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authorAmit Daniel Kachhap <amit.daniel@samsung.com>2013-08-07 16:46:11 +0530
committerViresh Kumar <viresh.kumar@linaro.org>2013-08-12 12:00:18 +0530
commitc721d15a5cc1dade16f068123070c570378c5cc0 (patch)
tree5ce80b3b5efc2c20a82b4af1709127a9d17d9385 /drivers/cpufreq
parentd4e4ab86bcba5a72779c43dc1459f71fea3d89c8 (diff)
downloadlinux-c721d15a5cc1dade16f068123070c570378c5cc0.tar.bz2
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>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/exynos5440-cpufreq.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cpufreq/exynos5440-cpufreq.c b/drivers/cpufreq/exynos5440-cpufreq.c
index 0c74018eda47..d514c152fd1a 100644
--- a/drivers/cpufreq/exynos5440-cpufreq.c
+++ b/drivers/cpufreq/exynos5440-cpufreq.c
@@ -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 */