| /* |
| * consumer.h -- SoC Regulator consumer support. |
| * |
| * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC. |
| * |
| * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Regulator Consumer Interface. |
| * |
| * A Power Management Regulator framework for SoC based devices. |
| * Features:- |
| * o Voltage and current level control. |
| * o Operating mode control. |
| * o Regulator status. |
| * o sysfs entries for showing client devices and status |
| * |
| * EXPERIMENTAL FEATURES: |
| * Dynamic Regulator operating Mode Switching (DRMS) - allows regulators |
| * to use most efficient operating mode depending upon voltage and load and |
| * is transparent to client drivers. |
| * |
| * e.g. Devices x,y,z share regulator r. Device x and y draw 20mA each during |
| * IO and 1mA at idle. Device z draws 100mA when under load and 5mA when |
| * idling. Regulator r has > 90% efficiency in NORMAL mode at loads > 100mA |
| * but this drops rapidly to 60% when below 100mA. Regulator r has > 90% |
| * efficiency in IDLE mode at loads < 10mA. Thus regulator r will operate |
| * in normal mode for loads > 10mA and in IDLE mode for load <= 10mA. |
| * |
| */ |
| |
| #ifndef __LINUX_REGULATOR_CONSUMER_H_ |
| #define __LINUX_REGULATOR_CONSUMER_H_ |
| |
| struct device; |
| struct notifier_block; |
| |
| /* |
| * Regulator operating modes. |
| * |
| * Regulators can run in a variety of different operating modes depending on |
| * output load. This allows further system power savings by selecting the |
| * best (and most efficient) regulator mode for a desired load. |
| * |
| * Most drivers will only care about NORMAL. The modes below are generic and |
| * will probably not match the naming convention of your regulator data sheet |
| * but should match the use cases in the datasheet. |
| * |
| * In order of power efficiency (least efficient at top). |
| * |
| * Mode Description |
| * FAST Regulator can handle fast changes in it's load. |
| * e.g. useful in CPU voltage & frequency scaling where |
| * load can quickly increase with CPU frequency increases. |
| * |
| * NORMAL Normal regulator power supply mode. Most drivers will |
| * use this mode. |
| * |
| * IDLE Regulator runs in a more efficient mode for light |
| * loads. Can be used for devices that have a low power |
| * requirement during periods of inactivity. This mode |
| * may be more noisy than NORMAL and may not be able |
| * to handle fast load switching. |
| * |
| * STANDBY Regulator runs in the most efficient mode for very |
| * light loads. Can be used by devices when they are |
| * in a sleep/standby state. This mode is likely to be |
| * the most noisy and may not be able to handle fast load |
| * switching. |
| * |
| * NOTE: Most regulators will only support a subset of these modes. Some |
| * will only just support NORMAL. |
| * |
| * These modes can be OR'ed together to make up a mask of valid register modes. |
| */ |
| |
| #define REGULATOR_MODE_FAST 0x1 |
| #define REGULATOR_MODE_NORMAL 0x2 |
| #define REGULATOR_MODE_IDLE 0x4 |
| #define REGULATOR_MODE_STANDBY 0x8 |
| |
| /* |
| * Regulator notifier events. |
| * |
| * UNDER_VOLTAGE Regulator output is under voltage. |
| * OVER_CURRENT Regulator output current is too high. |
| * REGULATION_OUT Regulator output is out of regulation. |
| * FAIL Regulator output has failed. |
| * OVER_TEMP Regulator over temp. |
| * FORCE_DISABLE Regulator forcibly shut down by software. |
| * VOLTAGE_CHANGE Regulator voltage changed. |
| * DISABLE Regulator was disabled. |
| * |
| * NOTE: These events can be OR'ed together when passed into handler. |
| */ |
| |
| #define REGULATOR_EVENT_UNDER_VOLTAGE 0x01 |
| #define REGULATOR_EVENT_OVER_CURRENT 0x02 |
| #define REGULATOR_EVENT_REGULATION_OUT 0x04 |
| #define REGULATOR_EVENT_FAIL 0x08 |
| #define REGULATOR_EVENT_OVER_TEMP 0x10 |
| #define REGULATOR_EVENT_FORCE_DISABLE 0x20 |
| #define REGULATOR_EVENT_VOLTAGE_CHANGE 0x40 |
| #define REGULATOR_EVENT_DISABLE 0x80 |
| |
| struct regulator; |
| |
| /** |
| * struct regulator_bulk_data - Data used for bulk regulator operations. |
| * |
| * @supply: The name of the supply. Initialised by the user before |
| * using the bulk regulator APIs. |
| * @consumer: The regulator consumer for the supply. This will be managed |
| * by the bulk API. |
| * |
| * The regulator APIs provide a series of regulator_bulk_() API calls as |
| * a convenience to consumers which require multiple supplies. This |
| * structure is used to manage data for these calls. |
| */ |
| struct regulator_bulk_data { |
| const char *supply; |
| struct regulator *consumer; |
| |
| /* private: Internal use */ |
| int ret; |
| }; |
| |
| #if defined(CONFIG_REGULATOR) |
| |
| /* regulator get and put */ |
| struct regulator *__must_check regulator_get(struct device *dev, |
| const char *id); |
| struct regulator *__must_check devm_regulator_get(struct device *dev, |
| const char *id); |
| struct regulator *__must_check regulator_get_exclusive(struct device *dev, |
| const char *id); |
| struct regulator *__must_check devm_regulator_get_exclusive(struct device *dev, |
| const char *id); |
| struct regulator *__must_check regulator_get_optional(struct device *dev, |
| const char *id); |
| struct regulator *__must_check devm_regulator_get_optional(struct device *dev, |
| const char *id); |
| void regulator_put(struct regulator *regulator); |
| void devm_regulator_put(struct regulator *regulator); |
| |
| int regulator_register_supply_alias(struct device *dev, const char *id, |
| struct device *alias_dev, |
| const char *alias_id); |
| void regulator_unregister_supply_alias(struct device *dev, const char *id); |
| |
| int regulator_bulk_register_supply_alias(struct device *dev, |
| const char *const *id, |
| struct device *alias_dev, |
| const char *const *alias_id, |
| int num_id); |
| void regulator_bulk_unregister_supply_alias(struct device *dev, |
| const char * const *id, int num_id); |
| |
| int devm_regulator_register_supply_alias(struct device *dev, const char *id, |
| struct device *alias_dev, |
| const char *alias_id); |
| void devm_regulator_unregister_supply_alias(struct device *dev, |
| const char *id); |
| |
| int devm_regulator_bulk_register_supply_alias(struct device *dev, |
| const char *const *id, |
| struct device *alias_dev, |
| const char *const *alias_id, |
| int num_id); |
| void devm_regulator_bulk_unregister_supply_alias(struct device *dev, |
| const char *const *id, |
| int num_id); |
| |
| /* regulator output control and status */ |
| int __must_check regulator_enable(struct regulator *regulator); |
| int regulator_disable(struct regulator *regulator); |
| int regulator_force_disable(struct regulator *regulator); |
| int regulator_is_enabled(struct regulator *regulator); |
| int regulator_disable_deferred(struct regulator *regulator, int ms); |
| |
| int __must_check regulator_bulk_get(struct device *dev, int num_consumers, |
| struct regulator_bulk_data *consumers); |
| int __must_check devm_regulator_bulk_get(struct device *dev, int num_consumers, |
| struct regulator_bulk_data *consumers); |
| int __must_check regulator_bulk_enable(int num_consumers, |
| struct regulator_bulk_data *consumers); |
| int regulator_bulk_disable(int num_consumers, |
| struct regulator_bulk_data *consumers); |
| int regulator_bulk_force_disable(int num_consumers, |
| struct regulator_bulk_data *consumers); |
| void regulator_bulk_free(int num_consumers, |
| struct regulator_bulk_data *consumers); |
| |
| int regulator_can_change_voltage(struct regulator *regulator); |
| int regulator_count_voltages(struct regulator *regulator); |
| int regulator_list_voltage(struct regulator *regulator, unsigned selector); |
| int regulator_is_supported_voltage(struct regulator *regulator, |
| int min_uV, int max_uV); |
| unsigned int regulator_get_linear_step(struct regulator *regulator); |
| int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV); |
| int regulator_set_voltage_time(struct regulator *regulator, |
| int old_uV, int new_uV); |
| int regulator_get_voltage(struct regulator *regulator); |
| int regulator_sync_voltage(struct regulator *regulator); |
| int regulator_set_current_limit(struct regulator *regulator, |
| int min_uA, int max_uA); |
| int regulator_get_current_limit(struct regulator *regulator); |
| |
| int regulator_set_mode(struct regulator *regulator, unsigned int mode); |
| unsigned int regulator_get_mode(struct regulator *regulator); |
| int regulator_set_optimum_mode(struct regulator *regulator, int load_uA); |
| |
| int regulator_allow_bypass(struct regulator *regulator, bool allow); |
| |
| /* regulator notifier block */ |
| int regulator_register_notifier(struct regulator *regulator, |
| struct notifier_block *nb); |
| int regulator_unregister_notifier(struct regulator *regulator, |
| struct notifier_block *nb); |
| |
| /* driver data - core doesn't touch */ |
| void *regulator_get_drvdata(struct regulator *regulator); |
| void regulator_set_drvdata(struct regulator *regulator, void *data); |
| |
| #else |
| |
| /* |
| * Make sure client drivers will still build on systems with no software |
| * controllable voltage or current regulators. |
| */ |
| static inline struct regulator *__must_check regulator_get(struct device *dev, |
| const char *id) |
| { |
| /* Nothing except the stubbed out regulator API should be |
| * looking at the value except to check if it is an error |
| * value. Drivers are free to handle NULL specifically by |
| * skipping all regulator API calls, but they don't have to. |
| * Drivers which don't, should make sure they properly handle |
| * corner cases of the API, such as regulator_get_voltage() |
| * returning 0. |
| */ |
| return NULL; |
| } |
| |
| static inline struct regulator *__must_check |
| devm_regulator_get(struct device *dev, const char *id) |
| { |
| return NULL; |
| } |
| |
| static inline struct regulator *__must_check |
| regulator_get_exclusive(struct device *dev, const char *id) |
| { |
| return NULL; |
| } |
| |
| static inline struct regulator *__must_check |
| regulator_get_optional(struct device *dev, const char *id) |
| { |
| return ERR_PTR(-ENODEV); |
| } |
| |
| |
| static inline struct regulator *__must_check |
| devm_regulator_get_optional(struct device *dev, const char *id) |
| { |
| return ERR_PTR(-ENODEV); |
| } |
| |
| static inline void regulator_put(struct regulator *regulator) |
| { |
| } |
| |
| static inline void devm_regulator_put(struct regulator *regulator) |
| { |
| } |
| |
| static inline int regulator_register_supply_alias(struct device *dev, |
| const char *id, |
| struct device *alias_dev, |
| const char *alias_id) |
| { |
| return 0; |
| } |
| |
| static inline void regulator_unregister_supply_alias(struct device *dev, |
| const char *id) |
| { |
| } |
| |
| static inline int regulator_bulk_register_supply_alias(struct device *dev, |
| const char *const *id, |
| struct device *alias_dev, |
| const char * const *alias_id, |
| int num_id) |
| { |
| return 0; |
| } |
| |
| static inline void regulator_bulk_unregister_supply_alias(struct device *dev, |
| const char * const *id, |
| int num_id) |
| { |
| } |
| |
| static inline int devm_regulator_register_supply_alias(struct device *dev, |
| const char *id, |
| struct device *alias_dev, |
| const char *alias_id) |
| { |
| return 0; |
| } |
| |
| static inline void devm_regulator_unregister_supply_alias(struct device *dev, |
| const char *id) |
| { |
| } |
| |
| static inline int devm_regulator_bulk_register_supply_alias(struct device *dev, |
| const char *const *id, |
| struct device *alias_dev, |
| const char *const *alias_id, |
| int num_id) |
| { |
| return 0; |
| } |
| |
| static inline void devm_regulator_bulk_unregister_supply_alias( |
| struct device *dev, const char *const *id, int num_id) |
| { |
| } |
| |
| static inline int regulator_enable(struct regulator *regulator) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_disable(struct regulator *regulator) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_force_disable(struct regulator *regulator) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_disable_deferred(struct regulator *regulator, |
| int ms) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_is_enabled(struct regulator *regulator) |
| { |
| return 1; |
| } |
| |
| static inline int regulator_bulk_get(struct device *dev, |
| int num_consumers, |
| struct regulator_bulk_data *consumers) |
| { |
| return 0; |
| } |
| |
| static inline int devm_regulator_bulk_get(struct device *dev, int num_consumers, |
| struct regulator_bulk_data *consumers) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_bulk_enable(int num_consumers, |
| struct regulator_bulk_data *consumers) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_bulk_disable(int num_consumers, |
| struct regulator_bulk_data *consumers) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_bulk_force_disable(int num_consumers, |
| struct regulator_bulk_data *consumers) |
| { |
| return 0; |
| } |
| |
| static inline void regulator_bulk_free(int num_consumers, |
| struct regulator_bulk_data *consumers) |
| { |
| } |
| |
| static inline int regulator_can_change_voltage(struct regulator *regulator) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_set_voltage(struct regulator *regulator, |
| int min_uV, int max_uV) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_set_voltage_time(struct regulator *regulator, |
| int old_uV, int new_uV) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_get_voltage(struct regulator *regulator) |
| { |
| return -EINVAL; |
| } |
| |
| static inline int regulator_is_supported_voltage(struct regulator *regulator, |
| int min_uV, int max_uV) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_set_current_limit(struct regulator *regulator, |
| int min_uA, int max_uA) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_get_current_limit(struct regulator *regulator) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_set_mode(struct regulator *regulator, |
| unsigned int mode) |
| { |
| return 0; |
| } |
| |
| static inline unsigned int regulator_get_mode(struct regulator *regulator) |
| { |
| return REGULATOR_MODE_NORMAL; |
| } |
| |
| static inline int regulator_set_optimum_mode(struct regulator *regulator, |
| int load_uA) |
| { |
| return REGULATOR_MODE_NORMAL; |
| } |
| |
| static inline int regulator_allow_bypass(struct regulator *regulator, |
| bool allow) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_register_notifier(struct regulator *regulator, |
| struct notifier_block *nb) |
| { |
| return 0; |
| } |
| |
| static inline int regulator_unregister_notifier(struct regulator *regulator, |
| struct notifier_block *nb) |
| { |
| return 0; |
| } |
| |
| static inline void *regulator_get_drvdata(struct regulator *regulator) |
| { |
| return NULL; |
| } |
| |
| static inline void regulator_set_drvdata(struct regulator *regulator, |
| void *data) |
| { |
| } |
| |
| static inline int regulator_count_voltages(struct regulator *regulator) |
| { |
| return 0; |
| } |
| #endif |
| |
| static inline int regulator_set_voltage_tol(struct regulator *regulator, |
| int new_uV, int tol_uV) |
| { |
| if (regulator_set_voltage(regulator, new_uV, new_uV + tol_uV) == 0) |
| return 0; |
| else |
| return regulator_set_voltage(regulator, |
| new_uV - tol_uV, new_uV + tol_uV); |
| } |
| |
| static inline int regulator_is_supported_voltage_tol(struct regulator *regulator, |
| int target_uV, int tol_uV) |
| { |
| return regulator_is_supported_voltage(regulator, |
| target_uV - tol_uV, |
| target_uV + tol_uV); |
| } |
| |
| #endif |
