#ifndef _LINUX_CPUFREQ_H
#define _LINUX_CPUFREQ_H
+#include <linux/mutex.h>
#include <linux/config.h>
#include <linux/notifier.h>
#include <linux/threads.h>
#include <linux/kobject.h>
#include <linux/sysfs.h>
#include <linux/completion.h>
+#include <linux/workqueue.h>
+#include <linux/cpumask.h>
+#include <asm/div64.h>
#define CPUFREQ_NAME_LEN 16
/* Frequency values here are CPU kHz so that hardware which doesn't run
* with some frequencies can complain without having to guess what per
* cent / per mille means.
- * Maximum transition latency is in microseconds - if it's unknown,
+ * Maximum transition latency is in nanoseconds - if it's unknown,
* CPUFREQ_ETERNAL shall be used.
*/
};
struct cpufreq_policy {
- unsigned int cpu; /* cpu nr */
+ cpumask_t cpus; /* affected CPUs */
+ unsigned int cpu; /* cpu nr of registered CPU */
struct cpufreq_cpuinfo cpuinfo;/* see above */
unsigned int min; /* in kHz */
unsigned int policy; /* see above */
struct cpufreq_governor *governor; /* see below */
- struct semaphore lock; /* CPU ->setpolicy or ->target may
+ struct mutex lock; /* CPU ->setpolicy or ->target may
only be called once a time */
+ struct work_struct update; /* if update_policy() needs to be
+ * called, but you're in IRQ context */
+
struct cpufreq_real_policy user_policy;
struct kobject kobj;
#define CPUFREQ_PRECHANGE (0)
#define CPUFREQ_POSTCHANGE (1)
+#define CPUFREQ_RESUMECHANGE (8)
+#define CPUFREQ_SUSPENDCHANGE (9)
struct cpufreq_freqs {
unsigned int cpu; /* cpu nr */
unsigned int old;
unsigned int new;
+ u8 flags; /* flags of cpufreq_driver, see below. */
};
unsigned int target_freq,
unsigned int relation);
+ /* should be defined, if possible */
+ unsigned int (*get) (unsigned int cpu);
+
/* optional */
int (*exit) (struct cpufreq_policy *policy);
+ int (*suspend) (struct cpufreq_policy *policy, pm_message_t pmsg);
int (*resume) (struct cpufreq_policy *policy);
struct freq_attr **attr;
};
/* flags */
-#define CPUFREQ_STICKY 0x01 /* the driver isn't removed even if
- all ->init() calls failed */
+#define CPUFREQ_STICKY 0x01 /* the driver isn't removed even if
+ * all ->init() calls failed */
+#define CPUFREQ_CONST_LOOPS 0x02 /* loops_per_jiffy or other kernel
+ * "constants" aren't affected by
+ * frequency transitions */
+#define CPUFREQ_PM_NO_WARN 0x04 /* don't warn on suspend/resume speed
+ * mismatches */
int cpufreq_register_driver(struct cpufreq_driver *driver_data);
int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
int cpufreq_update_policy(unsigned int cpu);
-/* the proc_intf.c needs this */
-int cpufreq_parse_governor (char *str_governor, unsigned int *policy, struct cpufreq_governor **governor);
-
-
-/*********************************************************************
- * CPUFREQ USERSPACE GOVERNOR *
- *********************************************************************/
-int cpufreq_gov_userspace_init(void);
-
-#ifdef CONFIG_CPU_FREQ_24_API
-
-int cpufreq_setmax(unsigned int cpu);
-int cpufreq_set(unsigned int kHz, unsigned int cpu);
+/* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */
unsigned int cpufreq_get(unsigned int cpu);
-
-/* /proc/sys/cpu */
-enum {
- CPU_NR = 1, /* compatibilty reasons */
- CPU_NR_0 = 1,
- CPU_NR_1 = 2,
- CPU_NR_2 = 3,
- CPU_NR_3 = 4,
- CPU_NR_4 = 5,
- CPU_NR_5 = 6,
- CPU_NR_6 = 7,
- CPU_NR_7 = 8,
- CPU_NR_8 = 9,
- CPU_NR_9 = 10,
- CPU_NR_10 = 11,
- CPU_NR_11 = 12,
- CPU_NR_12 = 13,
- CPU_NR_13 = 14,
- CPU_NR_14 = 15,
- CPU_NR_15 = 16,
- CPU_NR_16 = 17,
- CPU_NR_17 = 18,
- CPU_NR_18 = 19,
- CPU_NR_19 = 20,
- CPU_NR_20 = 21,
- CPU_NR_21 = 22,
- CPU_NR_22 = 23,
- CPU_NR_23 = 24,
- CPU_NR_24 = 25,
- CPU_NR_25 = 26,
- CPU_NR_26 = 27,
- CPU_NR_27 = 28,
- CPU_NR_28 = 29,
- CPU_NR_29 = 30,
- CPU_NR_30 = 31,
- CPU_NR_31 = 32,
-};
-
-/* /proc/sys/cpu/{0,1,...,(NR_CPUS-1)} */
-enum {
- CPU_NR_FREQ_MAX = 1,
- CPU_NR_FREQ_MIN = 2,
- CPU_NR_FREQ = 3,
-};
-
-#endif /* CONFIG_CPU_FREQ_24_API */
+/* 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);
+#else
+static inline unsigned int cpufreq_quick_get(unsigned int cpu)
+{
+ return 0;
+}
+#endif
/*********************************************************************
unsigned int relation,
unsigned int *index);
+/* the following 3 funtions are for cpufreq core use only */
+struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu);
+struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
+void cpufreq_cpu_put (struct cpufreq_policy *data);
+
/* the following are really really optional */
extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
void cpufreq_frequency_table_put_attr(unsigned int cpu);
+/*********************************************************************
+ * UNIFIED DEBUG HELPERS *
+ *********************************************************************/
+
+#define CPUFREQ_DEBUG_CORE 1
+#define CPUFREQ_DEBUG_DRIVER 2
+#define CPUFREQ_DEBUG_GOVERNOR 4
+
+#ifdef CONFIG_CPU_FREQ_DEBUG
+
+extern void cpufreq_debug_printk(unsigned int type, const char *prefix,
+ const char *fmt, ...);
+
+#else
+
+#define cpufreq_debug_printk(msg...) do { } while(0)
+
+#endif /* CONFIG_CPU_FREQ_DEBUG */
+
#endif /* _LINUX_CPUFREQ_H */
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