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ondemand: add sysfs entry for down_diff_multi_core

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This change adds sysfs entry for the ondemand governor's attribute
down_differential_multi_core. This is required to be able to program
this knob to attain better perf/power for use cases like camcorder.

CRs-fixed: 561456
Change-Id: Ib7c1223215c6b714c286c231ed37f3abfae741c6
Signed-off-by: Krishna Vanka <kvanka@codeaurora.org>
This commit is contained in:
Krishna Vanka 2013-12-11 14:56:15 +05:30 committed by Zhao Wei Liew
parent d72e245daa
commit 763f14bada
1 changed files with 17 additions and 0 deletions
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17
drivers/cpufreq/cpufreq_ondemand.c
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@ -318,6 +318,7 @@ show_one(up_threshold_multi_core, up_threshold_multi_core);
show_one(down_differential, down_differential);
show_one(sampling_down_factor, sampling_down_factor);
show_one(ignore_nice_load, ignore_nice);
show_one(down_differential_multi_core, down_differential_multi_core);
show_one(optimal_freq, optimal_freq);
show_one(up_threshold_any_cpu_load, up_threshold_any_cpu_load);
show_one(sync_freq, sync_freq);
@ -437,6 +438,20 @@ static ssize_t store_io_is_busy(struct kobject *a, struct attribute *b,
return count;
}
static ssize_t store_down_differential_multi_core(struct kobject *a,
struct attribute *b, const char *buf, size_t count)
{
unsigned int input;
int ret;
ret = sscanf(buf, "%u", &input);
if (ret != 1)
return -EINVAL;
dbs_tuners_ins.down_differential_multi_core = input;
return count;
}
static ssize_t store_optimal_freq(struct kobject *a, struct attribute *b,
const char *buf, size_t count)
{
@ -695,6 +710,7 @@ define_one_global_rw(sampling_down_factor);
define_one_global_rw(ignore_nice_load);
define_one_global_rw(powersave_bias);
define_one_global_rw(up_threshold_multi_core);
define_one_global_rw(down_differential_multi_core);
define_one_global_rw(optimal_freq);
define_one_global_rw(up_threshold_any_cpu_load);
define_one_global_rw(sync_freq);
@ -710,6 +726,7 @@ static struct attribute *dbs_attributes[] = {
&powersave_bias.attr,
&io_is_busy.attr,
&up_threshold_multi_core.attr,
&down_differential_multi_core.attr,
&optimal_freq.attr,
&up_threshold_any_cpu_load.attr,
&sync_freq.attr,