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cpufreq: exynos: Check old & new frequency early

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If old & new freq have the same frequency, no need to call
cpufreq notifier & regulator function.

Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Jonghwan Choi 2012-12-23 15:57:39 -08:00 committed by Kukjin Kim
parent 184cddd1e0
commit 857d90f701
1 changed files with 5 additions and 2 deletions
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7
drivers/cpufreq/exynos-cpufreq.c
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@ -87,6 +87,9 @@ static int exynos_target(struct cpufreq_policy *policy,
freqs.new = freq_table[index].frequency;
freqs.cpu = policy->cpu;
if (freqs.new == freqs.old)
goto out;
/*
* ARM clock source will be changed APLL to MPLL temporary
* To support this level, need to control regulator for
@ -113,8 +116,8 @@ static int exynos_target(struct cpufreq_policy *policy,
if (safe_arm_volt)
regulator_set_voltage(arm_regulator, safe_arm_volt,
safe_arm_volt);
if (freqs.new != freqs.old)
exynos_info->set_freq(old_index, index);
exynos_info->set_freq(old_index, index);
for_each_cpu(freqs.cpu, policy->cpus)
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);