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.ku...@linaro.org> --- drivers/cpufreq/cpufreq-dt.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c index 7ba392911cd0..1aefaa1b0ca2 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -295,6 +295,21 @@ static int cpufreq_init(struct cpufreq_policy *policy) 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, -- 2.20.1.321.g9e740568ce00