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