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 */ |
9d16f207 SK |
68 | unsigned int cpu; /* cpu managing this policy, must be online */ |
69 | unsigned int kobj_cpu; /* cpu managing sysfs files, can be offline */ | |
70 | ||
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 */ | |
1c03a2d0 | 78 | unsigned int restore_freq; /* = policy->cur before transition */ |
e28867ea VK |
79 | unsigned int suspend_freq; /* freq to set during suspend */ |
80 | ||
335dc333 | 81 | unsigned int policy; /* see above */ |
1da177e4 | 82 | struct cpufreq_governor *governor; /* see below */ |
7bd353a9 | 83 | void *governor_data; |
95731ebb | 84 | bool governor_enabled; /* governor start/stop flag */ |
4573237b | 85 | char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */ |
1da177e4 | 86 | |
1da177e4 LT |
87 | struct work_struct update; /* if update_policy() needs to be |
88 | * called, but you're in IRQ context */ | |
89 | ||
90 | struct cpufreq_real_policy user_policy; | |
e0b3165b | 91 | struct cpufreq_frequency_table *freq_table; |
1da177e4 | 92 | |
c88a1f8b | 93 | struct list_head policy_list; |
1da177e4 LT |
94 | struct kobject kobj; |
95 | struct completion kobj_unregister; | |
ad7722da | 96 | |
97 | /* | |
98 | * The rules for this semaphore: | |
99 | * - Any routine that wants to read from the policy structure will | |
100 | * do a down_read on this semaphore. | |
101 | * - Any routine that will write to the policy structure and/or may take away | |
102 | * the policy altogether (eg. CPU hotplug), will hold this lock in write | |
103 | * mode before doing so. | |
104 | * | |
105 | * Additional rules: | |
106 | * - Lock should not be held across | |
107 | * __cpufreq_governor(data, CPUFREQ_GOV_POLICY_EXIT); | |
108 | */ | |
109 | struct rw_semaphore rwsem; | |
12478cf0 SB |
110 | |
111 | /* Synchronization for frequency transitions */ | |
112 | bool transition_ongoing; /* Tracks transition status */ | |
113 | spinlock_t transition_lock; | |
114 | wait_queue_head_t transition_wait; | |
ca654dc3 | 115 | struct task_struct *transition_task; /* Task which is doing the transition */ |
413fffc3 | 116 | |
a9aaf291 VK |
117 | /* cpufreq-stats */ |
118 | struct cpufreq_stats *stats; | |
119 | ||
413fffc3 VK |
120 | /* For cpufreq driver's internal use */ |
121 | void *driver_data; | |
1da177e4 LT |
122 | }; |
123 | ||
62b36cc1 | 124 | /* Only for ACPI */ |
46f18e3a VP |
125 | #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ |
126 | #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ | |
127 | #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ | |
128 | #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ | |
1da177e4 | 129 | |
c75b505d | 130 | #ifdef CONFIG_CPU_FREQ |
74aca95d | 131 | struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
3a3e9e06 | 132 | void cpufreq_cpu_put(struct cpufreq_policy *policy); |
c75b505d DV |
133 | #else |
134 | static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) | |
135 | { | |
136 | return NULL; | |
137 | } | |
138 | static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } | |
139 | #endif | |
74aca95d | 140 | |
2624f90c FB |
141 | static inline bool policy_is_shared(struct cpufreq_policy *policy) |
142 | { | |
143 | return cpumask_weight(policy->cpus) > 1; | |
144 | } | |
145 | ||
74aca95d VK |
146 | /* /sys/devices/system/cpu/cpufreq: entry point for global variables */ |
147 | extern struct kobject *cpufreq_global_kobject; | |
148 | int cpufreq_get_global_kobject(void); | |
149 | void cpufreq_put_global_kobject(void); | |
150 | int cpufreq_sysfs_create_file(const struct attribute *attr); | |
151 | void cpufreq_sysfs_remove_file(const struct attribute *attr); | |
1da177e4 | 152 | |
74aca95d VK |
153 | #ifdef CONFIG_CPU_FREQ |
154 | unsigned int cpufreq_get(unsigned int cpu); | |
155 | unsigned int cpufreq_quick_get(unsigned int cpu); | |
156 | unsigned int cpufreq_quick_get_max(unsigned int cpu); | |
157 | void disable_cpufreq(void); | |
1da177e4 | 158 | |
74aca95d VK |
159 | u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); |
160 | int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); | |
161 | int cpufreq_update_policy(unsigned int cpu); | |
162 | bool have_governor_per_policy(void); | |
163 | struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); | |
164 | #else | |
165 | static inline unsigned int cpufreq_get(unsigned int cpu) | |
1da177e4 | 166 | { |
74aca95d VK |
167 | return 0; |
168 | } | |
169 | static inline unsigned int cpufreq_quick_get(unsigned int cpu) | |
170 | { | |
171 | return 0; | |
172 | } | |
173 | static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) | |
174 | { | |
175 | return 0; | |
176 | } | |
177 | static inline void disable_cpufreq(void) { } | |
1da177e4 | 178 | #endif |
1da177e4 LT |
179 | |
180 | /********************************************************************* | |
74aca95d | 181 | * CPUFREQ DRIVER INTERFACE * |
1da177e4 LT |
182 | *********************************************************************/ |
183 | ||
74aca95d VK |
184 | #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
185 | #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ | |
5b0c0b16 | 186 | #define CPUFREQ_RELATION_C 2 /* closest frequency to target */ |
1da177e4 | 187 | |
74aca95d VK |
188 | struct freq_attr { |
189 | struct attribute attr; | |
190 | ssize_t (*show)(struct cpufreq_policy *, char *); | |
191 | ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); | |
1da177e4 LT |
192 | }; |
193 | ||
74aca95d VK |
194 | #define cpufreq_freq_attr_ro(_name) \ |
195 | static struct freq_attr _name = \ | |
196 | __ATTR(_name, 0444, show_##_name, NULL) | |
1da177e4 | 197 | |
74aca95d VK |
198 | #define cpufreq_freq_attr_ro_perm(_name, _perm) \ |
199 | static struct freq_attr _name = \ | |
200 | __ATTR(_name, _perm, show_##_name, NULL) | |
1da177e4 | 201 | |
74aca95d VK |
202 | #define cpufreq_freq_attr_rw(_name) \ |
203 | static struct freq_attr _name = \ | |
204 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
205 | ||
206 | struct global_attr { | |
207 | struct attribute attr; | |
208 | ssize_t (*show)(struct kobject *kobj, | |
209 | struct attribute *attr, char *buf); | |
210 | ssize_t (*store)(struct kobject *a, struct attribute *b, | |
211 | const char *c, size_t count); | |
212 | }; | |
213 | ||
214 | #define define_one_global_ro(_name) \ | |
215 | static struct global_attr _name = \ | |
216 | __ATTR(_name, 0444, show_##_name, NULL) | |
217 | ||
218 | #define define_one_global_rw(_name) \ | |
219 | static struct global_attr _name = \ | |
220 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
1da177e4 | 221 | |
1da177e4 LT |
222 | |
223 | struct cpufreq_driver { | |
90452e61 VK |
224 | char name[CPUFREQ_NAME_LEN]; |
225 | u8 flags; | |
226 | void *driver_data; | |
1da177e4 LT |
227 | |
228 | /* needed by all drivers */ | |
90452e61 VK |
229 | int (*init)(struct cpufreq_policy *policy); |
230 | int (*verify)(struct cpufreq_policy *policy); | |
1da177e4 LT |
231 | |
232 | /* define one out of two */ | |
90452e61 | 233 | int (*setpolicy)(struct cpufreq_policy *policy); |
1c03a2d0 VK |
234 | |
235 | /* | |
236 | * On failure, should always restore frequency to policy->restore_freq | |
237 | * (i.e. old freq). | |
238 | */ | |
90452e61 VK |
239 | int (*target)(struct cpufreq_policy *policy, |
240 | unsigned int target_freq, | |
241 | unsigned int relation); /* Deprecated */ | |
242 | int (*target_index)(struct cpufreq_policy *policy, | |
243 | unsigned int index); | |
1c03a2d0 VK |
244 | /* |
245 | * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION | |
246 | * unset. | |
247 | * | |
248 | * get_intermediate should return a stable intermediate frequency | |
249 | * platform wants to switch to and target_intermediate() should set CPU | |
250 | * to to that frequency, before jumping to the frequency corresponding | |
251 | * to 'index'. Core will take care of sending notifications and driver | |
252 | * doesn't have to handle them in target_intermediate() or | |
253 | * target_index(). | |
254 | * | |
255 | * Drivers can return '0' from get_intermediate() in case they don't | |
256 | * wish to switch to intermediate frequency for some target frequency. | |
257 | * In that case core will directly call ->target_index(). | |
258 | */ | |
90452e61 VK |
259 | unsigned int (*get_intermediate)(struct cpufreq_policy *policy, |
260 | unsigned int index); | |
261 | int (*target_intermediate)(struct cpufreq_policy *policy, | |
262 | unsigned int index); | |
1da177e4 LT |
263 | |
264 | /* should be defined, if possible */ | |
90452e61 | 265 | unsigned int (*get)(unsigned int cpu); |
1da177e4 LT |
266 | |
267 | /* optional */ | |
90452e61 | 268 | int (*bios_limit)(int cpu, unsigned int *limit); |
bf0b90e3 | 269 | |
90452e61 VK |
270 | int (*exit)(struct cpufreq_policy *policy); |
271 | void (*stop_cpu)(struct cpufreq_policy *policy); | |
272 | int (*suspend)(struct cpufreq_policy *policy); | |
273 | int (*resume)(struct cpufreq_policy *policy); | |
7c45cf31 VK |
274 | |
275 | /* Will be called after the driver is fully initialized */ | |
276 | void (*ready)(struct cpufreq_policy *policy); | |
277 | ||
90452e61 | 278 | struct freq_attr **attr; |
6f19efc0 LM |
279 | |
280 | /* platform specific boost support code */ | |
90452e61 VK |
281 | bool boost_supported; |
282 | bool boost_enabled; | |
283 | int (*set_boost)(int state); | |
1da177e4 LT |
284 | }; |
285 | ||
286 | /* flags */ | |
6461f018 VK |
287 | #define CPUFREQ_STICKY (1 << 0) /* driver isn't removed even if |
288 | all ->init() calls failed */ | |
289 | #define CPUFREQ_CONST_LOOPS (1 << 1) /* loops_per_jiffy or other | |
290 | kernel "constants" aren't | |
291 | affected by frequency | |
292 | transitions */ | |
293 | #define CPUFREQ_PM_NO_WARN (1 << 2) /* don't warn on suspend/resume | |
294 | speed mismatches */ | |
1da177e4 | 295 | |
0b981e70 VK |
296 | /* |
297 | * This should be set by platforms having multiple clock-domains, i.e. | |
298 | * supporting multiple policies. With this sysfs directories of governor would | |
299 | * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same | |
300 | * governor with different tunables for different clusters. | |
301 | */ | |
302 | #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY (1 << 3) | |
303 | ||
7dbf694d VK |
304 | /* |
305 | * Driver will do POSTCHANGE notifications from outside of their ->target() | |
306 | * routine and so must set cpufreq_driver->flags with this flag, so that core | |
307 | * can handle them specially. | |
308 | */ | |
309 | #define CPUFREQ_ASYNC_NOTIFICATION (1 << 4) | |
310 | ||
ae6b4271 VK |
311 | /* |
312 | * Set by drivers which want cpufreq core to check if CPU is running at a | |
313 | * frequency present in freq-table exposed by the driver. For these drivers if | |
314 | * CPU is found running at an out of table freq, we will try to set it to a freq | |
315 | * from the table. And if that fails, we will stop further boot process by | |
316 | * issuing a BUG_ON(). | |
317 | */ | |
318 | #define CPUFREQ_NEED_INITIAL_FREQ_CHECK (1 << 5) | |
319 | ||
221dee28 LT |
320 | int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
321 | int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); | |
1da177e4 | 322 | |
74aca95d | 323 | const char *cpufreq_get_current_driver(void); |
51315cdf | 324 | void *cpufreq_get_driver_data(void); |
1da177e4 | 325 | |
bb176f7d VK |
326 | static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, |
327 | unsigned int min, unsigned int max) | |
1da177e4 LT |
328 | { |
329 | if (policy->min < min) | |
330 | policy->min = min; | |
331 | if (policy->max < min) | |
332 | policy->max = min; | |
333 | if (policy->min > max) | |
334 | policy->min = max; | |
335 | if (policy->max > max) | |
336 | policy->max = max; | |
337 | if (policy->min > policy->max) | |
338 | policy->min = policy->max; | |
339 | return; | |
340 | } | |
341 | ||
be49e346 VK |
342 | static inline void |
343 | cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) | |
344 | { | |
345 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, | |
346 | policy->cpuinfo.max_freq); | |
347 | } | |
348 | ||
2f0aea93 VK |
349 | #ifdef CONFIG_CPU_FREQ |
350 | void cpufreq_suspend(void); | |
351 | void cpufreq_resume(void); | |
e28867ea | 352 | int cpufreq_generic_suspend(struct cpufreq_policy *policy); |
2f0aea93 VK |
353 | #else |
354 | static inline void cpufreq_suspend(void) {} | |
355 | static inline void cpufreq_resume(void) {} | |
356 | #endif | |
357 | ||
74aca95d VK |
358 | /********************************************************************* |
359 | * CPUFREQ NOTIFIER INTERFACE * | |
360 | *********************************************************************/ | |
6dad2a29 | 361 | |
74aca95d VK |
362 | #define CPUFREQ_TRANSITION_NOTIFIER (0) |
363 | #define CPUFREQ_POLICY_NOTIFIER (1) | |
1da177e4 | 364 | |
74aca95d VK |
365 | /* Transition notifiers */ |
366 | #define CPUFREQ_PRECHANGE (0) | |
367 | #define CPUFREQ_POSTCHANGE (1) | |
6dad2a29 | 368 | |
74aca95d VK |
369 | /* Policy Notifiers */ |
370 | #define CPUFREQ_ADJUST (0) | |
371 | #define CPUFREQ_INCOMPATIBLE (1) | |
372 | #define CPUFREQ_NOTIFY (2) | |
373 | #define CPUFREQ_START (3) | |
d9f35446 VK |
374 | #define CPUFREQ_CREATE_POLICY (4) |
375 | #define CPUFREQ_REMOVE_POLICY (5) | |
6dad2a29 | 376 | |
74aca95d VK |
377 | #ifdef CONFIG_CPU_FREQ |
378 | int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); | |
379 | int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); | |
6dad2a29 | 380 | |
12478cf0 SB |
381 | void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, |
382 | struct cpufreq_freqs *freqs); | |
383 | void cpufreq_freq_transition_end(struct cpufreq_policy *policy, | |
384 | struct cpufreq_freqs *freqs, int transition_failed); | |
1da177e4 | 385 | |
74aca95d VK |
386 | #else /* CONFIG_CPU_FREQ */ |
387 | static inline int cpufreq_register_notifier(struct notifier_block *nb, | |
388 | unsigned int list) | |
2eca40a8 RD |
389 | { |
390 | return 0; | |
391 | } | |
74aca95d VK |
392 | static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
393 | unsigned int list) | |
95235ca2 VP |
394 | { |
395 | return 0; | |
396 | } | |
74aca95d VK |
397 | #endif /* !CONFIG_CPU_FREQ */ |
398 | ||
399 | /** | |
400 | * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch | |
401 | * safe) | |
402 | * @old: old value | |
403 | * @div: divisor | |
404 | * @mult: multiplier | |
405 | * | |
406 | * | |
407 | * new = old * mult / div | |
408 | */ | |
409 | static inline unsigned long cpufreq_scale(unsigned long old, u_int div, | |
410 | u_int mult) | |
3d737108 | 411 | { |
74aca95d VK |
412 | #if BITS_PER_LONG == 32 |
413 | u64 result = ((u64) old) * ((u64) mult); | |
414 | do_div(result, div); | |
415 | return (unsigned long) result; | |
416 | ||
417 | #elif BITS_PER_LONG == 64 | |
418 | unsigned long result = old * ((u64) mult); | |
419 | result /= div; | |
420 | return result; | |
95235ca2 | 421 | #endif |
74aca95d | 422 | } |
95235ca2 | 423 | |
1da177e4 | 424 | /********************************************************************* |
74aca95d | 425 | * CPUFREQ GOVERNORS * |
1da177e4 LT |
426 | *********************************************************************/ |
427 | ||
74aca95d VK |
428 | /* |
429 | * If (cpufreq_driver->target) exists, the ->governor decides what frequency | |
430 | * within the limits is used. If (cpufreq_driver->setpolicy> exists, these | |
431 | * two generic policies are available: | |
432 | */ | |
433 | #define CPUFREQ_POLICY_POWERSAVE (1) | |
434 | #define CPUFREQ_POLICY_PERFORMANCE (2) | |
435 | ||
436 | /* Governor Events */ | |
437 | #define CPUFREQ_GOV_START 1 | |
438 | #define CPUFREQ_GOV_STOP 2 | |
439 | #define CPUFREQ_GOV_LIMITS 3 | |
440 | #define CPUFREQ_GOV_POLICY_INIT 4 | |
441 | #define CPUFREQ_GOV_POLICY_EXIT 5 | |
442 | ||
443 | struct cpufreq_governor { | |
444 | char name[CPUFREQ_NAME_LEN]; | |
445 | int initialized; | |
446 | int (*governor) (struct cpufreq_policy *policy, | |
447 | unsigned int event); | |
448 | ssize_t (*show_setspeed) (struct cpufreq_policy *policy, | |
449 | char *buf); | |
450 | int (*store_setspeed) (struct cpufreq_policy *policy, | |
451 | unsigned int freq); | |
452 | unsigned int max_transition_latency; /* HW must be able to switch to | |
453 | next freq faster than this value in nano secs or we | |
454 | will fallback to performance governor */ | |
455 | struct list_head governor_list; | |
456 | struct module *owner; | |
457 | }; | |
458 | ||
459 | /* Pass a target to the cpufreq driver */ | |
460 | int cpufreq_driver_target(struct cpufreq_policy *policy, | |
461 | unsigned int target_freq, | |
462 | unsigned int relation); | |
463 | int __cpufreq_driver_target(struct cpufreq_policy *policy, | |
464 | unsigned int target_freq, | |
465 | unsigned int relation); | |
466 | int cpufreq_register_governor(struct cpufreq_governor *governor); | |
467 | void cpufreq_unregister_governor(struct cpufreq_governor *governor); | |
468 | ||
469 | /* CPUFREQ DEFAULT GOVERNOR */ | |
1c256245 | 470 | /* |
bb176f7d VK |
471 | * Performance governor is fallback governor if any other gov failed to auto |
472 | * load due latency restrictions | |
473 | */ | |
6afde10c | 474 | #ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE |
1da177e4 | 475 | extern struct cpufreq_governor cpufreq_gov_performance; |
6afde10c | 476 | #endif |
1c256245 TR |
477 | #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE |
478 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance) | |
30d221db AG |
479 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) |
480 | extern struct cpufreq_governor cpufreq_gov_powersave; | |
481 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave) | |
1da177e4 LT |
482 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) |
483 | extern struct cpufreq_governor cpufreq_gov_userspace; | |
1c256245 TR |
484 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace) |
485 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND) | |
486 | extern struct cpufreq_governor cpufreq_gov_ondemand; | |
487 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand) | |
488 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE) | |
489 | extern struct cpufreq_governor cpufreq_gov_conservative; | |
490 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative) | |
1da177e4 LT |
491 | #endif |
492 | ||
1da177e4 LT |
493 | /********************************************************************* |
494 | * FREQUENCY TABLE HELPERS * | |
495 | *********************************************************************/ | |
496 | ||
7f4b0461 | 497 | /* Special Values of .frequency field */ |
2b1987a9 BH |
498 | #define CPUFREQ_ENTRY_INVALID ~0u |
499 | #define CPUFREQ_TABLE_END ~1u | |
7f4b0461 VK |
500 | /* Special Values of .flags field */ |
501 | #define CPUFREQ_BOOST_FREQ (1 << 0) | |
1da177e4 LT |
502 | |
503 | struct cpufreq_frequency_table { | |
7f4b0461 | 504 | unsigned int flags; |
50701588 | 505 | unsigned int driver_data; /* driver specific data, not used by core */ |
1da177e4 LT |
506 | unsigned int frequency; /* kHz - doesn't need to be in ascending |
507 | * order */ | |
508 | }; | |
509 | ||
a0dd7b79 NM |
510 | #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP) |
511 | int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
512 | struct cpufreq_frequency_table **table); | |
513 | void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
514 | struct cpufreq_frequency_table **table); | |
515 | #else | |
516 | static inline int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
517 | struct cpufreq_frequency_table | |
518 | **table) | |
519 | { | |
520 | return -EINVAL; | |
521 | } | |
522 | ||
523 | static inline void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
524 | struct cpufreq_frequency_table | |
525 | **table) | |
526 | { | |
527 | } | |
528 | #endif | |
529 | ||
5eeaf1f1 SK |
530 | static inline bool cpufreq_next_valid(struct cpufreq_frequency_table **pos) |
531 | { | |
532 | while ((*pos)->frequency != CPUFREQ_TABLE_END) | |
533 | if ((*pos)->frequency != CPUFREQ_ENTRY_INVALID) | |
534 | return true; | |
535 | else | |
536 | (*pos)++; | |
537 | return false; | |
538 | } | |
27e289dc SK |
539 | |
540 | /* | |
541 | * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table | |
542 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
543 | * @table: the cpufreq_frequency_table * to iterate over. | |
544 | */ | |
545 | ||
546 | #define cpufreq_for_each_entry(pos, table) \ | |
547 | for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) | |
548 | ||
549 | /* | |
550 | * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table | |
551 | * excluding CPUFREQ_ENTRY_INVALID frequencies. | |
552 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
553 | * @table: the cpufreq_frequency_table * to iterate over. | |
554 | */ | |
555 | ||
556 | #define cpufreq_for_each_valid_entry(pos, table) \ | |
557 | for (pos = table; cpufreq_next_valid(&pos); pos++) | |
558 | ||
1da177e4 LT |
559 | int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, |
560 | struct cpufreq_frequency_table *table); | |
561 | ||
562 | int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, | |
563 | struct cpufreq_frequency_table *table); | |
18434512 | 564 | int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy); |
1da177e4 LT |
565 | |
566 | int cpufreq_frequency_table_target(struct cpufreq_policy *policy, | |
567 | struct cpufreq_frequency_table *table, | |
568 | unsigned int target_freq, | |
569 | unsigned int relation, | |
570 | unsigned int *index); | |
d3916691 VK |
571 | int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, |
572 | unsigned int freq); | |
1da177e4 | 573 | |
74aca95d VK |
574 | ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); |
575 | ||
6f19efc0 LM |
576 | #ifdef CONFIG_CPU_FREQ |
577 | int cpufreq_boost_trigger_state(int state); | |
578 | int cpufreq_boost_supported(void); | |
579 | int cpufreq_boost_enabled(void); | |
580 | #else | |
581 | static inline int cpufreq_boost_trigger_state(int state) | |
582 | { | |
583 | return 0; | |
584 | } | |
585 | static inline int cpufreq_boost_supported(void) | |
586 | { | |
587 | return 0; | |
588 | } | |
589 | static inline int cpufreq_boost_enabled(void) | |
590 | { | |
591 | return 0; | |
592 | } | |
593 | #endif | |
74aca95d | 594 | /* the following funtion is for cpufreq core use only */ |
1da177e4 | 595 | struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu); |
1da177e4 LT |
596 | |
597 | /* the following are really really optional */ | |
598 | extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; | |
18434512 | 599 | extern struct freq_attr *cpufreq_generic_attr[]; |
27047a60 VK |
600 | int cpufreq_table_validate_and_show(struct cpufreq_policy *policy, |
601 | struct cpufreq_frequency_table *table); | |
f4fd3797 | 602 | |
652ed95d | 603 | unsigned int cpufreq_generic_get(unsigned int cpu); |
70e9e778 VK |
604 | int cpufreq_generic_init(struct cpufreq_policy *policy, |
605 | struct cpufreq_frequency_table *table, | |
606 | unsigned int transition_latency); | |
1da177e4 | 607 | #endif /* _LINUX_CPUFREQ_H */ |