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_
38 #include <linux/err.h>
41 struct notifier_block
;
45 * Regulator operating modes.
47 * Regulators can run in a variety of different operating modes depending on
48 * output load. This allows further system power savings by selecting the
49 * best (and most efficient) regulator mode for a desired load.
51 * Most drivers will only care about NORMAL. The modes below are generic and
52 * will probably not match the naming convention of your regulator data sheet
53 * but should match the use cases in the datasheet.
55 * In order of power efficiency (least efficient at top).
58 * FAST Regulator can handle fast changes in it's load.
59 * e.g. useful in CPU voltage & frequency scaling where
60 * load can quickly increase with CPU frequency increases.
62 * NORMAL Normal regulator power supply mode. Most drivers will
65 * IDLE Regulator runs in a more efficient mode for light
66 * loads. Can be used for devices that have a low power
67 * requirement during periods of inactivity. This mode
68 * may be more noisy than NORMAL and may not be able
69 * to handle fast load switching.
71 * STANDBY Regulator runs in the most efficient mode for very
72 * light loads. Can be used by devices when they are
73 * in a sleep/standby state. This mode is likely to be
74 * the most noisy and may not be able to handle fast load
77 * NOTE: Most regulators will only support a subset of these modes. Some
78 * will only just support NORMAL.
80 * These modes can be OR'ed together to make up a mask of valid register modes.
83 #define REGULATOR_MODE_FAST 0x1
84 #define REGULATOR_MODE_NORMAL 0x2
85 #define REGULATOR_MODE_IDLE 0x4
86 #define REGULATOR_MODE_STANDBY 0x8
89 * Regulator notifier events.
91 * UNDER_VOLTAGE Regulator output is under voltage.
92 * OVER_CURRENT Regulator output current is too high.
93 * REGULATION_OUT Regulator output is out of regulation.
94 * FAIL Regulator output has failed.
95 * OVER_TEMP Regulator over temp.
96 * FORCE_DISABLE Regulator forcibly shut down by software.
97 * VOLTAGE_CHANGE Regulator voltage changed.
98 * Data passed is old voltage cast to (void *).
99 * DISABLE Regulator was disabled.
100 * PRE_VOLTAGE_CHANGE Regulator is about to have voltage changed.
101 * Data passed is "struct pre_voltage_change_data"
102 * ABORT_VOLTAGE_CHANGE Regulator voltage change failed for some reason.
103 * Data passed is old voltage cast to (void *).
104 * PRE_DISABLE Regulator is about to be disabled
105 * ABORT_DISABLE Regulator disable failed for some reason
107 * NOTE: These events can be OR'ed together when passed into handler.
110 #define REGULATOR_EVENT_UNDER_VOLTAGE 0x01
111 #define REGULATOR_EVENT_OVER_CURRENT 0x02
112 #define REGULATOR_EVENT_REGULATION_OUT 0x04
113 #define REGULATOR_EVENT_FAIL 0x08
114 #define REGULATOR_EVENT_OVER_TEMP 0x10
115 #define REGULATOR_EVENT_FORCE_DISABLE 0x20
116 #define REGULATOR_EVENT_VOLTAGE_CHANGE 0x40
117 #define REGULATOR_EVENT_DISABLE 0x80
118 #define REGULATOR_EVENT_PRE_VOLTAGE_CHANGE 0x100
119 #define REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE 0x200
120 #define REGULATOR_EVENT_PRE_DISABLE 0x400
121 #define REGULATOR_EVENT_ABORT_DISABLE 0x800
124 * struct pre_voltage_change_data - Data sent with PRE_VOLTAGE_CHANGE event
126 * @old_uV: Current voltage before change.
127 * @min_uV: Min voltage we'll change to.
128 * @max_uV: Max voltage we'll change to.
130 struct pre_voltage_change_data
{
131 unsigned long old_uV
;
132 unsigned long min_uV
;
133 unsigned long max_uV
;
139 * struct regulator_bulk_data - Data used for bulk regulator operations.
141 * @supply: The name of the supply. Initialised by the user before
142 * using the bulk regulator APIs.
143 * @consumer: The regulator consumer for the supply. This will be managed
146 * The regulator APIs provide a series of regulator_bulk_() API calls as
147 * a convenience to consumers which require multiple supplies. This
148 * structure is used to manage data for these calls.
150 struct regulator_bulk_data
{
152 struct regulator
*consumer
;
154 /* private: Internal use */
158 #if defined(CONFIG_REGULATOR)
160 /* regulator get and put */
161 struct regulator
*__must_check
regulator_get(struct device
*dev
,
163 struct regulator
*__must_check
devm_regulator_get(struct device
*dev
,
165 struct regulator
*__must_check
regulator_get_exclusive(struct device
*dev
,
167 struct regulator
*__must_check
devm_regulator_get_exclusive(struct device
*dev
,
169 struct regulator
*__must_check
regulator_get_optional(struct device
*dev
,
171 struct regulator
*__must_check
devm_regulator_get_optional(struct device
*dev
,
173 void regulator_put(struct regulator
*regulator
);
174 void devm_regulator_put(struct regulator
*regulator
);
176 int regulator_register_supply_alias(struct device
*dev
, const char *id
,
177 struct device
*alias_dev
,
178 const char *alias_id
);
179 void regulator_unregister_supply_alias(struct device
*dev
, const char *id
);
181 int regulator_bulk_register_supply_alias(struct device
*dev
,
182 const char *const *id
,
183 struct device
*alias_dev
,
184 const char *const *alias_id
,
186 void regulator_bulk_unregister_supply_alias(struct device
*dev
,
187 const char * const *id
, int num_id
);
189 int devm_regulator_register_supply_alias(struct device
*dev
, const char *id
,
190 struct device
*alias_dev
,
191 const char *alias_id
);
192 void devm_regulator_unregister_supply_alias(struct device
*dev
,
195 int devm_regulator_bulk_register_supply_alias(struct device
*dev
,
196 const char *const *id
,
197 struct device
*alias_dev
,
198 const char *const *alias_id
,
200 void devm_regulator_bulk_unregister_supply_alias(struct device
*dev
,
201 const char *const *id
,
204 /* regulator output control and status */
205 int __must_check
regulator_enable(struct regulator
*regulator
);
206 int regulator_disable(struct regulator
*regulator
);
207 int regulator_force_disable(struct regulator
*regulator
);
208 int regulator_is_enabled(struct regulator
*regulator
);
209 int regulator_disable_deferred(struct regulator
*regulator
, int ms
);
211 int __must_check
regulator_bulk_get(struct device
*dev
, int num_consumers
,
212 struct regulator_bulk_data
*consumers
);
213 int __must_check
devm_regulator_bulk_get(struct device
*dev
, int num_consumers
,
214 struct regulator_bulk_data
*consumers
);
215 int __must_check
regulator_bulk_enable(int num_consumers
,
216 struct regulator_bulk_data
*consumers
);
217 int regulator_bulk_disable(int num_consumers
,
218 struct regulator_bulk_data
*consumers
);
219 int regulator_bulk_force_disable(int num_consumers
,
220 struct regulator_bulk_data
*consumers
);
221 void regulator_bulk_free(int num_consumers
,
222 struct regulator_bulk_data
*consumers
);
224 int regulator_can_change_voltage(struct regulator
*regulator
);
225 int regulator_count_voltages(struct regulator
*regulator
);
226 int regulator_list_voltage(struct regulator
*regulator
, unsigned selector
);
227 int regulator_is_supported_voltage(struct regulator
*regulator
,
228 int min_uV
, int max_uV
);
229 unsigned int regulator_get_linear_step(struct regulator
*regulator
);
230 int regulator_set_voltage(struct regulator
*regulator
, int min_uV
, int max_uV
);
231 int regulator_set_voltage_time(struct regulator
*regulator
,
232 int old_uV
, int new_uV
);
233 int regulator_get_voltage(struct regulator
*regulator
);
234 int regulator_sync_voltage(struct regulator
*regulator
);
235 int regulator_set_current_limit(struct regulator
*regulator
,
236 int min_uA
, int max_uA
);
237 int regulator_get_current_limit(struct regulator
*regulator
);
239 int regulator_set_mode(struct regulator
*regulator
, unsigned int mode
);
240 unsigned int regulator_get_mode(struct regulator
*regulator
);
241 int regulator_set_load(struct regulator
*regulator
, int load_uA
);
243 int regulator_allow_bypass(struct regulator
*regulator
, bool allow
);
245 struct regmap
*regulator_get_regmap(struct regulator
*regulator
);
246 int regulator_get_hardware_vsel_register(struct regulator
*regulator
,
248 unsigned *vsel_mask
);
249 int regulator_list_hardware_vsel(struct regulator
*regulator
,
252 /* regulator notifier block */
253 int regulator_register_notifier(struct regulator
*regulator
,
254 struct notifier_block
*nb
);
255 int devm_regulator_register_notifier(struct regulator
*regulator
,
256 struct notifier_block
*nb
);
257 int regulator_unregister_notifier(struct regulator
*regulator
,
258 struct notifier_block
*nb
);
259 void devm_regulator_unregister_notifier(struct regulator
*regulator
,
260 struct notifier_block
*nb
);
262 /* driver data - core doesn't touch */
263 void *regulator_get_drvdata(struct regulator
*regulator
);
264 void regulator_set_drvdata(struct regulator
*regulator
, void *data
);
269 * Make sure client drivers will still build on systems with no software
270 * controllable voltage or current regulators.
272 static inline struct regulator
*__must_check
regulator_get(struct device
*dev
,
275 /* Nothing except the stubbed out regulator API should be
276 * looking at the value except to check if it is an error
277 * value. Drivers are free to handle NULL specifically by
278 * skipping all regulator API calls, but they don't have to.
279 * Drivers which don't, should make sure they properly handle
280 * corner cases of the API, such as regulator_get_voltage()
286 static inline struct regulator
*__must_check
287 devm_regulator_get(struct device
*dev
, const char *id
)
292 static inline struct regulator
*__must_check
293 regulator_get_exclusive(struct device
*dev
, const char *id
)
295 return ERR_PTR(-ENODEV
);
298 static inline struct regulator
*__must_check
299 regulator_get_optional(struct device
*dev
, const char *id
)
301 return ERR_PTR(-ENODEV
);
305 static inline struct regulator
*__must_check
306 devm_regulator_get_optional(struct device
*dev
, const char *id
)
308 return ERR_PTR(-ENODEV
);
311 static inline void regulator_put(struct regulator
*regulator
)
315 static inline void devm_regulator_put(struct regulator
*regulator
)
319 static inline int regulator_register_supply_alias(struct device
*dev
,
321 struct device
*alias_dev
,
322 const char *alias_id
)
327 static inline void regulator_unregister_supply_alias(struct device
*dev
,
332 static inline int regulator_bulk_register_supply_alias(struct device
*dev
,
333 const char *const *id
,
334 struct device
*alias_dev
,
335 const char * const *alias_id
,
341 static inline void regulator_bulk_unregister_supply_alias(struct device
*dev
,
342 const char * const *id
,
347 static inline int devm_regulator_register_supply_alias(struct device
*dev
,
349 struct device
*alias_dev
,
350 const char *alias_id
)
355 static inline void devm_regulator_unregister_supply_alias(struct device
*dev
,
360 static inline int devm_regulator_bulk_register_supply_alias(struct device
*dev
,
361 const char *const *id
,
362 struct device
*alias_dev
,
363 const char *const *alias_id
,
369 static inline void devm_regulator_bulk_unregister_supply_alias(
370 struct device
*dev
, const char *const *id
, int num_id
)
374 static inline int regulator_enable(struct regulator
*regulator
)
379 static inline int regulator_disable(struct regulator
*regulator
)
384 static inline int regulator_force_disable(struct regulator
*regulator
)
389 static inline int regulator_disable_deferred(struct regulator
*regulator
,
395 static inline int regulator_is_enabled(struct regulator
*regulator
)
400 static inline int regulator_bulk_get(struct device
*dev
,
402 struct regulator_bulk_data
*consumers
)
407 static inline int devm_regulator_bulk_get(struct device
*dev
, int num_consumers
,
408 struct regulator_bulk_data
*consumers
)
413 static inline int regulator_bulk_enable(int num_consumers
,
414 struct regulator_bulk_data
*consumers
)
419 static inline int regulator_bulk_disable(int num_consumers
,
420 struct regulator_bulk_data
*consumers
)
425 static inline int regulator_bulk_force_disable(int num_consumers
,
426 struct regulator_bulk_data
*consumers
)
431 static inline void regulator_bulk_free(int num_consumers
,
432 struct regulator_bulk_data
*consumers
)
436 static inline int regulator_can_change_voltage(struct regulator
*regulator
)
441 static inline int regulator_set_voltage(struct regulator
*regulator
,
442 int min_uV
, int max_uV
)
447 static inline int regulator_set_voltage_time(struct regulator
*regulator
,
448 int old_uV
, int new_uV
)
453 static inline int regulator_get_voltage(struct regulator
*regulator
)
458 static inline int regulator_is_supported_voltage(struct regulator
*regulator
,
459 int min_uV
, int max_uV
)
464 static inline int regulator_set_current_limit(struct regulator
*regulator
,
465 int min_uA
, int max_uA
)
470 static inline int regulator_get_current_limit(struct regulator
*regulator
)
475 static inline int regulator_set_mode(struct regulator
*regulator
,
481 static inline unsigned int regulator_get_mode(struct regulator
*regulator
)
483 return REGULATOR_MODE_NORMAL
;
486 static inline int regulator_set_load(struct regulator
*regulator
, int load_uA
)
488 return REGULATOR_MODE_NORMAL
;
491 static inline int regulator_allow_bypass(struct regulator
*regulator
,
497 static inline struct regmap
*regulator_get_regmap(struct regulator
*regulator
)
499 return ERR_PTR(-EOPNOTSUPP
);
502 static inline int regulator_get_hardware_vsel_register(struct regulator
*regulator
,
509 static inline int regulator_list_hardware_vsel(struct regulator
*regulator
,
515 static inline int regulator_register_notifier(struct regulator
*regulator
,
516 struct notifier_block
*nb
)
521 static inline int devm_regulator_register_notifier(struct regulator
*regulator
,
522 struct notifier_block
*nb
)
527 static inline int regulator_unregister_notifier(struct regulator
*regulator
,
528 struct notifier_block
*nb
)
533 static inline int devm_regulator_unregister_notifier(struct regulator
*regulator
,
534 struct notifier_block
*nb
)
539 static inline void *regulator_get_drvdata(struct regulator
*regulator
)
544 static inline void regulator_set_drvdata(struct regulator
*regulator
,
549 static inline int regulator_count_voltages(struct regulator
*regulator
)
555 static inline int regulator_set_voltage_tol(struct regulator
*regulator
,
556 int new_uV
, int tol_uV
)
558 if (regulator_set_voltage(regulator
, new_uV
, new_uV
+ tol_uV
) == 0)
561 return regulator_set_voltage(regulator
,
562 new_uV
- tol_uV
, new_uV
+ tol_uV
);
565 static inline int regulator_is_supported_voltage_tol(struct regulator
*regulator
,
566 int target_uV
, int tol_uV
)
568 return regulator_is_supported_voltage(regulator
,
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