if (*min_uV < regulator->min_uV) 15705fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni *min_uV = regulator->min_uV; 15805fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni } 15905fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni 16005fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni if (*min_uV > *max_uV) 16105fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni return -EINVAL; 16205fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni 16305fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni return 0; 16405fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni} 16505fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni 166414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* current constraint check */ 167414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_current_limit(struct regulator_dev *rdev, 168414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int *min_uA, int *max_uA) 169414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 170414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BUG_ON(*min_uA > *max_uA); 171414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 172414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 1735da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "no constraints\n"); 174414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 175414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 176414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_CURRENT)) { 1775da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "operation not allowed\n"); 178414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 179414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 180414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 181414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*max_uA > rdev->constraints->max_uA) 182414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *max_uA = rdev->constraints->max_uA; 183414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uA < rdev->constraints->min_uA) 184414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood *min_uA = rdev->constraints->min_uA; 185414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 186414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (*min_uA > *max_uA) 187414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 188414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 189414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 190414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 191414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 192414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* operating mode constraint check */ 193414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_mode(struct regulator_dev *rdev, int mode) 194414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 195e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell switch (mode) { 196e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_FAST: 197e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_NORMAL: 198e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_IDLE: 199e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell case REGULATOR_MODE_STANDBY: 200e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell break; 201e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell default: 202e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell return -EINVAL; 203e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell } 204e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell 205414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 2065da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "no constraints\n"); 207414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 208414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 209414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_MODE)) { 2105da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "operation not allowed\n"); 211414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 212414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 213414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_modes_mask & mode)) { 2145da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "invalid mode %x\n", mode); 215414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 216414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 217414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 218414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 219414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 220414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* dynamic regulator mode switching constraint check */ 221414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int regulator_check_drms(struct regulator_dev *rdev) 222414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 223414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) { 2245da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "no constraints\n"); 225414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -ENODEV; 226414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 227414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!(rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) { 2285da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "operation not allowed\n"); 229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EPERM; 230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 234414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t device_requested_uA_show(struct device *dev, 235414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 236414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 237414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 238414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 239414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = get_device_regulator(dev); 240414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 242414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 243414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", regulator->uA_load); 244414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 245414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 246414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uV_show(struct device *dev, 247414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 248414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 249a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 250414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ssize_t ret; 251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 252414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 253414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = sprintf(buf, "%d\n", _regulator_get_voltage(rdev)); 254414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 255414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 256414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 257414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2587ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(microvolts, 0444, regulator_uV_show, NULL); 259414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 260414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_uA_show(struct device *dev, 261414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 262414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 263a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 264414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 265414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", _regulator_get_current_limit(rdev)); 266414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2677ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(microamps, 0444, regulator_uA_show, NULL); 268414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 269bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brownstatic ssize_t regulator_name_show(struct device *dev, 270bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown struct device_attribute *attr, char *buf) 271bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown{ 272bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown struct regulator_dev *rdev = dev_get_drvdata(dev); 273bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 2741083c39346d482b9001944d05c09191027892226Mark Brown return sprintf(buf, "%s\n", rdev_get_name(rdev)); 275bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown} 276bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 2774fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_print_opmode(char *buf, int mode) 278414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 279414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (mode) { 280414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_FAST: 281414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "fast\n"); 282414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_NORMAL: 283414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "normal\n"); 284414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_IDLE: 285414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "idle\n"); 286414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_MODE_STANDBY: 287414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "standby\n"); 288414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 289414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 290414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 291414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2924fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_opmode_show(struct device *dev, 2934fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct device_attribute *attr, char *buf) 294414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 295a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 296414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2974fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, _regulator_get_mode(rdev)); 2984fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell} 2997ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(opmode, 0444, regulator_opmode_show, NULL); 3004fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 3014fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_print_state(char *buf, int state) 3024fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell{ 303414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state > 0) 304414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "enabled\n"); 305414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else if (state == 0) 306414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "disabled\n"); 307414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 308414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 309414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 310414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 3114fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellstatic ssize_t regulator_state_show(struct device *dev, 3124fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct device_attribute *attr, char *buf) 3134fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell{ 3144fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell struct regulator_dev *rdev = dev_get_drvdata(dev); 3159332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown ssize_t ret; 3169332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown 3179332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_lock(&rdev->mutex); 3189332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown ret = regulator_print_state(buf, _regulator_is_enabled(rdev)); 3199332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_unlock(&rdev->mutex); 3204fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 3219332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown return ret; 3224fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell} 3237ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(state, 0444, regulator_state_show, NULL); 3244fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 325853116a10544206b6b2cf42ebc9d78fba2668888David Brownellstatic ssize_t regulator_status_show(struct device *dev, 326853116a10544206b6b2cf42ebc9d78fba2668888David Brownell struct device_attribute *attr, char *buf) 327853116a10544206b6b2cf42ebc9d78fba2668888David Brownell{ 328853116a10544206b6b2cf42ebc9d78fba2668888David Brownell struct regulator_dev *rdev = dev_get_drvdata(dev); 329853116a10544206b6b2cf42ebc9d78fba2668888David Brownell int status; 330853116a10544206b6b2cf42ebc9d78fba2668888David Brownell char *label; 331853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 332853116a10544206b6b2cf42ebc9d78fba2668888David Brownell status = rdev->desc->ops->get_status(rdev); 333853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (status < 0) 334853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return status; 335853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 336853116a10544206b6b2cf42ebc9d78fba2668888David Brownell switch (status) { 337853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_OFF: 338853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "off"; 339853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 340853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_ON: 341853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "on"; 342853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 343853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_ERROR: 344853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "error"; 345853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 346853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_FAST: 347853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "fast"; 348853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 349853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_NORMAL: 350853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "normal"; 351853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 352853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_IDLE: 353853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "idle"; 354853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 355853116a10544206b6b2cf42ebc9d78fba2668888David Brownell case REGULATOR_STATUS_STANDBY: 356853116a10544206b6b2cf42ebc9d78fba2668888David Brownell label = "standby"; 357853116a10544206b6b2cf42ebc9d78fba2668888David Brownell break; 358853116a10544206b6b2cf42ebc9d78fba2668888David Brownell default: 359853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return -ERANGE; 360853116a10544206b6b2cf42ebc9d78fba2668888David Brownell } 361853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 362853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return sprintf(buf, "%s\n", label); 363853116a10544206b6b2cf42ebc9d78fba2668888David Brownell} 364853116a10544206b6b2cf42ebc9d78fba2668888David Brownellstatic DEVICE_ATTR(status, 0444, regulator_status_show, NULL); 365853116a10544206b6b2cf42ebc9d78fba2668888David Brownell 366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uA_show(struct device *dev, 367414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 368414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 369a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 372414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 374414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uA); 375414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3767ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(min_microamps, 0444, regulator_min_uA_show, NULL); 377414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uA_show(struct device *dev, 379414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 380414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 381a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 382414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 383414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 384414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 385414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uA); 387414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 3887ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(max_microamps, 0444, regulator_max_uA_show, NULL); 389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 390414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_min_uV_show(struct device *dev, 391414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 392414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 393a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 394414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 397414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->min_uV); 399414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4007ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(min_microvolts, 0444, regulator_min_uV_show, NULL); 401414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 402414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_max_uV_show(struct device *dev, 403414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 404414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 405a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 406414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 407414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 408414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "constraint not defined\n"); 409414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 410414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->max_uV); 411414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4127ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(max_microvolts, 0444, regulator_max_uV_show, NULL); 413414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_total_uA_show(struct device *dev, 415414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 416414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 417a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 418414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int uA = 0; 420414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 421414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(regulator, &rdev->consumer_list, list) 423fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese uA += regulator->uA_load; 424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", uA); 426414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4277ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(requested_microamps, 0444, regulator_total_uA_show, NULL); 428414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 429414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_num_users_show(struct device *dev, 430414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 431414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 432a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 433414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->use_count); 434414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 436414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_type_show(struct device *dev, 437414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 438414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 439a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 440414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 441414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (rdev->desc->type) { 442414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_VOLTAGE: 443414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "voltage\n"); 444414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case REGULATOR_CURRENT: 445414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "current\n"); 446414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "unknown\n"); 448414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 449414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 450414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_uV_show(struct device *dev, 451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 452414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 453a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_mem.uV); 456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4577ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_microvolts, 0444, 4587ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_uV_show, NULL); 459414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_uV_show(struct device *dev, 461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 462414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 463a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_disk.uV); 466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4677ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_microvolts, 0444, 4687ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_uV_show, NULL); 469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 470414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_uV_show(struct device *dev, 471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 473a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 474414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return sprintf(buf, "%d\n", rdev->constraints->state_standby.uV); 476414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4777ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_microvolts, 0444, 4787ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_uV_show, NULL); 479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_mode_show(struct device *dev, 481414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 483a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 484414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4854fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4864fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_mem.mode); 487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4887ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_mode, 0444, 4897ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_mode_show, NULL); 490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_mode_show(struct device *dev, 492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 493414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 494a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 495414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 4964fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 4974fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_disk.mode); 498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 4997ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_mode, 0444, 5007ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_mode_show, NULL); 501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 502414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_mode_show(struct device *dev, 503414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 504414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 505a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 506414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 5074fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_opmode(buf, 5084fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_standby.mode); 509414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 5107ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_mode, 0444, 5117ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_mode_show, NULL); 512414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 513414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_mem_state_show(struct device *dev, 514414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 516a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 517414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 5184fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 5194fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_mem.enabled); 520414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 5217ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_mem_state, 0444, 5227ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_mem_state_show, NULL); 523414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 524414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_disk_state_show(struct device *dev, 525414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 526414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 527a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 528414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 5294fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 5304fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_disk.enabled); 531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 5327ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_disk_state, 0444, 5337ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_disk_state_show, NULL); 534414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 535414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic ssize_t regulator_suspend_standby_state_show(struct device *dev, 536414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device_attribute *attr, char *buf) 537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 538a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 539414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 5404fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell return regulator_print_state(buf, 5414fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev->constraints->state_standby.enabled); 542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 5437ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic DEVICE_ATTR(suspend_standby_state, 0444, 5447ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell regulator_suspend_standby_state_show, NULL); 5457ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 546bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown 5477ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell/* 5487ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * These are the only attributes are present for all regulators. 5497ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * Other attributes are a function of regulator functionality. 5507ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct device_attribute regulator_dev_attrs[] = { 552bc558a60b58f638ee0188affb627d4894a97b1c7Mark Brown __ATTR(name, 0444, regulator_name_show, NULL), 553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(num_users, 0444, regulator_num_users_show, NULL), 554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR(type, 0444, regulator_type_show, NULL), 555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood __ATTR_NULL, 556414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 557414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void regulator_dev_release(struct device *dev) 559414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 560a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *rdev = dev_get_drvdata(dev); 561414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(rdev); 562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct class regulator_class = { 565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .name = "regulator", 566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_release = regulator_dev_release, 567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood .dev_attrs = regulator_dev_attrs, 568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood}; 569414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 570414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* Calculate the new optimum regulator operating mode based on the new total 571414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumer load. All locks held by caller */ 572414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void drms_uA_update(struct regulator_dev *rdev) 573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 574414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *sibling; 575414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int current_uA = 0, output_uV, input_uV, err; 576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_drms(rdev); 579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0 || !rdev->desc->ops->get_optimum_mode || 580036de8efae4b81f8e1504fab654070cecce6dfa9Dan Carpenter !rdev->desc->ops->get_voltage || !rdev->desc->ops->set_mode) 581036de8efae4b81f8e1504fab654070cecce6dfa9Dan Carpenter return; 582414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 583414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 584414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 585414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) 586414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 587414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 588414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 589414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 590414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 591414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 592414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 593414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) 594414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 595414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 596414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load */ 597414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(sibling, &rdev->consumer_list, list) 598fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese current_uA += sibling->uA_load; 599414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 600414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now get the optimum mode for our new total regulator load */ 601414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, input_uV, 602414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV, current_uA); 603414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 604414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check the new mode is allowed */ 605414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = regulator_check_mode(rdev, mode); 606414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err == 0) 607414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc->ops->set_mode(rdev, mode); 608414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 609414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 610414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_set_state(struct regulator_dev *rdev, 611414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_state *rstate) 612414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 613414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 614638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown bool can_set_state; 615638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown 616638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown can_set_state = rdev->desc->ops->set_suspend_enable && 617638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown rdev->desc->ops->set_suspend_disable; 618638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown 619638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown /* If we have no suspend mode configration don't set anything; 620638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown * only warn if the driver actually makes the suspend mode 621638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown * configurable. 622638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown */ 623638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (!rstate->enabled && !rstate->disabled) { 624638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (can_set_state) 6255da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_warn(rdev, "No configuration\n"); 626638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown return 0; 627638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown } 628638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown 629638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (rstate->enabled && rstate->disabled) { 6305da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "invalid configuration\n"); 631638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown return -EINVAL; 632638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown } 633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 634638f85c54f4fed0f8f1fbc23745a8f334112e892Mark Brown if (!can_set_state) { 6355da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "no way to set suspend state\n"); 636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 637a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rstate->enabled) 640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_enable(rdev); 641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_disable(rdev); 643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 6445da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to enabled/disable\n"); 645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_voltage && rstate->uV > 0) { 649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_voltage(rdev, rstate->uV); 650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 6515da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to set voltage\n"); 652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->set_suspend_mode && rstate->mode > 0) { 657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_suspend_mode(rdev, rstate->mode); 658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 6595da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to set mode\n"); 660414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 661414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 662414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 663414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 664414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 665414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 666414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by caller */ 667414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int suspend_prepare(struct regulator_dev *rdev, suspend_state_t state) 668414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 669414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->constraints) 670414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 671414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 672414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood switch (state) { 673414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_STANDBY: 674414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 675414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_standby); 676414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MEM: 677414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 678414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_mem); 679414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood case PM_SUSPEND_MAX: 680414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return suspend_set_state(rdev, 681414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood &rdev->constraints->state_disk); 682414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood default: 683414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 684414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 685414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 686414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 687414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void print_constraints(struct regulator_dev *rdev) 688414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 689414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulation_constraints *constraints = rdev->constraints; 690973e9a2795b3b41d8408a0bb6f87b783c5efc88aMark Brown char buf[80] = ""; 6918f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown int count = 0; 6928f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown int ret; 693414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 6948f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (constraints->min_uV && constraints->max_uV) { 695414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uV == constraints->max_uV) 6968f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d mV ", 6978f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uV / 1000); 698414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 6998f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d <--> %d mV ", 7008f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uV / 1000, 7018f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->max_uV / 1000); 7028f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown } 7038f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 7048f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (!constraints->min_uV || 7058f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uV != constraints->max_uV) { 7068f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown ret = _regulator_get_voltage(rdev); 7078f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (ret > 0) 7088f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "at %d mV ", ret / 1000); 7098f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown } 7108f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 7118f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (constraints->min_uA && constraints->max_uA) { 712414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->min_uA == constraints->max_uA) 7138f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d mA ", 7148f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uA / 1000); 715414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 7168f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown count += sprintf(buf + count, "%d <--> %d mA ", 7178f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uA / 1000, 7188f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->max_uA / 1000); 7198f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown } 7208f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 7218f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (!constraints->min_uA || 7228f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown constraints->min_uA != constraints->max_uA) { 7238f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown ret = _regulator_get_current_limit(rdev); 7248f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown if (ret > 0) 725e4a6376b3b2999d169b602a582a8819d95ff79bcCyril Chemparathy count += sprintf(buf + count, "at %d mA ", ret / 1000); 726414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 7278f031b48cd2eab5fc3e4dffa06706372e90d63feMark Brown 728414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_FAST) 729414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "fast "); 730414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_NORMAL) 731414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "normal "); 732414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_IDLE) 733414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "idle "); 734414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (constraints->valid_modes_mask & REGULATOR_MODE_STANDBY) 735414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood count += sprintf(buf + count, "standby"); 736414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 7375da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_info(rdev, "regulator: %s\n", buf); 738414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 739414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 740e79055d62ea6ca3c36962209f4c819614972c95aMark Brownstatic int machine_constraints_voltage(struct regulator_dev *rdev, 7411083c39346d482b9001944d05c09191027892226Mark Brown struct regulation_constraints *constraints) 742a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 743e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown struct regulator_ops *ops = rdev->desc->ops; 744af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown int ret; 7453a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown unsigned selector; 746af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown 747af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown /* do we need to apply the constraint voltage */ 748af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown if (rdev->constraints->apply_uV && 749af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints->min_uV == rdev->constraints->max_uV && 750af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown ops->set_voltage) { 751af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown ret = ops->set_voltage(rdev, 7523a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown rdev->constraints->min_uV, 7533a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown rdev->constraints->max_uV, 7543a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown &selector); 755af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown if (ret < 0) { 7565da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to apply %duV constraint\n", 7575da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev->constraints->min_uV); 758af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown rdev->constraints = NULL; 759af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown return ret; 760af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown } 761af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown } 762e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown 7634367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* constrain machine-level voltage specs to fit 7644367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * the actual range supported by this regulator. 7654367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 7664367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ops->list_voltage && rdev->desc->n_voltages) { 7674367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int count = rdev->desc->n_voltages; 7684367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int i; 7694367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int min_uV = INT_MAX; 7704367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int max_uV = INT_MIN; 7714367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int cmin = constraints->min_uV; 7724367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int cmax = constraints->max_uV; 7734367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7743e59091828ed5406c879b899b4257fcef7271e2cMark Brown /* it's safe to autoconfigure fixed-voltage supplies 7753e59091828ed5406c879b899b4257fcef7271e2cMark Brown and the constraints are used by list_voltage. */ 7764367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (count == 1 && !cmin) { 7773e59091828ed5406c879b899b4257fcef7271e2cMark Brown cmin = 1; 7784367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell cmax = INT_MAX; 7793e59091828ed5406c879b899b4257fcef7271e2cMark Brown constraints->min_uV = cmin; 7803e59091828ed5406c879b899b4257fcef7271e2cMark Brown constraints->max_uV = cmax; 7814367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7824367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7833e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown /* voltage constraints are optional */ 7843e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown if ((cmin == 0) && (cmax == 0)) 785e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return 0; 7863e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown 7874367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* else require explicit machine-level constraints */ 7883e2b9abda554e9f6105996dca77cca9ef98de17aMark Brown if (cmin <= 0 || cmax <= 0 || cmax < cmin) { 7895da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "invalid voltage constraints\n"); 790e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return -EINVAL; 7914367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 7924367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7934367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* initial: [cmin..cmax] valid, [min_uV..max_uV] not */ 7944367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell for (i = 0; i < count; i++) { 7954367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int value; 7964367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 7974367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell value = ops->list_voltage(rdev, i); 7984367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value <= 0) 7994367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell continue; 8004367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 8014367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* maybe adjust [min_uV..max_uV] */ 8024367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value >= cmin && value < min_uV) 8034367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell min_uV = value; 8044367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (value <= cmax && value > max_uV) 8054367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell max_uV = value; 8064367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8074367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 8084367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* final: [min_uV..max_uV] valid iff constraints valid */ 8094367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (max_uV < min_uV) { 8105da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "unsupportable voltage constraints\n"); 811e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return -EINVAL; 8124367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8134367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 8144367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell /* use regulator's subset of machine constraints */ 8154367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (constraints->min_uV < min_uV) { 8165da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_dbg(rdev, "override min_uV, %d -> %d\n", 8175da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches constraints->min_uV, min_uV); 8184367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->min_uV = min_uV; 8194367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8204367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (constraints->max_uV > max_uV) { 8215da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_dbg(rdev, "override max_uV, %d -> %d\n", 8225da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches constraints->max_uV, max_uV); 8234367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell constraints->max_uV = max_uV; 8244367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8254367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 8264367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 827e79055d62ea6ca3c36962209f4c819614972c95aMark Brown return 0; 828e79055d62ea6ca3c36962209f4c819614972c95aMark Brown} 829e79055d62ea6ca3c36962209f4c819614972c95aMark Brown 830e79055d62ea6ca3c36962209f4c819614972c95aMark Brown/** 831e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * set_machine_constraints - sets regulator constraints 832e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * @rdev: regulator source 833e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * @constraints: constraints to apply 834e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * 835e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * Allows platform initialisation code to define and constrain 836e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * regulator circuits e.g. valid voltage/current ranges, etc. NOTE: 837e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * Constraints *must* be set by platform code in order for some 838e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * regulator operations to proceed i.e. set_voltage, set_current_limit, 839e79055d62ea6ca3c36962209f4c819614972c95aMark Brown * set_mode. 840e79055d62ea6ca3c36962209f4c819614972c95aMark Brown */ 841e79055d62ea6ca3c36962209f4c819614972c95aMark Brownstatic int set_machine_constraints(struct regulator_dev *rdev, 842f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown const struct regulation_constraints *constraints) 843e79055d62ea6ca3c36962209f4c819614972c95aMark Brown{ 844e79055d62ea6ca3c36962209f4c819614972c95aMark Brown int ret = 0; 845e79055d62ea6ca3c36962209f4c819614972c95aMark Brown struct regulator_ops *ops = rdev->desc->ops; 846e79055d62ea6ca3c36962209f4c819614972c95aMark Brown 847f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown rdev->constraints = kmemdup(constraints, sizeof(*constraints), 848f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown GFP_KERNEL); 849f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown if (!rdev->constraints) 850f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown return -ENOMEM; 851af5866c9cdc9e43ef775a14765fd8eab95c7fd20Mark Brown 852f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown ret = machine_constraints_voltage(rdev, rdev->constraints); 853e79055d62ea6ca3c36962209f4c819614972c95aMark Brown if (ret != 0) 854e79055d62ea6ca3c36962209f4c819614972c95aMark Brown goto out; 855e79055d62ea6ca3c36962209f4c819614972c95aMark Brown 856a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* do we need to setup our suspend state */ 857e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (constraints->initial_state) { 858f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown ret = suspend_prepare(rdev, rdev->constraints->initial_state); 859e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown if (ret < 0) { 8605da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to set suspend state\n"); 861e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown rdev->constraints = NULL; 862e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown goto out; 863e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown } 864e06f5b4fea243b152c79fe5d9552a852069de483Mark Brown } 865a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 866a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (constraints->initial_mode) { 867a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (!ops->set_mode) { 8685da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "no set_mode operation\n"); 869a308466c24b4f42bab6945026e938874d22cde50Mark Brown ret = -EINVAL; 870a308466c24b4f42bab6945026e938874d22cde50Mark Brown goto out; 871a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 872a308466c24b4f42bab6945026e938874d22cde50Mark Brown 873f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown ret = ops->set_mode(rdev, rdev->constraints->initial_mode); 874a308466c24b4f42bab6945026e938874d22cde50Mark Brown if (ret < 0) { 8755da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to set initial mode: %d\n", ret); 876a308466c24b4f42bab6945026e938874d22cde50Mark Brown goto out; 877a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 878a308466c24b4f42bab6945026e938874d22cde50Mark Brown } 879a308466c24b4f42bab6945026e938874d22cde50Mark Brown 880cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown /* If the constraints say the regulator should be on at this point 881cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown * and we have control then make sure it is enabled. 882cacf90f24e80cec9334f98e0377149f943fe9f16Mark Brown */ 883f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown if ((rdev->constraints->always_on || rdev->constraints->boot_on) && 884f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown ops->enable) { 885e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown ret = ops->enable(rdev); 886e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown if (ret < 0) { 8875da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to enable\n"); 888e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown rdev->constraints = NULL; 889e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown goto out; 890e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown } 891e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown } 892e5fda26c7ea9430d7d953364f900bafdce2be67bMark Brown 893a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood print_constraints(rdev); 894a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 895a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return ret; 896a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 897a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 898a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 899a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * set_supply - set regulator supply regulator 90069279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator name 90169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @supply_rdev: supply regulator name 902a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 903a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Called by platform initialisation code to set the supply regulator for this 904a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * regulator. This ensures that a regulators supply will also be enabled by the 905a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * core if it's child is enabled. 906a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 907a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_supply(struct regulator_dev *rdev, 908a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_dev *supply_rdev) 909a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 910a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int err; 911a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 912a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &supply_rdev->dev.kobj, 913a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood "supply"); 914a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (err) { 9155da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "could not add device link %s err %d\n", 9165da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches supply_rdev->dev.kobj.name, err); 917a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 918a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 919a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->supply = supply_rdev; 920a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->slist, &supply_rdev->supply_list); 921a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 922a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return err; 923a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 924a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 925a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood/** 92606c63f9396133f312c5a49c2285c2c8015e80934Randy Dunlap * set_consumer_device_supply - Bind a regulator to a symbolic supply 92769279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator source 92869279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @consumer_dev: device the supply applies to 92940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * @consumer_dev_name: dev_name() string for device supply applies to 93069279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @supply: symbolic name for supply 931a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * 932a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * Allows platform initialisation code to map physical regulator 933a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * sources to symbolic names for supplies for use by devices. Devices 934a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * should use these symbolic names to request regulators, avoiding the 935a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood * need to provide board-specific regulator names as platform data. 93640f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * 93740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown * Only one of consumer_dev and consumer_dev_name may be specified. 938a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood */ 939a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstatic int set_consumer_device_supply(struct regulator_dev *rdev, 94040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown struct device *consumer_dev, const char *consumer_dev_name, 94140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *supply) 942a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 943a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood struct regulator_map *node; 9449ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown int has_dev; 945a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 94640f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (consumer_dev && consumer_dev_name) 94740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown return -EINVAL; 94840f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 94940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (!consumer_dev_name && consumer_dev) 95040f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown consumer_dev_name = dev_name(consumer_dev); 95140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 952a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (supply == NULL) 953a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -EINVAL; 954a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9559ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (consumer_dev_name != NULL) 9569ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown has_dev = 1; 9579ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown else 9589ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown has_dev = 0; 9599ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown 9606001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell list_for_each_entry(node, ®ulator_map_list, list) { 96123b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula if (node->dev_name && consumer_dev_name) { 96223b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula if (strcmp(node->dev_name, consumer_dev_name) != 0) 96323b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula continue; 96423b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula } else if (node->dev_name || consumer_dev_name) { 9656001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell continue; 96623b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula } 96723b5cc2ab6783256cf06779e1d522482b819b808Jani Nikula 9686001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell if (strcmp(node->supply, supply) != 0) 9696001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell continue; 9706001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell 9716001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell dev_dbg(consumer_dev, "%s/%s is '%s' supply; fail %s/%s\n", 9725da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches dev_name(&node->regulator->dev), 9735da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches node->regulator->desc->name, 9745da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches supply, 9755da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches dev_name(&rdev->dev), rdev_get_name(rdev)); 9766001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell return -EBUSY; 9776001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell } 9786001e13c5f708eb68c744a69df3c2c281156030dDavid Brownell 9799ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown node = kzalloc(sizeof(struct regulator_map), GFP_KERNEL); 980a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (node == NULL) 981a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return -ENOMEM; 982a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 983a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->regulator = rdev; 984a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood node->supply = supply; 985a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9869ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (has_dev) { 9879ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown node->dev_name = kstrdup(consumer_dev_name, GFP_KERNEL); 9889ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown if (node->dev_name == NULL) { 9899ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown kfree(node); 9909ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown return -ENOMEM; 9919ed2099edca26d07947beb42c12bd1d6669e82bcMark Brown } 99240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown } 99340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 994a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&node->list, ®ulator_map_list); 995a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return 0; 996a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 997a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 9980f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoportstatic void unset_regulator_supplies(struct regulator_dev *rdev) 9990f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport{ 10000f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport struct regulator_map *node, *n; 10010f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport 10020f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport list_for_each_entry_safe(node, n, ®ulator_map_list, list) { 10030f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport if (rdev == node->regulator) { 10040f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport list_del(&node->list); 100540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown kfree(node->dev_name); 10060f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport kfree(node); 10070f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport } 10080f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport } 10090f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport} 10100f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport 1011414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood#define REG_STR_SIZE 32 1012414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1013414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic struct regulator *create_regulator(struct regulator_dev *rdev, 1014414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct device *dev, 1015414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood const char *supply_name) 1016414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1017414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator; 1018414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood char buf[REG_STR_SIZE]; 1019414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int err, size; 1020414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1021414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = kzalloc(sizeof(*regulator), GFP_KERNEL); 1022414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) 1023414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 1024414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1025414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1026414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev = rdev; 1027414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_add(®ulator->list, &rdev->consumer_list); 1028414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1029414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (dev) { 1030414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* create a 'requested_microamps_name' sysfs entry */ 1031414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "microamps_requested_%s", 1032414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood supply_name); 1033414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 1034414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto overflow_err; 1035414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1036414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev = dev; 10374f26a2abe1eed18dc6adddf2d0ae5553e51578c2Ameya Palande sysfs_attr_init(®ulator->dev_attr.attr); 1038414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.name = kstrdup(buf, GFP_KERNEL); 1039414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev_attr.attr.name == NULL) 1040414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 1041414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1042414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.attr.mode = 0444; 1043414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->dev_attr.show = device_requested_uA_show; 1044414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = device_create_file(dev, ®ulator->dev_attr); 1045414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err < 0) { 10465da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_warn(rdev, "could not add regulator_dev requested microamps sysfs entry\n"); 1047414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_name_err; 1048414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1049414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1050414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* also add a link to the device sysfs entry */ 1051414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood size = scnprintf(buf, REG_STR_SIZE, "%s-%s", 1052414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood dev->kobj.name, supply_name); 1053414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (size >= REG_STR_SIZE) 1054414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 1055414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1056414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->supply_name = kstrdup(buf, GFP_KERNEL); 1057414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->supply_name == NULL) 1058414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto attr_err; 1059414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1060414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood err = sysfs_create_link(&rdev->dev.kobj, &dev->kobj, 1061414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood buf); 1062414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (err) { 10635da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_warn(rdev, "could not add device link %s err %d\n", 10645da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches dev->kobj.name, err); 1065414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto link_name_err; 1066414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1067414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1068414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1069414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1070414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodlink_name_err: 1071414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 1072414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_err: 1073414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 1074414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodattr_name_err: 1075414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 1076414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodoverflow_err: 1077414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 1078414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 1079414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1080414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NULL; 1081414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1082414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 108331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brownstatic int _regulator_get_enable_time(struct regulator_dev *rdev) 108431aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown{ 108531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (!rdev->desc->ops->enable_time) 108631aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown return 0; 108731aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown return rdev->desc->ops->enable_time(rdev); 108831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown} 108931aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 10905ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/* Internal regulator request function */ 10915ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstatic struct regulator *_regulator_get(struct device *dev, const char *id, 10925ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown int exclusive) 1093414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1094414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1095414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_map *map; 1096414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *regulator = ERR_PTR(-ENODEV); 109740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown const char *devname = NULL; 10985ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown int ret; 1099414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (id == NULL) { 11015da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches pr_err("get() with no identifier\n"); 1102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1103414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 110540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (dev) 110640f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown devname = dev_name(dev); 110740f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 1108414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1110414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(map, ®ulator_map_list, list) { 111140f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown /* If the mapping has a device set up it must match */ 111240f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (map->dev_name && 111340f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown (!devname || strcmp(map->dev_name, devname))) 111440f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown continue; 111540f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown 111640f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown if (strcmp(map->supply, id) == 0) { 1117a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev = map->regulator; 1118414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto found; 1119a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 1120414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 112134abbd68efe09765465b81dfedeee9994f13302fMark Brown 1122688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown if (board_wants_dummy_regulator) { 1123688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown rdev = dummy_regulator_rdev; 1124688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown goto found; 1125688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown } 1126688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown 112734abbd68efe09765465b81dfedeee9994f13302fMark Brown#ifdef CONFIG_REGULATOR_DUMMY 112834abbd68efe09765465b81dfedeee9994f13302fMark Brown if (!devname) 112934abbd68efe09765465b81dfedeee9994f13302fMark Brown devname = "deviceless"; 113034abbd68efe09765465b81dfedeee9994f13302fMark Brown 113134abbd68efe09765465b81dfedeee9994f13302fMark Brown /* If the board didn't flag that it was fully constrained then 113234abbd68efe09765465b81dfedeee9994f13302fMark Brown * substitute in a dummy regulator so consumers can continue. 113334abbd68efe09765465b81dfedeee9994f13302fMark Brown */ 113434abbd68efe09765465b81dfedeee9994f13302fMark Brown if (!has_full_constraints) { 11355da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches pr_warn("%s supply %s not found, using dummy regulator\n", 11365da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches devname, id); 113734abbd68efe09765465b81dfedeee9994f13302fMark Brown rdev = dummy_regulator_rdev; 113834abbd68efe09765465b81dfedeee9994f13302fMark Brown goto found; 113934abbd68efe09765465b81dfedeee9994f13302fMark Brown } 114034abbd68efe09765465b81dfedeee9994f13302fMark Brown#endif 114134abbd68efe09765465b81dfedeee9994f13302fMark Brown 1142414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1143414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1144414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1145414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodfound: 11465ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (rdev->exclusive) { 11475ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown regulator = ERR_PTR(-EPERM); 11485ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown goto out; 11495ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 11505ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11515ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (exclusive && rdev->open_count) { 11525ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown regulator = ERR_PTR(-EBUSY); 11535ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown goto out; 11545ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 11555ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1156a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (!try_module_get(rdev->owner)) 1157a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood goto out; 1158a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 1159414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = create_regulator(rdev, dev, id); 1160414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL) { 1161414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator = ERR_PTR(-ENOMEM); 1162414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 1163414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1164414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 11655ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->open_count++; 11665ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (exclusive) { 11675ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->exclusive = 1; 11685ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11695ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown ret = _regulator_is_enabled(rdev); 11705ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown if (ret > 0) 11715ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->use_count = 1; 11725ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown else 11735ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->use_count = 0; 11745ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown } 11755ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1176a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 1177414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 11785ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1179414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator; 1180414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 11815ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 11825ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/** 11835ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator_get - lookup and obtain a reference to a regulator. 11845ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @dev: device for regulator "consumer" 11855ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @id: Supply name or regulator ID. 11865ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11875ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Returns a struct regulator corresponding to the regulator producer, 11885ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * or IS_ERR() condition containing errno. 11895ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 11905ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Use of supply names configured via regulator_set_device_supply() is 11915ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * strongly encouraged. It is recommended that the supply name used 11925ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * should match the name used for the supply and/or the relevant 11935ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * device pins in the datasheet. 11945ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown */ 11955ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstruct regulator *regulator_get(struct device *dev, const char *id) 11965ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown{ 11975ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown return _regulator_get(dev, id, 0); 11985ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown} 1199414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get); 1200414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1201414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 12025ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator_get_exclusive - obtain exclusive access to a regulator. 12035ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @dev: device for regulator "consumer" 12045ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * @id: Supply name or regulator ID. 12055ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 12065ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Returns a struct regulator corresponding to the regulator producer, 12075ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * or IS_ERR() condition containing errno. Other consumers will be 12085ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * unable to obtain this reference is held and the use count for the 12095ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator will be initialised to reflect the current state of the 12105ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator. 12115ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 12125ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * This is intended for use by consumers which cannot tolerate shared 12135ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * use of the regulator such as those which need to force the 12145ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * regulator off for correct operation of the hardware they are 12155ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * controlling. 12165ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * 12175ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * Use of supply names configured via regulator_set_device_supply() is 12185ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * strongly encouraged. It is recommended that the supply name used 12195ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * should match the name used for the supply and/or the relevant 12205ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown * device pins in the datasheet. 12215ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown */ 12225ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brownstruct regulator *regulator_get_exclusive(struct device *dev, const char *id) 12235ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown{ 12245ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown return _regulator_get(dev, id, 1); 12255ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown} 12265ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark BrownEXPORT_SYMBOL_GPL(regulator_get_exclusive); 12275ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 12285ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown/** 1229414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_put - "free" the regulator source 1230414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1231414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1232414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Note: drivers must ensure that all regulator_enable calls made on this 1233414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator source are balanced by regulator_disable calls prior to calling 1234414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * this function. 1235414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1236414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_put(struct regulator *regulator) 1237414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1238414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 1239414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1240414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator == NULL || IS_ERR(regulator)) 1241414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 1242414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1243414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 1244414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = regulator->rdev; 1245414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1246414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* remove any sysfs entries */ 1247414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator->dev) { 1248414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name); 1249414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->supply_name); 1250414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_remove_file(regulator->dev, ®ulator->dev_attr); 1251414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator->dev_attr.attr.name); 1252414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1253414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(®ulator->list); 1254414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood kfree(regulator); 1255414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 12565ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->open_count--; 12575ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown rdev->exclusive = 0; 12585ffbd136e6c51c8d1eec7a4a0c5d2180c81aea30Mark Brown 1259414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood module_put(rdev->owner); 1260414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 1261414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1262414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_put); 1263414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 12649a2372fa7a403ba327873d0208a619d781a8a150Mark Brownstatic int _regulator_can_change_status(struct regulator_dev *rdev) 12659a2372fa7a403ba327873d0208a619d781a8a150Mark Brown{ 12669a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (!rdev->constraints) 12679a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 0; 12689a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 12699a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_STATUS) 12709a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 1; 12719a2372fa7a403ba327873d0208a619d781a8a150Mark Brown else 12729a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 0; 12739a2372fa7a403ba327873d0208a619d781a8a150Mark Brown} 12749a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 1275414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_enable() */ 1276414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_enable(struct regulator_dev *rdev) 1277414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 127831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown int ret, delay; 1279414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1280acaf6ffefdf65188071f88664435b86651d70e7cBengt Jonsson if (rdev->use_count == 0) { 1281acaf6ffefdf65188071f88664435b86651d70e7cBengt Jonsson /* do we need to enable the supply regulator first */ 1282acaf6ffefdf65188071f88664435b86651d70e7cBengt Jonsson if (rdev->supply) { 1283acaf6ffefdf65188071f88664435b86651d70e7cBengt Jonsson mutex_lock(&rdev->supply->mutex); 1284acaf6ffefdf65188071f88664435b86651d70e7cBengt Jonsson ret = _regulator_enable(rdev->supply); 1285acaf6ffefdf65188071f88664435b86651d70e7cBengt Jonsson mutex_unlock(&rdev->supply->mutex); 1286acaf6ffefdf65188071f88664435b86651d70e7cBengt Jonsson if (ret < 0) { 12875da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to enable: %d\n", ret); 1288acaf6ffefdf65188071f88664435b86651d70e7cBengt Jonsson return ret; 1289acaf6ffefdf65188071f88664435b86651d70e7cBengt Jonsson } 1290414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1291414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1292414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1293414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* check voltage and requested load before enabling */ 12949a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (rdev->constraints && 12959a2372fa7a403ba327873d0208a619d781a8a150Mark Brown (rdev->constraints->valid_ops_mask & REGULATOR_CHANGE_DRMS)) 12969a2372fa7a403ba327873d0208a619d781a8a150Mark Brown drms_uA_update(rdev); 1297414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 12989a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (rdev->use_count == 0) { 12999a2372fa7a403ba327873d0208a619d781a8a150Mark Brown /* The regulator may on if it's not switchable or left on */ 13009a2372fa7a403ba327873d0208a619d781a8a150Mark Brown ret = _regulator_is_enabled(rdev); 13019a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (ret == -EINVAL || ret == 0) { 13029a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (!_regulator_can_change_status(rdev)) 13039a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return -EPERM; 13049a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 130531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (!rdev->desc->ops->enable) 13069a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return -EINVAL; 130731aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 130831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown /* Query before enabling in case configuration 130931aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown * dependant. */ 131031aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown ret = _regulator_get_enable_time(rdev); 131131aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (ret >= 0) { 131231aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown delay = ret; 131331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown } else { 13145da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_warn(rdev, "enable_time() failed: %d\n", 13151d7372e15ebd7f56a336fabe6ee31f8e692cd9cbDaniel Walker ret); 131631aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown delay = 0; 13179a2372fa7a403ba327873d0208a619d781a8a150Mark Brown } 131831aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 131902fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_enable(rdev_get_name(rdev)); 132002fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 132131aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown /* Allow the regulator to ramp; it would be useful 132231aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown * to extend this for bulk operations so that the 132331aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown * regulators can ramp together. */ 132431aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown ret = rdev->desc->ops->enable(rdev); 132531aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown if (ret < 0) 132631aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown return ret; 132731aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 132802fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_enable_delay(rdev_get_name(rdev)); 132902fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 1330e36c1df8e18183ba2c691fe766a52c94020cdc5eAxel Lin if (delay >= 1000) { 133131aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown mdelay(delay / 1000); 1332e36c1df8e18183ba2c691fe766a52c94020cdc5eAxel Lin udelay(delay % 1000); 1333e36c1df8e18183ba2c691fe766a52c94020cdc5eAxel Lin } else if (delay) { 133431aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown udelay(delay); 1335e36c1df8e18183ba2c691fe766a52c94020cdc5eAxel Lin } 133631aae2beeb3d601d556b6a8c39085940ad1e9f42Mark Brown 133702fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_enable_complete(rdev_get_name(rdev)); 133802fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 1339a7433cff9ed8e7982de8e0f210f0325d0f3d1949Linus Walleij } else if (ret < 0) { 13405da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "is_enabled() failed: %d\n", ret); 1341414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1343a7433cff9ed8e7982de8e0f210f0325d0f3d1949Linus Walleij /* Fallthrough on positive return values - already enabled */ 1344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1345414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 13469a2372fa7a403ba327873d0208a619d781a8a150Mark Brown rdev->use_count++; 13479a2372fa7a403ba327873d0208a619d781a8a150Mark Brown 13489a2372fa7a403ba327873d0208a619d781a8a150Mark Brown return 0; 1349414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1350414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1351414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1352414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_enable - enable regulator output 1353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1354414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1355cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * Request that the regulator be enabled with the regulator output at 1356cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * the predefined voltage or current value. Calls to regulator_enable() 1357cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * must be balanced with calls to regulator_disable(). 1358cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * 1359414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: the output value can be set by other drivers, boot loader or may be 1360cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * hardwired in the regulator. 1361414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1362414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_enable(struct regulator *regulator) 1363414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1364412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell struct regulator_dev *rdev = regulator->rdev; 1365412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int ret = 0; 1366414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1367412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_lock(&rdev->mutex); 1368cd94b5053081963614f6ad77b9b66a7968056c84David Brownell ret = _regulator_enable(rdev); 1369412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_unlock(&rdev->mutex); 1370414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1371414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1372414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_enable); 1373414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1374414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_disable() */ 13758cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlylestatic int _regulator_disable(struct regulator_dev *rdev, 13768cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev **supply_rdev_ptr) 1377414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1378414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1379b12a1e29af595d05612153bcb85258193bbf9382Mattias Wallin *supply_rdev_ptr = NULL; 1380414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1381cd94b5053081963614f6ad77b9b66a7968056c84David Brownell if (WARN(rdev->use_count <= 0, 1382cd94b5053081963614f6ad77b9b66a7968056c84David Brownell "unbalanced disables for %s\n", 13831083c39346d482b9001944d05c09191027892226Mark Brown rdev_get_name(rdev))) 1384cd94b5053081963614f6ad77b9b66a7968056c84David Brownell return -EIO; 1385cd94b5053081963614f6ad77b9b66a7968056c84David Brownell 1386414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* are we the last user and permitted to disable ? */ 138760ef66fcf40f0e7bc9579981aa16bd8218942a83Mark Brown if (rdev->use_count == 1 && 138860ef66fcf40f0e7bc9579981aa16bd8218942a83Mark Brown (rdev->constraints && !rdev->constraints->always_on)) { 1389414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1390414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* we are last user */ 13919a2372fa7a403ba327873d0208a619d781a8a150Mark Brown if (_regulator_can_change_status(rdev) && 13929a2372fa7a403ba327873d0208a619d781a8a150Mark Brown rdev->desc->ops->disable) { 139302fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_disable(rdev_get_name(rdev)); 139402fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 1395414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1396414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 13975da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to disable\n"); 1398414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1399414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 140084b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown 140102fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_disable_complete(rdev_get_name(rdev)); 140202fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 140384b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown _notifier_call_chain(rdev, REGULATOR_EVENT_DISABLE, 140484b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown NULL); 1405414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1406414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1407414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 14088cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle *supply_rdev_ptr = rdev->supply; 1409414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1410414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1411414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } else if (rdev->use_count > 1) { 1412414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1413414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->constraints && 1414414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood (rdev->constraints->valid_ops_mask & 1415414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood REGULATOR_CHANGE_DRMS)) 1416414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood drms_uA_update(rdev); 1417414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1418414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count--; 1419414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1420414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1421414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1422414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1423414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1424414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_disable - disable regulator output 1425414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1426414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1427cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * Disable the regulator output voltage or current. Calls to 1428cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_enable() must be balanced with calls to 1429cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_disable(). 143069279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * 1431414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this will only disable the regulator output if no other consumer 1432cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * devices have it enabled, the regulator device supports disabling and 1433cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * machine constraints permit this operation. 1434414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1435414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_disable(struct regulator *regulator) 1436414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1437412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell struct regulator_dev *rdev = regulator->rdev; 14388cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev *supply_rdev = NULL; 1439412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell int ret = 0; 1440414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1441412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_lock(&rdev->mutex); 14428cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle ret = _regulator_disable(rdev, &supply_rdev); 1443412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell mutex_unlock(&rdev->mutex); 14448cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 14458cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle /* decrease our supplies ref count and disable if required */ 14468cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle while (supply_rdev != NULL) { 14478cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle rdev = supply_rdev; 14488cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 14498cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle mutex_lock(&rdev->mutex); 14508cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle _regulator_disable(rdev, &supply_rdev); 14518cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle mutex_unlock(&rdev->mutex); 14528cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle } 14538cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 1454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1456414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_disable); 1457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1458414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* locks held by regulator_force_disable() */ 14598cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlylestatic int _regulator_force_disable(struct regulator_dev *rdev, 14608cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev **supply_rdev_ptr) 1461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1462414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 1463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1464414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* force disable */ 1465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->disable) { 1466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ah well, who wants to live forever... */ 1467414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->disable(rdev); 1468414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 14695da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to force disable\n"); 1470414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* notify other consumers that power has been forced off */ 147384b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown _notifier_call_chain(rdev, REGULATOR_EVENT_FORCE_DISABLE | 147484b6826306119dc3c41ef9d7ed6c408112f63301Mark Brown REGULATOR_EVENT_DISABLE, NULL); 1475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1476414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* decrease our supplies ref count and disable if required */ 14788cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle *supply_rdev_ptr = rdev->supply; 1479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->use_count = 0; 1481414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1484414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1485414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_force_disable - force disable regulator output 1486414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Forcibly disable the regulator output voltage or current. 1489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: this *will* disable the regulator output even if other consumer 1490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * devices have it enabled. This should be used for situations when device 1491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * damage will likely occur if the regulator is not disabled (e.g. over temp). 1492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1493414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_force_disable(struct regulator *regulator) 1494414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 14958cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle struct regulator_dev *supply_rdev = NULL; 1496414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1497414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = 0; 15008cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle ret = _regulator_force_disable(regulator->rdev, &supply_rdev); 1501414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 15028cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 15038cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle if (supply_rdev) 15048cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle regulator_disable(get_device_regulator(rdev_get_dev(supply_rdev))); 15058cbf811dfd027bde8504e541d0009c5722b98be5Jeffrey Carlyle 1506414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1507414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1508414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_force_disable); 1509414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1510414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_is_enabled(struct regulator_dev *rdev) 1511414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 15129a7f6a4c6edc84748c6477c9df56691a0e61b8fdMark Brown /* If we don't know then assume that the regulator is always on */ 15139332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown if (!rdev->desc->ops->is_enabled) 15149a7f6a4c6edc84748c6477c9df56691a0e61b8fdMark Brown return 1; 1515414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 15169332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown return rdev->desc->ops->is_enabled(rdev); 1517414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1518414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1519414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1520414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_is_enabled - is the regulator output enabled 1521414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1522414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1523412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * Returns positive if the regulator driver backing the source/client 1524412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * has requested that the device be enabled, zero if it hasn't, else a 1525412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * negative errno code. 1526412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * 1527412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * Note that the device backing this regulator handle can have multiple 1528412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * users, so it might be enabled even if regulator_enable() was never 1529412aec610559bdb602a0a21ce149ba8ffbb6f983David Brownell * called for this particular source. 1530414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1531414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_is_enabled(struct regulator *regulator) 1532414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 15339332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown int ret; 15349332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown 15359332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_lock(®ulator->rdev->mutex); 15369332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown ret = _regulator_is_enabled(regulator->rdev); 15379332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown mutex_unlock(®ulator->rdev->mutex); 15389332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown 15399332546fe88fa88bf6a7d9b1dce53ff5d314934eMark Brown return ret; 1540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1541414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_is_enabled); 1542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 15444367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * regulator_count_voltages - count regulator_list_voltage() selectors 15454367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @regulator: regulator source 15464367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * 15474367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Returns number of selectors, or negative errno. Selectors are 15484367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * numbered starting at zero, and typically correspond to bitfields 15494367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * in hardware registers. 15504367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 15514367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownellint regulator_count_voltages(struct regulator *regulator) 15524367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell{ 15534367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_dev *rdev = regulator->rdev; 15544367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15554367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return rdev->desc->n_voltages ? : -EINVAL; 15564367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell} 15574367cfdc7c657ad8a797f51b9ffd3c64b31910e7David BrownellEXPORT_SYMBOL_GPL(regulator_count_voltages); 15584367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15594367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell/** 15604367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * regulator_list_voltage - enumerate supported voltages 15614367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @regulator: regulator source 15624367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * @selector: identify voltage to list 15634367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Context: can sleep 15644367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * 15654367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * Returns a voltage that can be passed to @regulator_set_voltage(), 156688393161210493e317ae391696ee8ef463cb3c23Thomas Weber * zero if this selector code can't be used on this system, or a 15674367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell * negative errno. 15684367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell */ 15694367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownellint regulator_list_voltage(struct regulator *regulator, unsigned selector) 15704367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell{ 15714367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_dev *rdev = regulator->rdev; 15724367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell struct regulator_ops *ops = rdev->desc->ops; 15734367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell int ret; 15744367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15754367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (!ops->list_voltage || selector >= rdev->desc->n_voltages) 15764367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return -EINVAL; 15774367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15784367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell mutex_lock(&rdev->mutex); 15794367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = ops->list_voltage(rdev, selector); 15804367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell mutex_unlock(&rdev->mutex); 15814367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15824367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ret > 0) { 15834367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell if (ret < rdev->constraints->min_uV) 15844367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = 0; 15854367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell else if (ret > rdev->constraints->max_uV) 15864367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell ret = 0; 15874367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell } 15884367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15894367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell return ret; 15904367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell} 15914367cfdc7c657ad8a797f51b9ffd3c64b31910e7David BrownellEXPORT_SYMBOL_GPL(regulator_list_voltage); 15924367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell 15934367cfdc7c657ad8a797f51b9ffd3c64b31910e7David Brownell/** 1594a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * regulator_is_supported_voltage - check if a voltage range can be supported 1595a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * 1596a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @regulator: Regulator to check. 1597a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @min_uV: Minimum required voltage in uV. 1598a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * @max_uV: Maximum required voltage in uV. 1599a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * 1600a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown * Returns a boolean or a negative error code. 1601a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown */ 1602a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brownint regulator_is_supported_voltage(struct regulator *regulator, 1603a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown int min_uV, int max_uV) 1604a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown{ 1605a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown int i, voltages, ret; 1606a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1607a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown ret = regulator_count_voltages(regulator); 1608a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown if (ret < 0) 1609a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return ret; 1610a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown voltages = ret; 1611a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1612a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown for (i = 0; i < voltages; i++) { 1613a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown ret = regulator_list_voltage(regulator, i); 1614a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1615a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown if (ret >= min_uV && ret <= max_uV) 1616a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return 1; 1617a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown } 1618a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1619a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown return 0; 1620a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown} 1621a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown 1622a7a1ad9066e0266c8a4357ba3dbaeebfb80f531dMark Brown/** 1623414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_voltage - set regulator output voltage 1624414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1625414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uV: Minimum required voltage in uV 1626414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uV: Maximum acceptable voltage in uV 1627414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1628414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets a voltage regulator to the desired output voltage. This can be set 1629414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * during any regulator state. IOW, regulator can be disabled or enabled. 1630414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1631414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the voltage will change to the new value 1632414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1633414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new voltage when enabled. 1634414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1635414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is shared between several devices then the lowest 1636414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * request voltage that meets the system constraints will be used. 163769279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * Regulator system constraints must be set for this regulator before 1638414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1639414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1640414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV) 1641414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1642414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1643414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 16443a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown unsigned selector; 1645414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1646414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1647414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1648414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1649414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_voltage) { 1650414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1651414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1652414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1653414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1654414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1655414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_voltage(rdev, &min_uV, &max_uV); 1656414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1657414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1658414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->min_uV = min_uV; 1659414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->max_uV = max_uV; 16603a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown 166105fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni ret = regulator_check_consumers(rdev, &min_uV, &max_uV); 166205fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni if (ret < 0) 166305fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni goto out; 166405fda3b1abc23d832144e9497fb218870927d645Thomas Petazzoni 166502fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_set_voltage(rdev_get_name(rdev), min_uV, max_uV); 166602fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 16673a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown ret = rdev->desc->ops->set_voltage(rdev, min_uV, max_uV, &selector); 16683a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown 16693a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown if (rdev->desc->ops->list_voltage) 16703a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown selector = rdev->desc->ops->list_voltage(rdev, selector); 16713a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown else 16723a93f2a9f4d8f73d74c0e552feb68a10f778a219Mark Brown selector = -1; 1673414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 167402fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown trace_regulator_set_voltage_complete(rdev_get_name(rdev), selector); 167502fa3ec01a0df7a8ccc356d8e245a9a1423b3596Mark Brown 1676414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1677b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron _notifier_call_chain(rdev, REGULATOR_EVENT_VOLTAGE_CHANGE, NULL); 1678414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1679414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1680414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1681414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_voltage); 1682414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1683414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_voltage(struct regulator_dev *rdev) 1684414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1685414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1686414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->desc->ops->get_voltage) 1687414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->ops->get_voltage(rdev); 1688414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1689414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 1690414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1691414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1692414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1693414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_voltage - get regulator output voltage 1694414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1695414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1696414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current regulator voltage in uV. 1697414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1698414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the voltage value. This 1699414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1700414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1701414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_voltage(struct regulator *regulator) 1702414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1703414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1704414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1705414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator->rdev->mutex); 1706414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1707414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = _regulator_get_voltage(regulator->rdev); 1708414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1709414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator->rdev->mutex); 1710414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1711414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1712414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1713414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_voltage); 1714414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1715414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1716414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_current_limit - set regulator output current limit 1717414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1718414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @min_uA: Minimuum supported current in uA 1719414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @max_uA: Maximum supported current in uA 1720414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1721414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Sets current sink to the desired output current. This can be set during 1722414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * any regulator state. IOW, regulator can be disabled or enabled. 1723414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1724414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * If the regulator is enabled then the current will change to the new value 1725414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * immediately otherwise if the regulator is disabled the regulator will 1726414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * output at the new current when enabled. 1727414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1728414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1729414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1730414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1731414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_current_limit(struct regulator *regulator, 1732414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int min_uA, int max_uA) 1733414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1734414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1735414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1736414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1737414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1738414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1739414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1740414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_current_limit) { 1741414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1742414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1743414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1744414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1745414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1746414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_current_limit(rdev, &min_uA, &max_uA); 1747414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1748414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1749414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1750414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_current_limit(rdev, min_uA, max_uA); 1751414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1752414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1753414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1754414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1755414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_current_limit); 1756414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1757414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int _regulator_get_current_limit(struct regulator_dev *rdev) 1758414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1759414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1760414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1761414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1762414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1763414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1764414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_current_limit) { 1765414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1766414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1767414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1768414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1769414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_current_limit(rdev); 1770414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1771414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1772414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1773414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1774414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1775414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1776414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_current_limit - get regulator output current 1777414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1778414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1779414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This returns the current supplied by the specified current sink in uA. 1780414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1781414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: If the regulator is disabled it will return the current value. This 1782414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * function should not be used to determine regulator state. 1783414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1784414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_get_current_limit(struct regulator *regulator) 1785414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1786414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_current_limit(regulator->rdev); 1787414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1788414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_current_limit); 1789414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1790414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1791414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_mode - set regulator operating mode 1792414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1793414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @mode: operating mode - one of the REGULATOR_MODE constants 1794414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1795414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Set regulator operating mode to increase regulator efficiency or improve 1796414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulation performance. 1797414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1798414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * NOTE: Regulator system constraints must be set for this regulator before 1799414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * calling this function otherwise this call will fail. 1800414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1801414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_mode(struct regulator *regulator, unsigned int mode) 1802414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1803414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1804414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1805500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer int regulator_curr_mode; 1806414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1807414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1808414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1809414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1810414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->set_mode) { 1811414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1812414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1813414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1814414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1815500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer /* return if the same mode is requested */ 1816500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer if (rdev->desc->ops->get_mode) { 1817500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer regulator_curr_mode = rdev->desc->ops->get_mode(rdev); 1818500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer if (regulator_curr_mode == mode) { 1819500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer ret = 0; 1820500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer goto out; 1821500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer } 1822500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer } 1823500b4ac90d1103a7c302d5bb16c53f4ffc45d057Sundar R Iyer 1824414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* constraints check */ 1825414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_mode(rdev, mode); 1826414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1827414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1828414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1829414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1830414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1831414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1832414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1833414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1834414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_mode); 1835414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1836414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic unsigned int _regulator_get_mode(struct regulator_dev *rdev) 1837414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1838414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 1839414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1840414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1841414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1842414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1843414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_mode) { 1844414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1845414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1846414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1847414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1848414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->get_mode(rdev); 1849414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1850414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1851414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1852414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1853414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1854414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1855414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_mode - get regulator operating mode 1856414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1857414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1858414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get the current regulator operating mode. 1859414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1860414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodunsigned int regulator_get_mode(struct regulator *regulator) 1861414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1862414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return _regulator_get_mode(regulator->rdev); 1863414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1864414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_mode); 1865414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1866414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1867414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_optimum_mode - set regulator optimum operating mode 1868414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 1869414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @uA_load: load current 1870414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1871414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Notifies the regulator core of a new device load. This is then used by 1872414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS (if enabled by constraints) to set the most efficient regulator 1873414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * operating mode for the new regulator loading. 1874414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1875414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Consumer devices notify their supply regulator of the maximum power 1876414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * they will require (can be taken from device datasheet in the power 1877414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption tables) when they change operational status and hence power 1878414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * state. Examples of operational state changes that can affect power 1879414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumption are :- 1880414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1881414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is opened / closed. 1882414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device I/O is about to begin or has just finished. 1883414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * o Device is idling in between work. 1884414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1885414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This information is also exported via sysfs to userspace. 1886414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1887414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * DRMS will sum the total requested load on the regulator and change 1888414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * to the most efficient operating mode if platform constraints allow. 1889414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1890414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns the new regulator mode or error. 1891414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1892414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_set_optimum_mode(struct regulator *regulator, int uA_load) 1893414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1894414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev = regulator->rdev; 1895414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator *consumer; 1896414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret, output_uV, input_uV, total_uA_load = 0; 1897414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned int mode; 1898414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1899414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 1900414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1901414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->uA_load = uA_load; 1902414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_check_drms(rdev); 1903414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) 1904414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1905414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = -EINVAL; 1906414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1907414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* sanity check */ 1908414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (!rdev->desc->ops->get_optimum_mode) 1909414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1910414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1911414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get output voltage */ 1912414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood output_uV = rdev->desc->ops->get_voltage(rdev); 1913414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (output_uV <= 0) { 19145da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "invalid output voltage found\n"); 1915414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1916414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1917414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1918414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* get input voltage */ 1919414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply && rdev->supply->desc->ops->get_voltage) 1920414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->supply->desc->ops->get_voltage(rdev->supply); 1921414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood else 1922414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV = rdev->constraints->input_uV; 1923414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (input_uV <= 0) { 19245da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "invalid input voltage found\n"); 1925414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1926414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1927414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1928414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* calc total requested load for this regulator */ 1929414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(consumer, &rdev->consumer_list, list) 1930fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese total_uA_load += consumer->uA_load; 1931414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1932414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mode = rdev->desc->ops->get_optimum_mode(rdev, 1933414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood input_uV, output_uV, 1934414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood total_uA_load); 1935e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell ret = regulator_check_mode(rdev, mode); 1936e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell if (ret < 0) { 19375da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to get optimum mode @ %d uA %d -> %d uV\n", 19385da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches total_uA_load, input_uV, output_uV); 1939414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1940414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1941414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1942414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = rdev->desc->ops->set_mode(rdev, mode); 1943e573520b171095c106ffbbbf4f9cbed6d9bff576David Brownell if (ret < 0) { 19445da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to set optimum mode %x\n", mode); 1945414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 1946414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 1947414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = mode; 1948414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 1949414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 1950414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 1951414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1952414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_optimum_mode); 1953414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1954414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1955414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register_notifier - register regulator event notifier 1956414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 195769279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @nb: notifier block 1958414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1959414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Register notifier block to receive regulator events. 1960414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1961414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_register_notifier(struct regulator *regulator, 1962414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1963414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1964414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_register(®ulator->rdev->notifier, 1965414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1966414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1967414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register_notifier); 1968414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1969414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 1970414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister_notifier - unregister regulator event notifier 1971414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator source 197269279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @nb: notifier block 1973414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 1974414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Unregister regulator event notifier block. 1975414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 1976414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_unregister_notifier(struct regulator *regulator, 1977414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct notifier_block *nb) 1978414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1979414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return blocking_notifier_chain_unregister(®ulator->rdev->notifier, 1980414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood nb); 1981414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 1982414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister_notifier); 1983414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1984b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron/* notify regulator consumers and downstream regulator consumers. 1985b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron * Note mutex must be held by caller. 1986b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron */ 1987414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic void _notifier_call_chain(struct regulator_dev *rdev, 1988414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 1989414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 1990414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *_rdev; 1991414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1992414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* call rdev chain first */ 1993414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood blocking_notifier_call_chain(&rdev->notifier, event, NULL); 1994414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 1995414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* now notify regulator we supply */ 1996b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron list_for_each_entry(_rdev, &rdev->supply_list, slist) { 1997fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese mutex_lock(&_rdev->mutex); 1998fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese _notifier_call_chain(_rdev, event, data); 1999fa2984d4691c96367d6666694ecc6744135174c6Stefan Roese mutex_unlock(&_rdev->mutex); 2000b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron } 2001414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2002414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2003414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2004414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_get - get multiple regulator consumers 2005414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2006414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @dev: Device to supply 2007414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers to register 2008414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Configuration of consumers; clients are stored here. 2009414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2010414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure. 2011414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2012414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This helper function allows drivers to get several regulator 2013414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * consumers in one operation. If any of the regulators cannot be 2014414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * acquired then any regulators that were allocated will be freed 2015414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * before returning to the caller. 2016414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2017414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_get(struct device *dev, int num_consumers, 2018414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2019414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2020414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2021414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 2022414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2023414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) 2024414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 2025414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2026414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2027414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = regulator_get(dev, 2028414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].supply); 2029414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (IS_ERR(consumers[i].consumer)) { 2030414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = PTR_ERR(consumers[i].consumer); 20315b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown dev_err(dev, "Failed to get supply '%s': %d\n", 20325b307627738f1f6cbc31fad9e28a299b5fe55602Mark Brown consumers[i].supply, ret); 2033414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 2034414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 2035414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2036414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2037414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2038414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 2039414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2040414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 2041414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers && consumers[i].consumer; i++) 2042414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 2043414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2044414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2045414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2046414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_get); 2047414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2048414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2049414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_enable - enable multiple regulator consumers 2050414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2051414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 2052414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 2053414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 2054414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2055414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to enable multiple regulator 2056414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 2057414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were enabled will be disabled again prior to 2058414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 2059414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2060414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_enable(int num_consumers, 2061414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2062414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2063414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2064414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 2065414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2066414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2067414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_enable(consumers[i].consumer); 2068414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 2069414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 2070414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2071414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2072414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 2073414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2074414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 20755da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches pr_err("Failed to enable %s: %d\n", consumers[i].supply, ret); 2076eb143ac1b9f56ca9c6dc782d795acda1f60c5fd2Lars-Peter Clausen for (--i; i >= 0; --i) 2077414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_disable(consumers[i].consumer); 2078414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2079414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2080414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2081414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_enable); 2082414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2083414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2084414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_disable - disable multiple regulator consumers 2085414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2086414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 2087414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 2088414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @return 0 on success, an errno on failure 2089414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2090414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to disable multiple regulator 2091414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. If any consumers cannot be enabled 2092414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * then any others that were disabled will be disabled again prior to 2093414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * return. 2094414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2095414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_bulk_disable(int num_consumers, 2096414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2097414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2098414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2099414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret; 2100414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2101414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2102414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = regulator_disable(consumers[i].consumer); 2103414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret != 0) 2104414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto err; 2105414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2106414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2107414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return 0; 2108414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2109414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwooderr: 21105da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches pr_err("Failed to disable %s: %d\n", consumers[i].supply, ret); 2111eb143ac1b9f56ca9c6dc782d795acda1f60c5fd2Lars-Peter Clausen for (--i; i >= 0; --i) 2112414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_enable(consumers[i].consumer); 2113414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2114414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2115414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2116414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_disable); 2117414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2118414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2119414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_bulk_free - free multiple regulator consumers 2120414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2121414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @num_consumers: Number of consumers 2122414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @consumers: Consumer data; clients are stored here. 2123414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2124414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This convenience API allows consumers to free multiple regulator 2125414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * clients in a single API call. 2126414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2127414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_bulk_free(int num_consumers, 2128414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_bulk_data *consumers) 2129414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2130414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int i; 2131414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2132414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood for (i = 0; i < num_consumers; i++) { 2133414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator_put(consumers[i].consumer); 2134414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood consumers[i].consumer = NULL; 2135414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2136414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2137414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_bulk_free); 2138414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2139414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2140414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_notifier_call_chain - call regulator event notifier 214169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator source 2142414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @event: notifier block 214369279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @data: callback-specific data. 2144414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2145414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to notify clients a regulator event has 2146414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * occurred. We also notify regulator clients downstream. 2147b136fb4463d13eea129bf090a8a465bba6bf0003Jonathan Cameron * Note lock must be held by caller. 2148414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2149414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_notifier_call_chain(struct regulator_dev *rdev, 2150414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood unsigned long event, void *data) 2151414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2152414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood _notifier_call_chain(rdev, event, data); 2153414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return NOTIFY_DONE; 2154414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2155414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2156414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_notifier_call_chain); 2157414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2158be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown/** 2159be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * regulator_mode_to_status - convert a regulator mode into a status 2160be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * 2161be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * @mode: Mode to convert 2162be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * 2163be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown * Convert a regulator mode into a status. 2164be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown */ 2165be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brownint regulator_mode_to_status(unsigned int mode) 2166be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown{ 2167be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown switch (mode) { 2168be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_FAST: 2169be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_FAST; 2170be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_NORMAL: 2171be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_NORMAL; 2172be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_MODE_IDLE: 2173be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_IDLE; 2174be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown case REGULATOR_STATUS_STANDBY: 2175be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return REGULATOR_STATUS_STANDBY; 2176be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown default: 2177be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown return 0; 2178be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown } 2179be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown} 2180be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark BrownEXPORT_SYMBOL_GPL(regulator_mode_to_status); 2181be721979dd6b335e4ab6f83abb5cc11c33662aa8Mark Brown 21827ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell/* 21837ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * To avoid cluttering sysfs (and memory) with useless state, only 21847ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * create attributes that can be meaningfully displayed. 21857ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 21867ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownellstatic int add_regulator_attributes(struct regulator_dev *rdev) 21877ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell{ 21887ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell struct device *dev = &rdev->dev; 21897ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell struct regulator_ops *ops = rdev->desc->ops; 21907ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell int status = 0; 21917ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 21927ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* some attributes need specific methods to be displayed */ 21937ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_voltage) { 21947ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_microvolts); 21957ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 21967ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 21977ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 21987ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_current_limit) { 21997ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_microamps); 22007ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22017ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22027ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22037ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->get_mode) { 22047ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_opmode); 22057ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22067ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22077ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22087ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->is_enabled) { 22097ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_state); 22107ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22117ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22127ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 2213853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (ops->get_status) { 2214853116a10544206b6b2cf42ebc9d78fba2668888David Brownell status = device_create_file(dev, &dev_attr_status); 2215853116a10544206b6b2cf42ebc9d78fba2668888David Brownell if (status < 0) 2216853116a10544206b6b2cf42ebc9d78fba2668888David Brownell return status; 2217853116a10544206b6b2cf42ebc9d78fba2668888David Brownell } 22187ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22197ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* some attributes are type-specific */ 22207ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (rdev->desc->type == REGULATOR_CURRENT) { 22217ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_requested_microamps); 22227ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22237ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22247ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22257ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22267ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* all the other attributes exist to support constraints; 22277ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * don't show them if there are no constraints, or if the 22287ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell * relevant supporting methods are missing. 22297ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell */ 22307ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (!rdev->constraints) 22317ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22327ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22337ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* constraints need specific supporting methods */ 22347ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_voltage) { 22357ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_min_microvolts); 22367ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22377ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22387ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_max_microvolts); 22397ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22407ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22417ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22427ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_current_limit) { 22437ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_min_microamps); 22447ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22457ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22467ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_max_microamps); 22477ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22487ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22497ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22507ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22517ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* suspend mode constraints need multiple supporting methods */ 22527ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (!(ops->set_suspend_enable && ops->set_suspend_disable)) 22537ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22547ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22557ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_standby_state); 22567ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22577ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22587ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_mem_state); 22597ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22607ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22617ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, &dev_attr_suspend_disk_state); 22627ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22637ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22647ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22657ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_suspend_voltage) { 22667ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22677ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_standby_microvolts); 22687ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22697ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22707ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22717ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_mem_microvolts); 22727ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22737ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22747ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22757ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_disk_microvolts); 22767ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22777ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22787ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22797ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22807ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ops->set_suspend_mode) { 22817ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22827ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_standby_mode); 22837ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22847ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22857ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22867ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_mem_mode); 22877ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22887ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22897ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell status = device_create_file(dev, 22907ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell &dev_attr_suspend_disk_mode); 22917ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (status < 0) 22927ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22937ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell } 22947ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 22957ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell return status; 22967ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell} 22977ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 2298414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2299414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_register - register regulator 230069279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @regulator_desc: regulator to register 230169279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @dev: struct device for the regulator 23020527100fd11d9710c7e153d791da78824b7b46faMark Brown * @init_data: platform provided init data, passed through by driver 230369279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @driver_data: private regulator data 2304414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2305414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to register a regulator. 2306414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Returns 0 on success. 2307414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2308414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstruct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, 2309f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown struct device *dev, const struct regulator_init_data *init_data, 23100527100fd11d9710c7e153d791da78824b7b46faMark Brown void *driver_data) 2311414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2312414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood static atomic_t regulator_no = ATOMIC_INIT(0); 2313414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 2314a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood int ret, i; 2315414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2316414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc == NULL) 2317414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2318414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2319414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (regulator_desc->name == NULL || regulator_desc->ops == NULL) 2320414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2321414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2322cd78dfc6c6e321a310a73ef7b0df3d262704dd55Diego Liziero if (regulator_desc->type != REGULATOR_VOLTAGE && 2323cd78dfc6c6e321a310a73ef7b0df3d262704dd55Diego Liziero regulator_desc->type != REGULATOR_CURRENT) 2324414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-EINVAL); 2325414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 232646fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown if (!init_data) 232746fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown return ERR_PTR(-EINVAL); 232846fabe1edd44a8893d88d7982f88d01ccf77f0bbMark Brown 2329414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev = kzalloc(sizeof(struct regulator_dev), GFP_KERNEL); 2330414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 2331414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ERR_PTR(-ENOMEM); 2332414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2333414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 2334414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2335414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_init(&rdev->mutex); 2336a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->reg_data = driver_data; 2337414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->owner = regulator_desc->owner; 2338414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->desc = regulator_desc; 2339414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->consumer_list); 2340414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->supply_list); 2341414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->list); 2342414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood INIT_LIST_HEAD(&rdev->slist); 2343414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood BLOCKING_INIT_NOTIFIER_HEAD(&rdev->notifier); 2344414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2345a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* preform any regulator specific init */ 2346a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->regulator_init) { 2347a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = init_data->regulator_init(rdev->reg_data); 23484fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 23494fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 2350a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 2351a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2352a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* register with sysfs */ 2353414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood rdev->dev.class = ®ulator_class; 2354a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood rdev->dev.parent = dev; 2355812460a927c1d0dc1fbdbec9aa07de1b04043d83Kay Sievers dev_set_name(&rdev->dev, "regulator.%d", 2356812460a927c1d0dc1fbdbec9aa07de1b04043d83Kay Sievers atomic_inc_return(®ulator_no) - 1); 2357a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = device_register(&rdev->dev); 2358ad7725cb43b8badb2fec2c2bfca07c067f2e19a7Vasiliy Kulikov if (ret != 0) { 2359ad7725cb43b8badb2fec2c2bfca07c067f2e19a7Vasiliy Kulikov put_device(&rdev->dev); 23604fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto clean; 2361ad7725cb43b8badb2fec2c2bfca07c067f2e19a7Vasiliy Kulikov } 2362a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2363a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_set_drvdata(&rdev->dev, rdev); 2364a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 236574f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport /* set regulator constraints */ 236674f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport ret = set_machine_constraints(rdev, &init_data->constraints); 236774f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport if (ret < 0) 236874f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport goto scrub; 236974f544c1fc0339acf6f66ff438b8543b1f9faf10Mike Rapoport 23707ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell /* add attributes supported by this regulator */ 23717ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell ret = add_regulator_attributes(rdev); 23727ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell if (ret < 0) 23737ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell goto scrub; 23747ad68e2f970fd84d15ad67ce3216aed05f944a9cDavid Brownell 2375a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* set supply regulator if it exists */ 23760178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (init_data->supply_regulator && init_data->supply_regulator_dev) { 23770178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown dev_err(dev, 23780178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown "Supply regulator specified by both name and dev\n"); 23797727da22e820a96ab394db2fc0ab58f7f7ecb323Axel Lin ret = -EINVAL; 23800178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown goto scrub; 23810178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23820178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 23830178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (init_data->supply_regulator) { 23840178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown struct regulator_dev *r; 23850178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown int found = 0; 23860178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 23870178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown list_for_each_entry(r, ®ulator_list, list) { 23880178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (strcmp(rdev_get_name(r), 23890178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown init_data->supply_regulator) == 0) { 23900178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown found = 1; 23910178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown break; 23920178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23930178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 23940178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 23950178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (!found) { 23960178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown dev_err(dev, "Failed to find supply %s\n", 23970178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown init_data->supply_regulator); 23987727da22e820a96ab394db2fc0ab58f7f7ecb323Axel Lin ret = -ENODEV; 23990178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown goto scrub; 24000178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 24010178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 24020178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown ret = set_supply(rdev, r); 24030178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown if (ret < 0) 24040178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown goto scrub; 24050178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown } 24060178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown 2407a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood if (init_data->supply_regulator_dev) { 24080178f3e28e2166664916265c5d4922b1376b9fa1Mark Brown dev_warn(dev, "Uses supply_regulator_dev instead of regulator_supply\n"); 2409a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_supply(rdev, 2410a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood dev_get_drvdata(init_data->supply_regulator_dev)); 24114fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell if (ret < 0) 24124fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto scrub; 2413a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood } 2414a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2415a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood /* add consumers devices */ 2416a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood for (i = 0; i < init_data->num_consumer_supplies; i++) { 2417a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood ret = set_consumer_device_supply(rdev, 2418a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].dev, 241940f9244f4da8976eeb6d5ed6313c635ba238a9d3Mark Brown init_data->consumer_supplies[i].dev_name, 2420a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood init_data->consumer_supplies[i].supply); 2421d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula if (ret < 0) 2422d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula goto unset_supplies; 2423414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2424a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2425a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood list_add(&rdev->list, ®ulator_list); 2426a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodout: 2427414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2428414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev; 24294fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell 2430d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikulaunset_supplies: 2431d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula unset_regulator_supplies(rdev); 2432d4033b54fc91221b13e2850bf298683c0f2ff37dJani Nikula 24334fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellscrub: 24344fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell device_unregister(&rdev->dev); 243553032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley /* device core frees rdev */ 243653032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley rdev = ERR_PTR(ret); 243753032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley goto out; 243853032dafc6b93ac178ca2340ff8eb4ee2b3d1a92Paul Walmsley 24394fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownellclean: 24404fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell kfree(rdev); 24414fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell rdev = ERR_PTR(ret); 24424fca9545d17b99cdb2774716b034c62a70151bcdDavid Brownell goto out; 2443414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2444414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_register); 2445414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2446414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2447414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_unregister - unregister regulator 244869279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator to unregister 2449414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2450414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Called by regulator drivers to unregister a regulator. 2451414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2452414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_unregister(struct regulator_dev *rdev) 2453414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2454414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev == NULL) 2455414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return; 2456414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2457414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 24586bf87d17c9f5b855e9dde7b3d6f726385b966814Mark Brown WARN_ON(rdev->open_count); 24590f1d747bfa89de4ca52dc1dffdcce35a2b8a1532Mike Rapoport unset_regulator_supplies(rdev); 2460414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_del(&rdev->list); 2461414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (rdev->supply) 2462414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood sysfs_remove_link(&rdev->dev.kobj, "supply"); 2463414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood device_unregister(&rdev->dev); 2464f8c12fe329c8da9f50d8b2b1183eeaa4d587e747Mark Brown kfree(rdev->constraints); 2465414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2466414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2467414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_unregister); 2468414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2469414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2470cf7bbcdf4d267eff580cb7ce6cf4fe16a940a005Mark Brown * regulator_suspend_prepare - prepare regulators for system wide suspend 2471414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @state: system suspend state 2472414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2473414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Configure each regulator with it's suspend operating parameters for state. 2474414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * This will usually be called by machine suspend code prior to supending. 2475414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2476414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint regulator_suspend_prepare(suspend_state_t state) 2477414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2478414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood struct regulator_dev *rdev; 2479414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood int ret = 0; 2480414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2481414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood /* ON is handled by regulator active state */ 2482414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (state == PM_SUSPEND_ON) 2483414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return -EINVAL; 2484414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2485414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(®ulator_list_mutex); 2486414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood list_for_each_entry(rdev, ®ulator_list, list) { 2487414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2488414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_lock(&rdev->mutex); 2489414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood ret = suspend_prepare(rdev, state); 2490414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(&rdev->mutex); 2491414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2492414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood if (ret < 0) { 24935da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "failed to prepare\n"); 2494414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood goto out; 2495414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2496414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood } 2497414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodout: 2498414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood mutex_unlock(®ulator_list_mutex); 2499414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return ret; 2500414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2501414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_suspend_prepare); 2502414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2503414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2504ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * regulator_has_full_constraints - the system has fully specified constraints 2505ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * 2506ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * Calling this function will cause the regulator API to disable all 2507ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * regulators which have a zero use count and don't have an always_on 2508ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * constraint in a late_initcall. 2509ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * 2510ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * The intention is that this will become the default behaviour in a 2511ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * future kernel release so users are encouraged to use this facility 2512ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * now. 2513ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2514ca7255614e0861e36480103f4a402a115803d7b5Mark Brownvoid regulator_has_full_constraints(void) 2515ca7255614e0861e36480103f4a402a115803d7b5Mark Brown{ 2516ca7255614e0861e36480103f4a402a115803d7b5Mark Brown has_full_constraints = 1; 2517ca7255614e0861e36480103f4a402a115803d7b5Mark Brown} 2518ca7255614e0861e36480103f4a402a115803d7b5Mark BrownEXPORT_SYMBOL_GPL(regulator_has_full_constraints); 2519ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2520ca7255614e0861e36480103f4a402a115803d7b5Mark Brown/** 2521688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * regulator_use_dummy_regulator - Provide a dummy regulator when none is found 2522688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * 2523688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * Calling this function will cause the regulator API to provide a 2524688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * dummy regulator to consumers if no physical regulator is found, 2525688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * allowing most consumers to proceed as though a regulator were 2526688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * configured. This allows systems such as those with software 2527688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * controllable regulators for the CPU core only to be brought up more 2528688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown * readily. 2529688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown */ 2530688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brownvoid regulator_use_dummy_regulator(void) 2531688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown{ 2532688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown board_wants_dummy_regulator = true; 2533688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown} 2534688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark BrownEXPORT_SYMBOL_GPL(regulator_use_dummy_regulator); 2535688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown 2536688fe99a439f7c9dfcc52fbf7cb347f140a2dc8bMark Brown/** 2537414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * rdev_get_drvdata - get rdev regulator driver data 253869279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator 2539414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2540414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get rdev regulator driver private data. This call can be used in the 2541414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator driver context. 2542414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2543414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *rdev_get_drvdata(struct regulator_dev *rdev) 2544414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2545414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->reg_data; 2546414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2547414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_drvdata); 2548414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2549414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2550414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_drvdata - get regulator driver data 2551414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 2552414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * 2553414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * Get regulator driver private data. This call can be used in the consumer 2554414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * driver context when non API regulator specific functions need to be called. 2555414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2556414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid *regulator_get_drvdata(struct regulator *regulator) 2557414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2558414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return regulator->rdev->reg_data; 2559414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2560414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_drvdata); 2561414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2562414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2563414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_set_drvdata - set regulator driver data 2564414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @regulator: regulator 2565414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * @data: data 2566414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2567414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodvoid regulator_set_drvdata(struct regulator *regulator, void *data) 2568414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2569414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood regulator->rdev->reg_data = data; 2570414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2571414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_set_drvdata); 2572414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2573414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/** 2574414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood * regulator_get_id - get regulator ID 257569279fb9a95051971ac03e558c4d46e7ba84ab3aMark Brown * @rdev: regulator 2576414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood */ 2577414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodint rdev_get_id(struct regulator_dev *rdev) 2578414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 2579414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood return rdev->desc->id; 2580414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2581414c70cb91c445ec813b61e16fe4882807e40240Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_id); 2582414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2583a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodstruct device *rdev_get_dev(struct regulator_dev *rdev) 2584a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 2585a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return &rdev->dev; 2586a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 2587a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(rdev_get_dev); 2588a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2589a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwoodvoid *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data) 2590a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood{ 2591a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood return reg_init_data->driver_data; 2592a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood} 2593a5766f11cfd3a0c03450d99c8fe548c2940be884Liam GirdwoodEXPORT_SYMBOL_GPL(regulator_get_init_drvdata); 2594a5766f11cfd3a0c03450d99c8fe548c2940be884Liam Girdwood 2595414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodstatic int __init regulator_init(void) 2596414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood{ 259734abbd68efe09765465b81dfedeee9994f13302fMark Brown int ret; 259834abbd68efe09765465b81dfedeee9994f13302fMark Brown 259934abbd68efe09765465b81dfedeee9994f13302fMark Brown ret = class_register(®ulator_class); 260034abbd68efe09765465b81dfedeee9994f13302fMark Brown 260134abbd68efe09765465b81dfedeee9994f13302fMark Brown regulator_dummy_init(); 260234abbd68efe09765465b81dfedeee9994f13302fMark Brown 260334abbd68efe09765465b81dfedeee9994f13302fMark Brown return ret; 2604414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood} 2605414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood 2606414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwood/* init early to allow our consumers to complete system booting */ 2607414c70cb91c445ec813b61e16fe4882807e40240Liam Girdwoodcore_initcall(regulator_init); 2608ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2609ca7255614e0861e36480103f4a402a115803d7b5Mark Brownstatic int __init regulator_init_complete(void) 2610ca7255614e0861e36480103f4a402a115803d7b5Mark Brown{ 2611ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulator_dev *rdev; 2612ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulator_ops *ops; 2613ca7255614e0861e36480103f4a402a115803d7b5Mark Brown struct regulation_constraints *c; 2614ca7255614e0861e36480103f4a402a115803d7b5Mark Brown int enabled, ret; 2615ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2616ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_lock(®ulator_list_mutex); 2617ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2618ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* If we have a full configuration then disable any regulators 2619ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * which are not in use or always_on. This will become the 2620ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * default behaviour in the future. 2621ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 2622ca7255614e0861e36480103f4a402a115803d7b5Mark Brown list_for_each_entry(rdev, ®ulator_list, list) { 2623ca7255614e0861e36480103f4a402a115803d7b5Mark Brown ops = rdev->desc->ops; 2624ca7255614e0861e36480103f4a402a115803d7b5Mark Brown c = rdev->constraints; 2625ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2626f25e0b4fcc38d120e704c377791158c4b2a54daaMark Brown if (!ops->disable || (c && c->always_on)) 2627ca7255614e0861e36480103f4a402a115803d7b5Mark Brown continue; 2628ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2629ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_lock(&rdev->mutex); 2630ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2631ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (rdev->use_count) 2632ca7255614e0861e36480103f4a402a115803d7b5Mark Brown goto unlock; 2633ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2634ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* If we can't read the status assume it's on. */ 2635ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (ops->is_enabled) 2636ca7255614e0861e36480103f4a402a115803d7b5Mark Brown enabled = ops->is_enabled(rdev); 2637ca7255614e0861e36480103f4a402a115803d7b5Mark Brown else 2638ca7255614e0861e36480103f4a402a115803d7b5Mark Brown enabled = 1; 2639ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2640ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (!enabled) 2641ca7255614e0861e36480103f4a402a115803d7b5Mark Brown goto unlock; 2642ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2643ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (has_full_constraints) { 2644ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* We log since this may kill the system if it 2645ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * goes wrong. */ 26465da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_info(rdev, "disabling\n"); 2647ca7255614e0861e36480103f4a402a115803d7b5Mark Brown ret = ops->disable(rdev); 2648ca7255614e0861e36480103f4a402a115803d7b5Mark Brown if (ret != 0) { 26495da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_err(rdev, "couldn't disable: %d\n", ret); 2650ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2651ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } else { 2652ca7255614e0861e36480103f4a402a115803d7b5Mark Brown /* The intention is that in future we will 2653ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * assume that full constraints are provided 2654ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * so warn even if we aren't going to do 2655ca7255614e0861e36480103f4a402a115803d7b5Mark Brown * anything here. 2656ca7255614e0861e36480103f4a402a115803d7b5Mark Brown */ 26575da84fd99bb1ab1c7cd39d0cf7c08bb63931a59aJoe Perches rdev_warn(rdev, "incomplete constraints, leaving on\n"); 2658ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2659ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2660ca7255614e0861e36480103f4a402a115803d7b5Mark Brownunlock: 2661ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_unlock(&rdev->mutex); 2662ca7255614e0861e36480103f4a402a115803d7b5Mark Brown } 2663ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2664ca7255614e0861e36480103f4a402a115803d7b5Mark Brown mutex_unlock(®ulator_list_mutex); 2665ca7255614e0861e36480103f4a402a115803d7b5Mark Brown 2666ca7255614e0861e36480103f4a402a115803d7b5Mark Brown return 0; 2667ca7255614e0861e36480103f4a402a115803d7b5Mark Brown} 2668ca7255614e0861e36480103f4a402a115803d7b5Mark Brownlate_initcall(regulator_init_complete); 2669