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1 | /* | |
2 | * linux/include/linux/cpufreq.h | |
3 | * | |
4 | * Copyright (C) 2001 Russell King | |
5 | * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> | |
6 | * | |
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 | ||
14 | #include <linux/clk.h> | |
15 | #include <linux/cpumask.h> | |
16 | #include <linux/completion.h> | |
17 | #include <linux/kobject.h> | |
18 | #include <linux/notifier.h> | |
19 | #include <linux/spinlock.h> | |
20 | #include <linux/sysfs.h> | |
21 | ||
22 | /********************************************************************* | |
23 | * CPUFREQ INTERFACE * | |
24 | *********************************************************************/ | |
25 | /* | |
26 | * Frequency values here are CPU kHz | |
27 | * | |
28 | * Maximum transition latency is in nanoseconds - if it's unknown, | |
29 | * CPUFREQ_ETERNAL shall be used. | |
30 | */ | |
31 | ||
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 | ||
37 | struct cpufreq_governor; | |
38 | ||
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 | }; | |
45 | ||
46 | struct cpufreq_cpuinfo { | |
47 | unsigned int max_freq; | |
48 | unsigned int min_freq; | |
49 | ||
50 | /* in 10^(-9) s = nanoseconds */ | |
51 | unsigned int transition_latency; | |
52 | }; | |
53 | ||
54 | struct cpufreq_user_policy { | |
55 | unsigned int min; /* in kHz */ | |
56 | unsigned int max; /* in kHz */ | |
57 | }; | |
58 | ||
59 | struct cpufreq_policy { | |
60 | /* CPUs sharing clock, require sw coordination */ | |
61 | cpumask_var_t cpus; /* Online CPUs only */ | |
62 | cpumask_var_t related_cpus; /* Online + Offline CPUs */ | |
63 | cpumask_var_t real_cpus; /* Related and present */ | |
64 | ||
65 | unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs | |
66 | should set cpufreq */ | |
67 | unsigned int cpu; /* cpu managing this policy, must be online */ | |
68 | unsigned int kobj_cpu; /* cpu managing sysfs files, can be offline */ | |
69 | ||
70 | struct clk *clk; | |
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 */ | |
77 | unsigned int restore_freq; /* = policy->cur before transition */ | |
78 | unsigned int suspend_freq; /* freq to set during suspend */ | |
79 | ||
80 | unsigned int policy; /* see above */ | |
81 | struct cpufreq_governor *governor; /* see below */ | |
82 | void *governor_data; | |
83 | bool governor_enabled; /* governor start/stop flag */ | |
84 | char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */ | |
85 | ||
86 | struct work_struct update; /* if update_policy() needs to be | |
87 | * called, but you're in IRQ context */ | |
88 | ||
89 | struct cpufreq_user_policy user_policy; | |
90 | struct cpufreq_frequency_table *freq_table; | |
91 | ||
92 | struct list_head policy_list; | |
93 | struct kobject kobj; | |
94 | struct completion kobj_unregister; | |
95 | ||
96 | /* | |
97 | * The rules for this semaphore: | |
98 | * - Any routine that wants to read from the policy structure will | |
99 | * do a down_read on this semaphore. | |
100 | * - Any routine that will write to the policy structure and/or may take away | |
101 | * the policy altogether (eg. CPU hotplug), will hold this lock in write | |
102 | * mode before doing so. | |
103 | * | |
104 | * Additional rules: | |
105 | * - Lock should not be held across | |
106 | * __cpufreq_governor(data, CPUFREQ_GOV_POLICY_EXIT); | |
107 | */ | |
108 | struct rw_semaphore rwsem; | |
109 | ||
110 | /* Synchronization for frequency transitions */ | |
111 | bool transition_ongoing; /* Tracks transition status */ | |
112 | spinlock_t transition_lock; | |
113 | wait_queue_head_t transition_wait; | |
114 | struct task_struct *transition_task; /* Task which is doing the transition */ | |
115 | ||
116 | /* cpufreq-stats */ | |
117 | struct cpufreq_stats *stats; | |
118 | ||
119 | /* For cpufreq driver's internal use */ | |
120 | void *driver_data; | |
121 | }; | |
122 | ||
123 | /* Only for ACPI */ | |
124 | #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ | |
125 | #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ | |
126 | #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ | |
127 | #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ | |
128 | ||
129 | #ifdef CONFIG_CPU_FREQ | |
130 | struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu); | |
131 | struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); | |
132 | void cpufreq_cpu_put(struct cpufreq_policy *policy); | |
133 | #else | |
134 | static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu) | |
135 | { | |
136 | return NULL; | |
137 | } | |
138 | static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) | |
139 | { | |
140 | return NULL; | |
141 | } | |
142 | static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } | |
143 | #endif | |
144 | ||
145 | static inline bool policy_is_shared(struct cpufreq_policy *policy) | |
146 | { | |
147 | return cpumask_weight(policy->cpus) > 1; | |
148 | } | |
149 | ||
150 | /* /sys/devices/system/cpu/cpufreq: entry point for global variables */ | |
151 | extern struct kobject *cpufreq_global_kobject; | |
152 | int cpufreq_get_global_kobject(void); | |
153 | void cpufreq_put_global_kobject(void); | |
154 | int cpufreq_sysfs_create_file(const struct attribute *attr); | |
155 | void cpufreq_sysfs_remove_file(const struct attribute *attr); | |
156 | ||
157 | #ifdef CONFIG_CPU_FREQ | |
158 | unsigned int cpufreq_get(unsigned int cpu); | |
159 | unsigned int cpufreq_quick_get(unsigned int cpu); | |
160 | unsigned int cpufreq_quick_get_max(unsigned int cpu); | |
161 | void disable_cpufreq(void); | |
162 | ||
163 | u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); | |
164 | int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); | |
165 | int cpufreq_update_policy(unsigned int cpu); | |
166 | bool have_governor_per_policy(void); | |
167 | struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); | |
168 | #else | |
169 | static inline unsigned int cpufreq_get(unsigned int cpu) | |
170 | { | |
171 | return 0; | |
172 | } | |
173 | static inline unsigned int cpufreq_quick_get(unsigned int cpu) | |
174 | { | |
175 | return 0; | |
176 | } | |
177 | static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) | |
178 | { | |
179 | return 0; | |
180 | } | |
181 | static inline void disable_cpufreq(void) { } | |
182 | #endif | |
183 | ||
184 | /********************************************************************* | |
185 | * CPUFREQ DRIVER INTERFACE * | |
186 | *********************************************************************/ | |
187 | ||
188 | #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ | |
189 | #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ | |
190 | #define CPUFREQ_RELATION_C 2 /* closest frequency to target */ | |
191 | ||
192 | struct freq_attr { | |
193 | struct attribute attr; | |
194 | ssize_t (*show)(struct cpufreq_policy *, char *); | |
195 | ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); | |
196 | }; | |
197 | ||
198 | #define cpufreq_freq_attr_ro(_name) \ | |
199 | static struct freq_attr _name = \ | |
200 | __ATTR(_name, 0444, show_##_name, NULL) | |
201 | ||
202 | #define cpufreq_freq_attr_ro_perm(_name, _perm) \ | |
203 | static struct freq_attr _name = \ | |
204 | __ATTR(_name, _perm, show_##_name, NULL) | |
205 | ||
206 | #define cpufreq_freq_attr_rw(_name) \ | |
207 | static struct freq_attr _name = \ | |
208 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
209 | ||
210 | struct global_attr { | |
211 | struct attribute attr; | |
212 | ssize_t (*show)(struct kobject *kobj, | |
213 | struct attribute *attr, char *buf); | |
214 | ssize_t (*store)(struct kobject *a, struct attribute *b, | |
215 | const char *c, size_t count); | |
216 | }; | |
217 | ||
218 | #define define_one_global_ro(_name) \ | |
219 | static struct global_attr _name = \ | |
220 | __ATTR(_name, 0444, show_##_name, NULL) | |
221 | ||
222 | #define define_one_global_rw(_name) \ | |
223 | static struct global_attr _name = \ | |
224 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
225 | ||
226 | ||
227 | struct cpufreq_driver { | |
228 | char name[CPUFREQ_NAME_LEN]; | |
229 | u8 flags; | |
230 | void *driver_data; | |
231 | ||
232 | /* needed by all drivers */ | |
233 | int (*init)(struct cpufreq_policy *policy); | |
234 | int (*verify)(struct cpufreq_policy *policy); | |
235 | ||
236 | /* define one out of two */ | |
237 | int (*setpolicy)(struct cpufreq_policy *policy); | |
238 | ||
239 | /* | |
240 | * On failure, should always restore frequency to policy->restore_freq | |
241 | * (i.e. old freq). | |
242 | */ | |
243 | int (*target)(struct cpufreq_policy *policy, | |
244 | unsigned int target_freq, | |
245 | unsigned int relation); /* Deprecated */ | |
246 | int (*target_index)(struct cpufreq_policy *policy, | |
247 | unsigned int index); | |
248 | /* | |
249 | * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION | |
250 | * unset. | |
251 | * | |
252 | * get_intermediate should return a stable intermediate frequency | |
253 | * platform wants to switch to and target_intermediate() should set CPU | |
254 | * to to that frequency, before jumping to the frequency corresponding | |
255 | * to 'index'. Core will take care of sending notifications and driver | |
256 | * doesn't have to handle them in target_intermediate() or | |
257 | * target_index(). | |
258 | * | |
259 | * Drivers can return '0' from get_intermediate() in case they don't | |
260 | * wish to switch to intermediate frequency for some target frequency. | |
261 | * In that case core will directly call ->target_index(). | |
262 | */ | |
263 | unsigned int (*get_intermediate)(struct cpufreq_policy *policy, | |
264 | unsigned int index); | |
265 | int (*target_intermediate)(struct cpufreq_policy *policy, | |
266 | unsigned int index); | |
267 | ||
268 | /* should be defined, if possible */ | |
269 | unsigned int (*get)(unsigned int cpu); | |
270 | ||
271 | /* optional */ | |
272 | int (*bios_limit)(int cpu, unsigned int *limit); | |
273 | ||
274 | int (*exit)(struct cpufreq_policy *policy); | |
275 | void (*stop_cpu)(struct cpufreq_policy *policy); | |
276 | int (*suspend)(struct cpufreq_policy *policy); | |
277 | int (*resume)(struct cpufreq_policy *policy); | |
278 | ||
279 | /* Will be called after the driver is fully initialized */ | |
280 | void (*ready)(struct cpufreq_policy *policy); | |
281 | ||
282 | struct freq_attr **attr; | |
283 | ||
284 | /* platform specific boost support code */ | |
285 | bool boost_supported; | |
286 | bool boost_enabled; | |
287 | int (*set_boost)(int state); | |
288 | }; | |
289 | ||
290 | /* flags */ | |
291 | #define CPUFREQ_STICKY (1 << 0) /* driver isn't removed even if | |
292 | all ->init() calls failed */ | |
293 | #define CPUFREQ_CONST_LOOPS (1 << 1) /* loops_per_jiffy or other | |
294 | kernel "constants" aren't | |
295 | affected by frequency | |
296 | transitions */ | |
297 | #define CPUFREQ_PM_NO_WARN (1 << 2) /* don't warn on suspend/resume | |
298 | speed mismatches */ | |
299 | ||
300 | /* | |
301 | * This should be set by platforms having multiple clock-domains, i.e. | |
302 | * supporting multiple policies. With this sysfs directories of governor would | |
303 | * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same | |
304 | * governor with different tunables for different clusters. | |
305 | */ | |
306 | #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY (1 << 3) | |
307 | ||
308 | /* | |
309 | * Driver will do POSTCHANGE notifications from outside of their ->target() | |
310 | * routine and so must set cpufreq_driver->flags with this flag, so that core | |
311 | * can handle them specially. | |
312 | */ | |
313 | #define CPUFREQ_ASYNC_NOTIFICATION (1 << 4) | |
314 | ||
315 | /* | |
316 | * Set by drivers which want cpufreq core to check if CPU is running at a | |
317 | * frequency present in freq-table exposed by the driver. For these drivers if | |
318 | * CPU is found running at an out of table freq, we will try to set it to a freq | |
319 | * from the table. And if that fails, we will stop further boot process by | |
320 | * issuing a BUG_ON(). | |
321 | */ | |
322 | #define CPUFREQ_NEED_INITIAL_FREQ_CHECK (1 << 5) | |
323 | ||
324 | int cpufreq_register_driver(struct cpufreq_driver *driver_data); | |
325 | int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); | |
326 | ||
327 | const char *cpufreq_get_current_driver(void); | |
328 | void *cpufreq_get_driver_data(void); | |
329 | ||
330 | static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, | |
331 | unsigned int min, unsigned int max) | |
332 | { | |
333 | if (policy->min < min) | |
334 | policy->min = min; | |
335 | if (policy->max < min) | |
336 | policy->max = min; | |
337 | if (policy->min > max) | |
338 | policy->min = max; | |
339 | if (policy->max > max) | |
340 | policy->max = max; | |
341 | if (policy->min > policy->max) | |
342 | policy->min = policy->max; | |
343 | return; | |
344 | } | |
345 | ||
346 | static inline void | |
347 | cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) | |
348 | { | |
349 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, | |
350 | policy->cpuinfo.max_freq); | |
351 | } | |
352 | ||
353 | #ifdef CONFIG_CPU_FREQ | |
354 | void cpufreq_suspend(void); | |
355 | void cpufreq_resume(void); | |
356 | int cpufreq_generic_suspend(struct cpufreq_policy *policy); | |
357 | #else | |
358 | static inline void cpufreq_suspend(void) {} | |
359 | static inline void cpufreq_resume(void) {} | |
360 | #endif | |
361 | ||
362 | /********************************************************************* | |
363 | * CPUFREQ NOTIFIER INTERFACE * | |
364 | *********************************************************************/ | |
365 | ||
366 | #define CPUFREQ_TRANSITION_NOTIFIER (0) | |
367 | #define CPUFREQ_POLICY_NOTIFIER (1) | |
368 | ||
369 | /* Transition notifiers */ | |
370 | #define CPUFREQ_PRECHANGE (0) | |
371 | #define CPUFREQ_POSTCHANGE (1) | |
372 | ||
373 | /* Policy Notifiers */ | |
374 | #define CPUFREQ_ADJUST (0) | |
375 | #define CPUFREQ_NOTIFY (1) | |
376 | #define CPUFREQ_START (2) | |
377 | #define CPUFREQ_CREATE_POLICY (3) | |
378 | #define CPUFREQ_REMOVE_POLICY (4) | |
379 | ||
380 | #ifdef CONFIG_CPU_FREQ | |
381 | int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); | |
382 | int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); | |
383 | ||
384 | void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, | |
385 | struct cpufreq_freqs *freqs); | |
386 | void cpufreq_freq_transition_end(struct cpufreq_policy *policy, | |
387 | struct cpufreq_freqs *freqs, int transition_failed); | |
388 | ||
389 | #else /* CONFIG_CPU_FREQ */ | |
390 | static inline int cpufreq_register_notifier(struct notifier_block *nb, | |
391 | unsigned int list) | |
392 | { | |
393 | return 0; | |
394 | } | |
395 | static inline int cpufreq_unregister_notifier(struct notifier_block *nb, | |
396 | unsigned int list) | |
397 | { | |
398 | return 0; | |
399 | } | |
400 | #endif /* !CONFIG_CPU_FREQ */ | |
401 | ||
402 | /** | |
403 | * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch | |
404 | * safe) | |
405 | * @old: old value | |
406 | * @div: divisor | |
407 | * @mult: multiplier | |
408 | * | |
409 | * | |
410 | * new = old * mult / div | |
411 | */ | |
412 | static inline unsigned long cpufreq_scale(unsigned long old, u_int div, | |
413 | u_int mult) | |
414 | { | |
415 | #if BITS_PER_LONG == 32 | |
416 | u64 result = ((u64) old) * ((u64) mult); | |
417 | do_div(result, div); | |
418 | return (unsigned long) result; | |
419 | ||
420 | #elif BITS_PER_LONG == 64 | |
421 | unsigned long result = old * ((u64) mult); | |
422 | result /= div; | |
423 | return result; | |
424 | #endif | |
425 | } | |
426 | ||
427 | /********************************************************************* | |
428 | * CPUFREQ GOVERNORS * | |
429 | *********************************************************************/ | |
430 | ||
431 | /* | |
432 | * If (cpufreq_driver->target) exists, the ->governor decides what frequency | |
433 | * within the limits is used. If (cpufreq_driver->setpolicy> exists, these | |
434 | * two generic policies are available: | |
435 | */ | |
436 | #define CPUFREQ_POLICY_POWERSAVE (1) | |
437 | #define CPUFREQ_POLICY_PERFORMANCE (2) | |
438 | ||
439 | /* Governor Events */ | |
440 | #define CPUFREQ_GOV_START 1 | |
441 | #define CPUFREQ_GOV_STOP 2 | |
442 | #define CPUFREQ_GOV_LIMITS 3 | |
443 | #define CPUFREQ_GOV_POLICY_INIT 4 | |
444 | #define CPUFREQ_GOV_POLICY_EXIT 5 | |
445 | ||
446 | struct cpufreq_governor { | |
447 | char name[CPUFREQ_NAME_LEN]; | |
448 | int initialized; | |
449 | int (*governor) (struct cpufreq_policy *policy, | |
450 | unsigned int event); | |
451 | ssize_t (*show_setspeed) (struct cpufreq_policy *policy, | |
452 | char *buf); | |
453 | int (*store_setspeed) (struct cpufreq_policy *policy, | |
454 | unsigned int freq); | |
455 | unsigned int max_transition_latency; /* HW must be able to switch to | |
456 | next freq faster than this value in nano secs or we | |
457 | will fallback to performance governor */ | |
458 | struct list_head governor_list; | |
459 | struct module *owner; | |
460 | }; | |
461 | ||
462 | /* Pass a target to the cpufreq driver */ | |
463 | int cpufreq_driver_target(struct cpufreq_policy *policy, | |
464 | unsigned int target_freq, | |
465 | unsigned int relation); | |
466 | int __cpufreq_driver_target(struct cpufreq_policy *policy, | |
467 | unsigned int target_freq, | |
468 | unsigned int relation); | |
469 | int cpufreq_register_governor(struct cpufreq_governor *governor); | |
470 | void cpufreq_unregister_governor(struct cpufreq_governor *governor); | |
471 | ||
472 | /* CPUFREQ DEFAULT GOVERNOR */ | |
473 | /* | |
474 | * Performance governor is fallback governor if any other gov failed to auto | |
475 | * load due latency restrictions | |
476 | */ | |
477 | #ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE | |
478 | extern struct cpufreq_governor cpufreq_gov_performance; | |
479 | #endif | |
480 | #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE | |
481 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance) | |
482 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) | |
483 | extern struct cpufreq_governor cpufreq_gov_powersave; | |
484 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave) | |
485 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) | |
486 | extern struct cpufreq_governor cpufreq_gov_userspace; | |
487 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace) | |
488 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND) | |
489 | extern struct cpufreq_governor cpufreq_gov_ondemand; | |
490 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand) | |
491 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE) | |
492 | extern struct cpufreq_governor cpufreq_gov_conservative; | |
493 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative) | |
494 | #endif | |
495 | ||
496 | /********************************************************************* | |
497 | * FREQUENCY TABLE HELPERS * | |
498 | *********************************************************************/ | |
499 | ||
500 | /* Special Values of .frequency field */ | |
501 | #define CPUFREQ_ENTRY_INVALID ~0u | |
502 | #define CPUFREQ_TABLE_END ~1u | |
503 | /* Special Values of .flags field */ | |
504 | #define CPUFREQ_BOOST_FREQ (1 << 0) | |
505 | ||
506 | struct cpufreq_frequency_table { | |
507 | unsigned int flags; | |
508 | unsigned int driver_data; /* driver specific data, not used by core */ | |
509 | unsigned int frequency; /* kHz - doesn't need to be in ascending | |
510 | * order */ | |
511 | }; | |
512 | ||
513 | #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP) | |
514 | int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
515 | struct cpufreq_frequency_table **table); | |
516 | void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
517 | struct cpufreq_frequency_table **table); | |
518 | #else | |
519 | static inline int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
520 | struct cpufreq_frequency_table | |
521 | **table) | |
522 | { | |
523 | return -EINVAL; | |
524 | } | |
525 | ||
526 | static inline void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
527 | struct cpufreq_frequency_table | |
528 | **table) | |
529 | { | |
530 | } | |
531 | #endif | |
532 | ||
533 | static inline bool cpufreq_next_valid(struct cpufreq_frequency_table **pos) | |
534 | { | |
535 | while ((*pos)->frequency != CPUFREQ_TABLE_END) | |
536 | if ((*pos)->frequency != CPUFREQ_ENTRY_INVALID) | |
537 | return true; | |
538 | else | |
539 | (*pos)++; | |
540 | return false; | |
541 | } | |
542 | ||
543 | /* | |
544 | * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table | |
545 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
546 | * @table: the cpufreq_frequency_table * to iterate over. | |
547 | */ | |
548 | ||
549 | #define cpufreq_for_each_entry(pos, table) \ | |
550 | for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) | |
551 | ||
552 | /* | |
553 | * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table | |
554 | * excluding CPUFREQ_ENTRY_INVALID frequencies. | |
555 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
556 | * @table: the cpufreq_frequency_table * to iterate over. | |
557 | */ | |
558 | ||
559 | #define cpufreq_for_each_valid_entry(pos, table) \ | |
560 | for (pos = table; cpufreq_next_valid(&pos); pos++) | |
561 | ||
562 | int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, | |
563 | struct cpufreq_frequency_table *table); | |
564 | ||
565 | int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, | |
566 | struct cpufreq_frequency_table *table); | |
567 | int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy); | |
568 | ||
569 | int cpufreq_frequency_table_target(struct cpufreq_policy *policy, | |
570 | struct cpufreq_frequency_table *table, | |
571 | unsigned int target_freq, | |
572 | unsigned int relation, | |
573 | unsigned int *index); | |
574 | int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, | |
575 | unsigned int freq); | |
576 | ||
577 | ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); | |
578 | ||
579 | #ifdef CONFIG_CPU_FREQ | |
580 | int cpufreq_boost_trigger_state(int state); | |
581 | int cpufreq_boost_supported(void); | |
582 | int cpufreq_boost_enabled(void); | |
583 | int cpufreq_enable_boost_support(void); | |
584 | bool policy_has_boost_freq(struct cpufreq_policy *policy); | |
585 | #else | |
586 | static inline int cpufreq_boost_trigger_state(int state) | |
587 | { | |
588 | return 0; | |
589 | } | |
590 | static inline int cpufreq_boost_supported(void) | |
591 | { | |
592 | return 0; | |
593 | } | |
594 | static inline int cpufreq_boost_enabled(void) | |
595 | { | |
596 | return 0; | |
597 | } | |
598 | ||
599 | static inline int cpufreq_enable_boost_support(void) | |
600 | { | |
601 | return -EINVAL; | |
602 | } | |
603 | ||
604 | static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) | |
605 | { | |
606 | return false; | |
607 | } | |
608 | #endif | |
609 | /* the following funtion is for cpufreq core use only */ | |
610 | struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu); | |
611 | ||
612 | /* the following are really really optional */ | |
613 | extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; | |
614 | extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs; | |
615 | extern struct freq_attr *cpufreq_generic_attr[]; | |
616 | int cpufreq_table_validate_and_show(struct cpufreq_policy *policy, | |
617 | struct cpufreq_frequency_table *table); | |
618 | ||
619 | unsigned int cpufreq_generic_get(unsigned int cpu); | |
620 | int cpufreq_generic_init(struct cpufreq_policy *policy, | |
621 | struct cpufreq_frequency_table *table, | |
622 | unsigned int transition_latency); | |
623 | #endif /* _LINUX_CPUFREQ_H */ |