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> |
12478cf0 | 19 | #include <linux/spinlock.h> |
1da177e4 | 20 | #include <linux/sysfs.h> |
1da177e4 | 21 | |
1da177e4 | 22 | /********************************************************************* |
74aca95d | 23 | * CPUFREQ INTERFACE * |
1da177e4 | 24 | *********************************************************************/ |
74aca95d VK |
25 | /* |
26 | * Frequency values here are CPU kHz | |
27 | * | |
b53cc6ea | 28 | * Maximum transition latency is in nanoseconds - if it's unknown, |
1da177e4 LT |
29 | * CPUFREQ_ETERNAL shall be used. |
30 | */ | |
31 | ||
74aca95d VK |
32 | #define CPUFREQ_ETERNAL (-1) |
33 | #define CPUFREQ_NAME_LEN 16 | |
34 | /* Print length for names. Extra 1 space for accomodating '\n' in prints */ | |
35 | #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) | |
36 | ||
1da177e4 LT |
37 | struct cpufreq_governor; |
38 | ||
74aca95d VK |
39 | struct cpufreq_freqs { |
40 | unsigned int cpu; /* cpu nr */ | |
41 | unsigned int old; | |
42 | unsigned int new; | |
43 | u8 flags; /* flags of cpufreq_driver, see below. */ | |
44 | }; | |
8aa84ad8 | 45 | |
1da177e4 LT |
46 | struct cpufreq_cpuinfo { |
47 | unsigned int max_freq; | |
48 | unsigned int min_freq; | |
335dc333 TF |
49 | |
50 | /* in 10^(-9) s = nanoseconds */ | |
51 | unsigned int transition_latency; | |
1da177e4 LT |
52 | }; |
53 | ||
54 | struct cpufreq_real_policy { | |
55 | unsigned int min; /* in kHz */ | |
56 | unsigned int max; /* in kHz */ | |
335dc333 | 57 | unsigned int policy; /* see above */ |
1da177e4 LT |
58 | struct cpufreq_governor *governor; /* see below */ |
59 | }; | |
60 | ||
61 | struct cpufreq_policy { | |
951fc5f4 VK |
62 | /* CPUs sharing clock, require sw coordination */ |
63 | cpumask_var_t cpus; /* Online CPUs only */ | |
64 | cpumask_var_t related_cpus; /* Online + Offline CPUs */ | |
65 | ||
62b36cc1 | 66 | unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs |
3b2d9942 | 67 | should set cpufreq */ |
b8eed8af VK |
68 | unsigned int cpu; /* cpu nr of CPU managing this policy */ |
69 | unsigned int last_cpu; /* cpu nr of previous CPU that managed | |
70 | * this policy */ | |
652ed95d | 71 | struct clk *clk; |
1da177e4 LT |
72 | struct cpufreq_cpuinfo cpuinfo;/* see above */ |
73 | ||
74 | unsigned int min; /* in kHz */ | |
75 | unsigned int max; /* in kHz */ | |
76 | unsigned int cur; /* in kHz, only needed if cpufreq | |
77 | * governors are used */ | |
e28867ea VK |
78 | unsigned int suspend_freq; /* freq to set during suspend */ |
79 | ||
335dc333 | 80 | unsigned int policy; /* see above */ |
1da177e4 | 81 | struct cpufreq_governor *governor; /* see below */ |
7bd353a9 | 82 | void *governor_data; |
95731ebb | 83 | bool governor_enabled; /* governor start/stop flag */ |
1da177e4 | 84 | |
1da177e4 LT |
85 | struct work_struct update; /* if update_policy() needs to be |
86 | * called, but you're in IRQ context */ | |
87 | ||
88 | struct cpufreq_real_policy user_policy; | |
e0b3165b | 89 | struct cpufreq_frequency_table *freq_table; |
1da177e4 | 90 | |
c88a1f8b | 91 | struct list_head policy_list; |
1da177e4 LT |
92 | struct kobject kobj; |
93 | struct completion kobj_unregister; | |
ad7722da | 94 | |
95 | /* | |
96 | * The rules for this semaphore: | |
97 | * - Any routine that wants to read from the policy structure will | |
98 | * do a down_read on this semaphore. | |
99 | * - Any routine that will write to the policy structure and/or may take away | |
100 | * the policy altogether (eg. CPU hotplug), will hold this lock in write | |
101 | * mode before doing so. | |
102 | * | |
103 | * Additional rules: | |
104 | * - Lock should not be held across | |
105 | * __cpufreq_governor(data, CPUFREQ_GOV_POLICY_EXIT); | |
106 | */ | |
107 | struct rw_semaphore rwsem; | |
12478cf0 SB |
108 | |
109 | /* Synchronization for frequency transitions */ | |
110 | bool transition_ongoing; /* Tracks transition status */ | |
111 | spinlock_t transition_lock; | |
112 | wait_queue_head_t transition_wait; | |
1da177e4 LT |
113 | }; |
114 | ||
62b36cc1 | 115 | /* Only for ACPI */ |
46f18e3a VP |
116 | #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ |
117 | #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ | |
118 | #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ | |
119 | #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ | |
1da177e4 | 120 | |
c75b505d | 121 | #ifdef CONFIG_CPU_FREQ |
74aca95d | 122 | struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
3a3e9e06 | 123 | void cpufreq_cpu_put(struct cpufreq_policy *policy); |
c75b505d DV |
124 | #else |
125 | static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) | |
126 | { | |
127 | return NULL; | |
128 | } | |
129 | static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } | |
130 | #endif | |
74aca95d | 131 | |
2624f90c FB |
132 | static inline bool policy_is_shared(struct cpufreq_policy *policy) |
133 | { | |
134 | return cpumask_weight(policy->cpus) > 1; | |
135 | } | |
136 | ||
74aca95d VK |
137 | /* /sys/devices/system/cpu/cpufreq: entry point for global variables */ |
138 | extern struct kobject *cpufreq_global_kobject; | |
139 | int cpufreq_get_global_kobject(void); | |
140 | void cpufreq_put_global_kobject(void); | |
141 | int cpufreq_sysfs_create_file(const struct attribute *attr); | |
142 | void cpufreq_sysfs_remove_file(const struct attribute *attr); | |
1da177e4 | 143 | |
74aca95d VK |
144 | #ifdef CONFIG_CPU_FREQ |
145 | unsigned int cpufreq_get(unsigned int cpu); | |
146 | unsigned int cpufreq_quick_get(unsigned int cpu); | |
147 | unsigned int cpufreq_quick_get_max(unsigned int cpu); | |
148 | void disable_cpufreq(void); | |
1da177e4 | 149 | |
74aca95d VK |
150 | u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); |
151 | int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); | |
152 | int cpufreq_update_policy(unsigned int cpu); | |
153 | bool have_governor_per_policy(void); | |
154 | struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); | |
155 | #else | |
156 | static inline unsigned int cpufreq_get(unsigned int cpu) | |
1da177e4 | 157 | { |
74aca95d VK |
158 | return 0; |
159 | } | |
160 | static inline unsigned int cpufreq_quick_get(unsigned int cpu) | |
161 | { | |
162 | return 0; | |
163 | } | |
164 | static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) | |
165 | { | |
166 | return 0; | |
167 | } | |
168 | static inline void disable_cpufreq(void) { } | |
1da177e4 | 169 | #endif |
1da177e4 LT |
170 | |
171 | /********************************************************************* | |
74aca95d | 172 | * CPUFREQ DRIVER INTERFACE * |
1da177e4 LT |
173 | *********************************************************************/ |
174 | ||
74aca95d VK |
175 | #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
176 | #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ | |
1da177e4 | 177 | |
74aca95d VK |
178 | struct freq_attr { |
179 | struct attribute attr; | |
180 | ssize_t (*show)(struct cpufreq_policy *, char *); | |
181 | ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); | |
1da177e4 LT |
182 | }; |
183 | ||
74aca95d VK |
184 | #define cpufreq_freq_attr_ro(_name) \ |
185 | static struct freq_attr _name = \ | |
186 | __ATTR(_name, 0444, show_##_name, NULL) | |
1da177e4 | 187 | |
74aca95d VK |
188 | #define cpufreq_freq_attr_ro_perm(_name, _perm) \ |
189 | static struct freq_attr _name = \ | |
190 | __ATTR(_name, _perm, show_##_name, NULL) | |
1da177e4 | 191 | |
74aca95d VK |
192 | #define cpufreq_freq_attr_rw(_name) \ |
193 | static struct freq_attr _name = \ | |
194 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
195 | ||
196 | struct global_attr { | |
197 | struct attribute attr; | |
198 | ssize_t (*show)(struct kobject *kobj, | |
199 | struct attribute *attr, char *buf); | |
200 | ssize_t (*store)(struct kobject *a, struct attribute *b, | |
201 | const char *c, size_t count); | |
202 | }; | |
203 | ||
204 | #define define_one_global_ro(_name) \ | |
205 | static struct global_attr _name = \ | |
206 | __ATTR(_name, 0444, show_##_name, NULL) | |
207 | ||
208 | #define define_one_global_rw(_name) \ | |
209 | static struct global_attr _name = \ | |
210 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
1da177e4 | 211 | |
1da177e4 LT |
212 | |
213 | struct cpufreq_driver { | |
1da177e4 LT |
214 | char name[CPUFREQ_NAME_LEN]; |
215 | u8 flags; | |
216 | ||
217 | /* needed by all drivers */ | |
218 | int (*init) (struct cpufreq_policy *policy); | |
219 | int (*verify) (struct cpufreq_policy *policy); | |
220 | ||
221 | /* define one out of two */ | |
222 | int (*setpolicy) (struct cpufreq_policy *policy); | |
9c0ebcf7 | 223 | int (*target) (struct cpufreq_policy *policy, /* Deprecated */ |
1da177e4 LT |
224 | unsigned int target_freq, |
225 | unsigned int relation); | |
9c0ebcf7 VK |
226 | int (*target_index) (struct cpufreq_policy *policy, |
227 | unsigned int index); | |
1da177e4 LT |
228 | |
229 | /* should be defined, if possible */ | |
230 | unsigned int (*get) (unsigned int cpu); | |
231 | ||
232 | /* optional */ | |
e2f74f35 | 233 | int (*bios_limit) (int cpu, unsigned int *limit); |
bf0b90e3 | 234 | |
1da177e4 | 235 | int (*exit) (struct cpufreq_policy *policy); |
367dc4aa | 236 | void (*stop_cpu) (struct cpufreq_policy *policy); |
7ca64e2d | 237 | int (*suspend) (struct cpufreq_policy *policy); |
1da177e4 LT |
238 | int (*resume) (struct cpufreq_policy *policy); |
239 | struct freq_attr **attr; | |
6f19efc0 LM |
240 | |
241 | /* platform specific boost support code */ | |
242 | bool boost_supported; | |
243 | bool boost_enabled; | |
244 | int (*set_boost) (int state); | |
1da177e4 LT |
245 | }; |
246 | ||
247 | /* flags */ | |
6461f018 VK |
248 | #define CPUFREQ_STICKY (1 << 0) /* driver isn't removed even if |
249 | all ->init() calls failed */ | |
250 | #define CPUFREQ_CONST_LOOPS (1 << 1) /* loops_per_jiffy or other | |
251 | kernel "constants" aren't | |
252 | affected by frequency | |
253 | transitions */ | |
254 | #define CPUFREQ_PM_NO_WARN (1 << 2) /* don't warn on suspend/resume | |
255 | speed mismatches */ | |
1da177e4 | 256 | |
0b981e70 VK |
257 | /* |
258 | * This should be set by platforms having multiple clock-domains, i.e. | |
259 | * supporting multiple policies. With this sysfs directories of governor would | |
260 | * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same | |
261 | * governor with different tunables for different clusters. | |
262 | */ | |
263 | #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY (1 << 3) | |
264 | ||
7dbf694d VK |
265 | /* |
266 | * Driver will do POSTCHANGE notifications from outside of their ->target() | |
267 | * routine and so must set cpufreq_driver->flags with this flag, so that core | |
268 | * can handle them specially. | |
269 | */ | |
270 | #define CPUFREQ_ASYNC_NOTIFICATION (1 << 4) | |
271 | ||
ae6b4271 VK |
272 | /* |
273 | * Set by drivers which want cpufreq core to check if CPU is running at a | |
274 | * frequency present in freq-table exposed by the driver. For these drivers if | |
275 | * CPU is found running at an out of table freq, we will try to set it to a freq | |
276 | * from the table. And if that fails, we will stop further boot process by | |
277 | * issuing a BUG_ON(). | |
278 | */ | |
279 | #define CPUFREQ_NEED_INITIAL_FREQ_CHECK (1 << 5) | |
280 | ||
221dee28 LT |
281 | int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
282 | int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); | |
1da177e4 | 283 | |
74aca95d | 284 | const char *cpufreq_get_current_driver(void); |
1da177e4 | 285 | |
bb176f7d VK |
286 | static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, |
287 | unsigned int min, unsigned int max) | |
1da177e4 LT |
288 | { |
289 | if (policy->min < min) | |
290 | policy->min = min; | |
291 | if (policy->max < min) | |
292 | policy->max = min; | |
293 | if (policy->min > max) | |
294 | policy->min = max; | |
295 | if (policy->max > max) | |
296 | policy->max = max; | |
297 | if (policy->min > policy->max) | |
298 | policy->min = policy->max; | |
299 | return; | |
300 | } | |
301 | ||
be49e346 VK |
302 | static inline void |
303 | cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) | |
304 | { | |
305 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, | |
306 | policy->cpuinfo.max_freq); | |
307 | } | |
308 | ||
2f0aea93 VK |
309 | #ifdef CONFIG_CPU_FREQ |
310 | void cpufreq_suspend(void); | |
311 | void cpufreq_resume(void); | |
e28867ea | 312 | int cpufreq_generic_suspend(struct cpufreq_policy *policy); |
2f0aea93 VK |
313 | #else |
314 | static inline void cpufreq_suspend(void) {} | |
315 | static inline void cpufreq_resume(void) {} | |
316 | #endif | |
317 | ||
74aca95d VK |
318 | /********************************************************************* |
319 | * CPUFREQ NOTIFIER INTERFACE * | |
320 | *********************************************************************/ | |
6dad2a29 | 321 | |
74aca95d VK |
322 | #define CPUFREQ_TRANSITION_NOTIFIER (0) |
323 | #define CPUFREQ_POLICY_NOTIFIER (1) | |
1da177e4 | 324 | |
74aca95d VK |
325 | /* Transition notifiers */ |
326 | #define CPUFREQ_PRECHANGE (0) | |
327 | #define CPUFREQ_POSTCHANGE (1) | |
6dad2a29 | 328 | |
74aca95d VK |
329 | /* Policy Notifiers */ |
330 | #define CPUFREQ_ADJUST (0) | |
331 | #define CPUFREQ_INCOMPATIBLE (1) | |
332 | #define CPUFREQ_NOTIFY (2) | |
333 | #define CPUFREQ_START (3) | |
334 | #define CPUFREQ_UPDATE_POLICY_CPU (4) | |
fcd7af91 VK |
335 | #define CPUFREQ_CREATE_POLICY (5) |
336 | #define CPUFREQ_REMOVE_POLICY (6) | |
6dad2a29 | 337 | |
74aca95d VK |
338 | #ifdef CONFIG_CPU_FREQ |
339 | int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); | |
340 | int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); | |
6dad2a29 | 341 | |
12478cf0 SB |
342 | void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, |
343 | struct cpufreq_freqs *freqs); | |
344 | void cpufreq_freq_transition_end(struct cpufreq_policy *policy, | |
345 | struct cpufreq_freqs *freqs, int transition_failed); | |
1da177e4 | 346 | |
74aca95d VK |
347 | #else /* CONFIG_CPU_FREQ */ |
348 | static inline int cpufreq_register_notifier(struct notifier_block *nb, | |
349 | unsigned int list) | |
2eca40a8 RD |
350 | { |
351 | return 0; | |
352 | } | |
74aca95d VK |
353 | static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
354 | unsigned int list) | |
95235ca2 VP |
355 | { |
356 | return 0; | |
357 | } | |
74aca95d VK |
358 | #endif /* !CONFIG_CPU_FREQ */ |
359 | ||
360 | /** | |
361 | * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch | |
362 | * safe) | |
363 | * @old: old value | |
364 | * @div: divisor | |
365 | * @mult: multiplier | |
366 | * | |
367 | * | |
368 | * new = old * mult / div | |
369 | */ | |
370 | static inline unsigned long cpufreq_scale(unsigned long old, u_int div, | |
371 | u_int mult) | |
3d737108 | 372 | { |
74aca95d VK |
373 | #if BITS_PER_LONG == 32 |
374 | u64 result = ((u64) old) * ((u64) mult); | |
375 | do_div(result, div); | |
376 | return (unsigned long) result; | |
377 | ||
378 | #elif BITS_PER_LONG == 64 | |
379 | unsigned long result = old * ((u64) mult); | |
380 | result /= div; | |
381 | return result; | |
95235ca2 | 382 | #endif |
74aca95d | 383 | } |
95235ca2 | 384 | |
1da177e4 | 385 | /********************************************************************* |
74aca95d | 386 | * CPUFREQ GOVERNORS * |
1da177e4 LT |
387 | *********************************************************************/ |
388 | ||
74aca95d VK |
389 | /* |
390 | * If (cpufreq_driver->target) exists, the ->governor decides what frequency | |
391 | * within the limits is used. If (cpufreq_driver->setpolicy> exists, these | |
392 | * two generic policies are available: | |
393 | */ | |
394 | #define CPUFREQ_POLICY_POWERSAVE (1) | |
395 | #define CPUFREQ_POLICY_PERFORMANCE (2) | |
396 | ||
397 | /* Governor Events */ | |
398 | #define CPUFREQ_GOV_START 1 | |
399 | #define CPUFREQ_GOV_STOP 2 | |
400 | #define CPUFREQ_GOV_LIMITS 3 | |
401 | #define CPUFREQ_GOV_POLICY_INIT 4 | |
402 | #define CPUFREQ_GOV_POLICY_EXIT 5 | |
403 | ||
404 | struct cpufreq_governor { | |
405 | char name[CPUFREQ_NAME_LEN]; | |
406 | int initialized; | |
407 | int (*governor) (struct cpufreq_policy *policy, | |
408 | unsigned int event); | |
409 | ssize_t (*show_setspeed) (struct cpufreq_policy *policy, | |
410 | char *buf); | |
411 | int (*store_setspeed) (struct cpufreq_policy *policy, | |
412 | unsigned int freq); | |
413 | unsigned int max_transition_latency; /* HW must be able to switch to | |
414 | next freq faster than this value in nano secs or we | |
415 | will fallback to performance governor */ | |
416 | struct list_head governor_list; | |
417 | struct module *owner; | |
418 | }; | |
419 | ||
420 | /* Pass a target to the cpufreq driver */ | |
421 | int cpufreq_driver_target(struct cpufreq_policy *policy, | |
422 | unsigned int target_freq, | |
423 | unsigned int relation); | |
424 | int __cpufreq_driver_target(struct cpufreq_policy *policy, | |
425 | unsigned int target_freq, | |
426 | unsigned int relation); | |
427 | int cpufreq_register_governor(struct cpufreq_governor *governor); | |
428 | void cpufreq_unregister_governor(struct cpufreq_governor *governor); | |
429 | ||
430 | /* CPUFREQ DEFAULT GOVERNOR */ | |
1c256245 | 431 | /* |
bb176f7d VK |
432 | * Performance governor is fallback governor if any other gov failed to auto |
433 | * load due latency restrictions | |
434 | */ | |
6afde10c | 435 | #ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE |
1da177e4 | 436 | extern struct cpufreq_governor cpufreq_gov_performance; |
6afde10c | 437 | #endif |
1c256245 TR |
438 | #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE |
439 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance) | |
30d221db AG |
440 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) |
441 | extern struct cpufreq_governor cpufreq_gov_powersave; | |
442 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave) | |
1da177e4 LT |
443 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) |
444 | extern struct cpufreq_governor cpufreq_gov_userspace; | |
1c256245 TR |
445 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace) |
446 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND) | |
447 | extern struct cpufreq_governor cpufreq_gov_ondemand; | |
448 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand) | |
449 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE) | |
450 | extern struct cpufreq_governor cpufreq_gov_conservative; | |
451 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative) | |
1da177e4 LT |
452 | #endif |
453 | ||
1da177e4 LT |
454 | /********************************************************************* |
455 | * FREQUENCY TABLE HELPERS * | |
456 | *********************************************************************/ | |
457 | ||
7f4b0461 VK |
458 | /* Special Values of .frequency field */ |
459 | #define CPUFREQ_ENTRY_INVALID ~0 | |
460 | #define CPUFREQ_TABLE_END ~1 | |
461 | /* Special Values of .flags field */ | |
462 | #define CPUFREQ_BOOST_FREQ (1 << 0) | |
1da177e4 LT |
463 | |
464 | struct cpufreq_frequency_table { | |
7f4b0461 | 465 | unsigned int flags; |
50701588 | 466 | unsigned int driver_data; /* driver specific data, not used by core */ |
1da177e4 LT |
467 | unsigned int frequency; /* kHz - doesn't need to be in ascending |
468 | * order */ | |
469 | }; | |
470 | ||
471 | int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, | |
472 | struct cpufreq_frequency_table *table); | |
473 | ||
474 | int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, | |
475 | struct cpufreq_frequency_table *table); | |
18434512 | 476 | int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy); |
1da177e4 LT |
477 | |
478 | int cpufreq_frequency_table_target(struct cpufreq_policy *policy, | |
479 | struct cpufreq_frequency_table *table, | |
480 | unsigned int target_freq, | |
481 | unsigned int relation, | |
482 | unsigned int *index); | |
d3916691 VK |
483 | int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, |
484 | unsigned int freq); | |
1da177e4 | 485 | |
74aca95d VK |
486 | ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); |
487 | ||
6f19efc0 LM |
488 | #ifdef CONFIG_CPU_FREQ |
489 | int cpufreq_boost_trigger_state(int state); | |
490 | int cpufreq_boost_supported(void); | |
491 | int cpufreq_boost_enabled(void); | |
492 | #else | |
493 | static inline int cpufreq_boost_trigger_state(int state) | |
494 | { | |
495 | return 0; | |
496 | } | |
497 | static inline int cpufreq_boost_supported(void) | |
498 | { | |
499 | return 0; | |
500 | } | |
501 | static inline int cpufreq_boost_enabled(void) | |
502 | { | |
503 | return 0; | |
504 | } | |
505 | #endif | |
74aca95d | 506 | /* the following funtion is for cpufreq core use only */ |
1da177e4 | 507 | struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu); |
1da177e4 LT |
508 | |
509 | /* the following are really really optional */ | |
510 | extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; | |
18434512 | 511 | extern struct freq_attr *cpufreq_generic_attr[]; |
27047a60 VK |
512 | int cpufreq_table_validate_and_show(struct cpufreq_policy *policy, |
513 | struct cpufreq_frequency_table *table); | |
f4fd3797 | 514 | |
652ed95d | 515 | unsigned int cpufreq_generic_get(unsigned int cpu); |
70e9e778 VK |
516 | int cpufreq_generic_init(struct cpufreq_policy *policy, |
517 | struct cpufreq_frequency_table *table, | |
518 | unsigned int transition_latency); | |
1da177e4 | 519 | #endif /* _LINUX_CPUFREQ_H */ |