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 struct freq_qos_request boost_freq_req;
85
86 struct cpufreq_frequency_table *freq_table;
87 enum cpufreq_table_sorting freq_table_sorted;
88
89 struct list_head policy_list;
90 struct kobject kobj;
91 struct completion kobj_unregister;
92
93 /*
94 * The rules for this semaphore:
95 * - Any routine that wants to read from the policy structure will
96 * do a down_read on this semaphore.
97 * - Any routine that will write to the policy structure and/or may take away
98 * the policy altogether (eg. CPU hotplug), will hold this lock in write
99 * mode before doing so.
100 */
101 struct rw_semaphore rwsem;
102
103 /*
104 * Fast switch flags:
105 * - fast_switch_possible should be set by the driver if it can
106 * guarantee that frequency can be changed on any CPU sharing the
107 * policy and that the change will affect all of the policy CPUs then.
108 * - fast_switch_enabled is to be set by governors that support fast
109 * frequency switching with the help of cpufreq_enable_fast_switch().
110 */
111 bool fast_switch_possible;
112 bool fast_switch_enabled;
113
114 /*
115 * Set if the CPUFREQ_GOV_STRICT_TARGET flag is set for the current
116 * governor.
117 */
118 bool strict_target;
119
120 /*
121 * Set if inefficient frequencies were found in the frequency table.
122 * This indicates if the relation flag CPUFREQ_RELATION_E can be
123 * honored.
124 */
125 bool efficiencies_available;
126
127 /*
128 * Preferred average time interval between consecutive invocations of
129 * the driver to set the frequency for this policy. To be set by the
130 * scaling driver (0, which is the default, means no preference).
131 */
132 unsigned int transition_delay_us;
133
134 /*
135 * Remote DVFS flag (Not added to the driver structure as we don't want
136 * to access another structure from scheduler hotpath).
137 *
138 * Should be set if CPUs can do DVFS on behalf of other CPUs from
139 * different cpufreq policies.
140 */
141 bool dvfs_possible_from_any_cpu;
142
143 /* Per policy boost enabled flag. */
144 bool boost_enabled;
145
146 /* Per policy boost supported flag. */
147 bool boost_supported;
148
149 /* Cached frequency lookup from cpufreq_driver_resolve_freq. */
150 unsigned int cached_target_freq;
151 unsigned int cached_resolved_idx;
152
153 /* Synchronization for frequency transitions */
154 bool transition_ongoing; /* Tracks transition status */
155 spinlock_t transition_lock;
156 wait_queue_head_t transition_wait;
157 struct task_struct *transition_task; /* Task which is doing the transition */
158
159 /* cpufreq-stats */
160 struct cpufreq_stats *stats;
161
162 /* For cpufreq driver's internal use */
163 void *driver_data;
164
165 /* Pointer to the cooling device if used for thermal mitigation */
166 struct thermal_cooling_device *cdev;
167
168 struct notifier_block nb_min;
169 struct notifier_block nb_max;
170 };
171
172 DEFINE_GUARD(cpufreq_policy_write, struct cpufreq_policy *,
173 down_write(&_T->rwsem), up_write(&_T->rwsem))
174
175 DEFINE_GUARD(cpufreq_policy_read, struct cpufreq_policy *,
176 down_read(&_T->rwsem), up_read(&_T->rwsem))
177
178 /*
179 * Used for passing new cpufreq policy data to the cpufreq driver's ->verify()
180 * callback for sanitization. That callback is only expected to modify the min
181 * and max values, if necessary, and specifically it must not update the
182 * frequency table.
183 */
184 struct cpufreq_policy_data {
185 struct cpufreq_cpuinfo cpuinfo;
186 struct cpufreq_frequency_table *freq_table;
187 unsigned int cpu;
188 unsigned int min; /* in kHz */
189 unsigned int max; /* in kHz */
190 };
191
192 struct cpufreq_freqs {
193 struct cpufreq_policy *policy;
194 unsigned int old;
195 unsigned int new;
196 u8 flags; /* flags of cpufreq_driver, see below. */
197 };
198
199 /* Only for ACPI */
200 #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
201 #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */
202 #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
203 #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
204
205 #ifdef CONFIG_CPU_FREQ
206 struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu);
207 struct cpufreq_policy *cpufreq_cpu_policy(unsigned int cpu);
208 struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
209 void cpufreq_cpu_put(struct cpufreq_policy *policy);
210 #else
cpufreq_cpu_get_raw(unsigned int cpu)211 static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu)
212 {
213 return NULL;
214 }
cpufreq_cpu_policy(unsigned int cpu)215 static inline struct cpufreq_policy *cpufreq_cpu_policy(unsigned int cpu)
216 {
217 return NULL;
218 }
cpufreq_cpu_get(unsigned int cpu)219 static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
220 {
221 return NULL;
222 }
cpufreq_cpu_put(struct cpufreq_policy * policy)223 static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { }
224 #endif
225
226 /* Scope based cleanup macro for cpufreq_policy kobject reference counting */
DEFINE_FREE(put_cpufreq_policy,struct cpufreq_policy *,if (_T)cpufreq_cpu_put (_T))227 DEFINE_FREE(put_cpufreq_policy, struct cpufreq_policy *, if (_T) cpufreq_cpu_put(_T))
228
229 static inline bool policy_is_inactive(struct cpufreq_policy *policy)
230 {
231 return cpumask_empty(policy->cpus);
232 }
233
policy_is_shared(struct cpufreq_policy * policy)234 static inline bool policy_is_shared(struct cpufreq_policy *policy)
235 {
236 return cpumask_nth(1, policy->cpus) < nr_cpumask_bits;
237 }
238
239 #ifdef CONFIG_CPU_FREQ
240 unsigned int cpufreq_get(unsigned int cpu);
241 unsigned int cpufreq_quick_get(unsigned int cpu);
242 unsigned int cpufreq_quick_get_max(unsigned int cpu);
243 unsigned int cpufreq_get_hw_max_freq(unsigned int cpu);
244 void disable_cpufreq(void);
245
246 u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
247
248 void refresh_frequency_limits(struct cpufreq_policy *policy);
249 void cpufreq_update_policy(unsigned int cpu);
250 void cpufreq_update_limits(unsigned int cpu);
251 bool have_governor_per_policy(void);
252 bool cpufreq_supports_freq_invariance(void);
253 struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
254 void cpufreq_enable_fast_switch(struct cpufreq_policy *policy);
255 void cpufreq_disable_fast_switch(struct cpufreq_policy *policy);
256 bool has_target_index(void);
257
258 DECLARE_PER_CPU(unsigned long, cpufreq_pressure);
cpufreq_get_pressure(int cpu)259 static inline unsigned long cpufreq_get_pressure(int cpu)
260 {
261 return READ_ONCE(per_cpu(cpufreq_pressure, cpu));
262 }
263 #else
cpufreq_get(unsigned int cpu)264 static inline unsigned int cpufreq_get(unsigned int cpu)
265 {
266 return 0;
267 }
cpufreq_quick_get(unsigned int cpu)268 static inline unsigned int cpufreq_quick_get(unsigned int cpu)
269 {
270 return 0;
271 }
cpufreq_quick_get_max(unsigned int cpu)272 static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
273 {
274 return 0;
275 }
cpufreq_get_hw_max_freq(unsigned int cpu)276 static inline unsigned int cpufreq_get_hw_max_freq(unsigned int cpu)
277 {
278 return 0;
279 }
cpufreq_supports_freq_invariance(void)280 static inline bool cpufreq_supports_freq_invariance(void)
281 {
282 return false;
283 }
disable_cpufreq(void)284 static inline void disable_cpufreq(void) { }
cpufreq_update_limits(unsigned int cpu)285 static inline void cpufreq_update_limits(unsigned int cpu) { }
cpufreq_get_pressure(int cpu)286 static inline unsigned long cpufreq_get_pressure(int cpu)
287 {
288 return 0;
289 }
290 #endif
291
292 #ifdef CONFIG_CPU_FREQ_STAT
293 void cpufreq_stats_create_table(struct cpufreq_policy *policy);
294 void cpufreq_stats_free_table(struct cpufreq_policy *policy);
295 void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
296 unsigned int new_freq);
297 #else
cpufreq_stats_create_table(struct cpufreq_policy * policy)298 static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { }
cpufreq_stats_free_table(struct cpufreq_policy * policy)299 static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { }
cpufreq_stats_record_transition(struct cpufreq_policy * policy,unsigned int new_freq)300 static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
301 unsigned int new_freq) { }
302 #endif /* CONFIG_CPU_FREQ_STAT */
303
304 /*********************************************************************
305 * CPUFREQ DRIVER INTERFACE *
306 *********************************************************************/
307
308 #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
309 #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
310 #define CPUFREQ_RELATION_C 2 /* closest frequency to target */
311 /* relation flags */
312 #define CPUFREQ_RELATION_E BIT(2) /* Get if possible an efficient frequency */
313
314 #define CPUFREQ_RELATION_LE (CPUFREQ_RELATION_L | CPUFREQ_RELATION_E)
315 #define CPUFREQ_RELATION_HE (CPUFREQ_RELATION_H | CPUFREQ_RELATION_E)
316 #define CPUFREQ_RELATION_CE (CPUFREQ_RELATION_C | CPUFREQ_RELATION_E)
317
318 struct freq_attr {
319 struct attribute attr;
320 ssize_t (*show)(struct cpufreq_policy *, char *);
321 ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
322 };
323
324 #define cpufreq_freq_attr_ro(_name) \
325 static struct freq_attr _name = \
326 __ATTR(_name, 0444, show_##_name, NULL)
327
328 #define cpufreq_freq_attr_ro_perm(_name, _perm) \
329 static struct freq_attr _name = \
330 __ATTR(_name, _perm, show_##_name, NULL)
331
332 #define cpufreq_freq_attr_rw(_name) \
333 static struct freq_attr _name = \
334 __ATTR(_name, 0644, show_##_name, store_##_name)
335
336 #define cpufreq_freq_attr_wo(_name) \
337 static struct freq_attr _name = \
338 __ATTR(_name, 0200, NULL, store_##_name)
339
340 #define define_one_global_ro(_name) \
341 static struct kobj_attribute _name = \
342 __ATTR(_name, 0444, show_##_name, NULL)
343
344 #define define_one_global_rw(_name) \
345 static struct kobj_attribute _name = \
346 __ATTR(_name, 0644, show_##_name, store_##_name)
347
348
349 struct cpufreq_driver {
350 char name[CPUFREQ_NAME_LEN];
351 u16 flags;
352 void *driver_data;
353
354 /* needed by all drivers */
355 int (*init)(struct cpufreq_policy *policy);
356 int (*verify)(struct cpufreq_policy_data *policy);
357
358 /* define one out of two */
359 int (*setpolicy)(struct cpufreq_policy *policy);
360
361 int (*target)(struct cpufreq_policy *policy,
362 unsigned int target_freq,
363 unsigned int relation); /* Deprecated */
364 int (*target_index)(struct cpufreq_policy *policy,
365 unsigned int index);
366 unsigned int (*fast_switch)(struct cpufreq_policy *policy,
367 unsigned int target_freq);
368 /*
369 * ->fast_switch() replacement for drivers that use an internal
370 * representation of performance levels and can pass hints other than
371 * the target performance level to the hardware. This can only be set
372 * if ->fast_switch is set too, because in those cases (under specific
373 * conditions) scale invariance can be disabled, which causes the
374 * schedutil governor to fall back to the latter.
375 */
376 void (*adjust_perf)(struct cpufreq_policy *policy,
377 unsigned long min_perf,
378 unsigned long target_perf,
379 unsigned long capacity);
380
381 /*
382 * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION
383 * unset.
384 *
385 * get_intermediate should return a stable intermediate frequency
386 * platform wants to switch to and target_intermediate() should set CPU
387 * to that frequency, before jumping to the frequency corresponding
388 * to 'index'. Core will take care of sending notifications and driver
389 * doesn't have to handle them in target_intermediate() or
390 * target_index().
391 *
392 * Drivers can return '0' from get_intermediate() in case they don't
393 * wish to switch to intermediate frequency for some target frequency.
394 * In that case core will directly call ->target_index().
395 */
396 unsigned int (*get_intermediate)(struct cpufreq_policy *policy,
397 unsigned int index);
398 int (*target_intermediate)(struct cpufreq_policy *policy,
399 unsigned int index);
400
401 /* should be defined, if possible, return 0 on error */
402 unsigned int (*get)(unsigned int cpu);
403
404 /* Called to update policy limits on firmware notifications. */
405 void (*update_limits)(struct cpufreq_policy *policy);
406
407 /* optional */
408 int (*bios_limit)(int cpu, unsigned int *limit);
409
410 int (*online)(struct cpufreq_policy *policy);
411 int (*offline)(struct cpufreq_policy *policy);
412 void (*exit)(struct cpufreq_policy *policy);
413 int (*suspend)(struct cpufreq_policy *policy);
414 int (*resume)(struct cpufreq_policy *policy);
415
416 /* Will be called after the driver is fully initialized */
417 void (*ready)(struct cpufreq_policy *policy);
418
419 struct freq_attr **attr;
420
421 /* platform specific boost support code */
422 bool boost_enabled;
423 int (*set_boost)(struct cpufreq_policy *policy, int state);
424
425 /*
426 * Set by drivers that want to register with the energy model after the
427 * policy is properly initialized, but before the governor is started.
428 */
429 void (*register_em)(struct cpufreq_policy *policy);
430 };
431
432 /* flags */
433
434 /*
435 * Set by drivers that need to update internal upper and lower boundaries along
436 * with the target frequency and so the core and governors should also invoke
437 * the diver if the target frequency does not change, but the policy min or max
438 * may have changed.
439 */
440 #define CPUFREQ_NEED_UPDATE_LIMITS BIT(0)
441
442 /* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */
443 #define CPUFREQ_CONST_LOOPS BIT(1)
444
445 /*
446 * Set by drivers that want the core to automatically register the cpufreq
447 * driver as a thermal cooling device.
448 */
449 #define CPUFREQ_IS_COOLING_DEV BIT(2)
450
451 /*
452 * This should be set by platforms having multiple clock-domains, i.e.
453 * supporting multiple policies. With this sysfs directories of governor would
454 * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same
455 * governor with different tunables for different clusters.
456 */
457 #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3)
458
459 /*
460 * Driver will do POSTCHANGE notifications from outside of their ->target()
461 * routine and so must set cpufreq_driver->flags with this flag, so that core
462 * can handle them specially.
463 */
464 #define CPUFREQ_ASYNC_NOTIFICATION BIT(4)
465
466 /*
467 * Set by drivers which want cpufreq core to check if CPU is running at a
468 * frequency present in freq-table exposed by the driver. For these drivers if
469 * CPU is found running at an out of table freq, we will try to set it to a freq
470 * from the table. And if that fails, we will stop further boot process by
471 * issuing a BUG_ON().
472 */
473 #define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5)
474
475 /*
476 * Set by drivers to disallow use of governors with "dynamic_switching" flag
477 * set.
478 */
479 #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6)
480
481 int cpufreq_register_driver(struct cpufreq_driver *driver_data);
482 void cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
483
484 bool cpufreq_driver_test_flags(u16 flags);
485 const char *cpufreq_get_current_driver(void);
486 void *cpufreq_get_driver_data(void);
487
cpufreq_thermal_control_enabled(struct cpufreq_driver * drv)488 static inline int cpufreq_thermal_control_enabled(struct cpufreq_driver *drv)
489 {
490 return IS_ENABLED(CONFIG_CPU_THERMAL) &&
491 (drv->flags & CPUFREQ_IS_COOLING_DEV);
492 }
493
cpufreq_verify_within_limits(struct cpufreq_policy_data * policy,unsigned int min,unsigned int max)494 static inline void cpufreq_verify_within_limits(struct cpufreq_policy_data *policy,
495 unsigned int min,
496 unsigned int max)
497 {
498 policy->max = clamp(policy->max, min, max);
499 policy->min = clamp(policy->min, min, policy->max);
500 }
501
502 static inline void
cpufreq_verify_within_cpu_limits(struct cpufreq_policy_data * policy)503 cpufreq_verify_within_cpu_limits(struct cpufreq_policy_data *policy)
504 {
505 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
506 policy->cpuinfo.max_freq);
507 }
508
509 #ifdef CONFIG_CPU_FREQ
510 void cpufreq_suspend(void);
511 void cpufreq_resume(void);
512 int cpufreq_generic_suspend(struct cpufreq_policy *policy);
513 #else
cpufreq_suspend(void)514 static inline void cpufreq_suspend(void) {}
cpufreq_resume(void)515 static inline void cpufreq_resume(void) {}
516 #endif
517
518 /*********************************************************************
519 * CPUFREQ NOTIFIER INTERFACE *
520 *********************************************************************/
521
522 #define CPUFREQ_TRANSITION_NOTIFIER (0)
523 #define CPUFREQ_POLICY_NOTIFIER (1)
524
525 /* Transition notifiers */
526 #define CPUFREQ_PRECHANGE (0)
527 #define CPUFREQ_POSTCHANGE (1)
528
529 /* Policy Notifiers */
530 #define CPUFREQ_CREATE_POLICY (0)
531 #define CPUFREQ_REMOVE_POLICY (1)
532
533 #ifdef CONFIG_CPU_FREQ
534 int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
535 int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
536
537 void cpufreq_freq_transition_begin(struct cpufreq_policy *policy,
538 struct cpufreq_freqs *freqs);
539 void cpufreq_freq_transition_end(struct cpufreq_policy *policy,
540 struct cpufreq_freqs *freqs, int transition_failed);
541
542 #else /* CONFIG_CPU_FREQ */
cpufreq_register_notifier(struct notifier_block * nb,unsigned int list)543 static inline int cpufreq_register_notifier(struct notifier_block *nb,
544 unsigned int list)
545 {
546 return 0;
547 }
cpufreq_unregister_notifier(struct notifier_block * nb,unsigned int list)548 static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
549 unsigned int list)
550 {
551 return 0;
552 }
553 #endif /* !CONFIG_CPU_FREQ */
554
555 /**
556 * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
557 * safe)
558 * @old: old value
559 * @div: divisor
560 * @mult: multiplier
561 *
562 *
563 * new = old * mult / div
564 */
cpufreq_scale(unsigned long old,u_int div,u_int mult)565 static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
566 u_int mult)
567 {
568 #if BITS_PER_LONG == 32
569 u64 result = ((u64) old) * ((u64) mult);
570 do_div(result, div);
571 return (unsigned long) result;
572
573 #elif BITS_PER_LONG == 64
574 unsigned long result = old * ((u64) mult);
575 result /= div;
576 return result;
577 #endif
578 }
579
580 /*********************************************************************
581 * CPUFREQ GOVERNORS *
582 *********************************************************************/
583
584 #define CPUFREQ_POLICY_UNKNOWN (0)
585 /*
586 * If (cpufreq_driver->target) exists, the ->governor decides what frequency
587 * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
588 * two generic policies are available:
589 */
590 #define CPUFREQ_POLICY_POWERSAVE (1)
591 #define CPUFREQ_POLICY_PERFORMANCE (2)
592
593 struct cpufreq_governor {
594 char name[CPUFREQ_NAME_LEN];
595 int (*init)(struct cpufreq_policy *policy);
596 void (*exit)(struct cpufreq_policy *policy);
597 int (*start)(struct cpufreq_policy *policy);
598 void (*stop)(struct cpufreq_policy *policy);
599 void (*limits)(struct cpufreq_policy *policy);
600 ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
601 char *buf);
602 int (*store_setspeed) (struct cpufreq_policy *policy,
603 unsigned int freq);
604 struct list_head governor_list;
605 struct module *owner;
606 u8 flags;
607 };
608
609 /* Governor flags */
610
611 /* For governors which change frequency dynamically by themselves */
612 #define CPUFREQ_GOV_DYNAMIC_SWITCHING BIT(0)
613
614 /* For governors wanting the target frequency to be set exactly */
615 #define CPUFREQ_GOV_STRICT_TARGET BIT(1)
616
617
618 /* Pass a target to the cpufreq driver */
619 unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy,
620 unsigned int target_freq);
621 void cpufreq_driver_adjust_perf(struct cpufreq_policy *policy,
622 unsigned long min_perf,
623 unsigned long target_perf,
624 unsigned long capacity);
625 bool cpufreq_driver_has_adjust_perf(void);
626 int cpufreq_driver_target(struct cpufreq_policy *policy,
627 unsigned int target_freq,
628 unsigned int relation);
629 int __cpufreq_driver_target(struct cpufreq_policy *policy,
630 unsigned int target_freq,
631 unsigned int relation);
632 unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
633 unsigned int target_freq);
634 unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy);
635 int cpufreq_register_governor(struct cpufreq_governor *governor);
636 void cpufreq_unregister_governor(struct cpufreq_governor *governor);
637 int cpufreq_start_governor(struct cpufreq_policy *policy);
638 void cpufreq_stop_governor(struct cpufreq_policy *policy);
639
640 #define cpufreq_governor_init(__governor) \
641 static int __init __governor##_init(void) \
642 { \
643 return cpufreq_register_governor(&__governor); \
644 } \
645 core_initcall(__governor##_init)
646
647 #define cpufreq_governor_exit(__governor) \
648 static void __exit __governor##_exit(void) \
649 { \
650 return cpufreq_unregister_governor(&__governor); \
651 } \
652 module_exit(__governor##_exit)
653
654 struct cpufreq_governor *cpufreq_default_governor(void);
655 struct cpufreq_governor *cpufreq_fallback_governor(void);
656
657 #ifdef CONFIG_CPU_FREQ_GOV_SCHEDUTIL
658 bool sugov_is_governor(struct cpufreq_policy *policy);
659 #else
sugov_is_governor(struct cpufreq_policy * policy)660 static inline bool sugov_is_governor(struct cpufreq_policy *policy)
661 {
662 return false;
663 }
664 #endif
665
cpufreq_policy_apply_limits(struct cpufreq_policy * policy)666 static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy)
667 {
668 if (policy->max < policy->cur)
669 __cpufreq_driver_target(policy, policy->max,
670 CPUFREQ_RELATION_HE);
671 else if (policy->min > policy->cur)
672 __cpufreq_driver_target(policy, policy->min,
673 CPUFREQ_RELATION_LE);
674 }
675
676 /* Governor attribute set */
677 struct gov_attr_set {
678 struct kobject kobj;
679 struct list_head policy_list;
680 struct mutex update_lock;
681 int usage_count;
682 };
683
684 /* sysfs ops for cpufreq governors */
685 extern const struct sysfs_ops governor_sysfs_ops;
686
to_gov_attr_set(struct kobject * kobj)687 static inline struct gov_attr_set *to_gov_attr_set(struct kobject *kobj)
688 {
689 return container_of(kobj, struct gov_attr_set, kobj);
690 }
691
692 void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node);
693 void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node);
694 unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node);
695
696 /* Governor sysfs attribute */
697 struct governor_attr {
698 struct attribute attr;
699 ssize_t (*show)(struct gov_attr_set *attr_set, char *buf);
700 ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf,
701 size_t count);
702 };
703
704 /*********************************************************************
705 * FREQUENCY TABLE HELPERS *
706 *********************************************************************/
707
708 /* Special Values of .frequency field */
709 #define CPUFREQ_ENTRY_INVALID ~0u
710 #define CPUFREQ_TABLE_END ~1u
711 /* Special Values of .flags field */
712 #define CPUFREQ_BOOST_FREQ (1 << 0)
713 #define CPUFREQ_INEFFICIENT_FREQ (1 << 1)
714
715 struct cpufreq_frequency_table {
716 unsigned int flags;
717 unsigned int driver_data; /* driver specific data, not used by core */
718 unsigned int frequency; /* kHz - doesn't need to be in ascending
719 * order */
720 };
721
722 /*
723 * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table
724 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
725 * @table: the cpufreq_frequency_table * to iterate over.
726 */
727
728 #define cpufreq_for_each_entry(pos, table) \
729 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++)
730
731 /*
732 * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table
733 * with index
734 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
735 * @table: the cpufreq_frequency_table * to iterate over.
736 * @idx: the table entry currently being processed
737 */
738
739 #define cpufreq_for_each_entry_idx(pos, table, idx) \
740 for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \
741 pos++, idx++)
742
743 /*
744 * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table
745 * excluding CPUFREQ_ENTRY_INVALID frequencies.
746 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
747 * @table: the cpufreq_frequency_table * to iterate over.
748 */
749
750 #define cpufreq_for_each_valid_entry(pos, table) \
751 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \
752 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
753 continue; \
754 else
755
756 /*
757 * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq
758 * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies.
759 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
760 * @table: the cpufreq_frequency_table * to iterate over.
761 * @idx: the table entry currently being processed
762 */
763
764 #define cpufreq_for_each_valid_entry_idx(pos, table, idx) \
765 cpufreq_for_each_entry_idx(pos, table, idx) \
766 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
767 continue; \
768 else
769
770 /**
771 * cpufreq_for_each_efficient_entry_idx - iterate with index over a cpufreq
772 * frequency_table excluding CPUFREQ_ENTRY_INVALID and
773 * CPUFREQ_INEFFICIENT_FREQ frequencies.
774 * @pos: the &struct cpufreq_frequency_table to use as a loop cursor.
775 * @table: the &struct cpufreq_frequency_table to iterate over.
776 * @idx: the table entry currently being processed.
777 * @efficiencies: set to true to only iterate over efficient frequencies.
778 */
779
780 #define cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) \
781 cpufreq_for_each_valid_entry_idx(pos, table, idx) \
782 if (efficiencies && (pos->flags & CPUFREQ_INEFFICIENT_FREQ)) \
783 continue; \
784 else
785
786
787 int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy);
788
789 int cpufreq_frequency_table_verify(struct cpufreq_policy_data *policy);
790
791 int cpufreq_generic_frequency_table_verify(struct cpufreq_policy_data *policy);
792
793 int cpufreq_table_index_unsorted(struct cpufreq_policy *policy,
794 unsigned int target_freq, unsigned int min,
795 unsigned int max, unsigned int relation);
796 int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
797 unsigned int freq);
798
799 ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
800
801 #ifdef CONFIG_CPU_FREQ
802 bool cpufreq_boost_enabled(void);
803 int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state);
804
805 /* 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)806 static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy,
807 unsigned int target_freq,
808 bool efficiencies)
809 {
810 struct cpufreq_frequency_table *table = policy->freq_table;
811 struct cpufreq_frequency_table *pos;
812 unsigned int freq;
813 int idx, best = -1;
814
815 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
816 freq = pos->frequency;
817
818 if (freq >= target_freq)
819 return idx;
820
821 best = idx;
822 }
823
824 return best;
825 }
826
827 /* 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)828 static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy,
829 unsigned int target_freq,
830 bool efficiencies)
831 {
832 struct cpufreq_frequency_table *table = policy->freq_table;
833 struct cpufreq_frequency_table *pos;
834 unsigned int freq;
835 int idx, best = -1;
836
837 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
838 freq = pos->frequency;
839
840 if (freq == target_freq)
841 return idx;
842
843 if (freq > target_freq) {
844 best = idx;
845 continue;
846 }
847
848 /* No freq found above target_freq */
849 if (best == -1)
850 return idx;
851
852 return best;
853 }
854
855 return best;
856 }
857
find_index_l(struct cpufreq_policy * policy,unsigned int target_freq,unsigned int min,unsigned int max,bool efficiencies)858 static inline int find_index_l(struct cpufreq_policy *policy,
859 unsigned int target_freq,
860 unsigned int min, unsigned int max,
861 bool efficiencies)
862 {
863 target_freq = clamp_val(target_freq, min, max);
864
865 if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
866 return cpufreq_table_find_index_al(policy, target_freq,
867 efficiencies);
868 else
869 return cpufreq_table_find_index_dl(policy, target_freq,
870 efficiencies);
871 }
872
873 /* Works only on sorted freq-tables */
cpufreq_table_find_index_l(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)874 static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy,
875 unsigned int target_freq,
876 bool efficiencies)
877 {
878 return find_index_l(policy, target_freq, policy->min, policy->max, efficiencies);
879 }
880
881 /* 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)882 static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy,
883 unsigned int target_freq,
884 bool efficiencies)
885 {
886 struct cpufreq_frequency_table *table = policy->freq_table;
887 struct cpufreq_frequency_table *pos;
888 unsigned int freq;
889 int idx, best = -1;
890
891 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
892 freq = pos->frequency;
893
894 if (freq == target_freq)
895 return idx;
896
897 if (freq < target_freq) {
898 best = idx;
899 continue;
900 }
901
902 /* No freq found below target_freq */
903 if (best == -1)
904 return idx;
905
906 return best;
907 }
908
909 return best;
910 }
911
912 /* 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)913 static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy,
914 unsigned int target_freq,
915 bool efficiencies)
916 {
917 struct cpufreq_frequency_table *table = policy->freq_table;
918 struct cpufreq_frequency_table *pos;
919 unsigned int freq;
920 int idx, best = -1;
921
922 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
923 freq = pos->frequency;
924
925 if (freq <= target_freq)
926 return idx;
927
928 best = idx;
929 }
930
931 return best;
932 }
933
find_index_h(struct cpufreq_policy * policy,unsigned int target_freq,unsigned int min,unsigned int max,bool efficiencies)934 static inline int find_index_h(struct cpufreq_policy *policy,
935 unsigned int target_freq,
936 unsigned int min, unsigned int max,
937 bool efficiencies)
938 {
939 target_freq = clamp_val(target_freq, min, max);
940
941 if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
942 return cpufreq_table_find_index_ah(policy, target_freq,
943 efficiencies);
944 else
945 return cpufreq_table_find_index_dh(policy, target_freq,
946 efficiencies);
947 }
948
949 /* Works only on sorted freq-tables */
cpufreq_table_find_index_h(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)950 static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy,
951 unsigned int target_freq,
952 bool efficiencies)
953 {
954 return find_index_h(policy, target_freq, policy->min, policy->max, efficiencies);
955 }
956
957 /* 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)958 static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy,
959 unsigned int target_freq,
960 bool efficiencies)
961 {
962 struct cpufreq_frequency_table *table = policy->freq_table;
963 struct cpufreq_frequency_table *pos;
964 unsigned int freq;
965 int idx, best = -1;
966
967 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
968 freq = pos->frequency;
969
970 if (freq == target_freq)
971 return idx;
972
973 if (freq < target_freq) {
974 best = idx;
975 continue;
976 }
977
978 /* No freq found below target_freq */
979 if (best == -1)
980 return idx;
981
982 /* Choose the closest freq */
983 if (target_freq - table[best].frequency > freq - target_freq)
984 return idx;
985
986 return best;
987 }
988
989 return best;
990 }
991
992 /* 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)993 static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy,
994 unsigned int target_freq,
995 bool efficiencies)
996 {
997 struct cpufreq_frequency_table *table = policy->freq_table;
998 struct cpufreq_frequency_table *pos;
999 unsigned int freq;
1000 int idx, best = -1;
1001
1002 cpufreq_for_each_efficient_entry_idx(pos, table, idx, efficiencies) {
1003 freq = pos->frequency;
1004
1005 if (freq == target_freq)
1006 return idx;
1007
1008 if (freq > target_freq) {
1009 best = idx;
1010 continue;
1011 }
1012
1013 /* No freq found above target_freq */
1014 if (best == -1)
1015 return idx;
1016
1017 /* Choose the closest freq */
1018 if (table[best].frequency - target_freq > target_freq - freq)
1019 return idx;
1020
1021 return best;
1022 }
1023
1024 return best;
1025 }
1026
find_index_c(struct cpufreq_policy * policy,unsigned int target_freq,unsigned int min,unsigned int max,bool efficiencies)1027 static inline int find_index_c(struct cpufreq_policy *policy,
1028 unsigned int target_freq,
1029 unsigned int min, unsigned int max,
1030 bool efficiencies)
1031 {
1032 target_freq = clamp_val(target_freq, min, max);
1033
1034 if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING)
1035 return cpufreq_table_find_index_ac(policy, target_freq,
1036 efficiencies);
1037 else
1038 return cpufreq_table_find_index_dc(policy, target_freq,
1039 efficiencies);
1040 }
1041
1042 /* Works only on sorted freq-tables */
cpufreq_table_find_index_c(struct cpufreq_policy * policy,unsigned int target_freq,bool efficiencies)1043 static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy,
1044 unsigned int target_freq,
1045 bool efficiencies)
1046 {
1047 return find_index_c(policy, target_freq, policy->min, policy->max, efficiencies);
1048 }
1049
cpufreq_is_in_limits(struct cpufreq_policy * policy,unsigned int min,unsigned int max,int idx)1050 static inline bool cpufreq_is_in_limits(struct cpufreq_policy *policy,
1051 unsigned int min, unsigned int max,
1052 int idx)
1053 {
1054 unsigned int freq;
1055
1056 if (idx < 0)
1057 return false;
1058
1059 freq = policy->freq_table[idx].frequency;
1060
1061 return freq == clamp_val(freq, min, max);
1062 }
1063
cpufreq_frequency_table_target(struct cpufreq_policy * policy,unsigned int target_freq,unsigned int min,unsigned int max,unsigned int relation)1064 static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
1065 unsigned int target_freq,
1066 unsigned int min,
1067 unsigned int max,
1068 unsigned int relation)
1069 {
1070 bool efficiencies = policy->efficiencies_available &&
1071 (relation & CPUFREQ_RELATION_E);
1072 int idx;
1073
1074 /* cpufreq_table_index_unsorted() has no use for this flag anyway */
1075 relation &= ~CPUFREQ_RELATION_E;
1076
1077 if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED))
1078 return cpufreq_table_index_unsorted(policy, target_freq, min,
1079 max, relation);
1080 retry:
1081 switch (relation) {
1082 case CPUFREQ_RELATION_L:
1083 idx = find_index_l(policy, target_freq, min, max, efficiencies);
1084 break;
1085 case CPUFREQ_RELATION_H:
1086 idx = find_index_h(policy, target_freq, min, max, efficiencies);
1087 break;
1088 case CPUFREQ_RELATION_C:
1089 idx = find_index_c(policy, target_freq, min, max, efficiencies);
1090 break;
1091 default:
1092 WARN_ON_ONCE(1);
1093 return 0;
1094 }
1095
1096 /* Limit frequency index to honor min and max */
1097 if (!cpufreq_is_in_limits(policy, min, max, idx) && efficiencies) {
1098 efficiencies = false;
1099 goto retry;
1100 }
1101
1102 return idx;
1103 }
1104
cpufreq_table_count_valid_entries(const struct cpufreq_policy * policy)1105 static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy *policy)
1106 {
1107 struct cpufreq_frequency_table *pos;
1108 int count = 0;
1109
1110 if (unlikely(!policy->freq_table))
1111 return 0;
1112
1113 cpufreq_for_each_valid_entry(pos, policy->freq_table)
1114 count++;
1115
1116 return count;
1117 }
1118
1119 /**
1120 * cpufreq_table_set_inefficient() - Mark a frequency as inefficient
1121 * @policy: the &struct cpufreq_policy containing the inefficient frequency
1122 * @frequency: the inefficient frequency
1123 *
1124 * The &struct cpufreq_policy must use a sorted frequency table
1125 *
1126 * Return: %0 on success or a negative errno code
1127 */
1128
1129 static inline int
cpufreq_table_set_inefficient(struct cpufreq_policy * policy,unsigned int frequency)1130 cpufreq_table_set_inefficient(struct cpufreq_policy *policy,
1131 unsigned int frequency)
1132 {
1133 struct cpufreq_frequency_table *pos;
1134
1135 /* Not supported */
1136 if (policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED)
1137 return -EINVAL;
1138
1139 cpufreq_for_each_valid_entry(pos, policy->freq_table) {
1140 if (pos->frequency == frequency) {
1141 pos->flags |= CPUFREQ_INEFFICIENT_FREQ;
1142 policy->efficiencies_available = true;
1143 return 0;
1144 }
1145 }
1146
1147 return -EINVAL;
1148 }
1149
parse_perf_domain(int cpu,const char * list_name,const char * cell_name,struct of_phandle_args * args)1150 static inline int parse_perf_domain(int cpu, const char *list_name,
1151 const char *cell_name,
1152 struct of_phandle_args *args)
1153 {
1154 int ret;
1155
1156 struct device_node *cpu_np __free(device_node) = of_cpu_device_node_get(cpu);
1157 if (!cpu_np)
1158 return -ENODEV;
1159
1160 ret = of_parse_phandle_with_args(cpu_np, list_name, cell_name, 0,
1161 args);
1162 if (ret < 0)
1163 return ret;
1164 return 0;
1165 }
1166
of_perf_domain_get_sharing_cpumask(int pcpu,const char * list_name,const char * cell_name,struct cpumask * cpumask,struct of_phandle_args * pargs)1167 static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name,
1168 const char *cell_name, struct cpumask *cpumask,
1169 struct of_phandle_args *pargs)
1170 {
1171 int cpu, ret;
1172 struct of_phandle_args args;
1173
1174 ret = parse_perf_domain(pcpu, list_name, cell_name, pargs);
1175 if (ret < 0)
1176 return ret;
1177
1178 cpumask_set_cpu(pcpu, cpumask);
1179
1180 for_each_possible_cpu(cpu) {
1181 if (cpu == pcpu)
1182 continue;
1183
1184 ret = parse_perf_domain(cpu, list_name, cell_name, &args);
1185 if (ret < 0)
1186 continue;
1187
1188 if (of_phandle_args_equal(pargs, &args))
1189 cpumask_set_cpu(cpu, cpumask);
1190
1191 of_node_put(args.np);
1192 }
1193
1194 return 0;
1195 }
1196 #else
cpufreq_boost_enabled(void)1197 static inline bool cpufreq_boost_enabled(void)
1198 {
1199 return false;
1200 }
1201
cpufreq_boost_set_sw(struct cpufreq_policy * policy,int state)1202 static inline int cpufreq_boost_set_sw(struct cpufreq_policy *policy, int state)
1203 {
1204 return -EOPNOTSUPP;
1205 }
1206
1207 static inline int
cpufreq_table_set_inefficient(struct cpufreq_policy * policy,unsigned int frequency)1208 cpufreq_table_set_inefficient(struct cpufreq_policy *policy,
1209 unsigned int frequency)
1210 {
1211 return -EINVAL;
1212 }
1213
of_perf_domain_get_sharing_cpumask(int pcpu,const char * list_name,const char * cell_name,struct cpumask * cpumask,struct of_phandle_args * pargs)1214 static inline int of_perf_domain_get_sharing_cpumask(int pcpu, const char *list_name,
1215 const char *cell_name, struct cpumask *cpumask,
1216 struct of_phandle_args *pargs)
1217 {
1218 return -EOPNOTSUPP;
1219 }
1220 #endif
1221
1222 extern int arch_freq_get_on_cpu(int cpu);
1223
1224 #ifndef arch_set_freq_scale
1225 static __always_inline
arch_set_freq_scale(const struct cpumask * cpus,unsigned long cur_freq,unsigned long max_freq)1226 void arch_set_freq_scale(const struct cpumask *cpus,
1227 unsigned long cur_freq,
1228 unsigned long max_freq)
1229 {
1230 }
1231 #endif
1232
1233 /* the following are really really optional */
1234 extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
1235 extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs;
1236 int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy);
1237
1238 unsigned int cpufreq_generic_get(unsigned int cpu);
1239 void cpufreq_generic_init(struct cpufreq_policy *policy,
1240 struct cpufreq_frequency_table *table,
1241 unsigned int transition_latency);
1242
1243 bool cpufreq_ready_for_eas(const struct cpumask *cpu_mask);
1244
cpufreq_register_em_with_opp(struct cpufreq_policy * policy)1245 static inline void cpufreq_register_em_with_opp(struct cpufreq_policy *policy)
1246 {
1247 dev_pm_opp_of_register_em(get_cpu_device(policy->cpu),
1248 policy->related_cpus);
1249 }
1250 #endif /* _LINUX_CPUFREQ_H */
1251