[PATCH] cpufreq: Governor poll frequency tuneables exported in config.

[Mike Chan]

    cpufreq: Governor poll frequency tuneables exported in config.
    
    Signed-off-by: Mike Chan <mike@xxxxxxxxxxx>

diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 5f076ae..e9361a9 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -190,4 +190,17 @@ config CPU_FREQ_GOV_CONSERVATIVE
 
 	  If in doubt, say N.
 
+config CPU_FREQ_MIN_TICKS
+	int "Ticks between governor polling interval."
+	default 10
+	help
+	  Minimum number of ticks between polling interval for governors.
+
+config CPU_FREQ_SAMPLING_LATENCY_MULTIPLIER
+	int "Sampling rate multiplier for governors."
+	default 1000
+	help
+	  Sampling latency rate multiplied by the cpu switch latency.
+	  Affects governor polling.
+
 endif	# CPU_FREQ
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index ac0bbf2..7bc227e 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -51,11 +51,10 @@ static unsigned int def_sampling_rate;
 #define MIN_SAMPLING_RATE_RATIO			(2)
 /* for correct statistics, we need at least 10 ticks between each measure */
 #define MIN_STAT_SAMPLING_RATE			\
-			(MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(10))
+	(MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(CONFIG_CPU_FREQ_MIN_TICKS))
 #define MIN_SAMPLING_RATE			\
 			(def_sampling_rate / MIN_SAMPLING_RATE_RATIO)
 #define MAX_SAMPLING_RATE			(500 * def_sampling_rate)
-#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER	(1000)
 #define DEF_SAMPLING_DOWN_FACTOR		(1)
 #define MAX_SAMPLING_DOWN_FACTOR		(10)
 #define TRANSITION_LATENCY_LIMIT		(10 * 1000 * 1000)
@@ -523,7 +522,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
 				latency = 1;
 
 			def_sampling_rate = 10 * latency *
-					DEF_SAMPLING_RATE_LATENCY_MULTIPLIER;
+				CONFIG_CPU_FREQ_SAMPLING_LATENCY_MULTIPLIER;
 
 			if (def_sampling_rate < MIN_STAT_SAMPLING_RATE)
 				def_sampling_rate = MIN_STAT_SAMPLING_RATE;
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index 33855cb..c7df643 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -42,11 +42,10 @@ static unsigned int def_sampling_rate;
 #define MIN_SAMPLING_RATE_RATIO			(2)
 /* for correct statistics, we need at least 10 ticks between each measure */
 #define MIN_STAT_SAMPLING_RATE 			\
-			(MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(10))
+	(MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(CONFIG_CPU_FREQ_MIN_TICKS))
 #define MIN_SAMPLING_RATE			\
 			(def_sampling_rate / MIN_SAMPLING_RATE_RATIO)
 #define MAX_SAMPLING_RATE			(500 * def_sampling_rate)
-#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER	(1000)
 #define TRANSITION_LATENCY_LIMIT		(10 * 1000 * 1000)
 
 static void do_dbs_timer(struct work_struct *work);
@@ -542,7 +541,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
 				latency = 1;
 
 			def_sampling_rate = latency *
-					DEF_SAMPLING_RATE_LATENCY_MULTIPLIER;
+				CONFIG_CPU_FREQ_SAMPLING_LATENCY_MULTIPLIER;
 
 			if (def_sampling_rate < MIN_STAT_SAMPLING_RATE)
 				def_sampling_rate = MIN_STAT_SAMPLING_RATE;
--
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