Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Viresh Kumar | bb176f7 | 2013-06-19 14:19:33 +0530 | [diff] [blame^] | 2 | * linux/include/linux/cpufreq.h |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Viresh Kumar | bb176f7 | 2013-06-19 14:19:33 +0530 | [diff] [blame^] | 4 | * Copyright (C) 2001 Russell King |
| 5 | * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 6 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
viresh kumar | 2aacdff | 2012-10-23 01:28:05 +0200 | [diff] [blame] | 14 | #include <asm/cputime.h> |
Arjan van de Ven | 83933af | 2006-01-14 16:01:49 +0100 | [diff] [blame] | 15 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/notifier.h> |
| 17 | #include <linux/threads.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/kobject.h> |
| 19 | #include <linux/sysfs.h> |
| 20 | #include <linux/completion.h> |
| 21 | #include <linux/workqueue.h> |
| 22 | #include <linux/cpumask.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 23 | #include <asm/div64.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | #define CPUFREQ_NAME_LEN 16 |
viresh kumar | 4b972f0 | 2012-10-23 01:23:43 +0200 | [diff] [blame] | 26 | /* Print length for names. Extra 1 space for accomodating '\n' in prints */ |
| 27 | #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | /********************************************************************* |
| 30 | * CPUFREQ NOTIFIER INTERFACE * |
| 31 | *********************************************************************/ |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #define CPUFREQ_TRANSITION_NOTIFIER (0) |
| 34 | #define CPUFREQ_POLICY_NOTIFIER (1) |
| 35 | |
Satyam Sharma | 6070b5d | 2007-10-02 13:28:15 -0700 | [diff] [blame] | 36 | #ifdef CONFIG_CPU_FREQ |
| 37 | int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); |
| 38 | int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); |
Konrad Rzeszutek Wilk | a7b422c | 2012-03-13 19:18:39 -0400 | [diff] [blame] | 39 | extern void disable_cpufreq(void); |
Satyam Sharma | 6070b5d | 2007-10-02 13:28:15 -0700 | [diff] [blame] | 40 | #else /* CONFIG_CPU_FREQ */ |
| 41 | static inline int cpufreq_register_notifier(struct notifier_block *nb, |
| 42 | unsigned int list) |
| 43 | { |
| 44 | return 0; |
| 45 | } |
| 46 | static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
| 47 | unsigned int list) |
| 48 | { |
| 49 | return 0; |
| 50 | } |
Konrad Rzeszutek Wilk | a7b422c | 2012-03-13 19:18:39 -0400 | [diff] [blame] | 51 | static inline void disable_cpufreq(void) { } |
Satyam Sharma | 6070b5d | 2007-10-02 13:28:15 -0700 | [diff] [blame] | 52 | #endif /* CONFIG_CPU_FREQ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | /* if (cpufreq_driver->target) exists, the ->governor decides what frequency |
| 55 | * within the limits is used. If (cpufreq_driver->setpolicy> exists, these |
| 56 | * two generic policies are available: |
| 57 | */ |
| 58 | |
| 59 | #define CPUFREQ_POLICY_POWERSAVE (1) |
| 60 | #define CPUFREQ_POLICY_PERFORMANCE (2) |
| 61 | |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 62 | /* Frequency values here are CPU kHz so that hardware which doesn't run |
| 63 | * with some frequencies can complain without having to guess what per |
| 64 | * cent / per mille means. |
Dave Jones | b53cc6e | 2005-05-31 19:03:47 -0700 | [diff] [blame] | 65 | * Maximum transition latency is in nanoseconds - if it's unknown, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | * CPUFREQ_ETERNAL shall be used. |
| 67 | */ |
| 68 | |
| 69 | struct cpufreq_governor; |
| 70 | |
Thomas Renninger | 8aa84ad | 2009-07-24 15:25:05 +0200 | [diff] [blame] | 71 | /* /sys/devices/system/cpu/cpufreq: entry point for global variables */ |
| 72 | extern struct kobject *cpufreq_global_kobject; |
Viresh Kumar | 2361be2 | 2013-05-17 16:09:09 +0530 | [diff] [blame] | 73 | int cpufreq_get_global_kobject(void); |
| 74 | void cpufreq_put_global_kobject(void); |
| 75 | int cpufreq_sysfs_create_file(const struct attribute *attr); |
| 76 | void cpufreq_sysfs_remove_file(const struct attribute *attr); |
Thomas Renninger | 8aa84ad | 2009-07-24 15:25:05 +0200 | [diff] [blame] | 77 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | #define CPUFREQ_ETERNAL (-1) |
| 79 | struct cpufreq_cpuinfo { |
| 80 | unsigned int max_freq; |
| 81 | unsigned int min_freq; |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 82 | |
| 83 | /* in 10^(-9) s = nanoseconds */ |
| 84 | unsigned int transition_latency; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | }; |
| 86 | |
| 87 | struct cpufreq_real_policy { |
| 88 | unsigned int min; /* in kHz */ |
| 89 | unsigned int max; /* in kHz */ |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 90 | unsigned int policy; /* see above */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | struct cpufreq_governor *governor; /* see below */ |
| 92 | }; |
| 93 | |
| 94 | struct cpufreq_policy { |
Viresh Kumar | 951fc5f | 2013-01-31 02:03:53 +0000 | [diff] [blame] | 95 | /* CPUs sharing clock, require sw coordination */ |
| 96 | cpumask_var_t cpus; /* Online CPUs only */ |
| 97 | cpumask_var_t related_cpus; /* Online + Offline CPUs */ |
| 98 | |
Viresh Kumar | 62b36cc | 2013-02-01 06:40:02 +0000 | [diff] [blame] | 99 | unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs |
Venkatesh Pallipadi | 3b2d994 | 2005-12-14 15:05:00 -0500 | [diff] [blame] | 100 | should set cpufreq */ |
Viresh Kumar | b8eed8a | 2013-01-14 13:23:03 +0000 | [diff] [blame] | 101 | unsigned int cpu; /* cpu nr of CPU managing this policy */ |
| 102 | unsigned int last_cpu; /* cpu nr of previous CPU that managed |
| 103 | * this policy */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | struct cpufreq_cpuinfo cpuinfo;/* see above */ |
| 105 | |
| 106 | unsigned int min; /* in kHz */ |
| 107 | unsigned int max; /* in kHz */ |
| 108 | unsigned int cur; /* in kHz, only needed if cpufreq |
| 109 | * governors are used */ |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 110 | unsigned int policy; /* see above */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | struct cpufreq_governor *governor; /* see below */ |
Viresh Kumar | 7bd353a | 2013-03-27 15:58:57 +0000 | [diff] [blame] | 112 | void *governor_data; |
Xiaoguang Chen | 95731eb | 2013-06-19 15:00:07 +0800 | [diff] [blame] | 113 | bool governor_enabled; /* governor start/stop flag */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | struct work_struct update; /* if update_policy() needs to be |
| 116 | * called, but you're in IRQ context */ |
| 117 | |
| 118 | struct cpufreq_real_policy user_policy; |
| 119 | |
| 120 | struct kobject kobj; |
| 121 | struct completion kobj_unregister; |
| 122 | }; |
| 123 | |
Viresh Kumar | b8eed8a | 2013-01-14 13:23:03 +0000 | [diff] [blame] | 124 | #define CPUFREQ_ADJUST (0) |
| 125 | #define CPUFREQ_INCOMPATIBLE (1) |
| 126 | #define CPUFREQ_NOTIFY (2) |
| 127 | #define CPUFREQ_START (3) |
| 128 | #define CPUFREQ_UPDATE_POLICY_CPU (4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
Viresh Kumar | 62b36cc | 2013-02-01 06:40:02 +0000 | [diff] [blame] | 130 | /* Only for ACPI */ |
Venkatesh Pallipadi | 46f18e3 | 2006-06-26 00:34:43 -0400 | [diff] [blame] | 131 | #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ |
| 132 | #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ |
| 133 | #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ |
| 134 | #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
Fabio Baltieri | 2624f90 | 2013-01-31 09:44:40 +0000 | [diff] [blame] | 136 | static inline bool policy_is_shared(struct cpufreq_policy *policy) |
| 137 | { |
| 138 | return cpumask_weight(policy->cpus) > 1; |
| 139 | } |
| 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | /******************** cpufreq transition notifiers *******************/ |
| 142 | |
| 143 | #define CPUFREQ_PRECHANGE (0) |
| 144 | #define CPUFREQ_POSTCHANGE (1) |
| 145 | #define CPUFREQ_RESUMECHANGE (8) |
Benjamin Herrenschmidt | 42d4dc3 | 2005-04-29 07:40:12 -0700 | [diff] [blame] | 146 | #define CPUFREQ_SUSPENDCHANGE (9) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | struct cpufreq_freqs { |
| 149 | unsigned int cpu; /* cpu nr */ |
| 150 | unsigned int old; |
| 151 | unsigned int new; |
| 152 | u8 flags; /* flags of cpufreq_driver, see below. */ |
| 153 | }; |
| 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | /** |
Viresh Kumar | bb176f7 | 2013-06-19 14:19:33 +0530 | [diff] [blame^] | 156 | * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch |
| 157 | * safe) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | * @old: old value |
| 159 | * @div: divisor |
| 160 | * @mult: multiplier |
| 161 | * |
| 162 | * |
Viresh Kumar | bb176f7 | 2013-06-19 14:19:33 +0530 | [diff] [blame^] | 163 | * new = old * mult / div |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | */ |
Viresh Kumar | bb176f7 | 2013-06-19 14:19:33 +0530 | [diff] [blame^] | 165 | static inline unsigned long cpufreq_scale(unsigned long old, u_int div, |
| 166 | u_int mult) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | { |
| 168 | #if BITS_PER_LONG == 32 |
| 169 | |
| 170 | u64 result = ((u64) old) * ((u64) mult); |
| 171 | do_div(result, div); |
| 172 | return (unsigned long) result; |
| 173 | |
| 174 | #elif BITS_PER_LONG == 64 |
| 175 | |
| 176 | unsigned long result = old * ((u64) mult); |
| 177 | result /= div; |
| 178 | return result; |
| 179 | |
| 180 | #endif |
| 181 | }; |
| 182 | |
| 183 | /********************************************************************* |
| 184 | * CPUFREQ GOVERNORS * |
| 185 | *********************************************************************/ |
| 186 | |
Viresh Kumar | 7bd353a | 2013-03-27 15:58:57 +0000 | [diff] [blame] | 187 | #define CPUFREQ_GOV_START 1 |
| 188 | #define CPUFREQ_GOV_STOP 2 |
| 189 | #define CPUFREQ_GOV_LIMITS 3 |
| 190 | #define CPUFREQ_GOV_POLICY_INIT 4 |
| 191 | #define CPUFREQ_GOV_POLICY_EXIT 5 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | |
| 193 | struct cpufreq_governor { |
| 194 | char name[CPUFREQ_NAME_LEN]; |
Viresh Kumar | b394058 | 2013-02-01 05:42:58 +0000 | [diff] [blame] | 195 | int initialized; |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 196 | int (*governor) (struct cpufreq_policy *policy, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | unsigned int event); |
Venki Pallipadi | 9e76988 | 2007-10-26 10:18:21 -0700 | [diff] [blame] | 198 | ssize_t (*show_setspeed) (struct cpufreq_policy *policy, |
| 199 | char *buf); |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 200 | int (*store_setspeed) (struct cpufreq_policy *policy, |
Venki Pallipadi | 9e76988 | 2007-10-26 10:18:21 -0700 | [diff] [blame] | 201 | unsigned int freq); |
Thomas Renninger | 1c25624 | 2007-10-02 13:28:12 -0700 | [diff] [blame] | 202 | unsigned int max_transition_latency; /* HW must be able to switch to |
| 203 | next freq faster than this value in nano secs or we |
| 204 | will fallback to performance governor */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | struct list_head governor_list; |
| 206 | struct module *owner; |
| 207 | }; |
| 208 | |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 209 | /* |
| 210 | * Pass a target to the cpufreq driver. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | */ |
| 212 | extern int cpufreq_driver_target(struct cpufreq_policy *policy, |
| 213 | unsigned int target_freq, |
| 214 | unsigned int relation); |
| 215 | extern int __cpufreq_driver_target(struct cpufreq_policy *policy, |
| 216 | unsigned int target_freq, |
| 217 | unsigned int relation); |
| 218 | |
venkatesh.pallipadi@intel.com | bf0b90e | 2008-08-04 11:59:07 -0700 | [diff] [blame] | 219 | extern int __cpufreq_driver_getavg(struct cpufreq_policy *policy, |
| 220 | unsigned int cpu); |
Venkatesh Pallipadi | dfde5d6 | 2006-10-03 12:38:45 -0700 | [diff] [blame] | 221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | int cpufreq_register_governor(struct cpufreq_governor *governor); |
| 223 | void cpufreq_unregister_governor(struct cpufreq_governor *governor); |
| 224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | /********************************************************************* |
| 226 | * CPUFREQ DRIVER INTERFACE * |
| 227 | *********************************************************************/ |
| 228 | |
| 229 | #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
| 230 | #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ |
| 231 | |
| 232 | struct freq_attr; |
| 233 | |
| 234 | struct cpufreq_driver { |
Viresh Kumar | bb176f7 | 2013-06-19 14:19:33 +0530 | [diff] [blame^] | 235 | struct module *owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | char name[CPUFREQ_NAME_LEN]; |
| 237 | u8 flags; |
Viresh Kumar | 4d5dcc4 | 2013-03-27 15:58:58 +0000 | [diff] [blame] | 238 | /* |
| 239 | * This should be set by platforms having multiple clock-domains, i.e. |
| 240 | * supporting multiple policies. With this sysfs directories of governor |
| 241 | * would be created in cpu/cpu<num>/cpufreq/ directory and so they can |
| 242 | * use the same governor with different tunables for different clusters. |
| 243 | */ |
| 244 | bool have_governor_per_policy; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | /* needed by all drivers */ |
| 247 | int (*init) (struct cpufreq_policy *policy); |
| 248 | int (*verify) (struct cpufreq_policy *policy); |
| 249 | |
| 250 | /* define one out of two */ |
| 251 | int (*setpolicy) (struct cpufreq_policy *policy); |
| 252 | int (*target) (struct cpufreq_policy *policy, |
| 253 | unsigned int target_freq, |
| 254 | unsigned int relation); |
| 255 | |
| 256 | /* should be defined, if possible */ |
| 257 | unsigned int (*get) (unsigned int cpu); |
| 258 | |
| 259 | /* optional */ |
venkatesh.pallipadi@intel.com | bf0b90e | 2008-08-04 11:59:07 -0700 | [diff] [blame] | 260 | unsigned int (*getavg) (struct cpufreq_policy *policy, |
| 261 | unsigned int cpu); |
Thomas Renninger | e2f74f3 | 2009-11-19 12:31:01 +0100 | [diff] [blame] | 262 | int (*bios_limit) (int cpu, unsigned int *limit); |
venkatesh.pallipadi@intel.com | bf0b90e | 2008-08-04 11:59:07 -0700 | [diff] [blame] | 263 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | int (*exit) (struct cpufreq_policy *policy); |
Rafael J. Wysocki | 7ca64e2 | 2011-03-10 21:13:05 +0100 | [diff] [blame] | 265 | int (*suspend) (struct cpufreq_policy *policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | int (*resume) (struct cpufreq_policy *policy); |
| 267 | struct freq_attr **attr; |
| 268 | }; |
| 269 | |
| 270 | /* flags */ |
| 271 | |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 272 | #define CPUFREQ_STICKY 0x01 /* the driver isn't removed even if |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | * all ->init() calls failed */ |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 274 | #define CPUFREQ_CONST_LOOPS 0x02 /* loops_per_jiffy or other kernel |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | * "constants" aren't affected by |
| 276 | * frequency transitions */ |
Benjamin Herrenschmidt | 42d4dc3 | 2005-04-29 07:40:12 -0700 | [diff] [blame] | 277 | #define CPUFREQ_PM_NO_WARN 0x04 /* don't warn on suspend/resume speed |
| 278 | * mismatches */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Linus Torvalds | 221dee2 | 2007-02-26 14:55:48 -0800 | [diff] [blame] | 280 | int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
| 281 | int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
Viresh Kumar | b43a7ff | 2013-03-24 11:56:43 +0530 | [diff] [blame] | 283 | void cpufreq_notify_transition(struct cpufreq_policy *policy, |
| 284 | struct cpufreq_freqs *freqs, unsigned int state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
Viresh Kumar | bb176f7 | 2013-06-19 14:19:33 +0530 | [diff] [blame^] | 286 | static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, |
| 287 | unsigned int min, unsigned int max) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | { |
| 289 | if (policy->min < min) |
| 290 | policy->min = min; |
| 291 | if (policy->max < min) |
| 292 | policy->max = min; |
| 293 | if (policy->min > max) |
| 294 | policy->min = max; |
| 295 | if (policy->max > max) |
| 296 | policy->max = max; |
| 297 | if (policy->min > policy->max) |
| 298 | policy->min = policy->max; |
| 299 | return; |
| 300 | } |
| 301 | |
| 302 | struct freq_attr { |
| 303 | struct attribute attr; |
| 304 | ssize_t (*show)(struct cpufreq_policy *, char *); |
| 305 | ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); |
| 306 | }; |
| 307 | |
Borislav Petkov | 6dad2a2 | 2010-03-31 21:56:46 +0200 | [diff] [blame] | 308 | #define cpufreq_freq_attr_ro(_name) \ |
| 309 | static struct freq_attr _name = \ |
| 310 | __ATTR(_name, 0444, show_##_name, NULL) |
| 311 | |
| 312 | #define cpufreq_freq_attr_ro_perm(_name, _perm) \ |
| 313 | static struct freq_attr _name = \ |
| 314 | __ATTR(_name, _perm, show_##_name, NULL) |
| 315 | |
Borislav Petkov | 6dad2a2 | 2010-03-31 21:56:46 +0200 | [diff] [blame] | 316 | #define cpufreq_freq_attr_rw(_name) \ |
| 317 | static struct freq_attr _name = \ |
| 318 | __ATTR(_name, 0644, show_##_name, store_##_name) |
| 319 | |
Thomas Renninger | 8aa84ad | 2009-07-24 15:25:05 +0200 | [diff] [blame] | 320 | struct global_attr { |
| 321 | struct attribute attr; |
| 322 | ssize_t (*show)(struct kobject *kobj, |
| 323 | struct attribute *attr, char *buf); |
| 324 | ssize_t (*store)(struct kobject *a, struct attribute *b, |
| 325 | const char *c, size_t count); |
| 326 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
Borislav Petkov | 6dad2a2 | 2010-03-31 21:56:46 +0200 | [diff] [blame] | 328 | #define define_one_global_ro(_name) \ |
| 329 | static struct global_attr _name = \ |
| 330 | __ATTR(_name, 0444, show_##_name, NULL) |
| 331 | |
| 332 | #define define_one_global_rw(_name) \ |
| 333 | static struct global_attr _name = \ |
| 334 | __ATTR(_name, 0644, show_##_name, store_##_name) |
| 335 | |
Borislav Petkov | ab45bd9 | 2013-01-28 14:50:39 +0100 | [diff] [blame] | 336 | struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
| 337 | void cpufreq_cpu_put(struct cpufreq_policy *data); |
| 338 | const char *cpufreq_get_current_driver(void); |
Borislav Petkov | 6dad2a2 | 2010-03-31 21:56:46 +0200 | [diff] [blame] | 339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | /********************************************************************* |
| 341 | * CPUFREQ 2.6. INTERFACE * |
| 342 | *********************************************************************/ |
Viresh Kumar | 72a4ce3 | 2013-05-17 11:26:32 +0000 | [diff] [blame] | 343 | u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); |
| 345 | int cpufreq_update_policy(unsigned int cpu); |
Viresh Kumar | 4d5dcc4 | 2013-03-27 15:58:58 +0000 | [diff] [blame] | 346 | bool have_governor_per_policy(void); |
Viresh Kumar | 944e9a0 | 2013-05-16 05:09:57 +0000 | [diff] [blame] | 347 | struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
Randy Dunlap | 2eca40a | 2009-10-26 16:49:29 -0700 | [diff] [blame] | 349 | #ifdef CONFIG_CPU_FREQ |
Viresh Kumar | bb176f7 | 2013-06-19 14:19:33 +0530 | [diff] [blame^] | 350 | /* |
| 351 | * query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it |
| 352 | */ |
Linus Torvalds | ff0ce68 | 2007-09-26 15:52:17 -0700 | [diff] [blame] | 353 | unsigned int cpufreq_get(unsigned int cpu); |
Randy Dunlap | 2eca40a | 2009-10-26 16:49:29 -0700 | [diff] [blame] | 354 | #else |
| 355 | static inline unsigned int cpufreq_get(unsigned int cpu) |
| 356 | { |
| 357 | return 0; |
| 358 | } |
| 359 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Viresh Kumar | bb176f7 | 2013-06-19 14:19:33 +0530 | [diff] [blame^] | 361 | /* |
| 362 | * query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it |
| 363 | */ |
Venkatesh Pallipadi | 95235ca | 2005-12-02 10:43:20 -0800 | [diff] [blame] | 364 | #ifdef CONFIG_CPU_FREQ |
| 365 | unsigned int cpufreq_quick_get(unsigned int cpu); |
Jesse Barnes | 3d73710 | 2011-06-28 10:59:12 -0700 | [diff] [blame] | 366 | unsigned int cpufreq_quick_get_max(unsigned int cpu); |
Venkatesh Pallipadi | 95235ca | 2005-12-02 10:43:20 -0800 | [diff] [blame] | 367 | #else |
| 368 | static inline unsigned int cpufreq_quick_get(unsigned int cpu) |
| 369 | { |
| 370 | return 0; |
| 371 | } |
Jesse Barnes | 3d73710 | 2011-06-28 10:59:12 -0700 | [diff] [blame] | 372 | static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) |
| 373 | { |
| 374 | return 0; |
| 375 | } |
Venkatesh Pallipadi | 95235ca | 2005-12-02 10:43:20 -0800 | [diff] [blame] | 376 | #endif |
| 377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | /********************************************************************* |
| 379 | * CPUFREQ DEFAULT GOVERNOR * |
| 380 | *********************************************************************/ |
| 381 | |
Thomas Renninger | 1c25624 | 2007-10-02 13:28:12 -0700 | [diff] [blame] | 382 | /* |
Viresh Kumar | bb176f7 | 2013-06-19 14:19:33 +0530 | [diff] [blame^] | 383 | * Performance governor is fallback governor if any other gov failed to auto |
| 384 | * load due latency restrictions |
| 385 | */ |
Thomas Renninger | 6afde10 | 2007-10-02 13:28:13 -0700 | [diff] [blame] | 386 | #ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | extern struct cpufreq_governor cpufreq_gov_performance; |
Thomas Renninger | 6afde10 | 2007-10-02 13:28:13 -0700 | [diff] [blame] | 388 | #endif |
Thomas Renninger | 1c25624 | 2007-10-02 13:28:12 -0700 | [diff] [blame] | 389 | #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE |
| 390 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance) |
Alessandro Guido | 30d221d | 2008-04-18 13:31:13 -0700 | [diff] [blame] | 391 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) |
| 392 | extern struct cpufreq_governor cpufreq_gov_powersave; |
| 393 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) |
| 395 | extern struct cpufreq_governor cpufreq_gov_userspace; |
Thomas Renninger | 1c25624 | 2007-10-02 13:28:12 -0700 | [diff] [blame] | 396 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace) |
| 397 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND) |
| 398 | extern struct cpufreq_governor cpufreq_gov_ondemand; |
| 399 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand) |
| 400 | #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE) |
| 401 | extern struct cpufreq_governor cpufreq_gov_conservative; |
| 402 | #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | #endif |
| 404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | /********************************************************************* |
| 406 | * FREQUENCY TABLE HELPERS * |
| 407 | *********************************************************************/ |
| 408 | |
| 409 | #define CPUFREQ_ENTRY_INVALID ~0 |
| 410 | #define CPUFREQ_TABLE_END ~1 |
| 411 | |
| 412 | struct cpufreq_frequency_table { |
Viresh Kumar | 5070158 | 2013-03-30 16:25:15 +0530 | [diff] [blame] | 413 | unsigned int driver_data; /* driver specific data, not used by core */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | unsigned int frequency; /* kHz - doesn't need to be in ascending |
| 415 | * order */ |
| 416 | }; |
| 417 | |
| 418 | int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, |
| 419 | struct cpufreq_frequency_table *table); |
| 420 | |
| 421 | int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, |
| 422 | struct cpufreq_frequency_table *table); |
| 423 | |
| 424 | int cpufreq_frequency_table_target(struct cpufreq_policy *policy, |
| 425 | struct cpufreq_frequency_table *table, |
| 426 | unsigned int target_freq, |
| 427 | unsigned int relation, |
| 428 | unsigned int *index); |
| 429 | |
| 430 | /* the following 3 funtions are for cpufreq core use only */ |
| 431 | struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | /* the following are really really optional */ |
| 434 | extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; |
| 435 | |
Thiago Farina | 335dc33 | 2011-04-28 20:42:53 -0300 | [diff] [blame] | 436 | void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | unsigned int cpu); |
Viresh Kumar | b8eed8a | 2013-01-14 13:23:03 +0000 | [diff] [blame] | 438 | void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
| 440 | void cpufreq_frequency_table_put_attr(unsigned int cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | #endif /* _LINUX_CPUFREQ_H */ |