summaryrefslogtreecommitdiff
path: root/include/linux/regulator/consumer.h
blob: b9ce521910a00293f19a7289d600a91c04311383 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * consumer.h -- SoC Regulator consumer support.
 *
 * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
 *
 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
 *
 * 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_

#include <linux/err.h>
#include <linux/suspend.h>
#include <regulator/regulator.h>

struct device;
struct notifier_block;
struct regmap;
struct regulator_dev;

/*
 * 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_INVALID			0x0
#define REGULATOR_MODE_FAST			0x1
#define REGULATOR_MODE_NORMAL			0x2
#define REGULATOR_MODE_IDLE			0x4
#define REGULATOR_MODE_STANDBY			0x8

/*
 * Regulator errors that can be queried using regulator_get_error_flags
 *
 * 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.
 *
 * NOTE: These errors can be OR'ed together.
 */

#define REGULATOR_ERROR_UNDER_VOLTAGE		BIT(1)
#define REGULATOR_ERROR_OVER_CURRENT		BIT(2)
#define REGULATOR_ERROR_REGULATION_OUT		BIT(3)
#define REGULATOR_ERROR_FAIL			BIT(4)
#define REGULATOR_ERROR_OVER_TEMP		BIT(5)

#define REGULATOR_ERROR_UNDER_VOLTAGE_WARN	BIT(6)
#define REGULATOR_ERROR_OVER_CURRENT_WARN	BIT(7)
#define REGULATOR_ERROR_OVER_VOLTAGE_WARN	BIT(8)
#define REGULATOR_ERROR_OVER_TEMP_WARN		BIT(9)

/**
 * struct pre_voltage_change_data - Data sent with PRE_VOLTAGE_CHANGE event
 *
 * @old_uV: Current voltage before change.
 * @min_uV: Min voltage we'll change to.
 * @max_uV: Max voltage we'll change to.
 */
struct pre_voltage_change_data {
	unsigned long old_uV;
	unsigned long min_uV;
	unsigned long max_uV;
};

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.
 * @init_load_uA: After getting the regulator, regulator_set_load() will be
 *                called with this load.  Initialised by the user before
 *                using the bulk regulator APIs.
 *
 * 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;
	int init_load_uA;

	/* 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);
int devm_regulator_get_enable(struct device *dev, const char *id);
int devm_regulator_get_enable_optional(struct device *dev, const char *id);
int devm_regulator_get_enable_read_voltage(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);

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);

/* 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 of_regulator_bulk_get_all(struct device *dev, struct device_node *np,
					   struct regulator_bulk_data **consumers);
int __must_check devm_regulator_bulk_get(struct device *dev, int num_consumers,
					 struct regulator_bulk_data *consumers);
void devm_regulator_bulk_put(struct regulator_bulk_data *consumers);
int __must_check devm_regulator_bulk_get_exclusive(struct device *dev, int num_consumers,
						   struct regulator_bulk_data *consumers);
int __must_check devm_regulator_bulk_get_const(
	struct device *dev, int num_consumers,
	const struct regulator_bulk_data *in_consumers,
	struct regulator_bulk_data **out_consumers);
int __must_check regulator_bulk_enable(int num_consumers,
				       struct regulator_bulk_data *consumers);
int devm_regulator_bulk_get_enable(struct device *dev, int num_consumers,
				   const char * const *id);
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_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_get_error_flags(struct regulator *regulator,
				unsigned int *flags);
int regulator_set_load(struct regulator *regulator, int load_uA);

int regulator_allow_bypass(struct regulator *regulator, bool allow);

struct regmap *regulator_get_regmap(struct regulator *regulator);
int regulator_get_hardware_vsel_register(struct regulator *regulator,
					 unsigned *vsel_reg,
					 unsigned *vsel_mask);
int regulator_list_hardware_vsel(struct regulator *regulator,
				 unsigned selector);
int regulator_hardware_enable(struct regulator *regulator, bool enable);

/* regulator notifier block */
int regulator_register_notifier(struct regulator *regulator,
			      struct notifier_block *nb);
int devm_regulator_register_notifier(struct regulator *regulator,
				     struct notifier_block *nb);
int regulator_unregister_notifier(struct regulator *regulator,
				struct notifier_block *nb);
void devm_regulator_unregister_notifier(struct regulator *regulator,
					struct notifier_block *nb);

/* regulator suspend */
int regulator_suspend_enable(struct regulator_dev *rdev,
			     suspend_state_t state);
int regulator_suspend_disable(struct regulator_dev *rdev,
			      suspend_state_t state);
int regulator_set_suspend_voltage(struct regulator *regulator, int min_uV,
				  int max_uV, suspend_state_t state);

/* driver data - core doesn't touch */
void *regulator_get_drvdata(struct regulator *regulator);
void regulator_set_drvdata(struct regulator *regulator, void *data);

/* misc helpers */

void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
				     const char *const *supply_names,
				     unsigned int num_supplies);

bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2);

#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 ERR_PTR(-ENODEV);
}

static inline struct regulator *__must_check
devm_regulator_get_exclusive(struct device *dev, const char *id)
{
	return ERR_PTR(-ENODEV);
}

static inline int devm_regulator_get_enable(struct device *dev, const char *id)
{
	return 0;
}

static inline int devm_regulator_get_enable_optional(struct device *dev,
						     const char *id)
{
	return 0;
}

static inline int devm_regulator_get_enable_read_voltage(struct device *dev,
							 const char *id)
{
	return -ENODEV;
}

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 void devm_regulator_bulk_put(struct regulator_bulk_data *consumers)
{
}

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 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 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 of_regulator_bulk_get_all(struct device *dev, struct device_node *np,
					    struct regulator_bulk_data **consumers)
{
	return 0;
}

static inline int devm_regulator_bulk_get_const(
	struct device *dev, int num_consumers,
	const struct regulator_bulk_data *in_consumers,
	struct regulator_bulk_data **out_consumers)
{
	return 0;
}

static inline int regulator_bulk_enable(int num_consumers,
					struct regulator_bulk_data *consumers)
{
	return 0;
}

static inline int devm_regulator_bulk_get_enable(struct device *dev,
						 int num_consumers,
						 const char * const *id)
{
	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_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_sync_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 unsigned int regulator_get_linear_step(struct regulator *regulator)
{
	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_get_error_flags(struct regulator *regulator,
					    unsigned int *flags)
{
	return -EINVAL;
}

static inline int regulator_set_load(struct regulator *regulator, int load_uA)
{
	return 0;
}

static inline int regulator_allow_bypass(struct regulator *regulator,
					 bool allow)
{
	return 0;
}

static inline struct regmap *regulator_get_regmap(struct regulator *regulator)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline int regulator_get_hardware_vsel_register(struct regulator *regulator,
						       unsigned *vsel_reg,
						       unsigned *vsel_mask)
{
	return -EOPNOTSUPP;
}

static inline int regulator_list_hardware_vsel(struct regulator *regulator,
					       unsigned selector)
{
	return -EOPNOTSUPP;
}

static inline int regulator_hardware_enable(struct regulator *regulator,
					    bool enable)
{
	return -EOPNOTSUPP;
}

static inline int regulator_register_notifier(struct regulator *regulator,
			      struct notifier_block *nb)
{
	return 0;
}

static inline int devm_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 int devm_regulator_unregister_notifier(struct regulator *regulator,
						     struct notifier_block *nb)
{
	return 0;
}

static inline int regulator_suspend_enable(struct regulator_dev *rdev,
					   suspend_state_t state)
{
	return -EINVAL;
}

static inline int regulator_suspend_disable(struct regulator_dev *rdev,
					    suspend_state_t state)
{
	return -EINVAL;
}

static inline int regulator_set_suspend_voltage(struct regulator *regulator,
						int min_uV, int max_uV,
						suspend_state_t state)
{
	return -EINVAL;
}

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;
}

static inline int regulator_list_voltage(struct regulator *regulator, unsigned selector)
{
	return -EINVAL;
}

static inline void
regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
				const char *const *supply_names,
				unsigned int num_supplies)
{
}

static inline bool
regulator_is_equal(struct regulator *reg1, struct regulator *reg2)
{
	return false;
}
#endif

static inline int regulator_set_voltage_triplet(struct regulator *regulator,
						int min_uV, int target_uV,
						int max_uV)
{
	if (regulator_set_voltage(regulator, target_uV, max_uV) == 0)
		return 0;

	return regulator_set_voltage(regulator, min_uV, max_uV);
}

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