| Message ID | 20230825111920.8257-1-sumitg@nvidia.com (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | viresh kumar |
| Headers | show |
| Series | cpufreq: tegra194: add online/offline hooks | expand |
On 25-08-23, 16:49, Sumit Gupta wrote: > 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: Viresh Kumar <viresh.kumar@linaro.org> > Signed-off-by: Sumit Gupta <sumitg@nvidia.com> > Link: https://lore.kernel.org/lkml/20230816033402.3abmugb5goypvllm@vireshk-i7/ > --- > drivers/cpufreq/tegra194-cpufreq.c | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c > index 66a9c23544db..09582696b83d 100644 > --- a/drivers/cpufreq/tegra194-cpufreq.c > +++ b/drivers/cpufreq/tegra194-cpufreq.c > @@ -510,6 +510,21 @@ 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_exit(struct cpufreq_policy *policy) > { > struct device *cpu_dev = get_cpu_device(policy->cpu); > @@ -548,6 +563,8 @@ static struct cpufreq_driver tegra194_cpufreq_driver = { > .get = tegra194_get_speed, > .init = tegra194_cpufreq_init, > .exit = tegra194_cpufreq_exit, > + .online = tegra194_cpufreq_online, > + .offline = tegra194_cpufreq_offline, > .attr = cpufreq_generic_attr, > }; Applied. Thanks.
diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c index 66a9c23544db..09582696b83d 100644 --- a/drivers/cpufreq/tegra194-cpufreq.c +++ b/drivers/cpufreq/tegra194-cpufreq.c @@ -510,6 +510,21 @@ 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_exit(struct cpufreq_policy *policy) { struct device *cpu_dev = get_cpu_device(policy->cpu); @@ -548,6 +563,8 @@ static struct cpufreq_driver tegra194_cpufreq_driver = { .get = tegra194_get_speed, .init = tegra194_cpufreq_init, .exit = tegra194_cpufreq_exit, + .online = tegra194_cpufreq_online, + .offline = tegra194_cpufreq_offline, .attr = cpufreq_generic_attr, };
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: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Sumit Gupta <sumitg@nvidia.com> Link: https://lore.kernel.org/lkml/20230816033402.3abmugb5goypvllm@vireshk-i7/ --- drivers/cpufreq/tegra194-cpufreq.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)