summaryrefslogtreecommitdiffstats
path: root/include/linux/pm_opp.h
blob: dc1fb5890792950a79bdb7b036da2ed3c5e45a94 (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
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Generic OPP Interface
 *
 * Copyright (C) 2009-2010 Texas Instruments Incorporated.
 *	Nishanth Menon
 *	Romit Dasgupta
 *	Kevin Hilman
 */

#ifndef __LINUX_OPP_H__
#define __LINUX_OPP_H__

#include <linux/energy_model.h>
#include <linux/err.h>
#include <linux/notifier.h>

struct clk;
struct regulator;
struct dev_pm_opp;
struct device;
struct opp_table;

enum dev_pm_opp_event {
	OPP_EVENT_ADD, OPP_EVENT_REMOVE, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
	OPP_EVENT_ADJUST_VOLTAGE,
};

/**
 * struct dev_pm_opp_supply - Power supply voltage/current values
 * @u_volt:	Target voltage in microvolts corresponding to this OPP
 * @u_volt_min:	Minimum voltage in microvolts corresponding to this OPP
 * @u_volt_max:	Maximum voltage in microvolts corresponding to this OPP
 * @u_amp:	Maximum current drawn by the device in microamperes
 * @u_watt:	Power used by the device in microwatts
 *
 * This structure stores the voltage/current/power values for a single power
 * supply.
 */
struct dev_pm_opp_supply {
	unsigned long u_volt;
	unsigned long u_volt_min;
	unsigned long u_volt_max;
	unsigned long u_amp;
	unsigned long u_watt;
};

/**
 * struct dev_pm_opp_icc_bw - Interconnect bandwidth values
 * @avg:	Average bandwidth corresponding to this OPP (in icc units)
 * @peak:	Peak bandwidth corresponding to this OPP (in icc units)
 *
 * This structure stores the bandwidth values for a single interconnect path.
 */
struct dev_pm_opp_icc_bw {
	u32 avg;
	u32 peak;
};

typedef int (*config_regulators_t)(struct device *dev,
			struct dev_pm_opp *old_opp, struct dev_pm_opp *new_opp,
			struct regulator **regulators, unsigned int count);

typedef int (*config_clks_t)(struct device *dev, struct opp_table *opp_table,
			struct dev_pm_opp *opp, void *data, bool scaling_down);

/**
 * struct dev_pm_opp_config - Device OPP configuration values
 * @clk_names: Clk names, NULL terminated array.
 * @config_clks: Custom set clk helper.
 * @prop_name: Name to postfix to properties.
 * @config_regulators: Custom set regulator helper.
 * @supported_hw: Array of hierarchy of versions to match.
 * @supported_hw_count: Number of elements in the array.
 * @regulator_names: Array of pointers to the names of the regulator, NULL terminated.
 * @genpd_names: Null terminated array of pointers containing names of genpd to
 *		 attach.
 * @virt_devs: Pointer to return the array of virtual devices.
 *
 * This structure contains platform specific OPP configurations for the device.
 */
struct dev_pm_opp_config {
	/* NULL terminated */
	const char * const *clk_names;
	config_clks_t config_clks;
	const char *prop_name;
	config_regulators_t config_regulators;
	const unsigned int *supported_hw;
	unsigned int supported_hw_count;
	const char * const *regulator_names;
	const char * const *genpd_names;
	struct device ***virt_devs;
};

#if defined(CONFIG_PM_OPP)

struct opp_table *dev_pm_opp_get_opp_table(struct device *dev);
void dev_pm_opp_put_opp_table(struct opp_table *opp_table);

unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);

int dev_pm_opp_get_supplies(struct dev_pm_opp *opp, struct dev_pm_opp_supply *supplies);

unsigned long dev_pm_opp_get_power(struct dev_pm_opp *opp);

unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);

unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp);

unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp,
					    unsigned int index);

bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);

int dev_pm_opp_get_opp_count(struct device *dev);
unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev);

struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
					      unsigned long freq,
					      bool available);
struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
					      unsigned long *freq);

struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
					       unsigned int level);
struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
					      unsigned int *level);

struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
					     unsigned long *freq);

struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev,
					   unsigned int *bw, int index);

struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev,
					   unsigned int *bw, int index);

void dev_pm_opp_put(struct dev_pm_opp *opp);

int dev_pm_opp_add(struct device *dev, unsigned long freq,
		   unsigned long u_volt);
void dev_pm_opp_remove(struct device *dev, unsigned long freq);
void dev_pm_opp_remove_all_dynamic(struct device *dev);

int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq,
			      unsigned long u_volt, unsigned long u_volt_min,
			      unsigned long u_volt_max);

int dev_pm_opp_enable(struct device *dev, unsigned long freq);

int dev_pm_opp_disable(struct device *dev, unsigned long freq);

int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb);
int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb);

int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config);
int devm_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config);
void dev_pm_opp_clear_config(int token);
int dev_pm_opp_config_clks_simple(struct device *dev,
		struct opp_table *opp_table, struct dev_pm_opp *opp, void *data,
		bool scaling_down);

struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table, struct opp_table *dst_table, struct dev_pm_opp *src_opp);
int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp);
int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
void dev_pm_opp_remove_table(struct device *dev);
void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask);
int dev_pm_opp_sync_regulators(struct device *dev);
#else
static inline struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline struct opp_table *dev_pm_opp_get_opp_table_indexed(struct device *dev, int index)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline void dev_pm_opp_put_opp_table(struct opp_table *opp_table) {}

static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
{
	return 0;
}

static inline int dev_pm_opp_get_supplies(struct dev_pm_opp *opp, struct dev_pm_opp_supply *supplies)
{
	return -EOPNOTSUPP;
}

static inline unsigned long dev_pm_opp_get_power(struct dev_pm_opp *opp)
{
	return 0;
}

static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
{
	return 0;
}

static inline unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
{
	return 0;
}

static inline
unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp,
					    unsigned int index)
{
	return 0;
}

static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
{
	return false;
}

static inline int dev_pm_opp_get_opp_count(struct device *dev)
{
	return 0;
}

static inline unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev)
{
	return 0;
}

static inline unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
{
	return 0;
}

static inline unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev)
{
	return 0;
}

static inline unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
{
	return 0;
}

static inline struct dev_pm_opp *dev_pm_opp_find_level_exact(struct device *dev,
					unsigned int level)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
					unsigned int *level)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
					unsigned long freq, bool available)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
					unsigned long *freq)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
					unsigned long *freq)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev,
					unsigned int *bw, int index)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev,
					unsigned int *bw, int index)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline void dev_pm_opp_put(struct dev_pm_opp *opp) {}

static inline int dev_pm_opp_add(struct device *dev, unsigned long freq,
					unsigned long u_volt)
{
	return -EOPNOTSUPP;
}

static inline void dev_pm_opp_remove(struct device *dev, unsigned long freq)
{
}

static inline void dev_pm_opp_remove_all_dynamic(struct device *dev)
{
}

static inline int
dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq,
			  unsigned long u_volt, unsigned long u_volt_min,
			  unsigned long u_volt_max)
{
	return 0;
}

static inline int dev_pm_opp_enable(struct device *dev, unsigned long freq)
{
	return 0;
}

static inline int dev_pm_opp_disable(struct device *dev, unsigned long freq)
{
	return 0;
}

static inline int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_opp_unregister_notifier(struct device *dev, struct notifier_block *nb)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config)
{
	return -EOPNOTSUPP;
}

static inline int devm_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config)
{
	return -EOPNOTSUPP;
}

static inline void dev_pm_opp_clear_config(int token) {}

static inline int dev_pm_opp_config_clks_simple(struct device *dev,
		struct opp_table *opp_table, struct dev_pm_opp *opp, void *data,
		bool scaling_down)
{
	return -EOPNOTSUPP;
}

static inline struct dev_pm_opp *dev_pm_opp_xlate_required_opp(struct opp_table *src_table,
				struct opp_table *dst_table, struct dev_pm_opp *src_opp)
{
	return ERR_PTR(-EOPNOTSUPP);
}

static inline int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_opp_set_opp(struct device *dev, struct dev_pm_opp *opp)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
{
	return -EINVAL;
}

static inline void dev_pm_opp_remove_table(struct device *dev)
{
}

static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask)
{
}

static inline int dev_pm_opp_sync_regulators(struct device *dev)
{
	return -EOPNOTSUPP;
}

#endif		/* CONFIG_PM_OPP */

#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
int dev_pm_opp_of_add_table(struct device *dev);
int dev_pm_opp_of_add_table_indexed(struct device *dev, int index);
int devm_pm_opp_of_add_table_indexed(struct device *dev, int index);
void dev_pm_opp_of_remove_table(struct device *dev);
int devm_pm_opp_of_add_table(struct device *dev);
int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev);
struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp);
int of_get_required_opp_performance_state(struct device_node *np, int index);
int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_table *opp_table);
int dev_pm_opp_of_register_em(struct device *dev, struct cpumask *cpus);
static inline void dev_pm_opp_of_unregister_em(struct device *dev)
{
	em_dev_unregister_perf_domain(dev);
}
#else
static inline int dev_pm_opp_of_add_table(struct device *dev)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
{
	return -EOPNOTSUPP;
}

static inline int devm_pm_opp_of_add_table_indexed(struct device *dev, int index)
{
	return -EOPNOTSUPP;
}

static inline void dev_pm_opp_of_remove_table(struct device *dev)
{
}

static inline int devm_pm_opp_of_add_table(struct device *dev)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask)
{
	return -EOPNOTSUPP;
}

static inline void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask)
{
}

static inline int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask)
{
	return -EOPNOTSUPP;
}

static inline struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
{
	return NULL;
}

static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp)
{
	return NULL;
}

static inline int dev_pm_opp_of_register_em(struct device *dev,
					    struct cpumask *cpus)
{
	return -EOPNOTSUPP;
}

static inline void dev_pm_opp_of_unregister_em(struct device *dev)
{
}

static inline int of_get_required_opp_performance_state(struct device_node *np, int index)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_table *opp_table)
{
	return -EOPNOTSUPP;
}
#endif

/* OPP Configuration helpers */

/* Regulators helpers */
static inline int dev_pm_opp_set_regulators(struct device *dev,
					    const char * const names[])
{
	struct dev_pm_opp_config config = {
		.regulator_names = names,
	};

	return dev_pm_opp_set_config(dev, &config);
}

static inline void dev_pm_opp_put_regulators(int token)
{
	dev_pm_opp_clear_config(token);
}

static inline int devm_pm_opp_set_regulators(struct device *dev,
					     const char * const names[])
{
	struct dev_pm_opp_config config = {
		.regulator_names = names,
	};

	return devm_pm_opp_set_config(dev, &config);
}

/* Supported-hw helpers */
static inline int dev_pm_opp_set_supported_hw(struct device *dev,
					      const u32 *versions,
					      unsigned int count)
{
	struct dev_pm_opp_config config = {
		.supported_hw = versions,
		.supported_hw_count = count,
	};

	return dev_pm_opp_set_config(dev, &config);
}

static inline void dev_pm_opp_put_supported_hw(int token)
{
	dev_pm_opp_clear_config(token);
}

static inline int devm_pm_opp_set_supported_hw(struct device *dev,
					       const u32 *versions,
					       unsigned int count)
{
	struct dev_pm_opp_config config = {
		.supported_hw = versions,
		.supported_hw_count = count,
	};

	return devm_pm_opp_set_config(dev, &config);
}

/* clkname helpers */
static inline int dev_pm_opp_set_clkname(struct device *dev, const char *name)
{
	const char *names[] = { name, NULL };
	struct dev_pm_opp_config config = {
		.clk_names = names,
	};

	return dev_pm_opp_set_config(dev, &config);
}

static inline void dev_pm_opp_put_clkname(int token)
{
	dev_pm_opp_clear_config(token);
}

static inline int devm_pm_opp_set_clkname(struct device *dev, const char *name)
{
	const char *names[] = { name, NULL };
	struct dev_pm_opp_config config = {
		.clk_names = names,
	};

	return devm_pm_opp_set_config(dev, &config);
}

/* config-regulators helpers */
static inline int dev_pm_opp_set_config_regulators(struct device *dev,
						   config_regulators_t helper)
{
	struct dev_pm_opp_config config = {
		.config_regulators = helper,
	};

	return dev_pm_opp_set_config(dev, &config);
}

static inline void dev_pm_opp_put_config_regulators(int token)
{
	dev_pm_opp_clear_config(token);
}

/* genpd helpers */
static inline int dev_pm_opp_attach_genpd(struct device *dev,
					  const char * const *names,
					  struct device ***virt_devs)
{
	struct dev_pm_opp_config config = {
		.genpd_names = names,
		.virt_devs = virt_devs,
	};

	return dev_pm_opp_set_config(dev, &config);
}

static inline void dev_pm_opp_detach_genpd(int token)
{
	dev_pm_opp_clear_config(token);
}

static inline int devm_pm_opp_attach_genpd(struct device *dev,
					   const char * const *names,
					   struct device ***virt_devs)
{
	struct dev_pm_opp_config config = {
		.genpd_names = names,
		.virt_devs = virt_devs,
	};

	return devm_pm_opp_set_config(dev, &config);
}

/* prop-name helpers */
static inline int dev_pm_opp_set_prop_name(struct device *dev, const char *name)
{
	struct dev_pm_opp_config config = {
		.prop_name = name,
	};

	return dev_pm_opp_set_config(dev, &config);
}

static inline void dev_pm_opp_put_prop_name(int token)
{
	dev_pm_opp_clear_config(token);
}

#endif		/* __LINUX_OPP_H__ */