2 * consumer.h -- SoC Regulator consumer support.
4 * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
6 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * Regulator Consumer Interface.
14 * A Power Management Regulator framework for SoC based devices.
16 * o Voltage and current level control.
17 * o Operating mode control.
19 * o sysfs entries for showing client devices and status
21 * EXPERIMENTAL FEATURES:
22 * Dynamic Regulator operating Mode Switching (DRMS) - allows regulators
23 * to use most efficient operating mode depending upon voltage and load and
24 * is transparent to client drivers.
26 * e.g. Devices x,y,z share regulator r. Device x and y draw 20mA each during
27 * IO and 1mA at idle. Device z draws 100mA when under load and 5mA when
28 * idling. Regulator r has > 90% efficiency in NORMAL mode at loads > 100mA
29 * but this drops rapidly to 60% when below 100mA. Regulator r has > 90%
30 * efficiency in IDLE mode at loads < 10mA. Thus regulator r will operate
31 * in normal mode for loads > 10mA and in IDLE mode for load <= 10mA.
35 #ifndef __LINUX_REGULATOR_CONSUMER_H_
36 #define __LINUX_REGULATOR_CONSUMER_H_
39 struct notifier_block;
43 * Regulator operating modes.
45 * Regulators can run in a variety of different operating modes depending on
46 * output load. This allows further system power savings by selecting the
47 * best (and most efficient) regulator mode for a desired load.
49 * Most drivers will only care about NORMAL. The modes below are generic and
50 * will probably not match the naming convention of your regulator data sheet
51 * but should match the use cases in the datasheet.
53 * In order of power efficiency (least efficient at top).
56 * FAST Regulator can handle fast changes in it's load.
57 * e.g. useful in CPU voltage & frequency scaling where
58 * load can quickly increase with CPU frequency increases.
60 * NORMAL Normal regulator power supply mode. Most drivers will
63 * IDLE Regulator runs in a more efficient mode for light
64 * loads. Can be used for devices that have a low power
65 * requirement during periods of inactivity. This mode
66 * may be more noisy than NORMAL and may not be able
67 * to handle fast load switching.
69 * STANDBY Regulator runs in the most efficient mode for very
70 * light loads. Can be used by devices when they are
71 * in a sleep/standby state. This mode is likely to be
72 * the most noisy and may not be able to handle fast load
75 * NOTE: Most regulators will only support a subset of these modes. Some
76 * will only just support NORMAL.
78 * These modes can be OR'ed together to make up a mask of valid register modes.
81 #define REGULATOR_MODE_FAST 0x1
82 #define REGULATOR_MODE_NORMAL 0x2
83 #define REGULATOR_MODE_IDLE 0x4
84 #define REGULATOR_MODE_STANDBY 0x8
87 * Regulator notifier events.
89 * UNDER_VOLTAGE Regulator output is under voltage.
90 * OVER_CURRENT Regulator output current is too high.
91 * REGULATION_OUT Regulator output is out of regulation.
92 * FAIL Regulator output has failed.
93 * OVER_TEMP Regulator over temp.
94 * FORCE_DISABLE Regulator forcibly shut down by software.
95 * VOLTAGE_CHANGE Regulator voltage changed.
96 * DISABLE Regulator was disabled.
98 * NOTE: These events can be OR'ed together when passed into handler.
101 #define REGULATOR_EVENT_UNDER_VOLTAGE 0x01
102 #define REGULATOR_EVENT_OVER_CURRENT 0x02
103 #define REGULATOR_EVENT_REGULATION_OUT 0x04
104 #define REGULATOR_EVENT_FAIL 0x08
105 #define REGULATOR_EVENT_OVER_TEMP 0x10
106 #define REGULATOR_EVENT_FORCE_DISABLE 0x20
107 #define REGULATOR_EVENT_VOLTAGE_CHANGE 0x40
108 #define REGULATOR_EVENT_DISABLE 0x80
113 * struct regulator_bulk_data - Data used for bulk regulator operations.
115 * @supply: The name of the supply. Initialised by the user before
116 * using the bulk regulator APIs.
117 * @consumer: The regulator consumer for the supply. This will be managed
120 * The regulator APIs provide a series of regulator_bulk_() API calls as
121 * a convenience to consumers which require multiple supplies. This
122 * structure is used to manage data for these calls.
124 struct regulator_bulk_data {
126 struct regulator *consumer;
128 /* private: Internal use */
132 #if defined(CONFIG_REGULATOR)
134 /* regulator get and put */
135 struct regulator *__must_check regulator_get(struct device *dev,
137 struct regulator *__must_check devm_regulator_get(struct device *dev,
139 struct regulator *__must_check regulator_get_exclusive(struct device *dev,
141 struct regulator *__must_check devm_regulator_get_exclusive(struct device *dev,
143 struct regulator *__must_check regulator_get_optional(struct device *dev,
145 struct regulator *__must_check devm_regulator_get_optional(struct device *dev,
147 void regulator_put(struct regulator *regulator);
148 void devm_regulator_put(struct regulator *regulator);
150 int regulator_register_supply_alias(struct device *dev, const char *id,
151 struct device *alias_dev,
152 const char *alias_id);
153 void regulator_unregister_supply_alias(struct device *dev, const char *id);
155 int regulator_bulk_register_supply_alias(struct device *dev,
156 const char *const *id,
157 struct device *alias_dev,
158 const char *const *alias_id,
160 void regulator_bulk_unregister_supply_alias(struct device *dev,
161 const char * const *id, int num_id);
163 int devm_regulator_register_supply_alias(struct device *dev, const char *id,
164 struct device *alias_dev,
165 const char *alias_id);
166 void devm_regulator_unregister_supply_alias(struct device *dev,
169 int devm_regulator_bulk_register_supply_alias(struct device *dev,
170 const char *const *id,
171 struct device *alias_dev,
172 const char *const *alias_id,
174 void devm_regulator_bulk_unregister_supply_alias(struct device *dev,
175 const char *const *id,
178 /* regulator output control and status */
179 int __must_check regulator_enable(struct regulator *regulator);
180 int regulator_disable(struct regulator *regulator);
181 int regulator_force_disable(struct regulator *regulator);
182 int regulator_is_enabled(struct regulator *regulator);
183 int regulator_disable_deferred(struct regulator *regulator, int ms);
185 int __must_check regulator_bulk_get(struct device *dev, int num_consumers,
186 struct regulator_bulk_data *consumers);
187 int __must_check devm_regulator_bulk_get(struct device *dev, int num_consumers,
188 struct regulator_bulk_data *consumers);
189 int __must_check regulator_bulk_enable(int num_consumers,
190 struct regulator_bulk_data *consumers);
191 int regulator_bulk_disable(int num_consumers,
192 struct regulator_bulk_data *consumers);
193 int regulator_bulk_force_disable(int num_consumers,
194 struct regulator_bulk_data *consumers);
195 void regulator_bulk_free(int num_consumers,
196 struct regulator_bulk_data *consumers);
198 int regulator_can_change_voltage(struct regulator *regulator);
199 int regulator_count_voltages(struct regulator *regulator);
200 int regulator_list_voltage(struct regulator *regulator, unsigned selector);
201 int regulator_is_supported_voltage(struct regulator *regulator,
202 int min_uV, int max_uV);
203 unsigned int regulator_get_linear_step(struct regulator *regulator);
204 int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV);
205 int regulator_set_voltage_time(struct regulator *regulator,
206 int old_uV, int new_uV);
207 int regulator_get_voltage(struct regulator *regulator);
208 int regulator_sync_voltage(struct regulator *regulator);
209 int regulator_set_current_limit(struct regulator *regulator,
210 int min_uA, int max_uA);
211 int regulator_get_current_limit(struct regulator *regulator);
213 int regulator_set_mode(struct regulator *regulator, unsigned int mode);
214 unsigned int regulator_get_mode(struct regulator *regulator);
215 int regulator_set_optimum_mode(struct regulator *regulator, int load_uA);
217 int regulator_allow_bypass(struct regulator *regulator, bool allow);
219 struct regmap *regulator_get_regmap(struct regulator *regulator);
220 int regulator_get_hardware_vsel_register(struct regulator *regulator,
222 unsigned *vsel_mask);
223 int regulator_list_hardware_vsel(struct regulator *regulator,
226 /* regulator notifier block */
227 int regulator_register_notifier(struct regulator *regulator,
228 struct notifier_block *nb);
229 int regulator_unregister_notifier(struct regulator *regulator,
230 struct notifier_block *nb);
232 /* driver data - core doesn't touch */
233 void *regulator_get_drvdata(struct regulator *regulator);
234 void regulator_set_drvdata(struct regulator *regulator, void *data);
239 * Make sure client drivers will still build on systems with no software
240 * controllable voltage or current regulators.
242 static inline struct regulator *__must_check regulator_get(struct device *dev,
245 /* Nothing except the stubbed out regulator API should be
246 * looking at the value except to check if it is an error
247 * value. Drivers are free to handle NULL specifically by
248 * skipping all regulator API calls, but they don't have to.
249 * Drivers which don't, should make sure they properly handle
250 * corner cases of the API, such as regulator_get_voltage()
256 static inline struct regulator *__must_check
257 devm_regulator_get(struct device *dev, const char *id)
262 static inline struct regulator *__must_check
263 regulator_get_exclusive(struct device *dev, const char *id)
268 static inline struct regulator *__must_check
269 regulator_get_optional(struct device *dev, const char *id)
271 return ERR_PTR(-ENODEV);
275 static inline struct regulator *__must_check
276 devm_regulator_get_optional(struct device *dev, const char *id)
278 return ERR_PTR(-ENODEV);
281 static inline void regulator_put(struct regulator *regulator)
285 static inline void devm_regulator_put(struct regulator *regulator)
289 static inline int regulator_register_supply_alias(struct device *dev,
291 struct device *alias_dev,
292 const char *alias_id)
297 static inline void regulator_unregister_supply_alias(struct device *dev,
302 static inline int regulator_bulk_register_supply_alias(struct device *dev,
303 const char *const *id,
304 struct device *alias_dev,
305 const char * const *alias_id,
311 static inline void regulator_bulk_unregister_supply_alias(struct device *dev,
312 const char * const *id,
317 static inline int devm_regulator_register_supply_alias(struct device *dev,
319 struct device *alias_dev,
320 const char *alias_id)
325 static inline void devm_regulator_unregister_supply_alias(struct device *dev,
330 static inline int devm_regulator_bulk_register_supply_alias(struct device *dev,
331 const char *const *id,
332 struct device *alias_dev,
333 const char *const *alias_id,
339 static inline void devm_regulator_bulk_unregister_supply_alias(
340 struct device *dev, const char *const *id, int num_id)
344 static inline int regulator_enable(struct regulator *regulator)
349 static inline int regulator_disable(struct regulator *regulator)
354 static inline int regulator_force_disable(struct regulator *regulator)
359 static inline int regulator_disable_deferred(struct regulator *regulator,
365 static inline int regulator_is_enabled(struct regulator *regulator)
370 static inline int regulator_bulk_get(struct device *dev,
372 struct regulator_bulk_data *consumers)
377 static inline int devm_regulator_bulk_get(struct device *dev, int num_consumers,
378 struct regulator_bulk_data *consumers)
383 static inline int regulator_bulk_enable(int num_consumers,
384 struct regulator_bulk_data *consumers)
389 static inline int regulator_bulk_disable(int num_consumers,
390 struct regulator_bulk_data *consumers)
395 static inline int regulator_bulk_force_disable(int num_consumers,
396 struct regulator_bulk_data *consumers)
401 static inline void regulator_bulk_free(int num_consumers,
402 struct regulator_bulk_data *consumers)
406 static inline int regulator_can_change_voltage(struct regulator *regulator)
411 static inline int regulator_set_voltage(struct regulator *regulator,
412 int min_uV, int max_uV)
417 static inline int regulator_set_voltage_time(struct regulator *regulator,
418 int old_uV, int new_uV)
423 static inline int regulator_get_voltage(struct regulator *regulator)
428 static inline int regulator_is_supported_voltage(struct regulator *regulator,
429 int min_uV, int max_uV)
434 static inline int regulator_set_current_limit(struct regulator *regulator,
435 int min_uA, int max_uA)
440 static inline int regulator_get_current_limit(struct regulator *regulator)
445 static inline int regulator_set_mode(struct regulator *regulator,
451 static inline unsigned int regulator_get_mode(struct regulator *regulator)
453 return REGULATOR_MODE_NORMAL;
456 static inline int regulator_set_optimum_mode(struct regulator *regulator,
459 return REGULATOR_MODE_NORMAL;
462 static inline int regulator_allow_bypass(struct regulator *regulator,
468 static inline struct regmap *regulator_get_regmap(struct regulator *regulator)
470 return ERR_PTR(-EOPNOTSUPP);
473 static inline int regulator_get_hardware_vsel_register(struct regulator *regulator,
480 static inline int regulator_list_hardware_vsel(struct regulator *regulator,
486 static inline int regulator_register_notifier(struct regulator *regulator,
487 struct notifier_block *nb)
492 static inline int regulator_unregister_notifier(struct regulator *regulator,
493 struct notifier_block *nb)
498 static inline void *regulator_get_drvdata(struct regulator *regulator)
503 static inline void regulator_set_drvdata(struct regulator *regulator,
508 static inline int regulator_count_voltages(struct regulator *regulator)
514 static inline int regulator_set_voltage_tol(struct regulator *regulator,
515 int new_uV, int tol_uV)
517 if (regulator_set_voltage(regulator, new_uV, new_uV + tol_uV) == 0)
520 return regulator_set_voltage(regulator,
521 new_uV - tol_uV, new_uV + tol_uV);
524 static inline int regulator_is_supported_voltage_tol(struct regulator *regulator,
525 int target_uV, int tol_uV)
527 return regulator_is_supported_voltage(regulator,