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cpufreq: dt: Implement rockchip_cpufreq_suspend()

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Set CPU voltage to low temperature voltage before system suspend,
so that it can resume successfully at low temperature.

Change-Id: Ib9ab16558ff69ea80e862473ef9ec6bfa7cd61ad
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
This commit is contained in:
Finley Xiao
2019-01-25 15:55:00 +08:00
parent 596651a047
commit 7175d2320b
1 changed files with 16 additions and 0 deletions
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16
drivers/cpufreq/cpufreq-dt.c
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@@ -409,6 +409,18 @@ static void cpufreq_ready(struct cpufreq_policy *policy)
of_node_put(np);
}
static int rockchip_cpufreq_suspend(struct cpufreq_policy *policy)
{
struct private_data *priv = policy->driver_data;
int ret = 0;
ret = cpufreq_generic_suspend(policy);
if (!ret)
rockchip_cpu_suspend_low_temp_adjust(priv->opp_info);
return ret;
}
static struct cpufreq_driver dt_cpufreq_driver = {
.flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK |
CPUFREQ_HAVE_GOVERNOR_PER_POLICY,
@@ -420,7 +432,11 @@ static struct cpufreq_driver dt_cpufreq_driver = {
.ready = cpufreq_ready,
.name = "cpufreq-dt",
.attr = cpufreq_dt_attr,
#ifdef CONFIG_ARCH_ROCKCHIP
.suspend = rockchip_cpufreq_suspend,
#else
.suspend = cpufreq_generic_suspend,
#endif
};
static int dt_cpufreq_probe(struct platform_device *pdev)