Commit | Line | Data |
---|---|---|
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; | |
230 | }; | |
231 | ||
232 | /* flags */ | |
6461f018 VK |
233 | #define CPUFREQ_STICKY (1 << 0) /* driver isn't removed even if |
234 | all ->init() calls failed */ | |
235 | #define CPUFREQ_CONST_LOOPS (1 << 1) /* loops_per_jiffy or other | |
236 | kernel "constants" aren't | |
237 | affected by frequency | |
238 | transitions */ | |
239 | #define CPUFREQ_PM_NO_WARN (1 << 2) /* don't warn on suspend/resume | |
240 | speed mismatches */ | |
1da177e4 | 241 | |
0b981e70 VK |
242 | /* |
243 | * This should be set by platforms having multiple clock-domains, i.e. | |
244 | * supporting multiple policies. With this sysfs directories of governor would | |
245 | * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same | |
246 | * governor with different tunables for different clusters. | |
247 | */ | |
248 | #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY (1 << 3) | |
249 | ||
7dbf694d VK |
250 | /* |
251 | * Driver will do POSTCHANGE notifications from outside of their ->target() | |
252 | * routine and so must set cpufreq_driver->flags with this flag, so that core | |
253 | * can handle them specially. | |
254 | */ | |
255 | #define CPUFREQ_ASYNC_NOTIFICATION (1 << 4) | |
256 | ||
ae6b4271 VK |
257 | /* |
258 | * Set by drivers which want cpufreq core to check if CPU is running at a | |
259 | * frequency present in freq-table exposed by the driver. For these drivers if | |
260 | * CPU is found running at an out of table freq, we will try to set it to a freq | |
261 | * from the table. And if that fails, we will stop further boot process by | |
262 | * issuing a BUG_ON(). | |
263 | */ | |
264 | #define CPUFREQ_NEED_INITIAL_FREQ_CHECK (1 << 5) | |
265 | ||
221dee28 LT |
266 | int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
267 | int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); | |
1da177e4 | 268 | |
74aca95d | 269 | const char *cpufreq_get_current_driver(void); |
1da177e4 | 270 | |
bb176f7d VK |
271 | static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, |
272 | unsigned int min, unsigned int max) | |
1da177e4 LT |
273 | { |
274 | if (policy->min < min) | |
275 | policy->min = min; | |
276 | if (policy->max < min) | |
277 | policy->max = min; | |
278 | if (policy->min > max) | |
279 | policy->min = max; | |
280 | if (policy->max > max) | |
281 | policy->max = max; | |
282 | if (policy->min > policy->max) | |
283 | policy->min = policy->max; | |
284 | return; | |
285 | } | |
286 | ||
be49e346 VK |
287 | static inline void |
288 | cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) | |
289 | { | |
290 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, | |
291 | policy->cpuinfo.max_freq); | |
292 | } | |
293 | ||
74aca95d VK |
294 | /********************************************************************* |
295 | * CPUFREQ NOTIFIER INTERFACE * | |
296 | *********************************************************************/ | |
6dad2a29 | 297 | |
74aca95d VK |
298 | #define CPUFREQ_TRANSITION_NOTIFIER (0) |
299 | #define CPUFREQ_POLICY_NOTIFIER (1) | |
1da177e4 | 300 | |
74aca95d VK |
301 | /* Transition notifiers */ |
302 | #define CPUFREQ_PRECHANGE (0) | |
303 | #define CPUFREQ_POSTCHANGE (1) | |
304 | #define CPUFREQ_RESUMECHANGE (8) | |
305 | #define CPUFREQ_SUSPENDCHANGE (9) | |
6dad2a29 | 306 | |
74aca95d VK |
307 | /* Policy Notifiers */ |
308 | #define CPUFREQ_ADJUST (0) | |
309 | #define CPUFREQ_INCOMPATIBLE (1) | |
310 | #define CPUFREQ_NOTIFY (2) | |
311 | #define CPUFREQ_START (3) | |
312 | #define CPUFREQ_UPDATE_POLICY_CPU (4) | |
fcd7af91 VK |
313 | #define CPUFREQ_CREATE_POLICY (5) |
314 | #define CPUFREQ_REMOVE_POLICY (6) | |
6dad2a29 | 315 | |
74aca95d VK |
316 | #ifdef CONFIG_CPU_FREQ |
317 | int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); | |
318 | int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); | |
6dad2a29 | 319 | |
74aca95d VK |
320 | void cpufreq_notify_transition(struct cpufreq_policy *policy, |
321 | struct cpufreq_freqs *freqs, unsigned int state); | |
f7ba3b41 VK |
322 | void cpufreq_notify_post_transition(struct cpufreq_policy *policy, |
323 | struct cpufreq_freqs *freqs, int transition_failed); | |
1da177e4 | 324 | |
74aca95d VK |
325 | #else /* CONFIG_CPU_FREQ */ |
326 | static inline int cpufreq_register_notifier(struct notifier_block *nb, | |
327 | unsigned int list) | |
2eca40a8 RD |
328 | { |
329 | return 0; | |
330 | } | |
74aca95d VK |
331 | static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
332 | unsigned int list) | |
95235ca2 VP |
333 | { |
334 | return 0; | |
335 | } | |
74aca95d VK |
336 | #endif /* !CONFIG_CPU_FREQ */ |
337 | ||
338 | /** | |
339 | * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch | |
340 | * safe) | |
341 | * @old: old value | |
342 | * @div: divisor | |
343 | * @mult: multiplier | |
344 | * | |
345 | * | |
346 | * new = old * mult / div | |
347 | */ | |
348 | static inline unsigned long cpufreq_scale(unsigned long old, u_int div, | |
349 | u_int mult) | |
3d737108 | 350 | { |
74aca95d VK |
351 | #if BITS_PER_LONG == 32 |
352 | u64 result = ((u64) old) * ((u64) mult); | |
353 | do_div(result, div); | |
354 | return (unsigned long) result; | |
355 | ||
356 | #elif BITS_PER_LONG == 64 | |
357 | unsigned long result = old * ((u64) mult); | |
358 | result /= div; | |
359 | return result; | |
95235ca2 | 360 | #endif |
74aca95d | 361 | } |
95235ca2 | 362 | |
1da177e4 | 363 | /********************************************************************* |
74aca95d | 364 | * CPUFREQ GOVERNORS * |
1da177e4 LT |
365 | *********************************************************************/ |
366 | ||
74aca95d VK |
367 | /* |
368 | * If (cpufreq_driver->target) exists, the ->governor decides what frequency | |
369 | * within the limits is used. If (cpufreq_driver->setpolicy> exists, these | |
370 | * two generic policies are available: | |
371 | */ | |
372 | #define CPUFREQ_POLICY_POWERSAVE (1) | |
373 | #define CPUFREQ_POLICY_PERFORMANCE (2) | |
374 | ||
375 | /* Governor Events */ | |
376 | #define CPUFREQ_GOV_START 1 | |
377 | #define CPUFREQ_GOV_STOP 2 | |
378 | #define CPUFREQ_GOV_LIMITS 3 | |
379 | #define CPUFREQ_GOV_POLICY_INIT 4 | |
380 | #define CPUFREQ_GOV_POLICY_EXIT 5 | |
381 | ||
382 | struct cpufreq_governor { | |
383 | char name[CPUFREQ_NAME_LEN]; | |
384 | int initialized; | |
385 | int (*governor) (struct cpufreq_policy *policy, | |
386 | unsigned int event); | |
387 | ssize_t (*show_setspeed) (struct cpufreq_policy *policy, | |
388 | char *buf); | |
389 | int (*store_setspeed) (struct cpufreq_policy *policy, | |
390 | unsigned int freq); | |
391 | unsigned int max_transition_latency; /* HW must be able to switch to | |
392 | next freq faster than this value in nano secs or we | |
393 | will fallback to performance governor */ | |
394 | struct list_head governor_list; | |
395 | struct module *owner; | |
396 | }; | |
397 | ||
398 | /* Pass a target to the cpufreq driver */ | |
399 | int cpufreq_driver_target(struct cpufreq_policy *policy, | |
400 | unsigned int target_freq, | |
401 | unsigned int relation); | |
402 | int __cpufreq_driver_target(struct cpufreq_policy *policy, | |
403 | unsigned int target_freq, | |
404 | unsigned int relation); | |
405 | int cpufreq_register_governor(struct cpufreq_governor *governor); | |
406 | void cpufreq_unregister_governor(struct cpufreq_governor *governor); | |
407 | ||
408 | /* CPUFREQ DEFAULT GOVERNOR */ | |
1c256245 | 409 | /* |
bb176f7d VK |
410 | * Performance governor is fallback governor if any other gov failed to auto |
411 | * load due latency restrictions | |
412 | */ | |
6afde10c | 413 | #ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE |
1da177e4 | 414 | extern struct cpufreq_governor cpufreq_gov_performance; |
6afde10c | 415 | #endif |
1c256245 TR |
416 | #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE |
417 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance) | |
30d221db AG |
418 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) |
419 | extern struct cpufreq_governor cpufreq_gov_powersave; | |
420 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave) | |
1da177e4 LT |
421 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) |
422 | extern struct cpufreq_governor cpufreq_gov_userspace; | |
1c256245 TR |
423 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace) |
424 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND) | |
425 | extern struct cpufreq_governor cpufreq_gov_ondemand; | |
426 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand) | |
427 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE) | |
428 | extern struct cpufreq_governor cpufreq_gov_conservative; | |
429 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative) | |
1da177e4 LT |
430 | #endif |
431 | ||
1da177e4 LT |
432 | /********************************************************************* |
433 | * FREQUENCY TABLE HELPERS * | |
434 | *********************************************************************/ | |
435 | ||
436 | #define CPUFREQ_ENTRY_INVALID ~0 | |
437 | #define CPUFREQ_TABLE_END ~1 | |
438 | ||
439 | struct cpufreq_frequency_table { | |
50701588 | 440 | unsigned int driver_data; /* driver specific data, not used by core */ |
1da177e4 LT |
441 | unsigned int frequency; /* kHz - doesn't need to be in ascending |
442 | * order */ | |
443 | }; | |
444 | ||
445 | int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, | |
446 | struct cpufreq_frequency_table *table); | |
447 | ||
448 | int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, | |
449 | struct cpufreq_frequency_table *table); | |
18434512 | 450 | int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy); |
1da177e4 LT |
451 | |
452 | int cpufreq_frequency_table_target(struct cpufreq_policy *policy, | |
453 | struct cpufreq_frequency_table *table, | |
454 | unsigned int target_freq, | |
455 | unsigned int relation, | |
456 | unsigned int *index); | |
d3916691 VK |
457 | int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, |
458 | unsigned int freq); | |
1da177e4 | 459 | |
74aca95d VK |
460 | void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy); |
461 | ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); | |
462 | ||
463 | /* the following funtion is for cpufreq core use only */ | |
1da177e4 | 464 | struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu); |
1da177e4 LT |
465 | |
466 | /* the following are really really optional */ | |
467 | extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; | |
18434512 | 468 | extern struct freq_attr *cpufreq_generic_attr[]; |
335dc333 | 469 | void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table, |
1da177e4 | 470 | unsigned int cpu); |
1da177e4 | 471 | void cpufreq_frequency_table_put_attr(unsigned int cpu); |
27047a60 VK |
472 | int cpufreq_table_validate_and_show(struct cpufreq_policy *policy, |
473 | struct cpufreq_frequency_table *table); | |
f4fd3797 | 474 | |
652ed95d | 475 | unsigned int cpufreq_generic_get(unsigned int cpu); |
70e9e778 VK |
476 | int cpufreq_generic_init(struct cpufreq_policy *policy, |
477 | struct cpufreq_frequency_table *table, | |
478 | unsigned int transition_latency); | |
18434512 VK |
479 | static inline int cpufreq_generic_exit(struct cpufreq_policy *policy) |
480 | { | |
481 | cpufreq_frequency_table_put_attr(policy->cpu); | |
482 | return 0; | |
483 | } | |
484 | ||
1da177e4 | 485 | #endif /* _LINUX_CPUFREQ_H */ |