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