Commit c9565417 authored by Hector Martin's avatar Hector Martin Committed by Viresh Kumar
Browse files

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



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: 6286bbb4 ("cpufreq: apple-soc: Add new driver to control Apple SoC CPU P-states")
Signed-off-by: default avatarHector Martin <marcan@marcan.st>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 53cd37c1

drivers/cpufreq/apple-soc-cpufreq.c

+2 −0
Original line number Diff line number Diff line
@@ -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)