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cpufreq: dt: Implement online/offline() callbacks

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Implement the light-weight tear down and bring up helpers to reduce the
amount of work to do on CPU offline/online operation.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2019-02-12 12:36:47 +05:30 committed by Rafael J. Wysocki
parent 91a12e91dc
commit 263abfe74b
1 changed files with 17 additions and 0 deletions
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17
drivers/cpufreq/cpufreq-dt.c
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@ -295,6 +295,21 @@ out_put_clk:
return ret;
}
static int cpufreq_online(struct cpufreq_policy *policy)
{
/* We did light-weight tear down earlier, nothing to do here */
return 0;
}
static int cpufreq_offline(struct cpufreq_policy *policy)
{
/*
* Preserve policy->driver_data and don't free resources on light-weight
* tear down.
*/
return 0;
}
static int cpufreq_exit(struct cpufreq_policy *policy)
{
struct private_data *priv = policy->driver_data;
@ -319,6 +334,8 @@ static struct cpufreq_driver dt_cpufreq_driver = {
.get = cpufreq_generic_get,
.init = cpufreq_init,
.exit = cpufreq_exit,
.online = cpufreq_online,
.offline = cpufreq_offline,
.name = "cpufreq-dt",
.attr = cpufreq_dt_attr,
.suspend = cpufreq_generic_suspend,