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Commit 379480d8 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

cpufreq: Move governor symbols to cpufreq.h 



Move definitions of symbols related to transition latency and
sampling rate to include/linux/cpufreq.h so they can be used by
(future) goverernors located outside of drivers/cpufreq/.

No functional changes.

Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 66893b6a

drivers/cpufreq/cpufreq_governor.h

+0 −14
Original line number Diff line number Diff line
@@ -24,20 +24,6 @@ 
#include <linux/module.h>

#include <linux/mutex.h>



/*

 * The polling frequency depends on the capability of the processor. Default

 * polling frequency is 1000 times the transition latency of the processor. The

 * governor will work on any processor with transition latency <= 10ms, using

 * appropriate sampling rate.

 *

 * For CPUs with transition latency > 10ms (mostly drivers with CPUFREQ_ETERNAL)

 * this governor will not work. All times here are in us (micro seconds).

 */

#define MIN_SAMPLING_RATE_RATIO			(2)

#define LATENCY_MULTIPLIER			(1000)

#define MIN_LATENCY_MULTIPLIER			(20)

#define TRANSITION_LATENCY_LIMIT		(10 * 1000 * 1000)



/* Ondemand Sampling types */

enum {OD_NORMAL_SAMPLE, OD_SUB_SAMPLE};

include/linux/cpufreq.h

+14 −0
Original line number Diff line number Diff line
@@ -426,6 +426,20 @@ static inline unsigned long cpufreq_scale(unsigned long old, u_int div, 
#define CPUFREQ_POLICY_POWERSAVE	(1)

#define CPUFREQ_POLICY_PERFORMANCE	(2)



/*

 * The polling frequency depends on the capability of the processor. Default

 * polling frequency is 1000 times the transition latency of the processor. The

 * ondemand governor will work on any processor with transition latency <= 10ms,

 * using appropriate sampling rate.

 *

 * For CPUs with transition latency > 10ms (mostly drivers with CPUFREQ_ETERNAL)

 * the ondemand governor will not work. All times here are in us (microseconds).

 */

#define MIN_SAMPLING_RATE_RATIO		(2)

#define LATENCY_MULTIPLIER		(1000)

#define MIN_LATENCY_MULTIPLIER		(20)

#define TRANSITION_LATENCY_LIMIT	(10 * 1000 * 1000)



/* Governor Events */

#define CPUFREQ_GOV_START	1

#define CPUFREQ_GOV_STOP	2