redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

cpufreq: exynos5440: Fix to skip when new frequency same as current 

This patch fixes the issue of un-necessary setting the clock controller
when the new target frequency is same as the current one. This case usually
occurs with governors like ondemand which passes the target frequency as the
percentage of average frequency. This check is present in most of the cpufreq
drivers.

Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
hifive-unleashed-5.1
Amit Daniel Kachhap 2013-08-07 16:46:11 +05:30 committed by Viresh Kumar
parent d4e4ab86bc
commit c721d15a5c
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/cpufreq/exynos5440-cpufreq.c
View File

@ -238,6 +238,9 @@ static int exynos_target(struct cpufreq_policy *policy,
freqs.old = dvfs_info->cur_frequency;
freqs.new = freq_table[index].frequency;
if (freqs.old == freqs.new)
goto out;
cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
/* Set the target frequency in all C0_3_PSTATE register */