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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2014-12-04 09:41:49 +0530 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2014-12-08 12:08:55 -0400 |
| commit | 07d888d831b038c01c5415f8945f41c743f49fb2 (patch) | |
| tree | 33c5bbd0b0f50f1515493244e12c1bda01bf5d40 /drivers/thermal/cpu_cooling.c | |
| parent | beca6053fc21bbe0ed0242a3f79c0cca5749a90f (diff) | |
| download | linux-0-day-07d888d831b038c01c5415f8945f41c743f49fb2.tar.gz linux-0-day-07d888d831b038c01c5415f8945f41c743f49fb2.tar.xz | |
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>
Diffstat (limited to 'drivers/thermal/cpu_cooling.c')
| -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 cc10641be111d..a5a931726aed2 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 |