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| author |   Viresh Kumar <viresh.kumar@linaro.org> | 2019-07-23 11:44:10 +0530 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-09-02 22:44:05 +0200 |
| commit | c27c38afd871f54b40bd40172cb4e23fba01113c (patch) | |
| tree | 5e115fc2b51cad51508df91dc3eb4483c2a6920a /Documentation/cpu-freq | |
| parent | cpufreq: Remove CPUFREQ_ADJUST and CPUFREQ_NOTIFY policy notifier events (diff) | |
| download | linux-dev-c27c38afd871f54b40bd40172cb4e23fba01113c.tar.xz linux-dev-c27c38afd871f54b40bd40172cb4e23fba01113c.zip | |
Documentation: cpufreq: Update policy notifier documentation
Update documentation with the recent policy notifier updates.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation/cpu-freq')
| -rw-r--r-- | Documentation/cpu-freq/core.txt | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/Documentation/cpu-freq/core.txt b/Documentation/cpu-freq/core.txt index 55193e680250..ed577d9c154b 100644 --- a/Documentation/cpu-freq/core.txt +++ b/Documentation/cpu-freq/core.txt @@ -57,19 +57,11 @@ transition notifiers. 2.1 CPUFreq policy notifiers ---------------------------- -These are notified when a new policy is intended to be set. Each -CPUFreq policy notifier is called twice for a policy transition: +These are notified when a new policy is created or removed. -1.) During CPUFREQ_ADJUST all CPUFreq notifiers may change the limit if - they see a need for this - may it be thermal considerations or - hardware limitations. - -2.) And during CPUFREQ_NOTIFY all notifiers are informed of the new policy - - if two hardware drivers failed to agree on a new policy before this - stage, the incompatible hardware shall be shut down, and the user - informed of this. - -The phase is specified in the second argument to the notifier. +The phase is specified in the second argument to the notifier. The phase is +CPUFREQ_CREATE_POLICY when the policy is first created and it is +CPUFREQ_REMOVE_POLICY when the policy is removed. The third argument, a void *pointer, points to a struct cpufreq_policy consisting of several values, including min, max (the lower and upper |