diff options
Diffstat (limited to 'include/linux/cpufreq.h')
| -rw-r--r-- | include/linux/cpufreq.h | 50 |
1 files changed, 32 insertions, 18 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 963051a967d6..23932d7741a9 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -32,20 +32,24 @@ * CPUFREQ NOTIFIER INTERFACE * *********************************************************************/ +#define CPUFREQ_TRANSITION_NOTIFIER (0) +#define CPUFREQ_POLICY_NOTIFIER (1) + #ifdef CONFIG_CPU_FREQ int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); -#else +int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); +#else /* CONFIG_CPU_FREQ */ static inline int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list) { return 0; } -#endif -int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); - -#define CPUFREQ_TRANSITION_NOTIFIER (0) -#define CPUFREQ_POLICY_NOTIFIER (1) - +static inline int cpufreq_unregister_notifier(struct notifier_block *nb, + unsigned int list) +{ + return 0; +} +#endif /* CONFIG_CPU_FREQ */ /* if (cpufreq_driver->target) exists, the ->governor decides what frequency * within the limits is used. If (cpufreq_driver->setpolicy> exists, these @@ -163,6 +167,9 @@ struct cpufreq_governor { char name[CPUFREQ_NAME_LEN]; int (*governor) (struct cpufreq_policy *policy, unsigned int event); + unsigned int max_transition_latency; /* HW must be able to switch to + next freq faster than this value in nano secs or we + will fallback to performance governor */ struct list_head governor_list; struct module *owner; }; @@ -268,22 +275,17 @@ struct freq_attr { int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); int cpufreq_update_policy(unsigned int cpu); +/* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */ +unsigned int cpufreq_get(unsigned int cpu); -/* - * query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it - */ +/* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */ #ifdef CONFIG_CPU_FREQ unsigned int cpufreq_quick_get(unsigned int cpu); -unsigned int cpufreq_get(unsigned int cpu); #else static inline unsigned int cpufreq_quick_get(unsigned int cpu) { return 0; } -static inline unsigned int cpufreq_get(unsigned int cpu) -{ - return 0; -} #endif @@ -292,12 +294,24 @@ static inline unsigned int cpufreq_get(unsigned int cpu) *********************************************************************/ -#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE +/* + Performance governor is fallback governor if any other gov failed to + auto load due latency restrictions +*/ +#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE extern struct cpufreq_governor cpufreq_gov_performance; -#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_performance +#endif +#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE +#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance) #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) extern struct cpufreq_governor cpufreq_gov_userspace; -#define CPUFREQ_DEFAULT_GOVERNOR &cpufreq_gov_userspace +#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace) +#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND) +extern struct cpufreq_governor cpufreq_gov_ondemand; +#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand) +#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE) +extern struct cpufreq_governor cpufreq_gov_conservative; +#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative) #endif |