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cpufreq: apple-soc: Switch to the lowest frequency on suspend

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Without this, the CPUs are left in a random pstate. Since we don't
support deep idle yet (which powers down the CPUs), this results in
significantly increased idle power consumption in suspend.

Fixes: 6286bbb40576 ("cpufreq: apple-soc: Add new driver to control Apple SoC CPU P-states")
Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Hector Martin 2023-01-04 19:21:49 +09:00 committed by Viresh Kumar
parent 53cd37c136
commit c956541736
1 changed files with 2 additions and 0 deletions
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drivers/cpufreq/apple-soc-cpufreq.c
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@ -280,6 +280,7 @@ static int apple_soc_cpufreq_init(struct cpufreq_policy *policy)
policy->cpuinfo.transition_latency = transition_latency;
policy->dvfs_possible_from_any_cpu = true;
policy->fast_switch_possible = true;
policy->suspend_freq = freq_table[0].frequency;
if (policy_has_boost_freq(policy)) {
ret = cpufreq_enable_boost_support();
@ -328,6 +329,7 @@ static struct cpufreq_driver apple_soc_cpufreq_driver = {
.fast_switch = apple_soc_cpufreq_fast_switch,
.register_em = cpufreq_register_em_with_opp,
.attr = apple_soc_cpufreq_hw_attr,
.suspend = cpufreq_generic_suspend,
};
static int __init apple_soc_cpufreq_module_init(void)