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1da177e4 | 1 | /* |
bb176f7d | 2 | * linux/include/linux/cpufreq.h |
1da177e4 | 3 | * |
bb176f7d VK |
4 | * Copyright (C) 2001 Russell King |
5 | * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> | |
335dc333 | 6 | * |
1da177e4 LT |
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. | |
10 | */ | |
11 | #ifndef _LINUX_CPUFREQ_H | |
12 | #define _LINUX_CPUFREQ_H | |
13 | ||
652ed95d | 14 | #include <linux/clk.h> |
5ff0a268 VK |
15 | #include <linux/cpumask.h> |
16 | #include <linux/completion.h> | |
1da177e4 | 17 | #include <linux/kobject.h> |
5ff0a268 | 18 | #include <linux/notifier.h> |
1da177e4 | 19 | #include <linux/sysfs.h> |
1da177e4 | 20 | |
1da177e4 | 21 | /********************************************************************* |
74aca95d | 22 | * CPUFREQ INTERFACE * |
1da177e4 | 23 | *********************************************************************/ |
74aca95d VK |
24 | /* |
25 | * Frequency values here are CPU kHz | |
26 | * | |
b53cc6ea | 27 | * Maximum transition latency is in nanoseconds - if it's unknown, |
1da177e4 LT |
28 | * CPUFREQ_ETERNAL shall be used. |
29 | */ | |
30 | ||
74aca95d VK |
31 | #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 | ||
1da177e4 LT |
36 | struct cpufreq_governor; |
37 | ||
74aca95d VK |
38 | struct 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 | }; | |
8aa84ad8 | 44 | |
1da177e4 LT |
45 | struct cpufreq_cpuinfo { |
46 | unsigned int max_freq; | |
47 | unsigned int min_freq; | |
335dc333 TF |
48 | |
49 | /* in 10^(-9) s = nanoseconds */ | |
50 | unsigned int transition_latency; | |
1da177e4 LT |
51 | }; |
52 | ||
53 | struct cpufreq_real_policy { | |
54 | unsigned int min; /* in kHz */ | |
55 | unsigned int max; /* in kHz */ | |
335dc333 | 56 | unsigned int policy; /* see above */ |
1da177e4 LT |
57 | struct cpufreq_governor *governor; /* see below */ |
58 | }; | |
59 | ||
60 | struct cpufreq_policy { | |
951fc5f4 VK |
61 | /* CPUs sharing clock, require sw coordination */ |
62 | cpumask_var_t cpus; /* Online CPUs only */ | |
63 | cpumask_var_t related_cpus; /* Online + Offline CPUs */ | |
64 | ||
62b36cc1 | 65 | unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs |
3b2d9942 | 66 | should set cpufreq */ |
b8eed8af VK |
67 | 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 */ | |
652ed95d | 70 | struct clk *clk; |
1da177e4 LT |
71 | 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 */ | |
335dc333 | 77 | unsigned int policy; /* see above */ |
1da177e4 | 78 | struct cpufreq_governor *governor; /* see below */ |
7bd353a9 | 79 | void *governor_data; |
95731ebb | 80 | bool governor_enabled; /* governor start/stop flag */ |
1da177e4 | 81 | |
1da177e4 LT |
82 | 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 | ||
c88a1f8b | 87 | struct list_head policy_list; |
1da177e4 LT |
88 | struct kobject kobj; |
89 | struct completion kobj_unregister; | |
ad7722da | 90 | |
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; | |
1da177e4 LT |
104 | }; |
105 | ||
62b36cc1 | 106 | /* Only for ACPI */ |
46f18e3a VP |
107 | #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*/ | |
1da177e4 | 111 | |
c75b505d | 112 | #ifdef CONFIG_CPU_FREQ |
74aca95d | 113 | struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
3a3e9e06 | 114 | void cpufreq_cpu_put(struct cpufreq_policy *policy); |
c75b505d DV |
115 | #else |
116 | static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) | |
117 | { | |
118 | return NULL; | |
119 | } | |
120 | static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } | |
121 | #endif | |
74aca95d | 122 | |
2624f90c FB |
123 | static inline bool policy_is_shared(struct cpufreq_policy *policy) |
124 | { | |
125 | return cpumask_weight(policy->cpus) > 1; | |
126 | } | |
127 | ||
74aca95d VK |
128 | /* /sys/devices/system/cpu/cpufreq: entry point for global variables */ |
129 | extern struct kobject *cpufreq_global_kobject; | |
130 | int cpufreq_get_global_kobject(void); | |
131 | void cpufreq_put_global_kobject(void); | |
132 | int cpufreq_sysfs_create_file(const struct attribute *attr); | |
133 | void cpufreq_sysfs_remove_file(const struct attribute *attr); | |
1da177e4 | 134 | |
74aca95d VK |
135 | #ifdef CONFIG_CPU_FREQ |
136 | unsigned int cpufreq_get(unsigned int cpu); | |
137 | unsigned int cpufreq_quick_get(unsigned int cpu); | |
138 | unsigned int cpufreq_quick_get_max(unsigned int cpu); | |
139 | void disable_cpufreq(void); | |
1da177e4 | 140 | |
74aca95d VK |
141 | u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); |
142 | int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); | |
143 | int cpufreq_update_policy(unsigned int cpu); | |
144 | bool have_governor_per_policy(void); | |
145 | struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); | |
146 | #else | |
147 | static inline unsigned int cpufreq_get(unsigned int cpu) | |
1da177e4 | 148 | { |
74aca95d VK |
149 | return 0; |
150 | } | |
151 | static inline unsigned int cpufreq_quick_get(unsigned int cpu) | |
152 | { | |
153 | return 0; | |
154 | } | |
155 | static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) | |
156 | { | |
157 | return 0; | |
158 | } | |
159 | static inline void disable_cpufreq(void) { } | |
1da177e4 | 160 | #endif |
1da177e4 LT |
161 | |
162 | /********************************************************************* | |
74aca95d | 163 | * CPUFREQ DRIVER INTERFACE * |
1da177e4 LT |
164 | *********************************************************************/ |
165 | ||
74aca95d VK |
166 | #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
167 | #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ | |
1da177e4 | 168 | |
74aca95d VK |
169 | struct 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); | |
1da177e4 LT |
173 | }; |
174 | ||
74aca95d VK |
175 | #define cpufreq_freq_attr_ro(_name) \ |
176 | static struct freq_attr _name = \ | |
177 | __ATTR(_name, 0444, show_##_name, NULL) | |
1da177e4 | 178 | |
74aca95d VK |
179 | #define cpufreq_freq_attr_ro_perm(_name, _perm) \ |
180 | static struct freq_attr _name = \ | |
181 | __ATTR(_name, _perm, show_##_name, NULL) | |
1da177e4 | 182 | |
74aca95d VK |
183 | #define cpufreq_freq_attr_rw(_name) \ |
184 | static struct freq_attr _name = \ | |
185 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
186 | ||
187 | struct 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) \ | |
196 | static struct global_attr _name = \ | |
197 | __ATTR(_name, 0444, show_##_name, NULL) | |
198 | ||
199 | #define define_one_global_rw(_name) \ | |
200 | static struct global_attr _name = \ | |
201 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
1da177e4 | 202 | |
1da177e4 LT |
203 | |
204 | struct cpufreq_driver { | |
1da177e4 LT |
205 | 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); | |
9c0ebcf7 | 214 | int (*target) (struct cpufreq_policy *policy, /* Deprecated */ |
1da177e4 LT |
215 | unsigned int target_freq, |
216 | unsigned int relation); | |
9c0ebcf7 VK |
217 | int (*target_index) (struct cpufreq_policy *policy, |
218 | unsigned int index); | |
1da177e4 LT |
219 | |
220 | /* should be defined, if possible */ | |
221 | unsigned int (*get) (unsigned int cpu); | |
222 | ||
223 | /* optional */ | |
e2f74f35 | 224 | int (*bios_limit) (int cpu, unsigned int *limit); |
bf0b90e3 | 225 | |
1da177e4 | 226 | int (*exit) (struct cpufreq_policy *policy); |
7ca64e2d | 227 | int (*suspend) (struct cpufreq_policy *policy); |
1da177e4 LT |
228 | int (*resume) (struct cpufreq_policy *policy); |
229 | struct freq_attr **attr; | |
6f19efc0 LM |
230 | |
231 | /* platform specific boost support code */ | |
232 | bool boost_supported; | |
233 | bool boost_enabled; | |
234 | int (*set_boost) (int state); | |
1da177e4 LT |
235 | }; |
236 | ||
237 | /* flags */ | |
6461f018 VK |
238 | #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 */ | |
1da177e4 | 246 | |
0b981e70 VK |
247 | /* |
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 | ||
7dbf694d VK |
255 | /* |
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 | ||
ae6b4271 VK |
262 | /* |
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 | ||
221dee28 LT |
271 | int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
272 | int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); | |
1da177e4 | 273 | |
74aca95d | 274 | const char *cpufreq_get_current_driver(void); |
1da177e4 | 275 | |
bb176f7d VK |
276 | static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, |
277 | unsigned int min, unsigned int max) | |
1da177e4 LT |
278 | { |
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 | ||
be49e346 VK |
292 | static inline void |
293 | cpufreq_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 | ||
74aca95d VK |
299 | /********************************************************************* |
300 | * CPUFREQ NOTIFIER INTERFACE * | |
301 | *********************************************************************/ | |
6dad2a29 | 302 | |
74aca95d VK |
303 | #define CPUFREQ_TRANSITION_NOTIFIER (0) |
304 | #define CPUFREQ_POLICY_NOTIFIER (1) | |
1da177e4 | 305 | |
74aca95d VK |
306 | /* Transition notifiers */ |
307 | #define CPUFREQ_PRECHANGE (0) | |
308 | #define CPUFREQ_POSTCHANGE (1) | |
309 | #define CPUFREQ_RESUMECHANGE (8) | |
310 | #define CPUFREQ_SUSPENDCHANGE (9) | |
6dad2a29 | 311 | |
74aca95d VK |
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) | |
fcd7af91 VK |
318 | #define CPUFREQ_CREATE_POLICY (5) |
319 | #define CPUFREQ_REMOVE_POLICY (6) | |
6dad2a29 | 320 | |
74aca95d VK |
321 | #ifdef CONFIG_CPU_FREQ |
322 | int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); | |
323 | int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); | |
6dad2a29 | 324 | |
74aca95d VK |
325 | void cpufreq_notify_transition(struct cpufreq_policy *policy, |
326 | struct cpufreq_freqs *freqs, unsigned int state); | |
f7ba3b41 VK |
327 | void cpufreq_notify_post_transition(struct cpufreq_policy *policy, |
328 | struct cpufreq_freqs *freqs, int transition_failed); | |
1da177e4 | 329 | |
74aca95d VK |
330 | #else /* CONFIG_CPU_FREQ */ |
331 | static inline int cpufreq_register_notifier(struct notifier_block *nb, | |
332 | unsigned int list) | |
2eca40a8 RD |
333 | { |
334 | return 0; | |
335 | } | |
74aca95d VK |
336 | static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
337 | unsigned int list) | |
95235ca2 VP |
338 | { |
339 | return 0; | |
340 | } | |
74aca95d VK |
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 | */ | |
353 | static inline unsigned long cpufreq_scale(unsigned long old, u_int div, | |
354 | u_int mult) | |
3d737108 | 355 | { |
74aca95d VK |
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; | |
95235ca2 | 365 | #endif |
74aca95d | 366 | } |
95235ca2 | 367 | |
1da177e4 | 368 | /********************************************************************* |
74aca95d | 369 | * CPUFREQ GOVERNORS * |
1da177e4 LT |
370 | *********************************************************************/ |
371 | ||
74aca95d VK |
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 | ||
387 | struct 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 */ | |
404 | int cpufreq_driver_target(struct cpufreq_policy *policy, | |
405 | unsigned int target_freq, | |
406 | unsigned int relation); | |
407 | int __cpufreq_driver_target(struct cpufreq_policy *policy, | |
408 | unsigned int target_freq, | |
409 | unsigned int relation); | |
410 | int cpufreq_register_governor(struct cpufreq_governor *governor); | |
411 | void cpufreq_unregister_governor(struct cpufreq_governor *governor); | |
412 | ||
413 | /* CPUFREQ DEFAULT GOVERNOR */ | |
1c256245 | 414 | /* |
bb176f7d VK |
415 | * Performance governor is fallback governor if any other gov failed to auto |
416 | * load due latency restrictions | |
417 | */ | |
6afde10c | 418 | #ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE |
1da177e4 | 419 | extern struct cpufreq_governor cpufreq_gov_performance; |
6afde10c | 420 | #endif |
1c256245 TR |
421 | #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE |
422 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance) | |
30d221db AG |
423 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) |
424 | extern struct cpufreq_governor cpufreq_gov_powersave; | |
425 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave) | |
1da177e4 LT |
426 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) |
427 | extern struct cpufreq_governor cpufreq_gov_userspace; | |
1c256245 TR |
428 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace) |
429 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND) | |
430 | extern struct cpufreq_governor cpufreq_gov_ondemand; | |
431 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand) | |
432 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE) | |
433 | extern struct cpufreq_governor cpufreq_gov_conservative; | |
434 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative) | |
1da177e4 LT |
435 | #endif |
436 | ||
1da177e4 LT |
437 | /********************************************************************* |
438 | * FREQUENCY TABLE HELPERS * | |
439 | *********************************************************************/ | |
440 | ||
441 | #define CPUFREQ_ENTRY_INVALID ~0 | |
442 | #define CPUFREQ_TABLE_END ~1 | |
6f19efc0 | 443 | #define CPUFREQ_BOOST_FREQ ~2 |
1da177e4 LT |
444 | |
445 | struct cpufreq_frequency_table { | |
50701588 | 446 | unsigned int driver_data; /* driver specific data, not used by core */ |
1da177e4 LT |
447 | unsigned int frequency; /* kHz - doesn't need to be in ascending |
448 | * order */ | |
449 | }; | |
450 | ||
451 | int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, | |
452 | struct cpufreq_frequency_table *table); | |
453 | ||
454 | int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, | |
455 | struct cpufreq_frequency_table *table); | |
18434512 | 456 | int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy); |
1da177e4 LT |
457 | |
458 | int 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); | |
d3916691 VK |
463 | int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, |
464 | unsigned int freq); | |
1da177e4 | 465 | |
74aca95d VK |
466 | void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy); |
467 | ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); | |
468 | ||
6f19efc0 LM |
469 | #ifdef CONFIG_CPU_FREQ |
470 | int cpufreq_boost_trigger_state(int state); | |
471 | int cpufreq_boost_supported(void); | |
472 | int cpufreq_boost_enabled(void); | |
473 | #else | |
474 | static inline int cpufreq_boost_trigger_state(int state) | |
475 | { | |
476 | return 0; | |
477 | } | |
478 | static inline int cpufreq_boost_supported(void) | |
479 | { | |
480 | return 0; | |
481 | } | |
482 | static inline int cpufreq_boost_enabled(void) | |
483 | { | |
484 | return 0; | |
485 | } | |
486 | #endif | |
74aca95d | 487 | /* the following funtion is for cpufreq core use only */ |
1da177e4 | 488 | struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu); |
1da177e4 LT |
489 | |
490 | /* the following are really really optional */ | |
491 | extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; | |
18434512 | 492 | extern struct freq_attr *cpufreq_generic_attr[]; |
335dc333 | 493 | void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table, |
1da177e4 | 494 | unsigned int cpu); |
1da177e4 | 495 | void cpufreq_frequency_table_put_attr(unsigned int cpu); |
27047a60 VK |
496 | int cpufreq_table_validate_and_show(struct cpufreq_policy *policy, |
497 | struct cpufreq_frequency_table *table); | |
f4fd3797 | 498 | |
652ed95d | 499 | unsigned int cpufreq_generic_get(unsigned int cpu); |
70e9e778 VK |
500 | int cpufreq_generic_init(struct cpufreq_policy *policy, |
501 | struct cpufreq_frequency_table *table, | |
502 | unsigned int transition_latency); | |
18434512 VK |
503 | static inline int cpufreq_generic_exit(struct cpufreq_policy *policy) |
504 | { | |
505 | cpufreq_frequency_table_put_attr(policy->cpu); | |
506 | return 0; | |
507 | } | |
508 | ||
1da177e4 | 509 | #endif /* _LINUX_CPUFREQ_H */ |