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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Viresh Kumarbb176f72013-06-19 14:19:33 +05302 * linux/include/linux/cpufreq.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
Viresh Kumarbb176f72013-06-19 14:19:33 +05304 * Copyright (C) 2001 Russell King
5 * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
Thiago Farina335dc332011-04-28 20:42:53 -03006 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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.
10 */
11#ifndef _LINUX_CPUFREQ_H
12#define _LINUX_CPUFREQ_H
13
Viresh Kumar652ed952014-01-09 20:38:43 +053014#include <linux/clk.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/cpumask.h>
Viresh Kumar5ff0a262013-08-06 22:53:03 +053016#include <linux/completion.h>
17#include <linux/kobject.h>
18#include <linux/notifier.h>
19#include <linux/sysfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
Linus Torvalds1da177e2005-04-16 15:20:36 -070021/*********************************************************************
Viresh Kumar74aca952013-08-06 22:53:04 +053022 * CPUFREQ INTERFACE *
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 *********************************************************************/
Viresh Kumar74aca952013-08-06 22:53:04 +053024/*
25 * Frequency values here are CPU kHz
26 *
Dave Jonesb53cc6e2005-05-31 19:03:47 -070027 * Maximum transition latency is in nanoseconds - if it's unknown,
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 * CPUFREQ_ETERNAL shall be used.
29 */
30
Viresh Kumar74aca952013-08-06 22:53:04 +053031#define CPUFREQ_ETERNAL (-1)
32#define CPUFREQ_NAME_LEN 16
33/* Print length for names. Extra 1 space for accomodating '\n' in prints */
34#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
35
Linus Torvalds1da177e2005-04-16 15:20:36 -070036struct cpufreq_governor;
37
Viresh Kumar74aca952013-08-06 22:53:04 +053038struct cpufreq_freqs {
39 unsigned int cpu; /* cpu nr */
40 unsigned int old;
41 unsigned int new;
42 u8 flags; /* flags of cpufreq_driver, see below. */
43};
Thomas Renninger8aa84ad2009-07-24 15:25:05 +020044
Linus Torvalds1da177e2005-04-16 15:20:36 -070045struct cpufreq_cpuinfo {
46 unsigned int max_freq;
47 unsigned int min_freq;
Thiago Farina335dc332011-04-28 20:42:53 -030048
49 /* in 10^(-9) s = nanoseconds */
50 unsigned int transition_latency;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051};
52
53struct cpufreq_real_policy {
54 unsigned int min; /* in kHz */
55 unsigned int max; /* in kHz */
Thiago Farina335dc332011-04-28 20:42:53 -030056 unsigned int policy; /* see above */
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 struct cpufreq_governor *governor; /* see below */
58};
59
60struct cpufreq_policy {
Viresh Kumar951fc5f2013-01-31 02:03:53 +000061 /* CPUs sharing clock, require sw coordination */
62 cpumask_var_t cpus; /* Online CPUs only */
63 cpumask_var_t related_cpus; /* Online + Offline CPUs */
64
Viresh Kumar62b36cc2013-02-01 06:40:02 +000065 unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs
Venkatesh Pallipadi3b2d9942005-12-14 15:05:00 -050066 should set cpufreq */
Viresh Kumarb8eed8a2013-01-14 13:23:03 +000067 unsigned int cpu; /* cpu nr of CPU managing this policy */
68 unsigned int last_cpu; /* cpu nr of previous CPU that managed
69 * this policy */
Viresh Kumar652ed952014-01-09 20:38:43 +053070 struct clk *clk;
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 struct cpufreq_cpuinfo cpuinfo;/* see above */
72
73 unsigned int min; /* in kHz */
74 unsigned int max; /* in kHz */
75 unsigned int cur; /* in kHz, only needed if cpufreq
76 * governors are used */
Thiago Farina335dc332011-04-28 20:42:53 -030077 unsigned int policy; /* see above */
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 struct cpufreq_governor *governor; /* see below */
Viresh Kumar7bd353a2013-03-27 15:58:57 +000079 void *governor_data;
Xiaoguang Chen95731eb2013-06-19 15:00:07 +080080 bool governor_enabled; /* governor start/stop flag */
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 struct work_struct update; /* if update_policy() needs to be
83 * called, but you're in IRQ context */
84
85 struct cpufreq_real_policy user_policy;
86
Lukasz Majewskic88a1f82013-08-06 22:53:08 +053087 struct list_head policy_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 struct kobject kobj;
89 struct completion kobj_unregister;
viresh kumarad7722d2013-10-18 19:10:15 +053090
91 /*
92 * The rules for this semaphore:
93 * - Any routine that wants to read from the policy structure will
94 * do a down_read on this semaphore.
95 * - Any routine that will write to the policy structure and/or may take away
96 * the policy altogether (eg. CPU hotplug), will hold this lock in write
97 * mode before doing so.
98 *
99 * Additional rules:
100 * - Lock should not be held across
101 * __cpufreq_governor(data, CPUFREQ_GOV_POLICY_EXIT);
102 */
103 struct rw_semaphore rwsem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104};
105
Viresh Kumar62b36cc2013-02-01 06:40:02 +0000106/* Only for ACPI */
Venkatesh Pallipadi46f18e32006-06-26 00:34:43 -0400107#define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
108#define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */
109#define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
110#define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
Daniel Vetterc75b5052013-10-08 10:56:11 +0200112#ifdef CONFIG_CPU_FREQ
Viresh Kumar74aca952013-08-06 22:53:04 +0530113struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
Viresh Kumar3a3e9e02013-08-06 22:53:05 +0530114void cpufreq_cpu_put(struct cpufreq_policy *policy);
Daniel Vetterc75b5052013-10-08 10:56:11 +0200115#else
116static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
117{
118 return NULL;
119}
120static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { }
121#endif
Viresh Kumar74aca952013-08-06 22:53:04 +0530122
Fabio Baltieri2624f902013-01-31 09:44:40 +0000123static inline bool policy_is_shared(struct cpufreq_policy *policy)
124{
125 return cpumask_weight(policy->cpus) > 1;
126}
127
Viresh Kumar74aca952013-08-06 22:53:04 +0530128/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
129extern struct kobject *cpufreq_global_kobject;
130int cpufreq_get_global_kobject(void);
131void cpufreq_put_global_kobject(void);
132int cpufreq_sysfs_create_file(const struct attribute *attr);
133void cpufreq_sysfs_remove_file(const struct attribute *attr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Viresh Kumar74aca952013-08-06 22:53:04 +0530135#ifdef CONFIG_CPU_FREQ
136unsigned int cpufreq_get(unsigned int cpu);
137unsigned int cpufreq_quick_get(unsigned int cpu);
138unsigned int cpufreq_quick_get_max(unsigned int cpu);
139void disable_cpufreq(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
Viresh Kumar74aca952013-08-06 22:53:04 +0530141u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
142int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
143int cpufreq_update_policy(unsigned int cpu);
144bool have_governor_per_policy(void);
145struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
146#else
147static inline unsigned int cpufreq_get(unsigned int cpu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148{
Viresh Kumar74aca952013-08-06 22:53:04 +0530149 return 0;
150}
151static inline unsigned int cpufreq_quick_get(unsigned int cpu)
152{
153 return 0;
154}
155static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
156{
157 return 0;
158}
159static inline void disable_cpufreq(void) { }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162/*********************************************************************
163 * CPUFREQ DRIVER INTERFACE *
164 *********************************************************************/
165
166#define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
167#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
168
Viresh Kumar74aca952013-08-06 22:53:04 +0530169struct freq_attr {
170 struct attribute attr;
171 ssize_t (*show)(struct cpufreq_policy *, char *);
172 ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
173};
174
175#define cpufreq_freq_attr_ro(_name) \
176static struct freq_attr _name = \
177__ATTR(_name, 0444, show_##_name, NULL)
178
179#define cpufreq_freq_attr_ro_perm(_name, _perm) \
180static struct freq_attr _name = \
181__ATTR(_name, _perm, show_##_name, NULL)
182
183#define cpufreq_freq_attr_rw(_name) \
184static struct freq_attr _name = \
185__ATTR(_name, 0644, show_##_name, store_##_name)
186
187struct global_attr {
188 struct attribute attr;
189 ssize_t (*show)(struct kobject *kobj,
190 struct attribute *attr, char *buf);
191 ssize_t (*store)(struct kobject *a, struct attribute *b,
192 const char *c, size_t count);
193};
194
195#define define_one_global_ro(_name) \
196static struct global_attr _name = \
197__ATTR(_name, 0444, show_##_name, NULL)
198
199#define define_one_global_rw(_name) \
200static struct global_attr _name = \
201__ATTR(_name, 0644, show_##_name, store_##_name)
202
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
204struct cpufreq_driver {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 char name[CPUFREQ_NAME_LEN];
206 u8 flags;
207
208 /* needed by all drivers */
209 int (*init) (struct cpufreq_policy *policy);
210 int (*verify) (struct cpufreq_policy *policy);
211
212 /* define one out of two */
213 int (*setpolicy) (struct cpufreq_policy *policy);
Viresh Kumar9c0ebcf2013-10-25 19:45:48 +0530214 int (*target) (struct cpufreq_policy *policy, /* Deprecated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 unsigned int target_freq,
216 unsigned int relation);
Viresh Kumar9c0ebcf2013-10-25 19:45:48 +0530217 int (*target_index) (struct cpufreq_policy *policy,
218 unsigned int index);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
220 /* should be defined, if possible */
221 unsigned int (*get) (unsigned int cpu);
222
223 /* optional */
Thomas Renningere2f74f32009-11-19 12:31:01 +0100224 int (*bios_limit) (int cpu, unsigned int *limit);
venkatesh.pallipadi@intel.combf0b90e2008-08-04 11:59:07 -0700225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 int (*exit) (struct cpufreq_policy *policy);
Rafael J. Wysocki7ca64e22011-03-10 21:13:05 +0100227 int (*suspend) (struct cpufreq_policy *policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 int (*resume) (struct cpufreq_policy *policy);
229 struct freq_attr **attr;
Lukasz Majewski6f19efc2013-12-20 15:24:49 +0100230
231 /* platform specific boost support code */
232 bool boost_supported;
233 bool boost_enabled;
234 int (*set_boost) (int state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235};
236
237/* flags */
Viresh Kumar6461f012013-10-02 14:13:17 +0530238#define CPUFREQ_STICKY (1 << 0) /* driver isn't removed even if
239 all ->init() calls failed */
240#define CPUFREQ_CONST_LOOPS (1 << 1) /* loops_per_jiffy or other
241 kernel "constants" aren't
242 affected by frequency
243 transitions */
244#define CPUFREQ_PM_NO_WARN (1 << 2) /* don't warn on suspend/resume
245 speed mismatches */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Viresh Kumar0b981e72013-10-02 14:13:18 +0530247/*
248 * This should be set by platforms having multiple clock-domains, i.e.
249 * supporting multiple policies. With this sysfs directories of governor would
250 * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same
251 * governor with different tunables for different clusters.
252 */
253#define CPUFREQ_HAVE_GOVERNOR_PER_POLICY (1 << 3)
254
Viresh Kumar7dbf6942013-10-29 18:56:06 +0530255/*
256 * Driver will do POSTCHANGE notifications from outside of their ->target()
257 * routine and so must set cpufreq_driver->flags with this flag, so that core
258 * can handle them specially.
259 */
260#define CPUFREQ_ASYNC_NOTIFICATION (1 << 4)
261
Viresh Kumarae6b4272013-12-03 11:20:45 +0530262/*
263 * Set by drivers which want cpufreq core to check if CPU is running at a
264 * frequency present in freq-table exposed by the driver. For these drivers if
265 * CPU is found running at an out of table freq, we will try to set it to a freq
266 * from the table. And if that fails, we will stop further boot process by
267 * issuing a BUG_ON().
268 */
269#define CPUFREQ_NEED_INITIAL_FREQ_CHECK (1 << 5)
270
Linus Torvalds221dee22007-02-26 14:55:48 -0800271int cpufreq_register_driver(struct cpufreq_driver *driver_data);
272int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
Viresh Kumar74aca952013-08-06 22:53:04 +0530274const char *cpufreq_get_current_driver(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
Viresh Kumarbb176f72013-06-19 14:19:33 +0530276static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
277 unsigned int min, unsigned int max)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278{
279 if (policy->min < min)
280 policy->min = min;
281 if (policy->max < min)
282 policy->max = min;
283 if (policy->min > max)
284 policy->min = max;
285 if (policy->max > max)
286 policy->max = max;
287 if (policy->min > policy->max)
288 policy->min = policy->max;
289 return;
290}
291
Viresh Kumarbe49e342013-10-02 14:13:19 +0530292static inline void
293cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy)
294{
295 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
296 policy->cpuinfo.max_freq);
297}
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299/*********************************************************************
Viresh Kumar74aca952013-08-06 22:53:04 +0530300 * CPUFREQ NOTIFIER INTERFACE *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 *********************************************************************/
302
Viresh Kumar74aca952013-08-06 22:53:04 +0530303#define CPUFREQ_TRANSITION_NOTIFIER (0)
304#define CPUFREQ_POLICY_NOTIFIER (1)
305
306/* Transition notifiers */
307#define CPUFREQ_PRECHANGE (0)
308#define CPUFREQ_POSTCHANGE (1)
309#define CPUFREQ_RESUMECHANGE (8)
310#define CPUFREQ_SUSPENDCHANGE (9)
311
312/* Policy Notifiers */
313#define CPUFREQ_ADJUST (0)
314#define CPUFREQ_INCOMPATIBLE (1)
315#define CPUFREQ_NOTIFY (2)
316#define CPUFREQ_START (3)
317#define CPUFREQ_UPDATE_POLICY_CPU (4)
Viresh Kumarfcd7af92014-01-07 07:10:10 +0530318#define CPUFREQ_CREATE_POLICY (5)
319#define CPUFREQ_REMOVE_POLICY (6)
Viresh Kumar74aca952013-08-06 22:53:04 +0530320
321#ifdef CONFIG_CPU_FREQ
322int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
323int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
324
325void cpufreq_notify_transition(struct cpufreq_policy *policy,
326 struct cpufreq_freqs *freqs, unsigned int state);
Viresh Kumarf7ba3b42013-12-02 11:04:12 +0530327void cpufreq_notify_post_transition(struct cpufreq_policy *policy,
328 struct cpufreq_freqs *freqs, int transition_failed);
Viresh Kumar74aca952013-08-06 22:53:04 +0530329
330#else /* CONFIG_CPU_FREQ */
331static inline int cpufreq_register_notifier(struct notifier_block *nb,
332 unsigned int list)
333{
334 return 0;
335}
336static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
337 unsigned int list)
338{
339 return 0;
340}
341#endif /* !CONFIG_CPU_FREQ */
342
343/**
344 * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
345 * safe)
346 * @old: old value
347 * @div: divisor
348 * @mult: multiplier
349 *
350 *
351 * new = old * mult / div
352 */
353static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
354 u_int mult)
355{
356#if BITS_PER_LONG == 32
357 u64 result = ((u64) old) * ((u64) mult);
358 do_div(result, div);
359 return (unsigned long) result;
360
361#elif BITS_PER_LONG == 64
362 unsigned long result = old * ((u64) mult);
363 result /= div;
364 return result;
365#endif
366}
367
368/*********************************************************************
369 * CPUFREQ GOVERNORS *
370 *********************************************************************/
371
372/*
373 * If (cpufreq_driver->target) exists, the ->governor decides what frequency
374 * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
375 * two generic policies are available:
376 */
377#define CPUFREQ_POLICY_POWERSAVE (1)
378#define CPUFREQ_POLICY_PERFORMANCE (2)
379
380/* Governor Events */
381#define CPUFREQ_GOV_START 1
382#define CPUFREQ_GOV_STOP 2
383#define CPUFREQ_GOV_LIMITS 3
384#define CPUFREQ_GOV_POLICY_INIT 4
385#define CPUFREQ_GOV_POLICY_EXIT 5
386
387struct cpufreq_governor {
388 char name[CPUFREQ_NAME_LEN];
389 int initialized;
390 int (*governor) (struct cpufreq_policy *policy,
391 unsigned int event);
392 ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
393 char *buf);
394 int (*store_setspeed) (struct cpufreq_policy *policy,
395 unsigned int freq);
396 unsigned int max_transition_latency; /* HW must be able to switch to
397 next freq faster than this value in nano secs or we
398 will fallback to performance governor */
399 struct list_head governor_list;
400 struct module *owner;
401};
402
403/* Pass a target to the cpufreq driver */
404int cpufreq_driver_target(struct cpufreq_policy *policy,
405 unsigned int target_freq,
406 unsigned int relation);
407int __cpufreq_driver_target(struct cpufreq_policy *policy,
408 unsigned int target_freq,
409 unsigned int relation);
410int cpufreq_register_governor(struct cpufreq_governor *governor);
411void cpufreq_unregister_governor(struct cpufreq_governor *governor);
412
413/* CPUFREQ DEFAULT GOVERNOR */
Thomas Renninger1c256242007-10-02 13:28:12 -0700414/*
Viresh Kumarbb176f72013-06-19 14:19:33 +0530415 * Performance governor is fallback governor if any other gov failed to auto
416 * load due latency restrictions
417 */
Thomas Renninger6afde102007-10-02 13:28:13 -0700418#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419extern struct cpufreq_governor cpufreq_gov_performance;
Thomas Renninger6afde102007-10-02 13:28:13 -0700420#endif
Thomas Renninger1c256242007-10-02 13:28:12 -0700421#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
422#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance)
Alessandro Guido30d221d2008-04-18 13:31:13 -0700423#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE)
424extern struct cpufreq_governor cpufreq_gov_powersave;
425#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE)
427extern struct cpufreq_governor cpufreq_gov_userspace;
Thomas Renninger1c256242007-10-02 13:28:12 -0700428#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace)
429#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND)
430extern struct cpufreq_governor cpufreq_gov_ondemand;
431#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand)
432#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE)
433extern struct cpufreq_governor cpufreq_gov_conservative;
434#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435#endif
436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437/*********************************************************************
438 * FREQUENCY TABLE HELPERS *
439 *********************************************************************/
440
441#define CPUFREQ_ENTRY_INVALID ~0
442#define CPUFREQ_TABLE_END ~1
Lukasz Majewski6f19efc2013-12-20 15:24:49 +0100443#define CPUFREQ_BOOST_FREQ ~2
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
445struct cpufreq_frequency_table {
Viresh Kumar50701582013-03-30 16:25:15 +0530446 unsigned int driver_data; /* driver specific data, not used by core */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 unsigned int frequency; /* kHz - doesn't need to be in ascending
448 * order */
449};
450
451int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
452 struct cpufreq_frequency_table *table);
453
454int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
455 struct cpufreq_frequency_table *table);
Viresh Kumar18434512013-10-03 20:27:55 +0530456int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
458int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
459 struct cpufreq_frequency_table *table,
460 unsigned int target_freq,
461 unsigned int relation,
462 unsigned int *index);
Viresh Kumard3916692013-12-03 11:20:46 +0530463int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
464 unsigned int freq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
Viresh Kumar74aca952013-08-06 22:53:04 +0530466void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy);
467ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
468
Lukasz Majewski6f19efc2013-12-20 15:24:49 +0100469#ifdef CONFIG_CPU_FREQ
470int cpufreq_boost_trigger_state(int state);
471int cpufreq_boost_supported(void);
472int cpufreq_boost_enabled(void);
473#else
474static inline int cpufreq_boost_trigger_state(int state)
475{
476 return 0;
477}
478static inline int cpufreq_boost_supported(void)
479{
480 return 0;
481}
482static inline int cpufreq_boost_enabled(void)
483{
484 return 0;
485}
486#endif
Viresh Kumar74aca952013-08-06 22:53:04 +0530487/* the following funtion is for cpufreq core use only */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489
490/* the following are really really optional */
491extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
Viresh Kumar18434512013-10-03 20:27:55 +0530492extern struct freq_attr *cpufreq_generic_attr[];
Thiago Farina335dc332011-04-28 20:42:53 -0300493void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 unsigned int cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495void cpufreq_frequency_table_put_attr(unsigned int cpu);
Viresh Kumar27047a62013-09-16 18:56:03 +0530496int cpufreq_table_validate_and_show(struct cpufreq_policy *policy,
497 struct cpufreq_frequency_table *table);
Lan Tianyuf4fd3792013-06-27 15:08:54 +0800498
Viresh Kumar652ed952014-01-09 20:38:43 +0530499unsigned int cpufreq_generic_get(unsigned int cpu);
Viresh Kumar70e9e772013-10-03 20:29:07 +0530500int cpufreq_generic_init(struct cpufreq_policy *policy,
501 struct cpufreq_frequency_table *table,
502 unsigned int transition_latency);
Viresh Kumar18434512013-10-03 20:27:55 +0530503static inline int cpufreq_generic_exit(struct cpufreq_policy *policy)
504{
505 cpufreq_frequency_table_put_attr(policy->cpu);
506 return 0;
507}
508
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509#endif /* _LINUX_CPUFREQ_H */