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| author | Sumit Gupta <sumitg@nvidia.com> | 2023-08-25 16:49:20 +0530 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2023-08-28 11:43:54 +0530 |
| commit | a3aa97be69a7cc14ddc2bb0add0b9c51cb74bf83 (patch) | |
| tree | 47bd474116b7f99ad3d5d863056a393d219c7340 | |
| parent | 5f19d0969a9a29cff7fbbb0f758c9246e3f6beaf (diff) | |
| download | linux-stable-a3aa97be69a7cc14ddc2bb0add0b9c51cb74bf83.tar.gz linux-stable-a3aa97be69a7cc14ddc2bb0add0b9c51cb74bf83.tar.bz2 linux-stable-a3aa97be69a7cc14ddc2bb0add0b9c51cb74bf83.zip | |
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: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Link: https://lore.kernel.org/lkml/20230816033402.3abmugb5goypvllm@vireshk-i7/
[ Viresh: Fixed rebase conflict ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
| -rw-r--r-- | drivers/cpufreq/tegra194-cpufreq.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c index c90b30469165..88df7e5a0573 100644 --- a/drivers/cpufreq/tegra194-cpufreq.c +++ b/drivers/cpufreq/tegra194-cpufreq.c @@ -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, }; |