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1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * consumer.h -- SoC Regulator consumer support.
4  *
5  * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
6  *
7  * Author: Liam Girdwood <lrg@slimlogic.co.uk>
8  *
9  * Regulator Consumer Interface.
10  *
11  * A Power Management Regulator framework for SoC based devices.
12  * Features:-
13  *   o Voltage and current level control.
14  *   o Operating mode control.
15  *   o Regulator status.
16  *   o sysfs entries for showing client devices and status
17  *
18  * EXPERIMENTAL FEATURES:
19  *   Dynamic Regulator operating Mode Switching (DRMS) - allows regulators
20  *   to use most efficient operating mode depending upon voltage and load and
21  *   is transparent to client drivers.
22  *
23  *   e.g. Devices x,y,z share regulator r. Device x and y draw 20mA each during
24  *   IO and 1mA at idle. Device z draws 100mA when under load and 5mA when
25  *   idling. Regulator r has > 90% efficiency in NORMAL mode at loads > 100mA
26  *   but this drops rapidly to 60% when below 100mA. Regulator r has > 90%
27  *   efficiency in IDLE mode at loads < 10mA. Thus regulator r will operate
28  *   in normal mode for loads > 10mA and in IDLE mode for load <= 10mA.
29  */
30 
31 #ifndef __LINUX_REGULATOR_CONSUMER_H_
32 #define __LINUX_REGULATOR_CONSUMER_H_
33 
34 #include <linux/err.h>
35 #include <linux/suspend.h>
36 
37 struct device;
38 struct notifier_block;
39 struct regmap;
40 struct regulator_dev;
41 
42 /*
43  * Regulator operating modes.
44  *
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.
48  *
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.
52  *
53  * In order of power efficiency (least efficient at top).
54  *
55  *  Mode       Description
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.
59  *
60  *  NORMAL     Normal regulator power supply mode. Most drivers will
61  *             use this mode.
62  *
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.
68  *
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
73  *             switching.
74  *
75  * NOTE: Most regulators will only support a subset of these modes. Some
76  * will only just support NORMAL.
77  *
78  * These modes can be OR'ed together to make up a mask of valid register modes.
79  */
80 
81 #define REGULATOR_MODE_INVALID			0x0
82 #define REGULATOR_MODE_FAST			0x1
83 #define REGULATOR_MODE_NORMAL			0x2
84 #define REGULATOR_MODE_IDLE			0x4
85 #define REGULATOR_MODE_STANDBY			0x8
86 
87 /*
88  * Regulator notifier events.
89  *
90  * UNDER_VOLTAGE  Regulator output is under voltage.
91  * OVER_CURRENT   Regulator output current is too high.
92  * REGULATION_OUT Regulator output is out of regulation.
93  * FAIL           Regulator output has failed.
94  * OVER_TEMP      Regulator over temp.
95  * FORCE_DISABLE  Regulator forcibly shut down by software.
96  * VOLTAGE_CHANGE Regulator voltage changed.
97  *                Data passed is old voltage cast to (void *).
98  * DISABLE        Regulator was disabled.
99  * PRE_VOLTAGE_CHANGE   Regulator is about to have voltage changed.
100  *                      Data passed is "struct pre_voltage_change_data"
101  * ABORT_VOLTAGE_CHANGE Regulator voltage change failed for some reason.
102  *                      Data passed is old voltage cast to (void *).
103  * PRE_DISABLE    Regulator is about to be disabled
104  * ABORT_DISABLE  Regulator disable failed for some reason
105  *
106  * NOTE: These events can be OR'ed together when passed into handler.
107  */
108 
109 #define REGULATOR_EVENT_UNDER_VOLTAGE		0x01
110 #define REGULATOR_EVENT_OVER_CURRENT		0x02
111 #define REGULATOR_EVENT_REGULATION_OUT		0x04
112 #define REGULATOR_EVENT_FAIL			0x08
113 #define REGULATOR_EVENT_OVER_TEMP		0x10
114 #define REGULATOR_EVENT_FORCE_DISABLE		0x20
115 #define REGULATOR_EVENT_VOLTAGE_CHANGE		0x40
116 #define REGULATOR_EVENT_DISABLE			0x80
117 #define REGULATOR_EVENT_PRE_VOLTAGE_CHANGE	0x100
118 #define REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE	0x200
119 #define REGULATOR_EVENT_PRE_DISABLE		0x400
120 #define REGULATOR_EVENT_ABORT_DISABLE		0x800
121 #define REGULATOR_EVENT_ENABLE			0x1000
122 
123 /*
124  * Regulator errors that can be queried using regulator_get_error_flags
125  *
126  * UNDER_VOLTAGE  Regulator output is under voltage.
127  * OVER_CURRENT   Regulator output current is too high.
128  * REGULATION_OUT Regulator output is out of regulation.
129  * FAIL           Regulator output has failed.
130  * OVER_TEMP      Regulator over temp.
131  *
132  * NOTE: These errors can be OR'ed together.
133  */
134 
135 #define REGULATOR_ERROR_UNDER_VOLTAGE		BIT(1)
136 #define REGULATOR_ERROR_OVER_CURRENT		BIT(2)
137 #define REGULATOR_ERROR_REGULATION_OUT		BIT(3)
138 #define REGULATOR_ERROR_FAIL			BIT(4)
139 #define REGULATOR_ERROR_OVER_TEMP		BIT(5)
140 
141 
142 /**
143  * struct pre_voltage_change_data - Data sent with PRE_VOLTAGE_CHANGE event
144  *
145  * @old_uV: Current voltage before change.
146  * @min_uV: Min voltage we'll change to.
147  * @max_uV: Max voltage we'll change to.
148  */
149 struct pre_voltage_change_data {
150 	unsigned long old_uV;
151 	unsigned long min_uV;
152 	unsigned long max_uV;
153 };
154 
155 struct regulator;
156 
157 /**
158  * struct regulator_bulk_data - Data used for bulk regulator operations.
159  *
160  * @supply:   The name of the supply.  Initialised by the user before
161  *            using the bulk regulator APIs.
162  * @consumer: The regulator consumer for the supply.  This will be managed
163  *            by the bulk API.
164  *
165  * The regulator APIs provide a series of regulator_bulk_() API calls as
166  * a convenience to consumers which require multiple supplies.  This
167  * structure is used to manage data for these calls.
168  */
169 struct regulator_bulk_data {
170 	const char *supply;
171 	struct regulator *consumer;
172 
173 	/* private: Internal use */
174 	int ret;
175 };
176 
177 #if defined(CONFIG_REGULATOR)
178 
179 /* regulator get and put */
180 struct regulator *__must_check regulator_get(struct device *dev,
181 					     const char *id);
182 struct regulator *__must_check devm_regulator_get(struct device *dev,
183 					     const char *id);
184 struct regulator *__must_check regulator_get_exclusive(struct device *dev,
185 						       const char *id);
186 struct regulator *__must_check devm_regulator_get_exclusive(struct device *dev,
187 							const char *id);
188 struct regulator *__must_check regulator_get_optional(struct device *dev,
189 						      const char *id);
190 struct regulator *__must_check devm_regulator_get_optional(struct device *dev,
191 							   const char *id);
192 void regulator_put(struct regulator *regulator);
193 void devm_regulator_put(struct regulator *regulator);
194 
195 int regulator_register_supply_alias(struct device *dev, const char *id,
196 				    struct device *alias_dev,
197 				    const char *alias_id);
198 void regulator_unregister_supply_alias(struct device *dev, const char *id);
199 
200 int regulator_bulk_register_supply_alias(struct device *dev,
201 					 const char *const *id,
202 					 struct device *alias_dev,
203 					 const char *const *alias_id,
204 					 int num_id);
205 void regulator_bulk_unregister_supply_alias(struct device *dev,
206 					    const char * const *id, int num_id);
207 
208 int devm_regulator_register_supply_alias(struct device *dev, const char *id,
209 					 struct device *alias_dev,
210 					 const char *alias_id);
211 void devm_regulator_unregister_supply_alias(struct device *dev,
212 					    const char *id);
213 
214 int devm_regulator_bulk_register_supply_alias(struct device *dev,
215 					      const char *const *id,
216 					      struct device *alias_dev,
217 					      const char *const *alias_id,
218 					      int num_id);
219 void devm_regulator_bulk_unregister_supply_alias(struct device *dev,
220 						 const char *const *id,
221 						 int num_id);
222 
223 /* regulator output control and status */
224 int __must_check regulator_enable(struct regulator *regulator);
225 int regulator_disable(struct regulator *regulator);
226 int regulator_force_disable(struct regulator *regulator);
227 int regulator_is_enabled(struct regulator *regulator);
228 int regulator_disable_deferred(struct regulator *regulator, int ms);
229 
230 int __must_check regulator_bulk_get(struct device *dev, int num_consumers,
231 				    struct regulator_bulk_data *consumers);
232 int __must_check devm_regulator_bulk_get(struct device *dev, int num_consumers,
233 					 struct regulator_bulk_data *consumers);
234 int __must_check regulator_bulk_enable(int num_consumers,
235 				       struct regulator_bulk_data *consumers);
236 int regulator_bulk_disable(int num_consumers,
237 			   struct regulator_bulk_data *consumers);
238 int regulator_bulk_force_disable(int num_consumers,
239 			   struct regulator_bulk_data *consumers);
240 void regulator_bulk_free(int num_consumers,
241 			 struct regulator_bulk_data *consumers);
242 
243 int regulator_count_voltages(struct regulator *regulator);
244 int regulator_list_voltage(struct regulator *regulator, unsigned selector);
245 int regulator_is_supported_voltage(struct regulator *regulator,
246 				   int min_uV, int max_uV);
247 unsigned int regulator_get_linear_step(struct regulator *regulator);
248 int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV);
249 int regulator_set_voltage_time(struct regulator *regulator,
250 			       int old_uV, int new_uV);
251 int regulator_get_voltage(struct regulator *regulator);
252 int regulator_sync_voltage(struct regulator *regulator);
253 int regulator_set_current_limit(struct regulator *regulator,
254 			       int min_uA, int max_uA);
255 int regulator_get_current_limit(struct regulator *regulator);
256 
257 int regulator_set_mode(struct regulator *regulator, unsigned int mode);
258 unsigned int regulator_get_mode(struct regulator *regulator);
259 int regulator_get_error_flags(struct regulator *regulator,
260 				unsigned int *flags);
261 int regulator_set_load(struct regulator *regulator, int load_uA);
262 
263 int regulator_allow_bypass(struct regulator *regulator, bool allow);
264 
265 struct regmap *regulator_get_regmap(struct regulator *regulator);
266 int regulator_get_hardware_vsel_register(struct regulator *regulator,
267 					 unsigned *vsel_reg,
268 					 unsigned *vsel_mask);
269 int regulator_list_hardware_vsel(struct regulator *regulator,
270 				 unsigned selector);
271 
272 /* regulator notifier block */
273 int regulator_register_notifier(struct regulator *regulator,
274 			      struct notifier_block *nb);
275 int devm_regulator_register_notifier(struct regulator *regulator,
276 				     struct notifier_block *nb);
277 int regulator_unregister_notifier(struct regulator *regulator,
278 				struct notifier_block *nb);
279 void devm_regulator_unregister_notifier(struct regulator *regulator,
280 					struct notifier_block *nb);
281 
282 /* regulator suspend */
283 int regulator_suspend_enable(struct regulator_dev *rdev,
284 			     suspend_state_t state);
285 int regulator_suspend_disable(struct regulator_dev *rdev,
286 			      suspend_state_t state);
287 int regulator_set_suspend_voltage(struct regulator *regulator, int min_uV,
288 				  int max_uV, suspend_state_t state);
289 
290 /* driver data - core doesn't touch */
291 void *regulator_get_drvdata(struct regulator *regulator);
292 void regulator_set_drvdata(struct regulator *regulator, void *data);
293 
294 /* misc helpers */
295 
296 void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
297 				     const char *const *supply_names,
298 				     unsigned int num_supplies);
299 
300 bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2);
301 
302 #else
303 
304 /*
305  * Make sure client drivers will still build on systems with no software
306  * controllable voltage or current regulators.
307  */
regulator_get(struct device * dev,const char * id)308 static inline struct regulator *__must_check regulator_get(struct device *dev,
309 	const char *id)
310 {
311 	/* Nothing except the stubbed out regulator API should be
312 	 * looking at the value except to check if it is an error
313 	 * value. Drivers are free to handle NULL specifically by
314 	 * skipping all regulator API calls, but they don't have to.
315 	 * Drivers which don't, should make sure they properly handle
316 	 * corner cases of the API, such as regulator_get_voltage()
317 	 * returning 0.
318 	 */
319 	return NULL;
320 }
321 
322 static inline struct regulator *__must_check
devm_regulator_get(struct device * dev,const char * id)323 devm_regulator_get(struct device *dev, const char *id)
324 {
325 	return NULL;
326 }
327 
328 static inline struct regulator *__must_check
regulator_get_exclusive(struct device * dev,const char * id)329 regulator_get_exclusive(struct device *dev, const char *id)
330 {
331 	return ERR_PTR(-ENODEV);
332 }
333 
334 static inline struct regulator *__must_check
regulator_get_optional(struct device * dev,const char * id)335 regulator_get_optional(struct device *dev, const char *id)
336 {
337 	return ERR_PTR(-ENODEV);
338 }
339 
340 
341 static inline struct regulator *__must_check
devm_regulator_get_optional(struct device * dev,const char * id)342 devm_regulator_get_optional(struct device *dev, const char *id)
343 {
344 	return ERR_PTR(-ENODEV);
345 }
346 
regulator_put(struct regulator * regulator)347 static inline void regulator_put(struct regulator *regulator)
348 {
349 }
350 
devm_regulator_put(struct regulator * regulator)351 static inline void devm_regulator_put(struct regulator *regulator)
352 {
353 }
354 
regulator_register_supply_alias(struct device * dev,const char * id,struct device * alias_dev,const char * alias_id)355 static inline int regulator_register_supply_alias(struct device *dev,
356 						  const char *id,
357 						  struct device *alias_dev,
358 						  const char *alias_id)
359 {
360 	return 0;
361 }
362 
regulator_unregister_supply_alias(struct device * dev,const char * id)363 static inline void regulator_unregister_supply_alias(struct device *dev,
364 						    const char *id)
365 {
366 }
367 
regulator_bulk_register_supply_alias(struct device * dev,const char * const * id,struct device * alias_dev,const char * const * alias_id,int num_id)368 static inline int regulator_bulk_register_supply_alias(struct device *dev,
369 						const char *const *id,
370 						struct device *alias_dev,
371 						const char * const *alias_id,
372 						int num_id)
373 {
374 	return 0;
375 }
376 
regulator_bulk_unregister_supply_alias(struct device * dev,const char * const * id,int num_id)377 static inline void regulator_bulk_unregister_supply_alias(struct device *dev,
378 						const char * const *id,
379 						int num_id)
380 {
381 }
382 
devm_regulator_register_supply_alias(struct device * dev,const char * id,struct device * alias_dev,const char * alias_id)383 static inline int devm_regulator_register_supply_alias(struct device *dev,
384 						       const char *id,
385 						       struct device *alias_dev,
386 						       const char *alias_id)
387 {
388 	return 0;
389 }
390 
devm_regulator_unregister_supply_alias(struct device * dev,const char * id)391 static inline void devm_regulator_unregister_supply_alias(struct device *dev,
392 							  const char *id)
393 {
394 }
395 
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)396 static inline int devm_regulator_bulk_register_supply_alias(struct device *dev,
397 						const char *const *id,
398 						struct device *alias_dev,
399 						const char *const *alias_id,
400 						int num_id)
401 {
402 	return 0;
403 }
404 
devm_regulator_bulk_unregister_supply_alias(struct device * dev,const char * const * id,int num_id)405 static inline void devm_regulator_bulk_unregister_supply_alias(
406 	struct device *dev, const char *const *id, int num_id)
407 {
408 }
409 
regulator_enable(struct regulator * regulator)410 static inline int regulator_enable(struct regulator *regulator)
411 {
412 	return 0;
413 }
414 
regulator_disable(struct regulator * regulator)415 static inline int regulator_disable(struct regulator *regulator)
416 {
417 	return 0;
418 }
419 
regulator_force_disable(struct regulator * regulator)420 static inline int regulator_force_disable(struct regulator *regulator)
421 {
422 	return 0;
423 }
424 
regulator_disable_deferred(struct regulator * regulator,int ms)425 static inline int regulator_disable_deferred(struct regulator *regulator,
426 					     int ms)
427 {
428 	return 0;
429 }
430 
regulator_is_enabled(struct regulator * regulator)431 static inline int regulator_is_enabled(struct regulator *regulator)
432 {
433 	return 1;
434 }
435 
regulator_bulk_get(struct device * dev,int num_consumers,struct regulator_bulk_data * consumers)436 static inline int regulator_bulk_get(struct device *dev,
437 				     int num_consumers,
438 				     struct regulator_bulk_data *consumers)
439 {
440 	return 0;
441 }
442 
devm_regulator_bulk_get(struct device * dev,int num_consumers,struct regulator_bulk_data * consumers)443 static inline int devm_regulator_bulk_get(struct device *dev, int num_consumers,
444 					  struct regulator_bulk_data *consumers)
445 {
446 	return 0;
447 }
448 
regulator_bulk_enable(int num_consumers,struct regulator_bulk_data * consumers)449 static inline int regulator_bulk_enable(int num_consumers,
450 					struct regulator_bulk_data *consumers)
451 {
452 	return 0;
453 }
454 
regulator_bulk_disable(int num_consumers,struct regulator_bulk_data * consumers)455 static inline int regulator_bulk_disable(int num_consumers,
456 					 struct regulator_bulk_data *consumers)
457 {
458 	return 0;
459 }
460 
regulator_bulk_force_disable(int num_consumers,struct regulator_bulk_data * consumers)461 static inline int regulator_bulk_force_disable(int num_consumers,
462 					struct regulator_bulk_data *consumers)
463 {
464 	return 0;
465 }
466 
regulator_bulk_free(int num_consumers,struct regulator_bulk_data * consumers)467 static inline void regulator_bulk_free(int num_consumers,
468 				       struct regulator_bulk_data *consumers)
469 {
470 }
471 
regulator_set_voltage(struct regulator * regulator,int min_uV,int max_uV)472 static inline int regulator_set_voltage(struct regulator *regulator,
473 					int min_uV, int max_uV)
474 {
475 	return 0;
476 }
477 
regulator_set_voltage_time(struct regulator * regulator,int old_uV,int new_uV)478 static inline int regulator_set_voltage_time(struct regulator *regulator,
479 					     int old_uV, int new_uV)
480 {
481 	return 0;
482 }
483 
regulator_get_voltage(struct regulator * regulator)484 static inline int regulator_get_voltage(struct regulator *regulator)
485 {
486 	return -EINVAL;
487 }
488 
regulator_is_supported_voltage(struct regulator * regulator,int min_uV,int max_uV)489 static inline int regulator_is_supported_voltage(struct regulator *regulator,
490 				   int min_uV, int max_uV)
491 {
492 	return 0;
493 }
494 
regulator_get_linear_step(struct regulator * regulator)495 static inline unsigned int regulator_get_linear_step(struct regulator *regulator)
496 {
497 	return 0;
498 }
499 
regulator_set_current_limit(struct regulator * regulator,int min_uA,int max_uA)500 static inline int regulator_set_current_limit(struct regulator *regulator,
501 					     int min_uA, int max_uA)
502 {
503 	return 0;
504 }
505 
regulator_get_current_limit(struct regulator * regulator)506 static inline int regulator_get_current_limit(struct regulator *regulator)
507 {
508 	return 0;
509 }
510 
regulator_set_mode(struct regulator * regulator,unsigned int mode)511 static inline int regulator_set_mode(struct regulator *regulator,
512 	unsigned int mode)
513 {
514 	return 0;
515 }
516 
regulator_get_mode(struct regulator * regulator)517 static inline unsigned int regulator_get_mode(struct regulator *regulator)
518 {
519 	return REGULATOR_MODE_NORMAL;
520 }
521 
regulator_get_error_flags(struct regulator * regulator,unsigned int * flags)522 static inline int regulator_get_error_flags(struct regulator *regulator,
523 					    unsigned int *flags)
524 {
525 	return -EINVAL;
526 }
527 
regulator_set_load(struct regulator * regulator,int load_uA)528 static inline int regulator_set_load(struct regulator *regulator, int load_uA)
529 {
530 	return 0;
531 }
532 
regulator_allow_bypass(struct regulator * regulator,bool allow)533 static inline int regulator_allow_bypass(struct regulator *regulator,
534 					 bool allow)
535 {
536 	return 0;
537 }
538 
regulator_get_regmap(struct regulator * regulator)539 static inline struct regmap *regulator_get_regmap(struct regulator *regulator)
540 {
541 	return ERR_PTR(-EOPNOTSUPP);
542 }
543 
regulator_get_hardware_vsel_register(struct regulator * regulator,unsigned * vsel_reg,unsigned * vsel_mask)544 static inline int regulator_get_hardware_vsel_register(struct regulator *regulator,
545 						       unsigned *vsel_reg,
546 						       unsigned *vsel_mask)
547 {
548 	return -EOPNOTSUPP;
549 }
550 
regulator_list_hardware_vsel(struct regulator * regulator,unsigned selector)551 static inline int regulator_list_hardware_vsel(struct regulator *regulator,
552 					       unsigned selector)
553 {
554 	return -EOPNOTSUPP;
555 }
556 
regulator_register_notifier(struct regulator * regulator,struct notifier_block * nb)557 static inline int regulator_register_notifier(struct regulator *regulator,
558 			      struct notifier_block *nb)
559 {
560 	return 0;
561 }
562 
devm_regulator_register_notifier(struct regulator * regulator,struct notifier_block * nb)563 static inline int devm_regulator_register_notifier(struct regulator *regulator,
564 						   struct notifier_block *nb)
565 {
566 	return 0;
567 }
568 
regulator_unregister_notifier(struct regulator * regulator,struct notifier_block * nb)569 static inline int regulator_unregister_notifier(struct regulator *regulator,
570 				struct notifier_block *nb)
571 {
572 	return 0;
573 }
574 
devm_regulator_unregister_notifier(struct regulator * regulator,struct notifier_block * nb)575 static inline int devm_regulator_unregister_notifier(struct regulator *regulator,
576 						     struct notifier_block *nb)
577 {
578 	return 0;
579 }
580 
regulator_get_drvdata(struct regulator * regulator)581 static inline void *regulator_get_drvdata(struct regulator *regulator)
582 {
583 	return NULL;
584 }
585 
regulator_set_drvdata(struct regulator * regulator,void * data)586 static inline void regulator_set_drvdata(struct regulator *regulator,
587 	void *data)
588 {
589 }
590 
regulator_count_voltages(struct regulator * regulator)591 static inline int regulator_count_voltages(struct regulator *regulator)
592 {
593 	return 0;
594 }
595 
regulator_list_voltage(struct regulator * regulator,unsigned selector)596 static inline int regulator_list_voltage(struct regulator *regulator, unsigned selector)
597 {
598 	return -EINVAL;
599 }
600 
601 static inline void
regulator_bulk_set_supply_names(struct regulator_bulk_data * consumers,const char * const * supply_names,unsigned int num_supplies)602 regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
603 				const char *const *supply_names,
604 				unsigned int num_supplies)
605 {
606 }
607 
608 static inline bool
regulator_is_equal(struct regulator * reg1,struct regulator * reg2)609 regulator_is_equal(struct regulator *reg1, struct regulator *reg2)
610 {
611 	return false;
612 }
613 #endif
614 
regulator_set_voltage_triplet(struct regulator * regulator,int min_uV,int target_uV,int max_uV)615 static inline int regulator_set_voltage_triplet(struct regulator *regulator,
616 						int min_uV, int target_uV,
617 						int max_uV)
618 {
619 	if (regulator_set_voltage(regulator, target_uV, max_uV) == 0)
620 		return 0;
621 
622 	return regulator_set_voltage(regulator, min_uV, max_uV);
623 }
624 
regulator_set_voltage_tol(struct regulator * regulator,int new_uV,int tol_uV)625 static inline int regulator_set_voltage_tol(struct regulator *regulator,
626 					    int new_uV, int tol_uV)
627 {
628 	if (regulator_set_voltage(regulator, new_uV, new_uV + tol_uV) == 0)
629 		return 0;
630 	else
631 		return regulator_set_voltage(regulator,
632 					     new_uV - tol_uV, new_uV + tol_uV);
633 }
634 
regulator_is_supported_voltage_tol(struct regulator * regulator,int target_uV,int tol_uV)635 static inline int regulator_is_supported_voltage_tol(struct regulator *regulator,
636 						     int target_uV, int tol_uV)
637 {
638 	return regulator_is_supported_voltage(regulator,
639 					      target_uV - tol_uV,
640 					      target_uV + tol_uV);
641 }
642 
643 #endif
644