1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * linux/include/linux/cpufreq.h
4 *
5 * Copyright (C) 2001 Russell King
6 * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
7 */
8 #ifndef _LINUX_CPUFREQ_H
9 #define _LINUX_CPUFREQ_H
10
11 #include <linux/clk.h>
12 #include <linux/cpu.h>
13 #include <linux/cpumask.h>
14 #include <linux/completion.h>
15 #include <linux/kobject.h>
16 #include <linux/notifier.h>
17 #include <linux/of.h>
18 #include <linux/pm_opp.h>
19 #include <linux/pm_qos.h>
20 #include <linux/spinlock.h>
21 #include <linux/sysfs.h>
22 #include <linux/minmax.h>
23
24 /*********************************************************************
25 * CPUFREQ INTERFACE *
26 *********************************************************************/
27 /*
28 * Frequency values here are CPU kHz
29 */
30
31 #define CPUFREQ_DEFAULT_TRANSITION_LATENCY_NS NSEC_PER_MSEC
32
33 #define CPUFREQ_NAME_LEN 16
34 /* Print length for names. Extra 1 space for accommodating '\n' in prints */
35 #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
36
37 struct cpufreq_governor;
38
39 enum cpufreq_table_sorting {
40 CPUFREQ_TABLE_UNSORTED,
41 CPUFREQ_TABLE_SORTED_ASCENDING,
42 CPUFREQ_TABLE_SORTED_DESCENDING
43 };
44
45 struct cpufreq_cpuinfo {
46 unsigned int max_freq;
47 unsigned int min_freq;
48
49 /* in 10^(-9) s = nanoseconds */
50 unsigned int transition_latency;
51 };
52
53 struct cpufreq_policy {
54 /* CPUs sharing clock, require sw coordination */
55 cpumask_var_t cpus; /* Online CPUs only */
56 cpumask_var_t related_cpus; /* Online + Offline CPUs */
57 cpumask_var_t real_cpus; /* Related and present */
58
59 unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs
60 should set cpufreq */
61 unsigned int cpu; /* cpu managing this policy, must be online */
62
63 struct clk *clk;
64 struct cpufreq_cpuinfo cpuinfo;/* see above */
65
66 unsigned int min; /* in kHz */
67 unsigned int max; /* in kHz */
68 unsigned int cur; /* in kHz, only needed if cpufreq
69 * governors are used */
70 unsigned int suspend_freq; /* freq to set during suspend */
71
72 unsigned int policy; /* see above */
73 unsigned int last_policy; /* policy before unplug */
74 struct cpufreq_governor *governor; /* see below */
75 void *governor_data;
76 char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */
77
78 struct work_struct update; /* if update_policy() needs to be
79 * called, but you're in IRQ context */
80
81 struct freq_constraints constraints;
82 struct freq_qos_request *min_freq_req;
83 struct freq_qos_request *max_freq_req;
84
85 struct cpufreq_frequency_table *freq_table;
86 enum cpufreq_table_sorting freq_table_sorted;
87
88 struct list_head policy_list;
89 struct kobject kobj;
90 struct completion kobj_unregister;
91
92 /*
93 * The rules for this semaphore:
94 * - Any routine that wants to read from the policy structure will
95 * do a down_read on this semaphore.
96 * - Any routine that will write to the policy structure and/or may take away
97 * the policy altogether (eg. CPU hotplug), will hold this lock in write
98 * mode before doing so.
99 */
100 struct rw_semaphore rwsem;
101
102 /*
103 * Fast switch flags:
104 * - fast_switch_possible should be set by the driver if it can
105 * guarantee that frequency can be changed on any CPU sharing the
106 * policy and that the change will affect all of the policy CPUs then.
107 * - fast_switch_enabled is to be set by governors that support fast
108 * frequency switching with the help of cpufreq_enable_fast_switch().
109 */
110 bool fast_switch_possible;
111 bool fast_switch_enabled;
112
113 /*
114 * Set if the CPUFREQ_GOV_STRICT_TARGET flag is set for the current
115 * governor.
116 */
117 bool strict_target;
118
119 /*
120 * Set if inefficient frequencies were found in the frequency table.
121 * This indicates if the relation flag CPUFREQ_RELATION_E can be
122 * honored.
123 */
124 bool efficiencies_available;
125
126 /*
127 * Preferred average time interval between consecutive invocations of
128 * the driver to set the frequency for this policy. To be set by the
129 * scaling driver (0, which is the default, means no preference).
130 */
131 unsigned int transition_delay_us;
132
133 /*
134 * Remote DVFS flag (Not added to the driver structure as we don't want
135 * to access another structure from scheduler hotpath).
136 *
137 * Should be set if CPUs can do DVFS on behalf of other CPUs from
138 * different cpufreq policies.
139 */
140 bool dvfs_possible_from_any_cpu;
141
142 /* Per policy boost enabled flag. */
143 bool boost_enabled;
144
145 /* Per policy boost supported flag. */
146 bool boost_supported;
147
148 /* Cached frequency lookup from cpufreq_driver_resolve_freq. */
149 unsigned int cached_target_freq;
150 unsigned int cached_resolved_idx;
151
152 /* Synchronization for frequency transitions */
153 bool transition_ongoing; /* Tracks transition status */
154 spinlock_t transition_lock;
155 wait_queue_head_t transition_wait;
156 struct task_struct *transition_task; /* Task which is doing the transition */
157
158 /* cpufreq-stats */
159 struct cpufreq_stats *stats;
160
161 /* For cpufreq driver's internal use */
162 void *driver_data;
163
164 /* Pointer to the cooling device if used for thermal mitigation */
165 struct thermal_cooling_device *cdev;
166
167 struct notifier_block nb_min;
168 struct notifier_block nb_max;
169 };
170
171 DEFINE_GUARD(cpufreq_policy_write, struct cpufreq_policy *,
172 down_write(&_T->rwsem), up_write(&_T->rwsem))
173
174 DEFINE_GUARD(cpufreq_policy_read, struct cpufreq_policy *,
175 down_read(&_T->rwsem), up_read(&_T->rwsem))
176
177 /*
178 * Used for passing new cpufreq policy data to the cpufreq driver's ->verify()
179 * callback for sanitization. That callback is only expected to modify the min
180 * and max values, if necessary, and specifically it must not update the
181 * frequency table.
182 */
183 struct cpufreq_policy_data {
184 struct cpufreq_cpuinfo cpuinfo;
185 struct cpufreq_frequency_table *freq_table;
186 unsigned int cpu;
187 unsigned int min; /* in kHz */
188 unsigned int max; /* in kHz */
189 };
190
191 struct cpufreq_freqs {
192 struct cpufreq_policy *policy;
193 unsigned int old;
194 unsigned int new;
195 u8 flags; /* flags of cpufreq_driver, see below. */
196 };
197
198 /* Only for ACPI */
199 #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
200 #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */
201 #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
202 #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
203
204 #ifdef CONFIG_CPU_FREQ
205 struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu);
206 struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
207 void cpufreq_cpu_put(struct cpufreq_policy *policy);
208 #else
cpufreq_cpu_get_raw(unsigned int cpu)209 static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu)
210 {
211 return NULL;
212 }
cpufreq_cpu_get(unsigned int cpu)213 static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
214 {
215 return NULL;
216 }
cpufreq_cpu_put(struct cpufreq_policy * policy)217 static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { }
218 #endif
219
220 /* Scope based cleanup macro for cpufreq_policy kobject reference counting */
DEFINE_FREE(put_cpufreq_policy,struct cpufreq_policy *,if (_T)cpufreq_cpu_put (_T))221 DEFINE_FREE(put_cpufreq_policy, struct cpufreq_policy *, if (_T) cpufreq_cpu_put(_T))
222
223 static inline bool policy_is_inactive(struct cpufreq_policy *policy)
224 {
225 return cpumask_empty(policy->cpus);
226 }
227
policy_is_shared(struct cpufreq_policy * policy)228 static inline bool policy_is_shared(struct cpufreq_policy *policy)
229 {
230 return cpumask_weight(policy->cpus) > 1;
231 }
232
233 #ifdef CONFIG_CPU_FREQ
234 unsigned int cpufreq_get(unsigned int cpu);
235 unsigned int cpufreq_quick_get(unsigned int cpu);
236 unsigned int cpufreq_quick_get_max(unsigned int cpu);
237 unsigned int cpufreq_get_hw_max_freq(unsigned int cpu);
238 void disable_cpufreq(void);
239
240 u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
241
242 void refresh_frequency_limits(struct cpufreq_policy *policy);
243 void cpufreq_update_policy(unsigned int cpu);
244 void cpufreq_update_limits(unsigned int cpu);
245 bool have_governor_per_policy(void);
246 bool cpufreq_supports_freq_invariance(void);
247 struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
248 void cpufreq_enable_fast_switch(struct cpufreq_policy *policy);
249 void cpufreq_disable_fast_switch(struct cpufreq_policy *policy);
250 bool has_target_index(void);
251
252 DECLARE_PER_CPU(unsigned long, cpufreq_pressure);
cpufreq_get_pressure(int cpu)253 static inline unsigned long cpufreq_get_pressure(int cpu)
254 {
255 return READ_ONCE(per_cpu(cpufreq_pressure, cpu));
256 }
257 #else
cpufreq_get(unsigned int cpu)258 static inline unsigned int cpufreq_get(unsigned int cpu)
259 {
260 return 0;
261 }
cpufreq_quick_get(unsigned int cpu)262 static inline unsigned int cpufreq_quick_get(unsigned int cpu)
263 {
264 return 0;
265 }
cpufreq_quick_get_max(unsigned int cpu)266 static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
267 {
268 return 0;
269 }
cpufreq_get_hw_max_freq(unsigned int cpu)270 static inline unsigned int cpufreq_get_hw_max_freq(unsigned int cpu)
271 {
272 return 0;
273 }
cpufreq_supports_freq_invariance(void)274 static inline bool cpufreq_supports_freq_invariance(void)
275 {
276 return false;
277 }
disable_cpufreq(void)278 static inline void disable_cpufreq(void) { }
cpufreq_update_limits(unsigned int cpu)279 static inline void cpufreq_update_limits(unsigned int cpu) { }
cpufreq_get_pressure(int cpu)280 static inline unsigned long cpufreq_get_pressure(int cpu)
281 {
282 return 0;
283 }
284 #endif
285
286 #ifdef CONFIG_CPU_FREQ_STAT
287 void cpufreq_stats_create_table(struct cpufreq_policy *policy);
288 void cpufreq_stats_free_table(struct cpufreq_policy *policy);
289 void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
290 unsigned int new_freq);
291 #else
cpufreq_stats_create_table(struct cpufreq_policy * policy)292 static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { }
cpufreq_stats_free_table(struct cpufreq_policy * policy)293 static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { }
cpufreq_stats_record_transition(struct cpufreq_policy * policy,unsigned int new_freq)294 static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
295 unsigned int new_freq) { }
296 #endif /* CONFIG_CPU_FREQ_STAT */
297
298 /*********************************************************************
299 * CPUFREQ DRIVER INTERFACE *
300 *********************************************************************/
301
302 #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
303 #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
304 #define CPUFREQ_RELATION_C 2 /* closest frequency to target */
305 /* relation flags */
306 #define CPUFREQ_RELATION_E BIT(2) /* Get if possible an efficient frequency */
307
308 #define CPUFREQ_RELATION_LE (CPUFREQ_RELATION_L | CPUFREQ_RELATION_E)
309 #define CPUFREQ_RELATION_HE (CPUFREQ_RELATION_H | CPUFREQ_RELATION_E)
310 #define CPUFREQ_RELATION_CE (CPUFREQ_RELATION_C | CPUFREQ_RELATION_E)
311
312 struct freq_attr {
313 struct attribute attr;
314 ssize_t (*show)(struct cpufreq_policy *, char *);
315 ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
316 };
317
318 #define cpufreq_freq_attr_ro(_name) \
319 static struct freq_attr _name = \
320 __ATTR(_name, 0444, show_##_name, NULL)
321
322 #define cpufreq_freq_attr_ro_perm(_name, _perm) \
323 static struct freq_attr _name = \
324 __ATTR(_name, _perm, show_##_name, NULL)
325
326 #define cpufreq_freq_attr_rw(_name) \
327 static struct freq_attr _name = \
328 __ATTR(_name, 0644, show_##_name, store_##_name)
329
330 #define cpufreq_freq_attr_wo(_name) \
331 static struct freq_attr _name = \
332 __ATTR(_name, 0200, NULL, store_##_name)
333
334 #define define_one_global_ro(_name) \
335 static struct kobj_attribute _name = \
336 __ATTR(_name, 0444, show_##_name, NULL)
337
338 #define define_one_global_rw(_name) \
339 static struct kobj_attribute _name = \
340 __ATTR(_name, 0644, show_##_name, store_##_name)
341
342
343 struct cpufreq_driver {
344 char name[CPUFREQ_NAME_LEN];
345 u16 flags;
346 void *driver_data;
347
348 /* needed by all drivers */
349 int (*init)(struct cpufreq_policy *policy);
350 int (*verify)(struct cpufreq_policy_data *policy);
351
352 /* define one out of two */
353 int (*setpolicy)(struct cpufreq_policy *policy);
354
355 int (*target)(struct cpufreq_policy *policy,
356 unsigned int target_freq,
357 unsigned int relation); /* Deprecated */
358 int (*target_index)(struct cpufreq_policy *policy,
359 unsigned int index);
360 unsigned int (*fast_switch)(struct cpufreq_policy *policy,
361 unsigned int target_freq);
362 /*
363 * ->fast_switch() replacement for drivers that use an internal
364 * representation of performance levels and can pass hints other than
365 * the target performance level to the hardware. This can only be set
366 * if ->fast_switch is set too, because in those cases (under specific
367 * conditions) scale invariance can be disabled, which causes the
368 * schedutil governor to fall back to the latter.
369 */
370 void (*adjust_perf)(unsigned int cpu,
371 unsigned long min_perf,
372 unsigned long target_perf,
373 unsigned long capacity);
374
375 /*
376 * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION
377 * unset.
378 *
379 * get_intermediate should return a stable intermediate frequency
380 * platform wants to switch to and target_intermediate() should set CPU
381 * to that frequency, before jumping to the frequency corresponding
382 * to 'index'. Core will take care of sending notifications and driver
383 * doesn't have to handle them in target_intermediate() or
384 * target_index().
385 *
386 * Drivers can return '0' from get_intermediate() in case they don't
387 * wish to switch to intermediate frequency for some target frequency.
388 * In that case core will directly call ->target_index().
389 */
390 unsigned int (*get_intermediate)(struct cpufreq_policy *policy,
391 unsigned int index);
392 int (*target_intermediate)(struct cpufreq_policy *policy,
393 unsigned int index);
394
395 /* should be defined, if possible, return 0 on error */
396 unsigned int (*get)(unsigned int cpu);
397
398 /* Called to update policy limits on firmware notifications. */
399 void (*update_limits)(struct cpufreq_policy *policy);
400
401 /* optional */
402 int (*bios_limit)(int cpu, unsigned int *limit);
403
404 int (*online)(struct cpufreq_policy *policy);
405 int (*offline)(struct cpufreq_policy *policy);
406 void (*exit)(struct cpufreq_policy *policy);
407 int (*suspend)(struct cpufreq_policy *policy);
408 int (*resume)(struct cpufreq_policy *policy);
409
410 /* Will be called after the driver is fully initialized */
411 void (*ready)(struct cpufreq_policy *policy);
412
413 struct freq_attr **attr;
414
415 /* platform specific boost support code */
416 bool boost_enabled;
417 int (*set_boost)(struct cpufreq_policy *policy, int state);
418
419 /*
420 * Set by drivers that want to register with the energy model after the
421 * policy is properly initialized, but before the governor is started.
422 */
423 void (*register_em)(struct cpufreq_policy *policy);
424 };
425
426 /* flags */
427
428 /*
429 * Set by drivers that need to update internal upper and lower boundaries along
430 * with the target frequency and so the core and governors should also invoke
431 * the diver if the target frequency does not change, but the policy min or max
432 * may have changed.
433 */
434 #define CPUFREQ_NEED_UPDATE_LIMITS BIT(0)
435
436 /* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */
437 #define CPUFREQ_CONST_LOOPS BIT(1)
438
439 /*
440 * Set by drivers that want the core to automatically register the cpufreq
441 * driver as a thermal cooling device.
442 */
443 #define CPUFREQ_IS_COOLING_DEV BIT(2)
444
445 /*
446 * This should be set by platforms having multiple clock-domains, i.e.
447 * supporting multiple policies. With this sysfs directories of governor would
448 * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same
449 * governor with different tunables for different clusters.
450 */
451 #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3)
452
453 /*
454 * Driver will do POSTCHANGE notifications from outside of their ->target()
455 * routine and so must set cpufreq_driver->flags with this flag, so that core
456 * can handle them specially.
457 */
458 #define CPUFREQ_ASYNC_NOTIFICATION BIT(4)
459
460 /*
461 * Set by drivers which want cpufreq core to check if CPU is running at a
462 * frequency present in freq-table exposed by the driver. For these drivers if
463 * CPU is found running at an out of table freq, we will try to set it to a freq
464 * from the table. And if that fails, we will stop further boot process by
465 * issuing a BUG_ON().
466 */
467 #define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5)
468
469 /*
470 * Set by drivers to disallow use of governors with "dynamic_switching" flag
471 * set.
472 */
473 #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6)
474
475 int cpufreq_register_driver(struct cpufreq_driver *driver_data);
476 void cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
477
478 bool cpufreq_driver_test_flags(u16 flags);
479 const char *cpufreq_get_current_driver(void);
480 void *cpufreq_get_driver_data(void);
481
cpufreq_thermal_control_enabled(struct cpufreq_driver * drv)482 static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver *drv)
483 {
484 return IS_ENABLED(CONFIG_CPU_THERMAL) &&
485 (drv->flags & CPUFREQ_IS_COOLING_DEV);
486 }
487
cpufreq_verify_within_limits(struct cpufreq_policy_data * policy,unsigned int min,unsigned int max)488 static inline void cpufreq_verify_within_limits(struct cpufreq_policy_data *policy,
489 unsigned int min,
490 unsigned int max)
491 {
492 policy->max = clamp(policy->max, min, max);
493 policy->min = clamp(policy->min, min, policy->max);
494 }
495
496 static inline void
cpufreq_verify_within_cpu_limits(struct cpufreq_policy_data * policy)497 cpufreq_verify_within_cpu_limits(struct cpufreq_policy_data *policy)
498 {
499 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
500 policy->cpuinfo.max_freq);
501 }
502
503 #ifdef CONFIG_CPU_FREQ
504 void cpufreq_suspend(void);
505 void cpufreq_resume(void);
506 int cpufreq_generic_suspend(struct cpufreq_policy *policy);
507 #else
cpufreq_suspend(void)508 static inline void cpufreq_suspend(void) {}
cpufreq_resume(void)509 static inline void cpufreq_resume(void) {}
510 #endif
511
512 /*********************************************************************
513 * CPUFREQ NOTIFIER INTERFACE *
514 *********************************************************************/
515
516 #define CPUFREQ_TRANSITION_NOTIFIER (0)
517 #define CPUFREQ_POLICY_NOTIFIER (1)
518
519 /* Transition notifiers */
520 #define CPUFREQ_PRECHANGE (0)
521 #define CPUFREQ_POSTCHANGE (1)
522
523 /* Policy Notifiers */
524 #define CPUFREQ_CREATE_POLICY (0)
525 #define CPUFREQ_REMOVE_POLICY (1)
526
527 #ifdef CONFIG_CPU_FREQ
528 int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
529 int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
530
531 void cpufreq_freq_transition_begin(struct cpufreq_policy *policy,
532 struct cpufreq_freqs *freqs);
533 void cpufreq_freq_transition_end(struct cpufreq_policy *policy,
534 struct cpufreq_freqs *freqs, int transition_failed);
535
536 #else /* CONFIG_CPU_FREQ */
cpufreq_register_notifier(struct notifier_block * nb,unsigned int list)537 static inline int cpufreq_register_notifier(struct notifier_block *nb,
538 unsigned int list)
539 {
540 return 0;
541 }
cpufreq_unregister_notifier(struct notifier_block * nb,unsigned int list)542 static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
543 unsigned int list)
544 {
545 return 0;
546 }
547 #endif /* !CONFIG_CPU_FREQ */
548
549 /**
550 * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
551 * safe)
552 * @old: old value
553 * @div: divisor
554 * @mult: multiplier
555 *
556 *
557 * new = old * mult / div
558 */
cpufreq_scale(unsigned long old,u_int div,u_int mult)559 static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
560 u_int mult)
561 {
562 #if BITS_PER_LONG == 32
563 u64 result = ((u64) old) * ((u64) mult);
564 do_div(result, div);
565 return (unsigned long) result;
566
567 #elif BITS_PER_LONG == 64
568 unsigned long result = old * ((u64) mult);
569 result /= div;
570 return result;
571 #endif
572 }
573
574 /*********************************************************************
575 * CPUFREQ GOVERNORS *
576 *********************************************************************/
577
578 #define CPUFREQ_POLICY_UNKNOWN (0)
579 /*
580 * If (cpufreq_driver->target) exists, the ->governor decides what frequency
581 * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
582 * two generic policies are available:
583 */
584 #define CPUFREQ_POLICY_POWERSAVE (1)
585 #define CPUFREQ_POLICY_PERFORMANCE (2)
586
587 struct cpufreq_governor {
588 char name[CPUFREQ_NAME_LEN];
589 int (*init)(struct cpufreq_policy *policy);
590 void (*exit)(struct cpufreq_policy *policy);
591 int (*start)(struct cpufreq_policy *policy);
592 void (*stop)(struct cpufreq_policy *policy);
593 void (*limits)(struct cpufreq_policy *policy);
594 ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
595 char *buf);
596 int (*store_setspeed) (struct cpufreq_policy *policy,
597 unsigned int freq);
598 struct list_head governor_list;
599 struct module *owner;
600 u8 flags;
601 };
602
603 /* Governor flags */
604
605 /* For governors which change frequency dynamically by themselves */
606 #define CPUFREQ_GOV_DYNAMIC_SWITCHING BIT(0)
607
608 /* For governors wanting the target frequency to be set exactly */
609 #define CPUFREQ_GOV_STRICT_TARGET BIT(1)
610
611
612 /* Pass a target to the cpufreq driver */
613 unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy,
614 unsigned int target_freq);
615 void cpufreq_driver_adjust_perf(unsigned int cpu,
616 unsigned long min_perf,
617 unsigned long target_perf,
618 unsigned long capacity);
619 bool cpufreq_driver_has_adjust_perf(void);
620 int cpufreq_driver_target(struct cpufreq_policy *policy,
621 unsigned int target_freq,
622 unsigned int relation);
623 int __cpufreq_driver_target(struct cpufreq_policy *policy,
624 unsigned int target_freq,
625 unsigned int relation);
626 unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
627 unsigned int target_freq);
628 unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy);
629 int cpufreq_register_governor(struct cpufreq_governor *governor);
630 void cpufreq_unregister_governor(struct cpufreq_governor *governor);
631 int cpufreq_start_governor(struct cpufreq_policy *policy);
632 void cpufreq_stop_governor(struct cpufreq_policy *policy);
633
634 #define cpufreq_governor_init(__governor) \
635 static int __init __governor##_init(void) \
636 { \
637 return cpufreq_register_governor(&__governor); \
638 } \
639 core_initcall(__governor##_init)
640
641 #define cpufreq_governor_exit(__governor) \
642 static void __exit __governor##_exit(void) \
643 { \
644 return cpufreq_unregister_governor(&__governor); \
645 } \
646 module_exit(__governor##_exit)
647
648 struct cpufreq_governor *cpufreq_default_governor(void);
649 struct cpufreq_governor *cpufreq_fallback_governor(void);
650
651 #ifdef CONFIG_CPU_FREQ_GOV_SCHEDUTIL
652 bool sugov_is_governor(struct cpufreq_policy *policy);
653 #else
sugov_is_governor(struct cpufreq_policy * policy)654 static inline bool sugov_is_governor(struct cpufreq_policy *policy)
655 {
656 return false;
657 }
658 #endif
659
cpufreq_policy_apply_limits(struct cpufreq_policy * policy)660 static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy)
661 {
662 if (policy->max < policy->cur)
663 __cpufreq_driver_target(policy, policy->max,
664 CPUFREQ_RELATION_HE);
665 else if (policy->min > policy->cur)
666 __cpufreq_driver_target(policy, policy->min,
667 CPUFREQ_RELATION_LE);
668 }
669
670 /* Governor attribute set */
671 struct gov_attr_set {
672 struct kobject kobj;
673 struct list_head policy_list;
674 struct mutex update_lock;
675 int usage_count;
676 };
677
678 /* sysfs ops for cpufreq governors */
679 extern const struct sysfs_ops governor_sysfs_ops;
680
to_gov_attr_set(struct kobject * kobj)681 static inline struct gov_attr_set *to_gov_attr_set(struct kobject *kobj)
682 {
683 return container_of(kobj, struct gov_attr_set, kobj);
684 }
685
686 void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node);
687 void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node);
688 unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node);
689
690 /* Governor sysfs attribute */
691 struct governor_attr {
692 struct attribute attr;
693 ssize_t (*show)(struct gov_attr_set *attr_set, char *buf);
694 ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf,
695 size_t count);
696 };
697
698 /*********************************************************************
699 * FREQUENCY TABLE HELPERS *
700 *********************************************************************/
701
702 /* Special Values of .frequency field */
703 #define CPUFREQ_ENTRY_INVALID ~0u
704 #define CPUFREQ_TABLE_END ~1u
705 /* Special Values of .flags field */
706 #define CPUFREQ_BOOST_FREQ (1 << 0)
707 #define CPUFREQ_INEFFICIENT_FREQ (1 << 1)
708
709 struct cpufreq_frequency_table {
710 unsigned int flags;
711 unsigned int driver_data; /* driver specific data, not used by core */
712 unsigned int frequency; /* kHz - doesn't need to be in ascending
713 * order */
714 };
715
716 /*
717 * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table
718 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
719 * @table: the cpufreq_frequency_table * to iterate over.
720 */
721
722 #define cpufreq_for_each_entry(pos, table) \
723 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++)
724
725 /*
726 * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table
727 * with index
728 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
729 * @table: the cpufreq_frequency_table * to iterate over.
730 * @idx: the table entry currently being processed
731 */
732
733 #define cpufreq_for_each_entry_idx(pos, table, idx) \
734 for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \
735 pos++, idx++)
736
737 /*
738 * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table
739 * excluding CPUFREQ_ENTRY_INVALID frequencies.
740 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
741 * @table: the cpufreq_frequency_table * to iterate over.
742 */
743
744 #define cpufreq_for_each_valid_entry(pos, table) \
745 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \
746 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
747 continue; \
748 else
749
750 /*
751 * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq
752 * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies.
753 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
754 * @table: the cpufreq_frequency_table * to iterate over.
755 * @idx: the table entry currently being processed
756 */
757
758 #define cpufreq_for_each_valid_entry_idx(pos, table, idx) \
759 cpufreq_for_each_entry_idx(pos, table, idx) \
760 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
761 continue; \
762 else
763
764 /**
765 * cpufreq_for_each_efficient_entry_idx - iterate with index over a cpufreq
766 * frequency_table excluding CPUFREQ_ENTRY_INVALID and
767 * CPUFREQ_INEFFICIENT_FREQ frequencies.
768 * @pos: the &struct cpufreq_frequency_table to use as a loop cursor.
769 * @table: the &struct cpufreq_frequency_table to iterate over.
770 * @idx: the table entry currently being processed.
771 * @efficiencies: set to true to only iterate over efficient frequencies.
772 */
773
774 #define cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) \
775 cpufreq_for_each_valid_entry_idx(pos, table, idx) \
776 if (efficiencies && (pos->flags & CPUFREQ_INEFFICIENT_FREQ)) \
777 continue; \
778 else
779
780
781 int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy);
782
783 int cpufreq_frequency_table_verify(struct cpufreq_policy_data *policy);
784
785 int cpufreq_generic_frequency_table_verify(struct cpufreq_policy_data *policy);
786
787 int cpufreq_table_index_unsorted(struct cpufreq_policy *policy,
788 unsigned int target_freq, unsigned int min,
789 unsigned int max, unsigned int relation);
790 int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
791 unsigned int freq);
792
793 ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
794
795 #ifdef CONFIG_CPU_FREQ
796 bool cpufreq_boost_enabled(void);
797 int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state);
798
799 /* Find lowest freq at or above target in a table in ascending order */
cpufreq_table_find_index_al(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)800 static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy,
801 unsigned int target_freq,
802 bool efficiencies)
803 {
804 struct cpufreq_frequency_table *table = policy->freq_table;
805 struct cpufreq_frequency_table *pos;
806 unsigned int freq;
807 int idx, best = -1;
808
809 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
810 freq = pos->frequency;
811
812 if (freq >= target_freq)
813 return idx;
814
815 best = idx;
816 }
817
818 return best;
819 }
820
821 /* Find lowest freq at or above target in a table in descending order */
cpufreq_table_find_index_dl(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)822 static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy,
823 unsigned int target_freq,
824 bool efficiencies)
825 {
826 struct cpufreq_frequency_table *table = policy->freq_table;
827 struct cpufreq_frequency_table *pos;
828 unsigned int freq;
829 int idx, best = -1;
830
831 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
832 freq = pos->frequency;
833
834 if (freq == target_freq)
835 return idx;
836
837 if (freq > target_freq) {
838 best = idx;
839 continue;
840 }
841
842 /* No freq found above target_freq */
843 if (best == -1)
844 return idx;
845
846 return best;
847 }
848
849 return best;
850 }
851
find_index_l(struct cpufreq_policy * policy,unsigned int target_freq,unsigned int min,unsigned int max,bool efficiencies)852 static inline int find_index_l(struct cpufreq_policy *policy,
853 unsigned int target_freq,
854 unsigned int min, unsigned int max,
855 bool efficiencies)
856 {
857 target_freq = clamp_val(target_freq, min, max);
858
859 if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
860 return cpufreq_table_find_index_al(policy, target_freq,
861 efficiencies);
862 else
863 return cpufreq_table_find_index_dl(policy, target_freq,
864 efficiencies);
865 }
866
867 /* Works only on sorted freq-tables */
cpufreq_table_find_index_l(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)868 static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy,
869 unsigned int target_freq,
870 bool efficiencies)
871 {
872 return find_index_l(policy, target_freq, policy->min, policy->max, efficiencies);
873 }
874
875 /* Find highest freq at or below target in a table in ascending order */
cpufreq_table_find_index_ah(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)876 static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy,
877 unsigned int target_freq,
878 bool efficiencies)
879 {
880 struct cpufreq_frequency_table *table = policy->freq_table;
881 struct cpufreq_frequency_table *pos;
882 unsigned int freq;
883 int idx, best = -1;
884
885 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
886 freq = pos->frequency;
887
888 if (freq == target_freq)
889 return idx;
890
891 if (freq < target_freq) {
892 best = idx;
893 continue;
894 }
895
896 /* No freq found below target_freq */
897 if (best == -1)
898 return idx;
899
900 return best;
901 }
902
903 return best;
904 }
905
906 /* Find highest freq at or below target in a table in descending order */
cpufreq_table_find_index_dh(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)907 static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy,
908 unsigned int target_freq,
909 bool efficiencies)
910 {
911 struct cpufreq_frequency_table *table = policy->freq_table;
912 struct cpufreq_frequency_table *pos;
913 unsigned int freq;
914 int idx, best = -1;
915
916 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
917 freq = pos->frequency;
918
919 if (freq <= target_freq)
920 return idx;
921
922 best = idx;
923 }
924
925 return best;
926 }
927
find_index_h(struct cpufreq_policy * policy,unsigned int target_freq,unsigned int min,unsigned int max,bool efficiencies)928 static inline int find_index_h(struct cpufreq_policy *policy,
929 unsigned int target_freq,
930 unsigned int min, unsigned int max,
931 bool efficiencies)
932 {
933 target_freq = clamp_val(target_freq, min, max);
934
935 if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
936 return cpufreq_table_find_index_ah(policy, target_freq,
937 efficiencies);
938 else
939 return cpufreq_table_find_index_dh(policy, target_freq,
940 efficiencies);
941 }
942
943 /* Works only on sorted freq-tables */
cpufreq_table_find_index_h(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)944 static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy,
945 unsigned int target_freq,
946 bool efficiencies)
947 {
948 return find_index_h(policy, target_freq, policy->min, policy->max, efficiencies);
949 }
950
951 /* Find closest freq to target in a table in ascending order */
cpufreq_table_find_index_ac(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)952 static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy,
953 unsigned int target_freq,
954 bool efficiencies)
955 {
956 struct cpufreq_frequency_table *table = policy->freq_table;
957 struct cpufreq_frequency_table *pos;
958 unsigned int freq;
959 int idx, best = -1;
960
961 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
962 freq = pos->frequency;
963
964 if (freq == target_freq)
965 return idx;
966
967 if (freq < target_freq) {
968 best = idx;
969 continue;
970 }
971
972 /* No freq found below target_freq */
973 if (best == -1)
974 return idx;
975
976 /* Choose the closest freq */
977 if (target_freq - table[best].frequency > freq - target_freq)
978 return idx;
979
980 return best;
981 }
982
983 return best;
984 }
985
986 /* Find closest freq to target in a table in descending order */
cpufreq_table_find_index_dc(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)987 static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy,
988 unsigned int target_freq,
989 bool efficiencies)
990 {
991 struct cpufreq_frequency_table *table = policy->freq_table;
992 struct cpufreq_frequency_table *pos;
993 unsigned int freq;
994 int idx, best = -1;
995
996 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
997 freq = pos->frequency;
998
999 if (freq == target_freq)
1000 return idx;
1001
1002 if (freq > target_freq) {
1003 best = idx;
1004 continue;
1005 }
1006
1007 /* No freq found above target_freq */
1008 if (best == -1)
1009 return idx;
1010
1011 /* Choose the closest freq */
1012 if (table[best].frequency - target_freq > target_freq - freq)
1013 return idx;
1014
1015 return best;
1016 }
1017
1018 return best;
1019 }
1020
find_index_c(struct cpufreq_policy * policy,unsigned int target_freq,unsigned int min,unsigned int max,bool efficiencies)1021 static inline int find_index_c(struct cpufreq_policy *policy,
1022 unsigned int target_freq,
1023 unsigned int min, unsigned int max,
1024 bool efficiencies)
1025 {
1026 target_freq = clamp_val(target_freq, min, max);
1027
1028 if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
1029 return cpufreq_table_find_index_ac(policy, target_freq,
1030 efficiencies);
1031 else
1032 return cpufreq_table_find_index_dc(policy, target_freq,
1033 efficiencies);
1034 }
1035
1036 /* Works only on sorted freq-tables */
cpufreq_table_find_index_c(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)1037 static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy,
1038 unsigned int target_freq,
1039 bool efficiencies)
1040 {
1041 return find_index_c(policy, target_freq, policy->min, policy->max, efficiencies);
1042 }
1043
cpufreq_is_in_limits(struct cpufreq_policy * policy,unsigned int min,unsigned int max,int idx)1044 static inline bool cpufreq_is_in_limits(struct cpufreq_policy *policy,
1045 unsigned int min, unsigned int max,
1046 int idx)
1047 {
1048 unsigned int freq;
1049
1050 if (idx < 0)
1051 return false;
1052
1053 freq = policy->freq_table[idx].frequency;
1054
1055 return freq == clamp_val(freq, min, max);
1056 }
1057
cpufreq_frequency_table_target(struct cpufreq_policy * policy,unsigned int target_freq,unsigned int min,unsigned int max,unsigned int relation)1058 static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
1059 unsigned int target_freq,
1060 unsigned int min,
1061 unsigned int max,
1062 unsigned int relation)
1063 {
1064 bool efficiencies = policy->efficiencies_available &&
1065 (relation & CPUFREQ_RELATION_E);
1066 int idx;
1067
1068 /* cpufreq_table_index_unsorted() has no use for this flag anyway */
1069 relation &= ~CPUFREQ_RELATION_E;
1070
1071 if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED))
1072 return cpufreq_table_index_unsorted(policy, target_freq, min,
1073 max, relation);
1074 retry:
1075 switch (relation) {
1076 case CPUFREQ_RELATION_L:
1077 idx = find_index_l(policy, target_freq, min, max, efficiencies);
1078 break;
1079 case CPUFREQ_RELATION_H:
1080 idx = find_index_h(policy, target_freq, min, max, efficiencies);
1081 break;
1082 case CPUFREQ_RELATION_C:
1083 idx = find_index_c(policy, target_freq, min, max, efficiencies);
1084 break;
1085 default:
1086 WARN_ON_ONCE(1);
1087 return 0;
1088 }
1089
1090 /* Limit frequency index to honor min and max */
1091 if (!cpufreq_is_in_limits(policy, min, max, idx) && efficiencies) {
1092 efficiencies = false;
1093 goto retry;
1094 }
1095
1096 return idx;
1097 }
1098
cpufreq_table_count_valid_entries(const struct cpufreq_policy * policy)1099 static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy *policy)
1100 {
1101 struct cpufreq_frequency_table *pos;
1102 int count = 0;
1103
1104 if (unlikely(!policy->freq_table))
1105 return 0;
1106
1107 cpufreq_for_each_valid_entry(pos, policy->freq_table)
1108 count++;
1109
1110 return count;
1111 }
1112
1113 /**
1114 * cpufreq_table_set_inefficient() - Mark a frequency as inefficient
1115 * @policy: the &struct cpufreq_policy containing the inefficient frequency
1116 * @frequency: the inefficient frequency
1117 *
1118 * The &struct cpufreq_policy must use a sorted frequency table
1119 *
1120 * Return: %0 on success or a negative errno code
1121 */
1122
1123 static inline int
cpufreq_table_set_inefficient(struct cpufreq_policy * policy,unsigned int frequency)1124 cpufreq_table_set_inefficient(struct cpufreq_policy *policy,
1125 unsigned int frequency)
1126 {
1127 struct cpufreq_frequency_table *pos;
1128
1129 /* Not supported */
1130 if (policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED)
1131 return -EINVAL;
1132
1133 cpufreq_for_each_valid_entry(pos, policy->freq_table) {
1134 if (pos->frequency == frequency) {
1135 pos->flags |= CPUFREQ_INEFFICIENT_FREQ;
1136 policy->efficiencies_available = true;
1137 return 0;
1138 }
1139 }
1140
1141 return -EINVAL;
1142 }
1143
parse_perf_domain(int cpu,const char * list_name,const char * cell_name,struct of_phandle_args * args)1144 static inline int parse_perf_domain(int cpu, const char *list_name,
1145 const char *cell_name,
1146 struct of_phandle_args *args)
1147 {
1148 int ret;
1149
1150 struct device_node *cpu_np __free(device_node) = of_cpu_device_node_get(cpu);
1151 if (!cpu_np)
1152 return -ENODEV;
1153
1154 ret = of_parse_phandle_with_args(cpu_np, list_name, cell_name, 0,
1155 args);
1156 if (ret < 0)
1157 return ret;
1158 return 0;
1159 }
1160
of_perf_domain_get_sharing_cpumask(int pcpu,const char * list_name,const char * cell_name,struct cpumask * cpumask,struct of_phandle_args * pargs)1161 static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name,
1162 const char *cell_name, struct cpumask *cpumask,
1163 struct of_phandle_args *pargs)
1164 {
1165 int cpu, ret;
1166 struct of_phandle_args args;
1167
1168 ret = parse_perf_domain(pcpu, list_name, cell_name, pargs);
1169 if (ret < 0)
1170 return ret;
1171
1172 cpumask_set_cpu(pcpu, cpumask);
1173
1174 for_each_possible_cpu(cpu) {
1175 if (cpu == pcpu)
1176 continue;
1177
1178 ret = parse_perf_domain(cpu, list_name, cell_name, &args);
1179 if (ret < 0)
1180 continue;
1181
1182 if (of_phandle_args_equal(pargs, &args))
1183 cpumask_set_cpu(cpu, cpumask);
1184
1185 of_node_put(args.np);
1186 }
1187
1188 return 0;
1189 }
1190 #else
cpufreq_boost_enabled(void)1191 static inline bool cpufreq_boost_enabled(void)
1192 {
1193 return false;
1194 }
1195
cpufreq_boost_set_sw(struct cpufreq_policy * policy,int state)1196 static inline int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state)
1197 {
1198 return -EOPNOTSUPP;
1199 }
1200
1201 static inline int
cpufreq_table_set_inefficient(struct cpufreq_policy * policy,unsigned int frequency)1202 cpufreq_table_set_inefficient(struct cpufreq_policy *policy,
1203 unsigned int frequency)
1204 {
1205 return -EINVAL;
1206 }
1207
of_perf_domain_get_sharing_cpumask(int pcpu,const char * list_name,const char * cell_name,struct cpumask * cpumask,struct of_phandle_args * pargs)1208 static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name,
1209 const char *cell_name, struct cpumask *cpumask,
1210 struct of_phandle_args *pargs)
1211 {
1212 return -EOPNOTSUPP;
1213 }
1214 #endif
1215
1216 extern int arch_freq_get_on_cpu(int cpu);
1217
1218 #ifndef arch_set_freq_scale
1219 static __always_inline
arch_set_freq_scale(const struct cpumask * cpus,unsigned long cur_freq,unsigned long max_freq)1220 void arch_set_freq_scale(const struct cpumask *cpus,
1221 unsigned long cur_freq,
1222 unsigned long max_freq)
1223 {
1224 }
1225 #endif
1226
1227 /* the following are really really optional */
1228 extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
1229 extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs;
1230 int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy);
1231
1232 unsigned int cpufreq_generic_get(unsigned int cpu);
1233 void cpufreq_generic_init(struct cpufreq_policy *policy,
1234 struct cpufreq_frequency_table *table,
1235 unsigned int transition_latency);
1236
1237 bool cpufreq_ready_for_eas(const struct cpumask *cpu_mask);
1238
cpufreq_register_em_with_opp(struct cpufreq_policy * policy)1239 static inline void cpufreq_register_em_with_opp(struct cpufreq_policy *policy)
1240 {
1241 dev_pm_opp_of_register_em(get_cpu_device(policy->cpu),
1242 policy->related_cpus);
1243 }
1244 #endif /* _LINUX_CPUFREQ_H */
1245