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

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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 <[email protected]>
Cc: Rafael J. Wysocki <[email protected]>
Cc: Kukjin Kim <[email protected]>
Signed-off-by: Amit Daniel Kachhap <[email protected]>
Signed-off-by: Viresh Kumar <[email protected]>
This commit is contained in:
Amit Daniel Kachhap 2013-08-07 16:46:11 +05:30 • committed by Viresh Kumar
commit c721d15a5c
1 changed files with 3 additions and 0 deletions
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3
drivers/cpufreq/exynos5440-cpufreq.c
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@ -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 */