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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>
This commit is contained in:
Viresh Kumar 2014-12-04 09:41:49 +05:30 committed by Eduardo Valentin
parent beca6053fc
commit 07d888d831
1 changed files with 14 additions and 0 deletions
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14
drivers/thermal/cpu_cooling.c
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@ -28,6 +28,20 @@
#include <linux/cpu.h> #include <linux/cpu.h>
#include <linux/cpu_cooling.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 * struct cpufreq_cooling_device - data for cooling device with cpufreq
* @id: unique integer value corresponding to each cpufreq_cooling_device * @id: unique integer value corresponding to each cpufreq_cooling_device