Commit a3aa97be authored by Sumit Gupta's avatar Sumit Gupta Committed by Viresh Kumar
Browse files

cpufreq: tegra194: add online/offline hooks 



Implement the light-weight tear down and bring up helpers to reduce the
amount of work to do on CPU offline/online operation.
This change helps to make the hotplugging paths much faster.

Suggested-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarSumit Gupta <sumitg@nvidia.com>
Link: https://lore.kernel.org/lkml/20230816033402.3abmugb5goypvllm@vireshk-i7/


[ Viresh: Fixed rebase conflict ]
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 5f19d096

drivers/cpufreq/tegra194-cpufreq.c

+17 −0
Original line number Diff line number Diff line
@@ -508,6 +508,21 @@ static int tegra194_cpufreq_init(struct cpufreq_policy *policy) 
	return 0;

}



static int tegra194_cpufreq_online(struct cpufreq_policy *policy)

{

	/* We did light-weight tear down earlier, nothing to do here */

	return 0;

}



static int tegra194_cpufreq_offline(struct cpufreq_policy *policy)

{

	/*

	 * Preserve policy->driver_data and don't free resources on light-weight

	 * tear down.

	 */

	return 0;

}



static int tegra194_cpufreq_set_target(struct cpufreq_policy *policy,

				       unsigned int index)

{
@@ -535,6 +550,8 @@ static struct cpufreq_driver tegra194_cpufreq_driver = { 
	.target_index = tegra194_cpufreq_set_target,

	.get = tegra194_get_speed,

	.init = tegra194_cpufreq_init,

	.online = tegra194_cpufreq_online,

	.offline = tegra194_cpufreq_offline,

	.attr = cpufreq_generic_attr,

};