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rk29: cpufreq: do not set vcore every time

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黄涛 2011-01-26 20:52:44 +08:00
parent 2cbc72d654
commit 3985fbb701
1 changed files with 5 additions and 2 deletions
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7
arch/arm/mach-rk29/cpufreq.c
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@ -46,6 +46,7 @@ static struct cpufreq_frequency_table freq_table[] = {
};
static struct clk *arm_clk;
static struct regulator *vcore;
static int vcore_uV;
static int rk29_cpufreq_verify(struct cpufreq_policy *policy)
{
@ -96,13 +97,14 @@ static int rk29_cpufreq_target(struct cpufreq_policy *policy, unsigned int targe
pr_debug("%d r %d (%d-%d) selected %d (%duV)\n", target_freq, relation, policy->min, policy->max, freq->frequency, freq->index);
#ifdef CONFIG_REGULATOR
if (vcore && freqs.new > freqs.old) {
if (vcore && freqs.new > freqs.old && vcore_uV != freq->index) {
err = regulator_set_voltage(vcore, freq->index, freq->index);
if (err) {
pr_err("fail to set vcore (%duV) for %dkHz: %d\n",
freq->index, freqs.new, err);
goto err_vol;
}
vcore_uV = freq->index;
}
#endif
@ -112,12 +114,13 @@ static int rk29_cpufreq_target(struct cpufreq_policy *policy, unsigned int targe
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
#ifdef CONFIG_REGULATOR
if (vcore && freqs.new < freqs.old) {
if (vcore && freqs.new < freqs.old && vcore_uV != freq->index) {
err = regulator_set_voltage(vcore, freq->index, freq->index);
if (err) {
pr_err("fail to set vcore (%duV) for %dkHz: %d\n",
freq->index, freqs.new, err);
}
vcore_uV = freq->index;
}
#endif