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 | |
565ebe80 | 34 | /* Print length for names. Extra 1 space for accommodating '\n' in prints */ |
74aca95d VK |
35 | #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) |
36 | ||
1da177e4 LT |
37 | struct cpufreq_governor; |
38 | ||
da0c6dc0 VK |
39 | enum cpufreq_table_sorting { |
40 | CPUFREQ_TABLE_UNSORTED, | |
41 | CPUFREQ_TABLE_SORTED_ASCENDING, | |
42 | CPUFREQ_TABLE_SORTED_DESCENDING | |
43 | }; | |
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 | ||
c7a7b418 | 53 | struct cpufreq_user_policy { |
1da177e4 LT |
54 | unsigned int min; /* in kHz */ |
55 | unsigned int max; /* in kHz */ | |
1da177e4 LT |
56 | }; |
57 | ||
58 | struct cpufreq_policy { | |
951fc5f4 VK |
59 | /* CPUs sharing clock, require sw coordination */ |
60 | cpumask_var_t cpus; /* Online CPUs only */ | |
61 | cpumask_var_t related_cpus; /* Online + Offline CPUs */ | |
559ed407 | 62 | cpumask_var_t real_cpus; /* Related and present */ |
951fc5f4 | 63 | |
62b36cc1 | 64 | unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs |
3b2d9942 | 65 | should set cpufreq */ |
9d16f207 | 66 | unsigned int cpu; /* cpu managing this policy, must be online */ |
9d16f207 | 67 | |
652ed95d | 68 | struct clk *clk; |
1da177e4 LT |
69 | struct cpufreq_cpuinfo cpuinfo;/* see above */ |
70 | ||
71 | unsigned int min; /* in kHz */ | |
72 | unsigned int max; /* in kHz */ | |
73 | unsigned int cur; /* in kHz, only needed if cpufreq | |
74 | * governors are used */ | |
1c03a2d0 | 75 | unsigned int restore_freq; /* = policy->cur before transition */ |
e28867ea VK |
76 | unsigned int suspend_freq; /* freq to set during suspend */ |
77 | ||
335dc333 | 78 | unsigned int policy; /* see above */ |
69030dd1 | 79 | unsigned int last_policy; /* policy before unplug */ |
1da177e4 | 80 | struct cpufreq_governor *governor; /* see below */ |
7bd353a9 | 81 | void *governor_data; |
4573237b | 82 | char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */ |
1da177e4 | 83 | |
1da177e4 LT |
84 | struct work_struct update; /* if update_policy() needs to be |
85 | * called, but you're in IRQ context */ | |
86 | ||
c7a7b418 | 87 | struct cpufreq_user_policy user_policy; |
e0b3165b | 88 | struct cpufreq_frequency_table *freq_table; |
da0c6dc0 | 89 | enum cpufreq_table_sorting freq_table_sorted; |
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. | |
ad7722da | 102 | */ |
103 | struct rw_semaphore rwsem; | |
12478cf0 | 104 | |
b7898fda RW |
105 | /* |
106 | * Fast switch flags: | |
107 | * - fast_switch_possible should be set by the driver if it can | |
108 | * guarantee that frequency can be changed on any CPU sharing the | |
109 | * policy and that the change will affect all of the policy CPUs then. | |
110 | * - fast_switch_enabled is to be set by governors that support fast | |
565ebe80 | 111 | * frequency switching with the help of cpufreq_enable_fast_switch(). |
b7898fda RW |
112 | */ |
113 | bool fast_switch_possible; | |
114 | bool fast_switch_enabled; | |
115 | ||
1b72e7fd RW |
116 | /* |
117 | * Preferred average time interval between consecutive invocations of | |
118 | * the driver to set the frequency for this policy. To be set by the | |
119 | * scaling driver (0, which is the default, means no preference). | |
120 | */ | |
121 | unsigned int transition_delay_us; | |
122 | ||
99d14d0e VK |
123 | /* |
124 | * Remote DVFS flag (Not added to the driver structure as we don't want | |
125 | * to access another structure from scheduler hotpath). | |
126 | * | |
127 | * Should be set if CPUs can do DVFS on behalf of other CPUs from | |
128 | * different cpufreq policies. | |
129 | */ | |
130 | bool dvfs_possible_from_any_cpu; | |
131 | ||
e3c06236 SM |
132 | /* Cached frequency lookup from cpufreq_driver_resolve_freq. */ |
133 | unsigned int cached_target_freq; | |
134 | int cached_resolved_idx; | |
135 | ||
12478cf0 SB |
136 | /* Synchronization for frequency transitions */ |
137 | bool transition_ongoing; /* Tracks transition status */ | |
138 | spinlock_t transition_lock; | |
139 | wait_queue_head_t transition_wait; | |
ca654dc3 | 140 | struct task_struct *transition_task; /* Task which is doing the transition */ |
413fffc3 | 141 | |
a9aaf291 VK |
142 | /* cpufreq-stats */ |
143 | struct cpufreq_stats *stats; | |
144 | ||
413fffc3 VK |
145 | /* For cpufreq driver's internal use */ |
146 | void *driver_data; | |
5c238a8b AK |
147 | |
148 | /* Pointer to the cooling device if used for thermal mitigation */ | |
149 | struct thermal_cooling_device *cdev; | |
1da177e4 LT |
150 | }; |
151 | ||
df24014a VK |
152 | struct cpufreq_freqs { |
153 | struct cpufreq_policy *policy; | |
154 | unsigned int old; | |
155 | unsigned int new; | |
156 | u8 flags; /* flags of cpufreq_driver, see below. */ | |
157 | }; | |
158 | ||
62b36cc1 | 159 | /* Only for ACPI */ |
46f18e3a VP |
160 | #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ |
161 | #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ | |
162 | #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ | |
163 | #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ | |
1da177e4 | 164 | |
c75b505d | 165 | #ifdef CONFIG_CPU_FREQ |
1f0bd44e | 166 | struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu); |
74aca95d | 167 | struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
3a3e9e06 | 168 | void cpufreq_cpu_put(struct cpufreq_policy *policy); |
c75b505d | 169 | #else |
1f0bd44e RW |
170 | static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu) |
171 | { | |
172 | return NULL; | |
173 | } | |
c75b505d DV |
174 | static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) |
175 | { | |
176 | return NULL; | |
177 | } | |
178 | static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } | |
179 | #endif | |
74aca95d | 180 | |
9083e498 RW |
181 | static inline bool policy_is_inactive(struct cpufreq_policy *policy) |
182 | { | |
183 | return cpumask_empty(policy->cpus); | |
184 | } | |
185 | ||
2624f90c FB |
186 | static inline bool policy_is_shared(struct cpufreq_policy *policy) |
187 | { | |
188 | return cpumask_weight(policy->cpus) > 1; | |
189 | } | |
190 | ||
74aca95d VK |
191 | /* /sys/devices/system/cpu/cpufreq: entry point for global variables */ |
192 | extern struct kobject *cpufreq_global_kobject; | |
1da177e4 | 193 | |
74aca95d VK |
194 | #ifdef CONFIG_CPU_FREQ |
195 | unsigned int cpufreq_get(unsigned int cpu); | |
196 | unsigned int cpufreq_quick_get(unsigned int cpu); | |
197 | unsigned int cpufreq_quick_get_max(unsigned int cpu); | |
198 | void disable_cpufreq(void); | |
1da177e4 | 199 | |
74aca95d | 200 | u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); |
9083e498 RW |
201 | |
202 | struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu); | |
203 | void cpufreq_cpu_release(struct cpufreq_policy *policy); | |
74aca95d | 204 | int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); |
9083e498 RW |
205 | int cpufreq_set_policy(struct cpufreq_policy *policy, |
206 | struct cpufreq_policy *new_policy); | |
30248fef | 207 | void cpufreq_update_policy(unsigned int cpu); |
5a25e3f7 | 208 | void cpufreq_update_limits(unsigned int cpu); |
74aca95d VK |
209 | bool have_governor_per_policy(void); |
210 | struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); | |
b7898fda | 211 | void cpufreq_enable_fast_switch(struct cpufreq_policy *policy); |
6c9d9c81 | 212 | void cpufreq_disable_fast_switch(struct cpufreq_policy *policy); |
74aca95d VK |
213 | #else |
214 | static inline unsigned int cpufreq_get(unsigned int cpu) | |
1da177e4 | 215 | { |
74aca95d VK |
216 | return 0; |
217 | } | |
218 | static inline unsigned int cpufreq_quick_get(unsigned int cpu) | |
219 | { | |
220 | return 0; | |
221 | } | |
222 | static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) | |
223 | { | |
224 | return 0; | |
225 | } | |
226 | static inline void disable_cpufreq(void) { } | |
1da177e4 | 227 | #endif |
1da177e4 | 228 | |
1aefc75b RW |
229 | #ifdef CONFIG_CPU_FREQ_STAT |
230 | void cpufreq_stats_create_table(struct cpufreq_policy *policy); | |
231 | void cpufreq_stats_free_table(struct cpufreq_policy *policy); | |
232 | void cpufreq_stats_record_transition(struct cpufreq_policy *policy, | |
233 | unsigned int new_freq); | |
234 | #else | |
235 | static inline void cpufreq_stats_create_table(struct cpufreq_policy *policy) { } | |
236 | static inline void cpufreq_stats_free_table(struct cpufreq_policy *policy) { } | |
237 | static inline void cpufreq_stats_record_transition(struct cpufreq_policy *policy, | |
238 | unsigned int new_freq) { } | |
239 | #endif /* CONFIG_CPU_FREQ_STAT */ | |
240 | ||
1da177e4 | 241 | /********************************************************************* |
74aca95d | 242 | * CPUFREQ DRIVER INTERFACE * |
1da177e4 LT |
243 | *********************************************************************/ |
244 | ||
74aca95d VK |
245 | #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
246 | #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ | |
5b0c0b16 | 247 | #define CPUFREQ_RELATION_C 2 /* closest frequency to target */ |
1da177e4 | 248 | |
74aca95d VK |
249 | struct freq_attr { |
250 | struct attribute attr; | |
251 | ssize_t (*show)(struct cpufreq_policy *, char *); | |
252 | ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); | |
1da177e4 LT |
253 | }; |
254 | ||
74aca95d VK |
255 | #define cpufreq_freq_attr_ro(_name) \ |
256 | static struct freq_attr _name = \ | |
257 | __ATTR(_name, 0444, show_##_name, NULL) | |
1da177e4 | 258 | |
74aca95d VK |
259 | #define cpufreq_freq_attr_ro_perm(_name, _perm) \ |
260 | static struct freq_attr _name = \ | |
261 | __ATTR(_name, _perm, show_##_name, NULL) | |
1da177e4 | 262 | |
74aca95d VK |
263 | #define cpufreq_freq_attr_rw(_name) \ |
264 | static struct freq_attr _name = \ | |
265 | __ATTR(_name, 0644, show_##_name, store_##_name) | |
266 | ||
ee7930ee MM |
267 | #define cpufreq_freq_attr_wo(_name) \ |
268 | static struct freq_attr _name = \ | |
269 | __ATTR(_name, 0200, NULL, store_##_name) | |
270 | ||
74aca95d | 271 | #define define_one_global_ro(_name) \ |
625c85a6 | 272 | static struct kobj_attribute _name = \ |
74aca95d VK |
273 | __ATTR(_name, 0444, show_##_name, NULL) |
274 | ||
275 | #define define_one_global_rw(_name) \ | |
625c85a6 | 276 | static struct kobj_attribute _name = \ |
74aca95d | 277 | __ATTR(_name, 0644, show_##_name, store_##_name) |
1da177e4 | 278 | |
1da177e4 LT |
279 | |
280 | struct cpufreq_driver { | |
90452e61 VK |
281 | char name[CPUFREQ_NAME_LEN]; |
282 | u8 flags; | |
283 | void *driver_data; | |
1da177e4 LT |
284 | |
285 | /* needed by all drivers */ | |
90452e61 VK |
286 | int (*init)(struct cpufreq_policy *policy); |
287 | int (*verify)(struct cpufreq_policy *policy); | |
1da177e4 LT |
288 | |
289 | /* define one out of two */ | |
90452e61 | 290 | int (*setpolicy)(struct cpufreq_policy *policy); |
1c03a2d0 VK |
291 | |
292 | /* | |
293 | * On failure, should always restore frequency to policy->restore_freq | |
294 | * (i.e. old freq). | |
295 | */ | |
90452e61 VK |
296 | int (*target)(struct cpufreq_policy *policy, |
297 | unsigned int target_freq, | |
298 | unsigned int relation); /* Deprecated */ | |
299 | int (*target_index)(struct cpufreq_policy *policy, | |
300 | unsigned int index); | |
b7898fda RW |
301 | unsigned int (*fast_switch)(struct cpufreq_policy *policy, |
302 | unsigned int target_freq); | |
e3c06236 SM |
303 | |
304 | /* | |
305 | * Caches and returns the lowest driver-supported frequency greater than | |
306 | * or equal to the target frequency, subject to any driver limitations. | |
307 | * Does not set the frequency. Only to be implemented for drivers with | |
308 | * target(). | |
309 | */ | |
310 | unsigned int (*resolve_freq)(struct cpufreq_policy *policy, | |
311 | unsigned int target_freq); | |
312 | ||
1c03a2d0 VK |
313 | /* |
314 | * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION | |
315 | * unset. | |
316 | * | |
317 | * get_intermediate should return a stable intermediate frequency | |
318 | * platform wants to switch to and target_intermediate() should set CPU | |
319 | * to to that frequency, before jumping to the frequency corresponding | |
320 | * to 'index'. Core will take care of sending notifications and driver | |
321 | * doesn't have to handle them in target_intermediate() or | |
322 | * target_index(). | |
323 | * | |
324 | * Drivers can return '0' from get_intermediate() in case they don't | |
325 | * wish to switch to intermediate frequency for some target frequency. | |
326 | * In that case core will directly call ->target_index(). | |
327 | */ | |
90452e61 VK |
328 | unsigned int (*get_intermediate)(struct cpufreq_policy *policy, |
329 | unsigned int index); | |
330 | int (*target_intermediate)(struct cpufreq_policy *policy, | |
331 | unsigned int index); | |
1da177e4 LT |
332 | |
333 | /* should be defined, if possible */ | |
90452e61 | 334 | unsigned int (*get)(unsigned int cpu); |
1da177e4 | 335 | |
5a25e3f7 RW |
336 | /* Called to update policy limits on firmware notifications. */ |
337 | void (*update_limits)(unsigned int cpu); | |
338 | ||
1da177e4 | 339 | /* optional */ |
90452e61 | 340 | int (*bios_limit)(int cpu, unsigned int *limit); |
bf0b90e3 | 341 | |
91a12e91 VK |
342 | int (*online)(struct cpufreq_policy *policy); |
343 | int (*offline)(struct cpufreq_policy *policy); | |
90452e61 VK |
344 | int (*exit)(struct cpufreq_policy *policy); |
345 | void (*stop_cpu)(struct cpufreq_policy *policy); | |
346 | int (*suspend)(struct cpufreq_policy *policy); | |
347 | int (*resume)(struct cpufreq_policy *policy); | |
7c45cf31 VK |
348 | |
349 | /* Will be called after the driver is fully initialized */ | |
350 | void (*ready)(struct cpufreq_policy *policy); | |
351 | ||
90452e61 | 352 | struct freq_attr **attr; |
6f19efc0 LM |
353 | |
354 | /* platform specific boost support code */ | |
90452e61 VK |
355 | bool boost_enabled; |
356 | int (*set_boost)(int state); | |
1da177e4 LT |
357 | }; |
358 | ||
359 | /* flags */ | |
8321be6a AK |
360 | |
361 | /* driver isn't removed even if all ->init() calls failed */ | |
362 | #define CPUFREQ_STICKY BIT(0) | |
363 | ||
364 | /* loops_per_jiffy or other kernel "constants" aren't affected by frequency transitions */ | |
365 | #define CPUFREQ_CONST_LOOPS BIT(1) | |
366 | ||
367 | /* don't warn on suspend/resume speed mismatches */ | |
368 | #define CPUFREQ_PM_NO_WARN BIT(2) | |
1da177e4 | 369 | |
0b981e70 VK |
370 | /* |
371 | * This should be set by platforms having multiple clock-domains, i.e. | |
372 | * supporting multiple policies. With this sysfs directories of governor would | |
373 | * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same | |
374 | * governor with different tunables for different clusters. | |
375 | */ | |
8321be6a | 376 | #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY BIT(3) |
0b981e70 | 377 | |
7dbf694d VK |
378 | /* |
379 | * Driver will do POSTCHANGE notifications from outside of their ->target() | |
380 | * routine and so must set cpufreq_driver->flags with this flag, so that core | |
381 | * can handle them specially. | |
382 | */ | |
8321be6a | 383 | #define CPUFREQ_ASYNC_NOTIFICATION BIT(4) |
7dbf694d | 384 | |
ae6b4271 VK |
385 | /* |
386 | * Set by drivers which want cpufreq core to check if CPU is running at a | |
387 | * frequency present in freq-table exposed by the driver. For these drivers if | |
388 | * CPU is found running at an out of table freq, we will try to set it to a freq | |
389 | * from the table. And if that fails, we will stop further boot process by | |
390 | * issuing a BUG_ON(). | |
391 | */ | |
8321be6a | 392 | #define CPUFREQ_NEED_INITIAL_FREQ_CHECK BIT(5) |
ae6b4271 | 393 | |
fe829ed8 VK |
394 | /* |
395 | * Set by drivers to disallow use of governors with "dynamic_switching" flag | |
396 | * set. | |
397 | */ | |
8321be6a | 398 | #define CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING BIT(6) |
fe829ed8 | 399 | |
5c238a8b AK |
400 | /* |
401 | * Set by drivers that want the core to automatically register the cpufreq | |
402 | * driver as a thermal cooling device. | |
403 | */ | |
404 | #define CPUFREQ_IS_COOLING_DEV BIT(7) | |
405 | ||
221dee28 LT |
406 | int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
407 | int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); | |
1da177e4 | 408 | |
74aca95d | 409 | const char *cpufreq_get_current_driver(void); |
51315cdf | 410 | void *cpufreq_get_driver_data(void); |
1da177e4 | 411 | |
bb176f7d VK |
412 | static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, |
413 | unsigned int min, unsigned int max) | |
1da177e4 LT |
414 | { |
415 | if (policy->min < min) | |
416 | policy->min = min; | |
417 | if (policy->max < min) | |
418 | policy->max = min; | |
419 | if (policy->min > max) | |
420 | policy->min = max; | |
421 | if (policy->max > max) | |
422 | policy->max = max; | |
423 | if (policy->min > policy->max) | |
424 | policy->min = policy->max; | |
425 | return; | |
426 | } | |
427 | ||
be49e346 VK |
428 | static inline void |
429 | cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) | |
430 | { | |
431 | cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, | |
432 | policy->cpuinfo.max_freq); | |
433 | } | |
434 | ||
2f0aea93 VK |
435 | #ifdef CONFIG_CPU_FREQ |
436 | void cpufreq_suspend(void); | |
437 | void cpufreq_resume(void); | |
e28867ea | 438 | int cpufreq_generic_suspend(struct cpufreq_policy *policy); |
2f0aea93 VK |
439 | #else |
440 | static inline void cpufreq_suspend(void) {} | |
441 | static inline void cpufreq_resume(void) {} | |
442 | #endif | |
443 | ||
74aca95d VK |
444 | /********************************************************************* |
445 | * CPUFREQ NOTIFIER INTERFACE * | |
446 | *********************************************************************/ | |
6dad2a29 | 447 | |
74aca95d VK |
448 | #define CPUFREQ_TRANSITION_NOTIFIER (0) |
449 | #define CPUFREQ_POLICY_NOTIFIER (1) | |
1da177e4 | 450 | |
74aca95d VK |
451 | /* Transition notifiers */ |
452 | #define CPUFREQ_PRECHANGE (0) | |
453 | #define CPUFREQ_POSTCHANGE (1) | |
6dad2a29 | 454 | |
74aca95d VK |
455 | /* Policy Notifiers */ |
456 | #define CPUFREQ_ADJUST (0) | |
6bfb7c74 | 457 | #define CPUFREQ_NOTIFY (1) |
6dad2a29 | 458 | |
74aca95d VK |
459 | #ifdef CONFIG_CPU_FREQ |
460 | int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); | |
461 | int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); | |
6dad2a29 | 462 | |
12478cf0 SB |
463 | void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, |
464 | struct cpufreq_freqs *freqs); | |
465 | void cpufreq_freq_transition_end(struct cpufreq_policy *policy, | |
466 | struct cpufreq_freqs *freqs, int transition_failed); | |
1da177e4 | 467 | |
74aca95d VK |
468 | #else /* CONFIG_CPU_FREQ */ |
469 | static inline int cpufreq_register_notifier(struct notifier_block *nb, | |
470 | unsigned int list) | |
2eca40a8 RD |
471 | { |
472 | return 0; | |
473 | } | |
74aca95d VK |
474 | static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
475 | unsigned int list) | |
95235ca2 VP |
476 | { |
477 | return 0; | |
478 | } | |
74aca95d VK |
479 | #endif /* !CONFIG_CPU_FREQ */ |
480 | ||
481 | /** | |
482 | * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch | |
483 | * safe) | |
484 | * @old: old value | |
485 | * @div: divisor | |
486 | * @mult: multiplier | |
487 | * | |
488 | * | |
489 | * new = old * mult / div | |
490 | */ | |
491 | static inline unsigned long cpufreq_scale(unsigned long old, u_int div, | |
492 | u_int mult) | |
3d737108 | 493 | { |
74aca95d VK |
494 | #if BITS_PER_LONG == 32 |
495 | u64 result = ((u64) old) * ((u64) mult); | |
496 | do_div(result, div); | |
497 | return (unsigned long) result; | |
498 | ||
499 | #elif BITS_PER_LONG == 64 | |
500 | unsigned long result = old * ((u64) mult); | |
501 | result /= div; | |
502 | return result; | |
95235ca2 | 503 | #endif |
74aca95d | 504 | } |
95235ca2 | 505 | |
1da177e4 | 506 | /********************************************************************* |
74aca95d | 507 | * CPUFREQ GOVERNORS * |
1da177e4 LT |
508 | *********************************************************************/ |
509 | ||
74aca95d VK |
510 | /* |
511 | * If (cpufreq_driver->target) exists, the ->governor decides what frequency | |
512 | * within the limits is used. If (cpufreq_driver->setpolicy> exists, these | |
513 | * two generic policies are available: | |
514 | */ | |
515 | #define CPUFREQ_POLICY_POWERSAVE (1) | |
516 | #define CPUFREQ_POLICY_PERFORMANCE (2) | |
517 | ||
379480d8 RW |
518 | /* |
519 | * The polling frequency depends on the capability of the processor. Default | |
520 | * polling frequency is 1000 times the transition latency of the processor. The | |
521 | * ondemand governor will work on any processor with transition latency <= 10ms, | |
522 | * using appropriate sampling rate. | |
379480d8 | 523 | */ |
379480d8 | 524 | #define LATENCY_MULTIPLIER (1000) |
379480d8 | 525 | |
74aca95d VK |
526 | struct cpufreq_governor { |
527 | char name[CPUFREQ_NAME_LEN]; | |
e788892b RW |
528 | int (*init)(struct cpufreq_policy *policy); |
529 | void (*exit)(struct cpufreq_policy *policy); | |
530 | int (*start)(struct cpufreq_policy *policy); | |
531 | void (*stop)(struct cpufreq_policy *policy); | |
532 | void (*limits)(struct cpufreq_policy *policy); | |
74aca95d VK |
533 | ssize_t (*show_setspeed) (struct cpufreq_policy *policy, |
534 | char *buf); | |
535 | int (*store_setspeed) (struct cpufreq_policy *policy, | |
536 | unsigned int freq); | |
ed4676e2 VK |
537 | /* For governors which change frequency dynamically by themselves */ |
538 | bool dynamic_switching; | |
74aca95d VK |
539 | struct list_head governor_list; |
540 | struct module *owner; | |
541 | }; | |
542 | ||
543 | /* Pass a target to the cpufreq driver */ | |
b7898fda RW |
544 | unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy, |
545 | unsigned int target_freq); | |
74aca95d VK |
546 | int cpufreq_driver_target(struct cpufreq_policy *policy, |
547 | unsigned int target_freq, | |
548 | unsigned int relation); | |
549 | int __cpufreq_driver_target(struct cpufreq_policy *policy, | |
550 | unsigned int target_freq, | |
551 | unsigned int relation); | |
e3c06236 SM |
552 | unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy, |
553 | unsigned int target_freq); | |
aa7519af | 554 | unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy); |
74aca95d VK |
555 | int cpufreq_register_governor(struct cpufreq_governor *governor); |
556 | void cpufreq_unregister_governor(struct cpufreq_governor *governor); | |
557 | ||
de1df26b RW |
558 | struct cpufreq_governor *cpufreq_default_governor(void); |
559 | struct cpufreq_governor *cpufreq_fallback_governor(void); | |
1da177e4 | 560 | |
bf2be2de VK |
561 | static inline void cpufreq_policy_apply_limits(struct cpufreq_policy *policy) |
562 | { | |
563 | if (policy->max < policy->cur) | |
564 | __cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H); | |
565 | else if (policy->min > policy->cur) | |
566 | __cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L); | |
567 | } | |
568 | ||
66893b6a RW |
569 | /* Governor attribute set */ |
570 | struct gov_attr_set { | |
571 | struct kobject kobj; | |
572 | struct list_head policy_list; | |
573 | struct mutex update_lock; | |
574 | int usage_count; | |
575 | }; | |
576 | ||
577 | /* sysfs ops for cpufreq governors */ | |
578 | extern const struct sysfs_ops governor_sysfs_ops; | |
579 | ||
580 | void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node); | |
581 | void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node); | |
582 | unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node); | |
583 | ||
584 | /* Governor sysfs attribute */ | |
585 | struct governor_attr { | |
586 | struct attribute attr; | |
587 | ssize_t (*show)(struct gov_attr_set *attr_set, char *buf); | |
588 | ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf, | |
589 | size_t count); | |
590 | }; | |
591 | ||
03639978 | 592 | static inline bool cpufreq_this_cpu_can_update(struct cpufreq_policy *policy) |
674e7541 | 593 | { |
99d14d0e VK |
594 | /* |
595 | * Allow remote callbacks if: | |
596 | * - dvfs_possible_from_any_cpu flag is set | |
597 | * - the local and remote CPUs share cpufreq policy | |
598 | */ | |
d6344d4b RW |
599 | return policy->dvfs_possible_from_any_cpu || |
600 | cpumask_test_cpu(smp_processor_id(), policy->cpus); | |
674e7541 VK |
601 | } |
602 | ||
1da177e4 LT |
603 | /********************************************************************* |
604 | * FREQUENCY TABLE HELPERS * | |
605 | *********************************************************************/ | |
606 | ||
7f4b0461 | 607 | /* Special Values of .frequency field */ |
2b1987a9 BH |
608 | #define CPUFREQ_ENTRY_INVALID ~0u |
609 | #define CPUFREQ_TABLE_END ~1u | |
7f4b0461 VK |
610 | /* Special Values of .flags field */ |
611 | #define CPUFREQ_BOOST_FREQ (1 << 0) | |
1da177e4 LT |
612 | |
613 | struct cpufreq_frequency_table { | |
7f4b0461 | 614 | unsigned int flags; |
50701588 | 615 | unsigned int driver_data; /* driver specific data, not used by core */ |
1da177e4 LT |
616 | unsigned int frequency; /* kHz - doesn't need to be in ascending |
617 | * order */ | |
618 | }; | |
619 | ||
a0dd7b79 NM |
620 | #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP) |
621 | int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
622 | struct cpufreq_frequency_table **table); | |
623 | void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
624 | struct cpufreq_frequency_table **table); | |
625 | #else | |
626 | static inline int dev_pm_opp_init_cpufreq_table(struct device *dev, | |
627 | struct cpufreq_frequency_table | |
628 | **table) | |
629 | { | |
630 | return -EINVAL; | |
631 | } | |
632 | ||
633 | static inline void dev_pm_opp_free_cpufreq_table(struct device *dev, | |
634 | struct cpufreq_frequency_table | |
635 | **table) | |
636 | { | |
637 | } | |
638 | #endif | |
639 | ||
27e289dc SK |
640 | /* |
641 | * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table | |
642 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
643 | * @table: the cpufreq_frequency_table * to iterate over. | |
644 | */ | |
645 | ||
646 | #define cpufreq_for_each_entry(pos, table) \ | |
647 | for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) | |
648 | ||
ffd81dcf DB |
649 | /* |
650 | * cpufreq_for_each_entry_idx - iterate over a cpufreq_frequency_table | |
651 | * with index | |
652 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
653 | * @table: the cpufreq_frequency_table * to iterate over. | |
654 | * @idx: the table entry currently being processed | |
655 | */ | |
656 | ||
657 | #define cpufreq_for_each_entry_idx(pos, table, idx) \ | |
658 | for (pos = table, idx = 0; pos->frequency != CPUFREQ_TABLE_END; \ | |
659 | pos++, idx++) | |
660 | ||
27e289dc SK |
661 | /* |
662 | * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table | |
663 | * excluding CPUFREQ_ENTRY_INVALID frequencies. | |
664 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
665 | * @table: the cpufreq_frequency_table * to iterate over. | |
666 | */ | |
667 | ||
34b08705 RW |
668 | #define cpufreq_for_each_valid_entry(pos, table) \ |
669 | for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \ | |
670 | if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ | |
671 | continue; \ | |
672 | else | |
27e289dc | 673 | |
ffd81dcf DB |
674 | /* |
675 | * cpufreq_for_each_valid_entry_idx - iterate with index over a cpufreq | |
676 | * frequency_table excluding CPUFREQ_ENTRY_INVALID frequencies. | |
677 | * @pos: the cpufreq_frequency_table * to use as a loop cursor. | |
678 | * @table: the cpufreq_frequency_table * to iterate over. | |
679 | * @idx: the table entry currently being processed | |
680 | */ | |
681 | ||
682 | #define cpufreq_for_each_valid_entry_idx(pos, table, idx) \ | |
683 | cpufreq_for_each_entry_idx(pos, table, idx) \ | |
684 | if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ | |
685 | continue; \ | |
686 | else | |
687 | ||
688 | ||
1da177e4 LT |
689 | int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, |
690 | struct cpufreq_frequency_table *table); | |
691 | ||
692 | int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, | |
693 | struct cpufreq_frequency_table *table); | |
18434512 | 694 | int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy); |
1da177e4 | 695 | |
da0c6dc0 VK |
696 | int cpufreq_table_index_unsorted(struct cpufreq_policy *policy, |
697 | unsigned int target_freq, | |
698 | unsigned int relation); | |
d3916691 VK |
699 | int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, |
700 | unsigned int freq); | |
1da177e4 | 701 | |
74aca95d VK |
702 | ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); |
703 | ||
6f19efc0 LM |
704 | #ifdef CONFIG_CPU_FREQ |
705 | int cpufreq_boost_trigger_state(int state); | |
6f19efc0 | 706 | int cpufreq_boost_enabled(void); |
44139ed4 VK |
707 | int cpufreq_enable_boost_support(void); |
708 | bool policy_has_boost_freq(struct cpufreq_policy *policy); | |
da0c6dc0 VK |
709 | |
710 | /* Find lowest freq at or above target in a table in ascending order */ | |
711 | static inline int cpufreq_table_find_index_al(struct cpufreq_policy *policy, | |
712 | unsigned int target_freq) | |
713 | { | |
714 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 715 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 716 | unsigned int freq; |
ffd81dcf | 717 | int idx, best = -1; |
da0c6dc0 | 718 | |
ffd81dcf | 719 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 720 | freq = pos->frequency; |
da0c6dc0 VK |
721 | |
722 | if (freq >= target_freq) | |
ffd81dcf | 723 | return idx; |
da0c6dc0 | 724 | |
ffd81dcf | 725 | best = idx; |
da0c6dc0 VK |
726 | } |
727 | ||
ffd81dcf | 728 | return best; |
da0c6dc0 VK |
729 | } |
730 | ||
731 | /* Find lowest freq at or above target in a table in descending order */ | |
732 | static inline int cpufreq_table_find_index_dl(struct cpufreq_policy *policy, | |
733 | unsigned int target_freq) | |
734 | { | |
735 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 736 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 737 | unsigned int freq; |
ffd81dcf | 738 | int idx, best = -1; |
da0c6dc0 | 739 | |
ffd81dcf | 740 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 741 | freq = pos->frequency; |
da0c6dc0 VK |
742 | |
743 | if (freq == target_freq) | |
ffd81dcf | 744 | return idx; |
da0c6dc0 VK |
745 | |
746 | if (freq > target_freq) { | |
ffd81dcf | 747 | best = idx; |
da0c6dc0 VK |
748 | continue; |
749 | } | |
750 | ||
751 | /* No freq found above target_freq */ | |
ffd81dcf DB |
752 | if (best == -1) |
753 | return idx; | |
da0c6dc0 | 754 | |
ffd81dcf | 755 | return best; |
da0c6dc0 VK |
756 | } |
757 | ||
ffd81dcf | 758 | return best; |
da0c6dc0 VK |
759 | } |
760 | ||
761 | /* Works only on sorted freq-tables */ | |
762 | static inline int cpufreq_table_find_index_l(struct cpufreq_policy *policy, | |
763 | unsigned int target_freq) | |
764 | { | |
765 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
766 | ||
767 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
768 | return cpufreq_table_find_index_al(policy, target_freq); | |
769 | else | |
770 | return cpufreq_table_find_index_dl(policy, target_freq); | |
771 | } | |
772 | ||
773 | /* Find highest freq at or below target in a table in ascending order */ | |
774 | static inline int cpufreq_table_find_index_ah(struct cpufreq_policy *policy, | |
775 | unsigned int target_freq) | |
776 | { | |
777 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 778 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 779 | unsigned int freq; |
ffd81dcf | 780 | int idx, best = -1; |
da0c6dc0 | 781 | |
ffd81dcf | 782 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 783 | freq = pos->frequency; |
da0c6dc0 VK |
784 | |
785 | if (freq == target_freq) | |
ffd81dcf | 786 | return idx; |
da0c6dc0 VK |
787 | |
788 | if (freq < target_freq) { | |
ffd81dcf | 789 | best = idx; |
da0c6dc0 VK |
790 | continue; |
791 | } | |
792 | ||
793 | /* No freq found below target_freq */ | |
ffd81dcf DB |
794 | if (best == -1) |
795 | return idx; | |
da0c6dc0 | 796 | |
ffd81dcf | 797 | return best; |
da0c6dc0 VK |
798 | } |
799 | ||
ffd81dcf | 800 | return best; |
da0c6dc0 VK |
801 | } |
802 | ||
803 | /* Find highest freq at or below target in a table in descending order */ | |
804 | static inline int cpufreq_table_find_index_dh(struct cpufreq_policy *policy, | |
805 | unsigned int target_freq) | |
806 | { | |
807 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 808 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 809 | unsigned int freq; |
ffd81dcf | 810 | int idx, best = -1; |
da0c6dc0 | 811 | |
ffd81dcf | 812 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 813 | freq = pos->frequency; |
da0c6dc0 VK |
814 | |
815 | if (freq <= target_freq) | |
ffd81dcf | 816 | return idx; |
da0c6dc0 | 817 | |
ffd81dcf | 818 | best = idx; |
da0c6dc0 VK |
819 | } |
820 | ||
ffd81dcf | 821 | return best; |
da0c6dc0 VK |
822 | } |
823 | ||
824 | /* Works only on sorted freq-tables */ | |
825 | static inline int cpufreq_table_find_index_h(struct cpufreq_policy *policy, | |
826 | unsigned int target_freq) | |
827 | { | |
828 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
829 | ||
830 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
831 | return cpufreq_table_find_index_ah(policy, target_freq); | |
832 | else | |
833 | return cpufreq_table_find_index_dh(policy, target_freq); | |
834 | } | |
835 | ||
836 | /* Find closest freq to target in a table in ascending order */ | |
837 | static inline int cpufreq_table_find_index_ac(struct cpufreq_policy *policy, | |
838 | unsigned int target_freq) | |
839 | { | |
840 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 841 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 842 | unsigned int freq; |
ffd81dcf | 843 | int idx, best = -1; |
da0c6dc0 | 844 | |
ffd81dcf | 845 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 846 | freq = pos->frequency; |
da0c6dc0 VK |
847 | |
848 | if (freq == target_freq) | |
ffd81dcf | 849 | return idx; |
da0c6dc0 VK |
850 | |
851 | if (freq < target_freq) { | |
ffd81dcf | 852 | best = idx; |
da0c6dc0 VK |
853 | continue; |
854 | } | |
855 | ||
856 | /* No freq found below target_freq */ | |
ffd81dcf DB |
857 | if (best == -1) |
858 | return idx; | |
da0c6dc0 VK |
859 | |
860 | /* Choose the closest freq */ | |
ffd81dcf DB |
861 | if (target_freq - table[best].frequency > freq - target_freq) |
862 | return idx; | |
da0c6dc0 | 863 | |
ffd81dcf | 864 | return best; |
da0c6dc0 VK |
865 | } |
866 | ||
ffd81dcf | 867 | return best; |
da0c6dc0 VK |
868 | } |
869 | ||
870 | /* Find closest freq to target in a table in descending order */ | |
871 | static inline int cpufreq_table_find_index_dc(struct cpufreq_policy *policy, | |
872 | unsigned int target_freq) | |
873 | { | |
874 | struct cpufreq_frequency_table *table = policy->freq_table; | |
ffd81dcf | 875 | struct cpufreq_frequency_table *pos; |
da0c6dc0 | 876 | unsigned int freq; |
ffd81dcf | 877 | int idx, best = -1; |
da0c6dc0 | 878 | |
ffd81dcf | 879 | cpufreq_for_each_valid_entry_idx(pos, table, idx) { |
899bb664 | 880 | freq = pos->frequency; |
da0c6dc0 VK |
881 | |
882 | if (freq == target_freq) | |
ffd81dcf | 883 | return idx; |
da0c6dc0 VK |
884 | |
885 | if (freq > target_freq) { | |
ffd81dcf | 886 | best = idx; |
da0c6dc0 VK |
887 | continue; |
888 | } | |
889 | ||
890 | /* No freq found above target_freq */ | |
ffd81dcf DB |
891 | if (best == -1) |
892 | return idx; | |
da0c6dc0 VK |
893 | |
894 | /* Choose the closest freq */ | |
ffd81dcf DB |
895 | if (table[best].frequency - target_freq > target_freq - freq) |
896 | return idx; | |
da0c6dc0 | 897 | |
ffd81dcf | 898 | return best; |
da0c6dc0 VK |
899 | } |
900 | ||
ffd81dcf | 901 | return best; |
da0c6dc0 VK |
902 | } |
903 | ||
904 | /* Works only on sorted freq-tables */ | |
905 | static inline int cpufreq_table_find_index_c(struct cpufreq_policy *policy, | |
906 | unsigned int target_freq) | |
907 | { | |
908 | target_freq = clamp_val(target_freq, policy->min, policy->max); | |
909 | ||
910 | if (policy->freq_table_sorted == CPUFREQ_TABLE_SORTED_ASCENDING) | |
911 | return cpufreq_table_find_index_ac(policy, target_freq); | |
912 | else | |
913 | return cpufreq_table_find_index_dc(policy, target_freq); | |
914 | } | |
915 | ||
916 | static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy, | |
917 | unsigned int target_freq, | |
918 | unsigned int relation) | |
919 | { | |
920 | if (unlikely(policy->freq_table_sorted == CPUFREQ_TABLE_UNSORTED)) | |
921 | return cpufreq_table_index_unsorted(policy, target_freq, | |
922 | relation); | |
923 | ||
924 | switch (relation) { | |
925 | case CPUFREQ_RELATION_L: | |
926 | return cpufreq_table_find_index_l(policy, target_freq); | |
927 | case CPUFREQ_RELATION_H: | |
928 | return cpufreq_table_find_index_h(policy, target_freq); | |
929 | case CPUFREQ_RELATION_C: | |
930 | return cpufreq_table_find_index_c(policy, target_freq); | |
931 | default: | |
932 | pr_err("%s: Invalid relation: %d\n", __func__, relation); | |
933 | return -EINVAL; | |
934 | } | |
935 | } | |
55d85293 VK |
936 | |
937 | static inline int cpufreq_table_count_valid_entries(const struct cpufreq_policy *policy) | |
938 | { | |
939 | struct cpufreq_frequency_table *pos; | |
940 | int count = 0; | |
941 | ||
942 | if (unlikely(!policy->freq_table)) | |
943 | return 0; | |
944 | ||
945 | cpufreq_for_each_valid_entry(pos, policy->freq_table) | |
946 | count++; | |
947 | ||
948 | return count; | |
949 | } | |
6f19efc0 LM |
950 | #else |
951 | static inline int cpufreq_boost_trigger_state(int state) | |
952 | { | |
953 | return 0; | |
954 | } | |
6f19efc0 LM |
955 | static inline int cpufreq_boost_enabled(void) |
956 | { | |
957 | return 0; | |
958 | } | |
44139ed4 VK |
959 | |
960 | static inline int cpufreq_enable_boost_support(void) | |
961 | { | |
962 | return -EINVAL; | |
963 | } | |
964 | ||
965 | static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) | |
966 | { | |
967 | return false; | |
968 | } | |
6f19efc0 | 969 | #endif |
1da177e4 | 970 | |
531b5c9f QP |
971 | #if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL) |
972 | void sched_cpufreq_governor_change(struct cpufreq_policy *policy, | |
973 | struct cpufreq_governor *old_gov); | |
974 | #else | |
975 | static inline void sched_cpufreq_governor_change(struct cpufreq_policy *policy, | |
976 | struct cpufreq_governor *old_gov) { } | |
977 | #endif | |
978 | ||
7d5905dc | 979 | extern void arch_freq_prepare_all(void); |
f8475cef LB |
980 | extern unsigned int arch_freq_get_on_cpu(int cpu); |
981 | ||
e7d5459d DE |
982 | extern void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq, |
983 | unsigned long max_freq); | |
984 | ||
1da177e4 LT |
985 | /* the following are really really optional */ |
986 | extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; | |
21c36d35 | 987 | extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs; |
18434512 | 988 | extern struct freq_attr *cpufreq_generic_attr[]; |
d417e069 | 989 | int cpufreq_table_validate_and_sort(struct cpufreq_policy *policy); |
f4fd3797 | 990 | |
652ed95d | 991 | unsigned int cpufreq_generic_get(unsigned int cpu); |
70e9e778 VK |
992 | int cpufreq_generic_init(struct cpufreq_policy *policy, |
993 | struct cpufreq_frequency_table *table, | |
994 | unsigned int transition_latency); | |
1da177e4 | 995 | #endif /* _LINUX_CPUFREQ_H */ |