diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2014-12-04 09:41:49 +0530 |
|---|---|---|
| committer | Kevin Hilman <khilman@linaro.org> | 2015-06-05 15:42:11 -0700 |
| commit | a288067ecfe0cf0a608ef3b7f73164922f668954 (patch) | |
| tree | 27d61ad667e017522e6708d468519dc7a1e9ca1f | |
| parent | 50b525a1fd0b5ee9bc67bcf9cdd4d541dede0109 (diff) | |
thermal: cpu_cooling: Add comment to clarify relation between cooling state and frequency
This wasn't explained well anywhere and should be clearly specified. Lets add a
top level comment for this.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
(cherry picked from commit 07d888d831b038c01c5415f8945f41c743f49fb2)
Signed-off-by: Kevin Hilman <khilman@linaro.org>
| -rw-r--r-- | drivers/thermal/cpu_cooling.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c index cc10641be111..a5a931726aed 100644 --- a/drivers/thermal/cpu_cooling.c +++ b/drivers/thermal/cpu_cooling.c @@ -28,6 +28,20 @@ #include <linux/cpu.h> #include <linux/cpu_cooling.h> +/* + * Cooling state <-> CPUFreq frequency + * + * Cooling states are translated to frequencies throughout this driver and this + * is the relation between them. + * + * Highest cooling state corresponds to lowest possible frequency. + * + * i.e. + * level 0 --> 1st Max Freq + * level 1 --> 2nd Max Freq + * ... + */ + /** * struct cpufreq_cooling_device - data for cooling device with cpufreq * @id: unique integer value corresponding to each cpufreq_cooling_device |