| /* |
| * linux/include/linux/cpufreq.h |
| * |
| * Copyright (C) 2001 Russell King |
| * (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #ifndef _LINUX_CPUFREQ_H |
| #define _LINUX_CPUFREQ_H |
| |
| #include <linux/clk.h> |
| #include <linux/cpumask.h> |
| #include <linux/completion.h> |
| #include <linux/kobject.h> |
| #include <linux/notifier.h> |
| #include <linux/spinlock.h> |
| #include <linux/sysfs.h> |
| |
| /********************************************************************* |
| * CPUFREQ INTERFACE * |
| *********************************************************************/ |
| /* |
| * Frequency values here are CPU kHz |
| * |
| * Maximum transition latency is in nanoseconds - if it's unknown, |
| * CPUFREQ_ETERNAL shall be used. |
| */ |
| |
| #define CPUFREQ_ETERNAL (-1) |
| #define CPUFREQ_NAME_LEN 16 |
| /* Print length for names. Extra 1 space for accomodating '\n' in prints */ |
| #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) |
| |
| struct cpufreq_governor; |
| |
| struct cpufreq_freqs { |
| unsigned int cpu; /* cpu nr */ |
| unsigned int old; |
| unsigned int new; |
| u8 flags; /* flags of cpufreq_driver, see below. */ |
| }; |
| |
| struct cpufreq_cpuinfo { |
| unsigned int max_freq; |
| unsigned int min_freq; |
| |
| /* in 10^(-9) s = nanoseconds */ |
| unsigned int transition_latency; |
| }; |
| |
| struct cpufreq_real_policy { |
| unsigned int min; /* in kHz */ |
| unsigned int max; /* in kHz */ |
| unsigned int policy; /* see above */ |
| struct cpufreq_governor *governor; /* see below */ |
| }; |
| |
| struct cpufreq_policy { |
| /* CPUs sharing clock, require sw coordination */ |
| cpumask_var_t cpus; /* Online CPUs only */ |
| cpumask_var_t related_cpus; /* Online + Offline CPUs */ |
| cpumask_var_t real_cpus; /* Related and present */ |
| |
| unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs |
| should set cpufreq */ |
| unsigned int cpu; /* cpu managing this policy, must be online */ |
| unsigned int kobj_cpu; /* cpu managing sysfs files, can be offline */ |
| |
| struct clk *clk; |
| 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 restore_freq; /* = policy->cur before transition */ |
| unsigned int suspend_freq; /* freq to set during suspend */ |
| |
| unsigned int policy; /* see above */ |
| struct cpufreq_governor *governor; /* see below */ |
| void *governor_data; |
| bool governor_enabled; /* governor start/stop flag */ |
| char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */ |
| |
| struct work_struct update; /* if update_policy() needs to be |
| * called, but you're in IRQ context */ |
| |
| struct cpufreq_real_policy user_policy; |
| struct cpufreq_frequency_table *freq_table; |
| |
| struct list_head policy_list; |
| struct kobject kobj; |
| struct completion kobj_unregister; |
| |
| /* |
| * The rules for this semaphore: |
| * - Any routine that wants to read from the policy structure will |
| * do a down_read on this semaphore. |
| * - Any routine that will write to the policy structure and/or may take away |
| * the policy altogether (eg. CPU hotplug), will hold this lock in write |
| * mode before doing so. |
| * |
| * Additional rules: |
| * - Lock should not be held across |
| * __cpufreq_governor(data, CPUFREQ_GOV_POLICY_EXIT); |
| */ |
| struct rw_semaphore rwsem; |
| |
| /* Synchronization for frequency transitions */ |
| bool transition_ongoing; /* Tracks transition status */ |
| spinlock_t transition_lock; |
| wait_queue_head_t transition_wait; |
| struct task_struct *transition_task; /* Task which is doing the transition */ |
| |
| /* cpufreq-stats */ |
| struct cpufreq_stats *stats; |
| |
| /* For cpufreq driver's internal use */ |
| void *driver_data; |
| }; |
| |
| /* Only for ACPI */ |
| #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ |
| #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ |
| #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ |
| #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ |
| |
| #ifdef CONFIG_CPU_FREQ |
| struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
| void cpufreq_cpu_put(struct cpufreq_policy *policy); |
| #else |
| static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) |
| { |
| return NULL; |
| } |
| static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } |
| #endif |
| |
| static inline bool policy_is_shared(struct cpufreq_policy *policy) |
| { |
| return cpumask_weight(policy->cpus) > 1; |
| } |
| |
| /* /sys/devices/system/cpu/cpufreq: entry point for global variables */ |
| extern struct kobject *cpufreq_global_kobject; |
| int cpufreq_get_global_kobject(void); |
| void cpufreq_put_global_kobject(void); |
| int cpufreq_sysfs_create_file(const struct attribute *attr); |
| void cpufreq_sysfs_remove_file(const struct attribute *attr); |
| |
| #ifdef CONFIG_CPU_FREQ |
| unsigned int cpufreq_get(unsigned int cpu); |
| unsigned int cpufreq_quick_get(unsigned int cpu); |
| unsigned int cpufreq_quick_get_max(unsigned int cpu); |
| void disable_cpufreq(void); |
| |
| u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); |
| int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); |
| int cpufreq_update_policy(unsigned int cpu); |
| bool have_governor_per_policy(void); |
| struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); |
| #else |
| static inline unsigned int cpufreq_get(unsigned int cpu) |
| { |
| return 0; |
| } |
| static inline unsigned int cpufreq_quick_get(unsigned int cpu) |
| { |
| return 0; |
| } |
| static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) |
| { |
| return 0; |
| } |
| static inline void disable_cpufreq(void) { } |
| #endif |
| |
| /********************************************************************* |
| * CPUFREQ DRIVER INTERFACE * |
| *********************************************************************/ |
| |
| #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
| #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ |
| #define CPUFREQ_RELATION_C 2 /* closest frequency to target */ |
| |
| struct freq_attr { |
| struct attribute attr; |
| ssize_t (*show)(struct cpufreq_policy *, char *); |
| ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); |
| }; |
| |
| #define cpufreq_freq_attr_ro(_name) \ |
| static struct freq_attr _name = \ |
| __ATTR(_name, 0444, show_##_name, NULL) |
| |
| #define cpufreq_freq_attr_ro_perm(_name, _perm) \ |
| static struct freq_attr _name = \ |
| __ATTR(_name, _perm, show_##_name, NULL) |
| |
| #define cpufreq_freq_attr_rw(_name) \ |
| static struct freq_attr _name = \ |
| __ATTR(_name, 0644, show_##_name, store_##_name) |
| |
| struct global_attr { |
| struct attribute attr; |
| ssize_t (*show)(struct kobject *kobj, |
| struct attribute *attr, char *buf); |
| ssize_t (*store)(struct kobject *a, struct attribute *b, |
| const char *c, size_t count); |
| }; |
| |
| #define define_one_global_ro(_name) \ |
| static struct global_attr _name = \ |
| __ATTR(_name, 0444, show_##_name, NULL) |
| |
| #define define_one_global_rw(_name) \ |
| static struct global_attr _name = \ |
| __ATTR(_name, 0644, show_##_name, store_##_name) |
| |
| |
| struct cpufreq_driver { |
| char name[CPUFREQ_NAME_LEN]; |
| u8 flags; |
| void *driver_data; |
| |
| /* needed by all drivers */ |
| int (*init)(struct cpufreq_policy *policy); |
| int (*verify)(struct cpufreq_policy *policy); |
| |
| /* define one out of two */ |
| int (*setpolicy)(struct cpufreq_policy *policy); |
| |
| /* |
| * On failure, should always restore frequency to policy->restore_freq |
| * (i.e. old freq). |
| */ |
| int (*target)(struct cpufreq_policy *policy, |
| unsigned int target_freq, |
| unsigned int relation); /* Deprecated */ |
| int (*target_index)(struct cpufreq_policy *policy, |
| unsigned int index); |
| /* |
| * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION |
| * unset. |
| * |
| * get_intermediate should return a stable intermediate frequency |
| * platform wants to switch to and target_intermediate() should set CPU |
| * to to that frequency, before jumping to the frequency corresponding |
| * to 'index'. Core will take care of sending notifications and driver |
| * doesn't have to handle them in target_intermediate() or |
| * target_index(). |
| * |
| * Drivers can return '0' from get_intermediate() in case they don't |
| * wish to switch to intermediate frequency for some target frequency. |
| * In that case core will directly call ->target_index(). |
| */ |
| unsigned int (*get_intermediate)(struct cpufreq_policy *policy, |
| unsigned int index); |
| int (*target_intermediate)(struct cpufreq_policy *policy, |
| unsigned int index); |
| |
| /* should be defined, if possible */ |
| unsigned int (*get)(unsigned int cpu); |
| |
| /* optional */ |
| int (*bios_limit)(int cpu, unsigned int *limit); |
| |
| int (*exit)(struct cpufreq_policy *policy); |
| void (*stop_cpu)(struct cpufreq_policy *policy); |
| int (*suspend)(struct cpufreq_policy *policy); |
| int (*resume)(struct cpufreq_policy *policy); |
| |
| /* Will be called after the driver is fully initialized */ |
| void (*ready)(struct cpufreq_policy *policy); |
| |
| struct freq_attr **attr; |
| |
| /* platform specific boost support code */ |
| bool boost_supported; |
| bool boost_enabled; |
| int (*set_boost)(int state); |
| }; |
| |
| /* flags */ |
| #define CPUFREQ_STICKY (1 << 0) /* driver isn't removed even if |
| all ->init() calls failed */ |
| #define CPUFREQ_CONST_LOOPS (1 << 1) /* loops_per_jiffy or other |
| kernel "constants" aren't |
| affected by frequency |
| transitions */ |
| #define CPUFREQ_PM_NO_WARN (1 << 2) /* don't warn on suspend/resume |
| speed mismatches */ |
| |
| /* |
| * This should be set by platforms having multiple clock-domains, i.e. |
| * supporting multiple policies. With this sysfs directories of governor would |
| * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same |
| * governor with different tunables for different clusters. |
| */ |
| #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY (1 << 3) |
| |
| /* |
| * Driver will do POSTCHANGE notifications from outside of their ->target() |
| * routine and so must set cpufreq_driver->flags with this flag, so that core |
| * can handle them specially. |
| */ |
| #define CPUFREQ_ASYNC_NOTIFICATION (1 << 4) |
| |
| /* |
| * Set by drivers which want cpufreq core to check if CPU is running at a |
| * frequency present in freq-table exposed by the driver. For these drivers if |
| * CPU is found running at an out of table freq, we will try to set it to a freq |
| * from the table. And if that fails, we will stop further boot process by |
| * issuing a BUG_ON(). |
| */ |
| #define CPUFREQ_NEED_INITIAL_FREQ_CHECK (1 << 5) |
| |
| int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
| int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); |
| |
| const char *cpufreq_get_current_driver(void); |
| void *cpufreq_get_driver_data(void); |
| |
| static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, |
| unsigned int min, unsigned int max) |
| { |
| if (policy->min < min) |
| policy->min = min; |
| if (policy->max < min) |
| policy->max = min; |
| if (policy->min > max) |
| policy->min = max; |
| if (policy->max > max) |
| policy->max = max; |
| if (policy->min > policy->max) |
| policy->min = policy->max; |
| return; |
| } |
| |
| static inline void |
| cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) |
| { |
| cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, |
| policy->cpuinfo.max_freq); |
| } |
| |
| #ifdef CONFIG_CPU_FREQ |
| void cpufreq_suspend(void); |
| void cpufreq_resume(void); |
| int cpufreq_generic_suspend(struct cpufreq_policy *policy); |
| #else |
| static inline void cpufreq_suspend(void) {} |
| static inline void cpufreq_resume(void) {} |
| #endif |
| |
| /********************************************************************* |
| * CPUFREQ NOTIFIER INTERFACE * |
| *********************************************************************/ |
| |
| #define CPUFREQ_TRANSITION_NOTIFIER (0) |
| #define CPUFREQ_POLICY_NOTIFIER (1) |
| |
| /* Transition notifiers */ |
| #define CPUFREQ_PRECHANGE (0) |
| #define CPUFREQ_POSTCHANGE (1) |
| |
| /* Policy Notifiers */ |
| #define CPUFREQ_ADJUST (0) |
| #define CPUFREQ_INCOMPATIBLE (1) |
| #define CPUFREQ_NOTIFY (2) |
| #define CPUFREQ_START (3) |
| #define CPUFREQ_CREATE_POLICY (4) |
| #define CPUFREQ_REMOVE_POLICY (5) |
| |
| #ifdef CONFIG_CPU_FREQ |
| int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); |
| int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); |
| |
| void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, |
| struct cpufreq_freqs *freqs); |
| void cpufreq_freq_transition_end(struct cpufreq_policy *policy, |
| struct cpufreq_freqs *freqs, int transition_failed); |
| |
| #else /* CONFIG_CPU_FREQ */ |
| static inline int cpufreq_register_notifier(struct notifier_block *nb, |
| unsigned int list) |
| { |
| return 0; |
| } |
| static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
| unsigned int list) |
| { |
| return 0; |
| } |
| #endif /* !CONFIG_CPU_FREQ */ |
| |
| /** |
| * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch |
| * safe) |
| * @old: old value |
| * @div: divisor |
| * @mult: multiplier |
| * |
| * |
| * new = old * mult / div |
| */ |
| static inline unsigned long cpufreq_scale(unsigned long old, u_int div, |
| u_int mult) |
| { |
| #if BITS_PER_LONG == 32 |
| u64 result = ((u64) old) * ((u64) mult); |
| do_div(result, div); |
| return (unsigned long) result; |
| |
| #elif BITS_PER_LONG == 64 |
| unsigned long result = old * ((u64) mult); |
| result /= div; |
| return result; |
| #endif |
| } |
| |
| /********************************************************************* |
| * CPUFREQ GOVERNORS * |
| *********************************************************************/ |
| |
| /* |
| * If (cpufreq_driver->target) exists, the ->governor decides what frequency |
| * within the limits is used. If (cpufreq_driver->setpolicy> exists, these |
| * two generic policies are available: |
| */ |
| #define CPUFREQ_POLICY_POWERSAVE (1) |
| #define CPUFREQ_POLICY_PERFORMANCE (2) |
| |
| /* Governor Events */ |
| #define CPUFREQ_GOV_START 1 |
| #define CPUFREQ_GOV_STOP 2 |
| #define CPUFREQ_GOV_LIMITS 3 |
| #define CPUFREQ_GOV_POLICY_INIT 4 |
| #define CPUFREQ_GOV_POLICY_EXIT 5 |
| |
| struct cpufreq_governor { |
| char name[CPUFREQ_NAME_LEN]; |
| int initialized; |
| int (*governor) (struct cpufreq_policy *policy, |
| unsigned int event); |
| ssize_t (*show_setspeed) (struct cpufreq_policy *policy, |
| char *buf); |
| int (*store_setspeed) (struct cpufreq_policy *policy, |
| unsigned int freq); |
| 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; |
| }; |
| |
| /* Pass a target to the cpufreq driver */ |
| int cpufreq_driver_target(struct cpufreq_policy *policy, |
| unsigned int target_freq, |
| unsigned int relation); |
| int __cpufreq_driver_target(struct cpufreq_policy *policy, |
| unsigned int target_freq, |
| unsigned int relation); |
| int cpufreq_register_governor(struct cpufreq_governor *governor); |
| void cpufreq_unregister_governor(struct cpufreq_governor *governor); |
| |
| /* CPUFREQ DEFAULT GOVERNOR */ |
| /* |
| * 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; |
| #endif |
| #ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE |
| #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance) |
| #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) |
| extern struct cpufreq_governor cpufreq_gov_powersave; |
| #define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave) |
| #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) |
| extern struct cpufreq_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 |
| |
| /********************************************************************* |
| * FREQUENCY TABLE HELPERS * |
| *********************************************************************/ |
| |
| /* Special Values of .frequency field */ |
| #define CPUFREQ_ENTRY_INVALID ~0u |
| #define CPUFREQ_TABLE_END ~1u |
| /* Special Values of .flags field */ |
| #define CPUFREQ_BOOST_FREQ (1 << 0) |
| |
| struct cpufreq_frequency_table { |
| unsigned int flags; |
| unsigned int driver_data; /* driver specific data, not used by core */ |
| unsigned int frequency; /* kHz - doesn't need to be in ascending |
| * order */ |
| }; |
| |
| #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP) |
| int dev_pm_opp_init_cpufreq_table(struct device *dev, |
| struct cpufreq_frequency_table **table); |
| void dev_pm_opp_free_cpufreq_table(struct device *dev, |
| struct cpufreq_frequency_table **table); |
| #else |
| static inline int dev_pm_opp_init_cpufreq_table(struct device *dev, |
| struct cpufreq_frequency_table |
| **table) |
| { |
| return -EINVAL; |
| } |
| |
| static inline void dev_pm_opp_free_cpufreq_table(struct device *dev, |
| struct cpufreq_frequency_table |
| **table) |
| { |
| } |
| #endif |
| |
| static inline bool cpufreq_next_valid(struct cpufreq_frequency_table **pos) |
| { |
| while ((*pos)->frequency != CPUFREQ_TABLE_END) |
| if ((*pos)->frequency != CPUFREQ_ENTRY_INVALID) |
| return true; |
| else |
| (*pos)++; |
| return false; |
| } |
| |
| /* |
| * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table |
| * @pos: the cpufreq_frequency_table * to use as a loop cursor. |
| * @table: the cpufreq_frequency_table * to iterate over. |
| */ |
| |
| #define cpufreq_for_each_entry(pos, table) \ |
| for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) |
| |
| /* |
| * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table |
| * excluding CPUFREQ_ENTRY_INVALID frequencies. |
| * @pos: the cpufreq_frequency_table * to use as a loop cursor. |
| * @table: the cpufreq_frequency_table * to iterate over. |
| */ |
| |
| #define cpufreq_for_each_valid_entry(pos, table) \ |
| for (pos = table; cpufreq_next_valid(&pos); pos++) |
| |
| int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, |
| struct cpufreq_frequency_table *table); |
| |
| int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, |
| struct cpufreq_frequency_table *table); |
| int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy); |
| |
| int cpufreq_frequency_table_target(struct cpufreq_policy *policy, |
| struct cpufreq_frequency_table *table, |
| unsigned int target_freq, |
| unsigned int relation, |
| unsigned int *index); |
| int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, |
| unsigned int freq); |
| |
| ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); |
| |
| #ifdef CONFIG_CPU_FREQ |
| int cpufreq_boost_trigger_state(int state); |
| int cpufreq_boost_supported(void); |
| int cpufreq_boost_enabled(void); |
| int cpufreq_enable_boost_support(void); |
| bool policy_has_boost_freq(struct cpufreq_policy *policy); |
| #else |
| static inline int cpufreq_boost_trigger_state(int state) |
| { |
| return 0; |
| } |
| static inline int cpufreq_boost_supported(void) |
| { |
| return 0; |
| } |
| static inline int cpufreq_boost_enabled(void) |
| { |
| return 0; |
| } |
| |
| static inline int cpufreq_enable_boost_support(void) |
| { |
| return -EINVAL; |
| } |
| |
| static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) |
| { |
| return false; |
| } |
| #endif |
| /* the following funtion is for cpufreq core use only */ |
| struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu); |
| |
| /* the following are really really optional */ |
| extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; |
| extern struct freq_attr *cpufreq_generic_attr[]; |
| int cpufreq_table_validate_and_show(struct cpufreq_policy *policy, |
| struct cpufreq_frequency_table *table); |
| |
| unsigned int cpufreq_generic_get(unsigned int cpu); |
| int cpufreq_generic_init(struct cpufreq_policy *policy, |
| struct cpufreq_frequency_table *table, |
| unsigned int transition_latency); |
| #endif /* _LINUX_CPUFREQ_H */ |