2 * linux/include/linux/cpufreq.h
4 * Copyright (C) 2001 Russell King
5 * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 #ifndef _LINUX_CPUFREQ_H
12 #define _LINUX_CPUFREQ_H
14 #include <linux/clk.h>
15 #include <linux/cpumask.h>
16 #include <linux/completion.h>
17 #include <linux/kobject.h>
18 #include <linux/notifier.h>
19 #include <linux/spinlock.h>
20 #include <linux/sysfs.h>
22 /*********************************************************************
24 *********************************************************************/
26 * Frequency values here are CPU kHz
28 * Maximum transition latency is in nanoseconds - if it's unknown,
29 * CPUFREQ_ETERNAL shall be used.
32 #define CPUFREQ_ETERNAL (-1)
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)
37 struct cpufreq_governor
;
39 enum cpufreq_table_sorting
{
40 CPUFREQ_TABLE_UNSORTED
,
41 CPUFREQ_TABLE_SORTED_ASCENDING
,
42 CPUFREQ_TABLE_SORTED_DESCENDING
45 struct cpufreq_freqs
{
46 unsigned int cpu
; /* cpu nr */
49 u8 flags
; /* flags of cpufreq_driver, see below. */
52 struct cpufreq_cpuinfo
{
53 unsigned int max_freq
;
54 unsigned int min_freq
;
56 /* in 10^(-9) s = nanoseconds */
57 unsigned int transition_latency
;
60 struct cpufreq_user_policy
{
61 unsigned int min
; /* in kHz */
62 unsigned int max
; /* in kHz */
65 struct cpufreq_policy
{
66 /* CPUs sharing clock, require sw coordination */
67 cpumask_var_t cpus
; /* Online CPUs only */
68 cpumask_var_t related_cpus
; /* Online + Offline CPUs */
69 cpumask_var_t real_cpus
; /* Related and present */
71 unsigned int shared_type
; /* ACPI: ANY or ALL affected CPUs
73 unsigned int cpu
; /* cpu managing this policy, must be online */
76 struct cpufreq_cpuinfo cpuinfo
;/* see above */
78 unsigned int min
; /* in kHz */
79 unsigned int max
; /* in kHz */
80 unsigned int cur
; /* in kHz, only needed if cpufreq
81 * governors are used */
82 unsigned int restore_freq
; /* = policy->cur before transition */
83 unsigned int suspend_freq
; /* freq to set during suspend */
85 unsigned int policy
; /* see above */
86 unsigned int last_policy
; /* policy before unplug */
87 struct cpufreq_governor
*governor
; /* see below */
89 char last_governor
[CPUFREQ_NAME_LEN
]; /* last governor used */
91 struct work_struct update
; /* if update_policy() needs to be
92 * called, but you're in IRQ context */
94 struct cpufreq_user_policy user_policy
;
95 struct cpufreq_frequency_table
*freq_table
;
96 enum cpufreq_table_sorting freq_table_sorted
;
98 struct list_head policy_list
;
100 struct completion kobj_unregister
;
103 * The rules for this semaphore:
104 * - Any routine that wants to read from the policy structure will
105 * do a down_read on this semaphore.
106 * - Any routine that will write to the policy structure and/or may take away
107 * the policy altogether (eg. CPU hotplug), will hold this lock in write
108 * mode before doing so.
110 struct rw_semaphore rwsem
;
114 * - fast_switch_possible should be set by the driver if it can
115 * guarantee that frequency can be changed on any CPU sharing the
116 * policy and that the change will affect all of the policy CPUs then.
117 * - fast_switch_enabled is to be set by governors that support fast
118 * frequency switching with the help of cpufreq_enable_fast_switch().
120 bool fast_switch_possible
;
121 bool fast_switch_enabled
;
124 * Preferred average time interval between consecutive invocations of
125 * the driver to set the frequency for this policy. To be set by the
126 * scaling driver (0, which is the default, means no preference).
128 unsigned int transition_delay_us
;
131 * Remote DVFS flag (Not added to the driver structure as we don't want
132 * to access another structure from scheduler hotpath).
134 * Should be set if CPUs can do DVFS on behalf of other CPUs from
135 * different cpufreq policies.
137 bool dvfs_possible_from_any_cpu
;
139 /* Cached frequency lookup from cpufreq_driver_resolve_freq. */
140 unsigned int cached_target_freq
;
141 int cached_resolved_idx
;
143 /* Synchronization for frequency transitions */
144 bool transition_ongoing
; /* Tracks transition status */
145 spinlock_t transition_lock
;
146 wait_queue_head_t transition_wait
;
147 struct task_struct
*transition_task
; /* Task which is doing the transition */
150 struct cpufreq_stats
*stats
;
152 /* For cpufreq driver's internal use */
155 /* Pointer to the cooling device if used for thermal mitigation */
156 struct thermal_cooling_device
*cdev
;
160 #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
161 #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */
162 #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
163 #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
165 #ifdef CONFIG_CPU_FREQ
166 struct cpufreq_policy
*cpufreq_cpu_get_raw(unsigned int cpu
);
167 struct cpufreq_policy
*cpufreq_cpu_get(unsigned int cpu
);
168 void cpufreq_cpu_put(struct cpufreq_policy
*policy
);
170 static inline struct cpufreq_policy
*cpufreq_cpu_get_raw(unsigned int cpu
)
174 static inline struct cpufreq_policy
*cpufreq_cpu_get(unsigned int cpu
)
178 static inline void cpufreq_cpu_put(struct cpufreq_policy
*policy
) { }
181 static inline bool policy_is_shared(struct cpufreq_policy
*policy
)
183 return cpumask_weight(policy
->cpus
) > 1;
186 /* /sys/devices/system/cpu/cpufreq: entry point for global variables */
187 extern struct kobject
*cpufreq_global_kobject
;
189 #ifdef CONFIG_CPU_FREQ
190 unsigned int cpufreq_get(unsigned int cpu
);
191 unsigned int cpufreq_quick_get(unsigned int cpu
);
192 unsigned int cpufreq_quick_get_max(unsigned int cpu
);
193 void disable_cpufreq(void);
195 u64
get_cpu_idle_time(unsigned int cpu
, u64
*wall
, int io_busy
);
196 int cpufreq_get_policy(struct cpufreq_policy
*policy
, unsigned int cpu
);
197 void cpufreq_update_policy(unsigned int cpu
);
198 bool have_governor_per_policy(void);
199 struct kobject
*get_governor_parent_kobj(struct cpufreq_policy
*policy
);
200 void cpufreq_enable_fast_switch(struct cpufreq_policy
*policy
);
201 void cpufreq_disable_fast_switch(struct cpufreq_policy
*policy
);
203 static inline unsigned int cpufreq_get(unsigned int cpu
)
207 static inline unsigned int cpufreq_quick_get(unsigned int cpu
)
211 static inline unsigned int cpufreq_quick_get_max(unsigned int cpu
)
215 static inline void disable_cpufreq(void) { }
218 #ifdef CONFIG_CPU_FREQ_STAT
219 void cpufreq_stats_create_table(struct cpufreq_policy
*policy
);
220 void cpufreq_stats_free_table(struct cpufreq_policy
*policy
);
221 void cpufreq_stats_record_transition(struct cpufreq_policy
*policy
,
222 unsigned int new_freq
);
224 static inline void cpufreq_stats_create_table(struct cpufreq_policy
*policy
) { }
225 static inline void cpufreq_stats_free_table(struct cpufreq_policy
*policy
) { }
226 static inline void cpufreq_stats_record_transition(struct cpufreq_policy
*policy
,
227 unsigned int new_freq
) { }
228 #endif /* CONFIG_CPU_FREQ_STAT */
230 /*********************************************************************
231 * CPUFREQ DRIVER INTERFACE *
232 *********************************************************************/
234 #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
235 #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
236 #define CPUFREQ_RELATION_C 2 /* closest frequency to target */
239 struct attribute attr
;
240 ssize_t (*show
)(struct cpufreq_policy
*, char *);
241 ssize_t (*store
)(struct cpufreq_policy
*, const char *, size_t count
);
244 #define cpufreq_freq_attr_ro(_name) \
245 static struct freq_attr _name = \
246 __ATTR(_name, 0444, show_##_name, NULL)
248 #define cpufreq_freq_attr_ro_perm(_name, _perm) \
249 static struct freq_attr _name = \
250 __ATTR(_name, _perm, show_##_name, NULL)
252 #define cpufreq_freq_attr_rw(_name) \
253 static struct freq_attr _name = \
254 __ATTR(_name, 0644, show_##_name, store_##_name)
256 #define cpufreq_freq_attr_wo(_name) \
257 static struct freq_attr _name = \
258 __ATTR(_name, 0200, NULL, store_##_name)
260 #define define_one_global_ro(_name) \
261 static struct kobj_attribute _name = \
262 __ATTR(_name, 0444, show_##_name, NULL)
264 #define define_one_global_rw(_name) \
265 static struct kobj_attribute _name = \
266 __ATTR(_name, 0644, show_##_name, store_##_name)
269 struct cpufreq_driver
{
270 char name
[CPUFREQ_NAME_LEN
];
274 /* needed by all drivers */
275 int (*init
)(struct cpufreq_policy
*policy
);
276 int (*verify
)(struct cpufreq_policy
*policy
);
278 /* define one out of two */
279 int (*setpolicy
)(struct cpufreq_policy
*policy
);
282 * On failure, should always restore frequency to policy->restore_freq
285 int (*target
)(struct cpufreq_policy
*policy
,
286 unsigned int target_freq
,
287 unsigned int relation
); /* Deprecated */
288 int (*target_index
)(struct cpufreq_policy
*policy
,
290 unsigned int (*fast_switch
)(struct cpufreq_policy
*policy
,
291 unsigned int target_freq
);
294 * Caches and returns the lowest driver-supported frequency greater than
295 * or equal to the target frequency, subject to any driver limitations.
296 * Does not set the frequency. Only to be implemented for drivers with
299 unsigned int (*resolve_freq
)(struct cpufreq_policy
*policy
,
300 unsigned int target_freq
);
303 * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION
306 * get_intermediate should return a stable intermediate frequency
307 * platform wants to switch to and target_intermediate() should set CPU
308 * to to that frequency, before jumping to the frequency corresponding
309 * to 'index'. Core will take care of sending notifications and driver
310 * doesn't have to handle them in target_intermediate() or
313 * Drivers can return '0' from get_intermediate() in case they don't
314 * wish to switch to intermediate frequency for some target frequency.
315 * In that case core will directly call ->target_index().
317 unsigned int (*get_intermediate
)(struct cpufreq_policy
*policy
,
319 int (*target_intermediate
)(struct cpufreq_policy
*policy
,
322 /* should be defined, if possible */
323 unsigned int (*get
)(unsigned int cpu
);
326 int (*bios_limit
)(int cpu
, unsigned int *limit
);
328 int (*online
)(struct cpufreq_policy
*policy
);
329 int (*offline
)(struct cpufreq_policy
*policy
);
330 int (*exit
)(struct cpufreq_policy
*policy
);
331 void (*stop_cpu
)(struct cpufreq_policy
*policy
);
332 int (*suspend
)(struct cpufreq_policy
*policy
);
333 int (*resume
)(struct cpufreq_policy
*policy
);
335 /* Will be called after the driver is fully initialized */
336 void (*ready
)(struct cpufreq_policy
*policy
);
338 struct freq_attr
**attr
;
340 /* platform specific boost support code */
342 int (*set_boost
)(int state
);
347 /* driver isn't removed even if all ->init() calls failed */
348 #define CPUFREQ_STICKY BIT(0)
350 /* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */
351 #define CPUFREQ_CONST_LOOPS BIT(1)
353 /* don't warn on suspend/resume speed mismatches */
354 #define CPUFREQ_PM_NO_WARN BIT(2)
357 * This should be set by platforms having multiple clock-domains, i.e.
358 * supporting multiple policies. With this sysfs directories of governor would
359 * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same
360 * governor with different tunables for different clusters.
362 #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3)
365 * Driver will do POSTCHANGE notifications from outside of their ->target()
366 * routine and so must set cpufreq_driver->flags with this flag, so that core
367 * can handle them specially.
369 #define CPUFREQ_ASYNC_NOTIFICATION BIT(4)
372 * Set by drivers which want cpufreq core to check if CPU is running at a
373 * frequency present in freq-table exposed by the driver. For these drivers if
374 * CPU is found running at an out of table freq, we will try to set it to a freq
375 * from the table. And if that fails, we will stop further boot process by
376 * issuing a BUG_ON().
378 #define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5)
381 * Set by drivers to disallow use of governors with "dynamic_switching" flag
384 #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6)
387 * Set by drivers that want the core to automatically register the cpufreq
388 * driver as a thermal cooling device.
390 #define CPUFREQ_IS_COOLING_DEV BIT(7)
392 int cpufreq_register_driver(struct cpufreq_driver
*driver_data
);
393 int cpufreq_unregister_driver(struct cpufreq_driver
*driver_data
);
395 const char *cpufreq_get_current_driver(void);
396 void *cpufreq_get_driver_data(void);
398 static inline void cpufreq_verify_within_limits(struct cpufreq_policy
*policy
,
399 unsigned int min
, unsigned int max
)
401 if (policy
->min
< min
)
403 if (policy
->max
< min
)
405 if (policy
->min
> max
)
407 if (policy
->max
> max
)
409 if (policy
->min
> policy
->max
)
410 policy
->min
= policy
->max
;
415 cpufreq_verify_within_cpu_limits(struct cpufreq_policy
*policy
)
417 cpufreq_verify_within_limits(policy
, policy
->cpuinfo
.min_freq
,
418 policy
->cpuinfo
.max_freq
);
421 #ifdef CONFIG_CPU_FREQ
422 void cpufreq_suspend(void);
423 void cpufreq_resume(void);
424 int cpufreq_generic_suspend(struct cpufreq_policy
*policy
);
426 static inline void cpufreq_suspend(void) {}
427 static inline void cpufreq_resume(void) {}
430 /*********************************************************************
431 * CPUFREQ NOTIFIER INTERFACE *
432 *********************************************************************/
434 #define CPUFREQ_TRANSITION_NOTIFIER (0)
435 #define CPUFREQ_POLICY_NOTIFIER (1)
437 /* Transition notifiers */
438 #define CPUFREQ_PRECHANGE (0)
439 #define CPUFREQ_POSTCHANGE (1)
441 /* Policy Notifiers */
442 #define CPUFREQ_ADJUST (0)
443 #define CPUFREQ_NOTIFY (1)
445 #ifdef CONFIG_CPU_FREQ
446 int cpufreq_register_notifier(struct notifier_block
*nb
, unsigned int list
);
447 int cpufreq_unregister_notifier(struct notifier_block
*nb
, unsigned int list
);
449 void cpufreq_freq_transition_begin(struct cpufreq_policy
*policy
,
450 struct cpufreq_freqs
*freqs
);
451 void cpufreq_freq_transition_end(struct cpufreq_policy
*policy
,
452 struct cpufreq_freqs
*freqs
, int transition_failed
);
454 #else /* CONFIG_CPU_FREQ */
455 static inline int cpufreq_register_notifier(struct notifier_block
*nb
,
460 static inline int cpufreq_unregister_notifier(struct notifier_block
*nb
,
465 #endif /* !CONFIG_CPU_FREQ */
468 * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
475 * new = old * mult / div
477 static inline unsigned long cpufreq_scale(unsigned long old
, u_int div
,
480 #if BITS_PER_LONG == 32
481 u64 result
= ((u64
) old
) * ((u64
) mult
);
483 return (unsigned long) result
;
485 #elif BITS_PER_LONG == 64
486 unsigned long result
= old
* ((u64
) mult
);
492 /*********************************************************************
493 * CPUFREQ GOVERNORS *
494 *********************************************************************/
497 * If (cpufreq_driver->target) exists, the ->governor decides what frequency
498 * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
499 * two generic policies are available:
501 #define CPUFREQ_POLICY_POWERSAVE (1)
502 #define CPUFREQ_POLICY_PERFORMANCE (2)
505 * The polling frequency depends on the capability of the processor. Default
506 * polling frequency is 1000 times the transition latency of the processor. The
507 * ondemand governor will work on any processor with transition latency <= 10ms,
508 * using appropriate sampling rate.
510 #define LATENCY_MULTIPLIER (1000)
512 struct cpufreq_governor
{
513 char name
[CPUFREQ_NAME_LEN
];
514 int (*init
)(struct cpufreq_policy
*policy
);
515 void (*exit
)(struct cpufreq_policy
*policy
);
516 int (*start
)(struct cpufreq_policy
*policy
);
517 void (*stop
)(struct cpufreq_policy
*policy
);
518 void (*limits
)(struct cpufreq_policy
*policy
);
519 ssize_t (*show_setspeed
) (struct cpufreq_policy
*policy
,
521 int (*store_setspeed
) (struct cpufreq_policy
*policy
,
523 /* For governors which change frequency dynamically by themselves */
524 bool dynamic_switching
;
525 struct list_head governor_list
;
526 struct module
*owner
;
529 /* Pass a target to the cpufreq driver */
530 unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy
*policy
,
531 unsigned int target_freq
);
532 int cpufreq_driver_target(struct cpufreq_policy
*policy
,
533 unsigned int target_freq
,
534 unsigned int relation
);
535 int __cpufreq_driver_target(struct cpufreq_policy
*policy
,
536 unsigned int target_freq
,
537 unsigned int relation
);
538 unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy
*policy
,
539 unsigned int target_freq
);
540 unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy
*policy
);
541 int cpufreq_register_governor(struct cpufreq_governor
*governor
);
542 void cpufreq_unregister_governor(struct cpufreq_governor
*governor
);
544 struct cpufreq_governor
*cpufreq_default_governor(void);
545 struct cpufreq_governor
*cpufreq_fallback_governor(void);
547 static inline void cpufreq_policy_apply_limits(struct cpufreq_policy
*policy
)
549 if (policy
->max
< policy
->cur
)
550 __cpufreq_driver_target(policy
, policy
->max
, CPUFREQ_RELATION_H
);
551 else if (policy
->min
> policy
->cur
)
552 __cpufreq_driver_target(policy
, policy
->min
, CPUFREQ_RELATION_L
);
555 /* Governor attribute set */
556 struct gov_attr_set
{
558 struct list_head policy_list
;
559 struct mutex update_lock
;
563 /* sysfs ops for cpufreq governors */
564 extern const struct sysfs_ops governor_sysfs_ops
;
566 void gov_attr_set_init(struct gov_attr_set
*attr_set
, struct list_head
*list_node
);
567 void gov_attr_set_get(struct gov_attr_set
*attr_set
, struct list_head
*list_node
);
568 unsigned int gov_attr_set_put(struct gov_attr_set
*attr_set
, struct list_head
*list_node
);
570 /* Governor sysfs attribute */
571 struct governor_attr
{
572 struct attribute attr
;
573 ssize_t (*show
)(struct gov_attr_set
*attr_set
, char *buf
);
574 ssize_t (*store
)(struct gov_attr_set
*attr_set
, const char *buf
,
578 static inline bool cpufreq_this_cpu_can_update(struct cpufreq_policy
*policy
)
581 * Allow remote callbacks if:
582 * - dvfs_possible_from_any_cpu flag is set
583 * - the local and remote CPUs share cpufreq policy
585 return policy
->dvfs_possible_from_any_cpu
||
586 cpumask_test_cpu(smp_processor_id(), policy
->cpus
);
589 /*********************************************************************
590 * FREQUENCY TABLE HELPERS *
591 *********************************************************************/
593 /* Special Values of .frequency field */
594 #define CPUFREQ_ENTRY_INVALID ~0u
595 #define CPUFREQ_TABLE_END ~1u
596 /* Special Values of .flags field */
597 #define CPUFREQ_BOOST_FREQ (1 << 0)
599 struct cpufreq_frequency_table
{
601 unsigned int driver_data
; /* driver specific data, not used by core */
602 unsigned int frequency
; /* kHz - doesn't need to be in ascending
606 #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
607 int dev_pm_opp_init_cpufreq_table(struct device
*dev
,
608 struct cpufreq_frequency_table
**table
);
609 void dev_pm_opp_free_cpufreq_table(struct device
*dev
,
610 struct cpufreq_frequency_table
**table
);
612 static inline int dev_pm_opp_init_cpufreq_table(struct device
*dev
,
613 struct cpufreq_frequency_table
619 static inline void dev_pm_opp_free_cpufreq_table(struct device
*dev
,
620 struct cpufreq_frequency_table
627 * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table
628 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
629 * @table: the cpufreq_frequency_table * to iterate over.
632 #define cpufreq_for_each_entry(pos, table) \
633 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++)
636 * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table
638 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
639 * @table: the cpufreq_frequency_table * to iterate over.
640 * @idx: the table entry currently being processed
643 #define cpufreq_for_each_entry_idx(pos, table, idx) \
644 for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \
648 * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table
649 * excluding CPUFREQ_ENTRY_INVALID frequencies.
650 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
651 * @table: the cpufreq_frequency_table * to iterate over.
654 #define cpufreq_for_each_valid_entry(pos, table) \
655 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \
656 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
661 * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq
662 * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies.
663 * @pos: the cpufreq_frequency_table * to use as a loop cursor.
664 * @table: the cpufreq_frequency_table * to iterate over.
665 * @idx: the table entry currently being processed
668 #define cpufreq_for_each_valid_entry_idx(pos, table, idx) \
669 cpufreq_for_each_entry_idx(pos, table, idx) \
670 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \
675 int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy
*policy
,
676 struct cpufreq_frequency_table
*table
);
678 int cpufreq_frequency_table_verify(struct cpufreq_policy
*policy
,
679 struct cpufreq_frequency_table
*table
);
680 int cpufreq_generic_frequency_table_verify(struct cpufreq_policy
*policy
);
682 int cpufreq_table_index_unsorted(struct cpufreq_policy
*policy
,
683 unsigned int target_freq
,
684 unsigned int relation
);
685 int cpufreq_frequency_table_get_index(struct cpufreq_policy
*policy
,
688 ssize_t
cpufreq_show_cpus(const struct cpumask
*mask
, char *buf
);
690 #ifdef CONFIG_CPU_FREQ
691 int cpufreq_boost_trigger_state(int state
);
692 int cpufreq_boost_enabled(void);
693 int cpufreq_enable_boost_support(void);
694 bool policy_has_boost_freq(struct cpufreq_policy
*policy
);
696 /* Find lowest freq at or above target in a table in ascending order */
697 static inline int cpufreq_table_find_index_al(struct cpufreq_policy
*policy
,
698 unsigned int target_freq
)
700 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
701 struct cpufreq_frequency_table
*pos
;
705 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
706 freq
= pos
->frequency
;
708 if (freq
>= target_freq
)
717 /* Find lowest freq at or above target in a table in descending order */
718 static inline int cpufreq_table_find_index_dl(struct cpufreq_policy
*policy
,
719 unsigned int target_freq
)
721 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
722 struct cpufreq_frequency_table
*pos
;
726 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
727 freq
= pos
->frequency
;
729 if (freq
== target_freq
)
732 if (freq
> target_freq
) {
737 /* No freq found above target_freq */
747 /* Works only on sorted freq-tables */
748 static inline int cpufreq_table_find_index_l(struct cpufreq_policy
*policy
,
749 unsigned int target_freq
)
751 target_freq
= clamp_val(target_freq
, policy
->min
, policy
->max
);
753 if (policy
->freq_table_sorted
== CPUFREQ_TABLE_SORTED_ASCENDING
)
754 return cpufreq_table_find_index_al(policy
, target_freq
);
756 return cpufreq_table_find_index_dl(policy
, target_freq
);
759 /* Find highest freq at or below target in a table in ascending order */
760 static inline int cpufreq_table_find_index_ah(struct cpufreq_policy
*policy
,
761 unsigned int target_freq
)
763 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
764 struct cpufreq_frequency_table
*pos
;
768 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
769 freq
= pos
->frequency
;
771 if (freq
== target_freq
)
774 if (freq
< target_freq
) {
779 /* No freq found below target_freq */
789 /* Find highest freq at or below target in a table in descending order */
790 static inline int cpufreq_table_find_index_dh(struct cpufreq_policy
*policy
,
791 unsigned int target_freq
)
793 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
794 struct cpufreq_frequency_table
*pos
;
798 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
799 freq
= pos
->frequency
;
801 if (freq
<= target_freq
)
810 /* Works only on sorted freq-tables */
811 static inline int cpufreq_table_find_index_h(struct cpufreq_policy
*policy
,
812 unsigned int target_freq
)
814 target_freq
= clamp_val(target_freq
, policy
->min
, policy
->max
);
816 if (policy
->freq_table_sorted
== CPUFREQ_TABLE_SORTED_ASCENDING
)
817 return cpufreq_table_find_index_ah(policy
, target_freq
);
819 return cpufreq_table_find_index_dh(policy
, target_freq
);
822 /* Find closest freq to target in a table in ascending order */
823 static inline int cpufreq_table_find_index_ac(struct cpufreq_policy
*policy
,
824 unsigned int target_freq
)
826 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
827 struct cpufreq_frequency_table
*pos
;
831 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
832 freq
= pos
->frequency
;
834 if (freq
== target_freq
)
837 if (freq
< target_freq
) {
842 /* No freq found below target_freq */
846 /* Choose the closest freq */
847 if (target_freq
- table
[best
].frequency
> freq
- target_freq
)
856 /* Find closest freq to target in a table in descending order */
857 static inline int cpufreq_table_find_index_dc(struct cpufreq_policy
*policy
,
858 unsigned int target_freq
)
860 struct cpufreq_frequency_table
*table
= policy
->freq_table
;
861 struct cpufreq_frequency_table
*pos
;
865 cpufreq_for_each_valid_entry_idx(pos
, table
, idx
) {
866 freq
= pos
->frequency
;
868 if (freq
== target_freq
)
871 if (freq
> target_freq
) {
876 /* No freq found above target_freq */
880 /* Choose the closest freq */
881 if (table
[best
].frequency
- target_freq
> target_freq
- freq
)
890 /* Works only on sorted freq-tables */
891 static inline int cpufreq_table_find_index_c(struct cpufreq_policy
*policy
,
892 unsigned int target_freq
)
894 target_freq
= clamp_val(target_freq
, policy
->min
, policy
->max
);
896 if (policy
->freq_table_sorted
== CPUFREQ_TABLE_SORTED_ASCENDING
)
897 return cpufreq_table_find_index_ac(policy
, target_freq
);
899 return cpufreq_table_find_index_dc(policy
, target_freq
);
902 static inline int cpufreq_frequency_table_target(struct cpufreq_policy
*policy
,
903 unsigned int target_freq
,
904 unsigned int relation
)
906 if (unlikely(policy
->freq_table_sorted
== CPUFREQ_TABLE_UNSORTED
))
907 return cpufreq_table_index_unsorted(policy
, target_freq
,
911 case CPUFREQ_RELATION_L
:
912 return cpufreq_table_find_index_l(policy
, target_freq
);
913 case CPUFREQ_RELATION_H
:
914 return cpufreq_table_find_index_h(policy
, target_freq
);
915 case CPUFREQ_RELATION_C
:
916 return cpufreq_table_find_index_c(policy
, target_freq
);
918 pr_err("%s: Invalid relation: %d\n", __func__
, relation
);
923 static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy
*policy
)
925 struct cpufreq_frequency_table
*pos
;
928 if (unlikely(!policy
->freq_table
))
931 cpufreq_for_each_valid_entry(pos
, policy
->freq_table
)
937 static inline int cpufreq_boost_trigger_state(int state
)
941 static inline int cpufreq_boost_enabled(void)
946 static inline int cpufreq_enable_boost_support(void)
951 static inline bool policy_has_boost_freq(struct cpufreq_policy
*policy
)
957 #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
958 void sched_cpufreq_governor_change(struct cpufreq_policy
*policy
,
959 struct cpufreq_governor
*old_gov
);
961 static inline void sched_cpufreq_governor_change(struct cpufreq_policy
*policy
,
962 struct cpufreq_governor
*old_gov
) { }
965 extern void arch_freq_prepare_all(void);
966 extern unsigned int arch_freq_get_on_cpu(int cpu
);
968 extern void arch_set_freq_scale(struct cpumask
*cpus
, unsigned long cur_freq
,
969 unsigned long max_freq
);
971 /* the following are really really optional */
972 extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs
;
973 extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs
;
974 extern struct freq_attr
*cpufreq_generic_attr
[];
975 int cpufreq_table_validate_and_sort(struct cpufreq_policy
*policy
);
977 unsigned int cpufreq_generic_get(unsigned int cpu
);
978 int cpufreq_generic_init(struct cpufreq_policy
*policy
,
979 struct cpufreq_frequency_table
*table
,
980 unsigned int transition_latency
);
981 #endif /* _LINUX_CPUFREQ_H */