diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/cpufreq.h | 73 |
1 files changed, 38 insertions, 35 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 1bdb797bf9bd..dc29d5c4e713 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -20,6 +20,7 @@ #include <linux/device.h> #include <linux/kobject.h> #include <linux/sysfs.h> +#include <linux/completion.h> #define CPUFREQ_NAME_LEN 16 @@ -31,17 +32,15 @@ int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); -#define CPUFREQ_TRANSITION_NOTIFIER (0) -#define CPUFREQ_POLICY_NOTIFIER (1) - -#define CPUFREQ_ALL_CPUS ((NR_CPUS)) +#define CPUFREQ_TRANSITION_NOTIFIER (0) +#define CPUFREQ_POLICY_NOTIFIER (1) /********************** cpufreq policy notifiers *********************/ -#define CPUFREQ_POLICY_POWERSAVE (1) -#define CPUFREQ_POLICY_PERFORMANCE (2) -#define CPUFREQ_POLICY_GOVERNOR (3) +#define CPUFREQ_POLICY_POWERSAVE (1) +#define CPUFREQ_POLICY_PERFORMANCE (2) +#define CPUFREQ_POLICY_GOVERNOR (3) /* Frequency values here are CPU kHz so that hardware which doesn't run * with some frequencies can complain without having to guess what per @@ -52,30 +51,34 @@ int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); struct cpufreq_governor; -#define CPUFREQ_ETERNAL (-1) +#define CPUFREQ_ETERNAL (-1) struct cpufreq_cpuinfo { - unsigned int max_freq; - unsigned int min_freq; - unsigned int transition_latency; + unsigned int max_freq; + unsigned int min_freq; + unsigned int transition_latency; /* in 10^(-9) s */ }; struct cpufreq_policy { - unsigned int cpu; /* cpu nr or CPUFREQ_ALL_CPUS */ - unsigned int min; /* in kHz */ - unsigned int max; /* in kHz */ - unsigned int cur; /* in kHz, only needed if cpufreq + unsigned int cpu; /* cpu nr */ + struct cpufreq_cpuinfo cpuinfo;/* see above */ + + unsigned int min; /* in kHz */ + unsigned int max; /* in kHz */ + unsigned int cur; /* in kHz, only needed if cpufreq * governors are used */ - unsigned int policy; /* see above */ - struct cpufreq_governor *governor; /* see below */ - struct cpufreq_cpuinfo cpuinfo; /* see above */ - struct kobject kobj; + unsigned int policy; /* see above */ + struct cpufreq_governor *governor; /* see below */ + struct semaphore lock; /* CPU ->setpolicy or ->target may only be called once a time */ + + struct kobject kobj; + struct completion kobj_unregister; }; -#define CPUFREQ_ADJUST (0) -#define CPUFREQ_INCOMPATIBLE (1) -#define CPUFREQ_NOTIFY (2) +#define CPUFREQ_ADJUST (0) +#define CPUFREQ_INCOMPATIBLE (1) +#define CPUFREQ_NOTIFY (2) /******************** cpufreq transition notifiers *******************/ @@ -84,7 +87,7 @@ struct cpufreq_policy { #define CPUFREQ_POSTCHANGE (1) struct cpufreq_freqs { - unsigned int cpu; /* cpu nr or CPUFREQ_ALL_CPUS */ + unsigned int cpu; /* cpu nr */ unsigned int old; unsigned int new; }; @@ -125,11 +128,11 @@ static inline unsigned long cpufreq_scale(unsigned long old, u_int div, u_int mu #define CPUFREQ_GOV_LIMITS 3 struct cpufreq_governor { - char name[CPUFREQ_NAME_LEN]; - int (*governor) (struct cpufreq_policy *policy, + char name[CPUFREQ_NAME_LEN]; + int (*governor) (struct cpufreq_policy *policy, unsigned int event); struct list_head governor_list; - struct module *owner; + struct module *owner; }; /* pass a target to the cpufreq driver @@ -154,18 +157,22 @@ void cpufreq_unregister_governor(struct cpufreq_governor *governor); struct freq_attr; struct cpufreq_driver { + struct module *owner; + char name[CPUFREQ_NAME_LEN]; + + struct cpufreq_policy *policy; + /* needed by all drivers */ + int (*init) (struct cpufreq_policy *policy); int (*verify) (struct cpufreq_policy *policy); - struct cpufreq_policy *policy; - char name[CPUFREQ_NAME_LEN]; + /* define one out of two */ int (*setpolicy) (struct cpufreq_policy *policy); int (*target) (struct cpufreq_policy *policy, unsigned int target_freq, unsigned int relation); - struct module *owner; - /* optional, for the moment */ - int (*init) (struct cpufreq_policy *policy); + + /* optional */ int (*exit) (struct cpufreq_policy *policy); struct freq_attr **attr; }; @@ -306,8 +313,4 @@ void cpufreq_frequency_table_put_attr(unsigned int cpu); #endif /* CONFIG_CPU_FREQ_TABLE */ - -/* Currently exported only for the proc interface, remove when that goes */ -extern struct cpufreq_driver *cpufreq_driver; - #endif /* _LINUX_CPUFREQ_H */ |