[PATCHv7 05/10] devfreq: event: Add documentation for exynos-ppmu devfreq-event driver
Chanwoo Choi
cw00.choi at samsung.com
Mon Jan 12 00:38:50 PST 2015
Dear Myungjoo,
On 01/12/2015 05:11 PM, MyungJoo Ham wrote:
>
> I have rephrased part of the documentation for better readability.
> Some semantics is guessed so you may need to re-rephrase.
>
> Other than that, Acked-by: MyungJoo Ham <myungjoo.ham at samsung.com>
OK, I'll fix them according to your below comment.
Best Regards,
Chanwoo Choi
>
>
>> This patch adds the documentation for Exynos PPMU (Platform Performance
>> Monitoring Unit) devfreq-event driver.
>>
>> Cc: MyungJoo Ham <myungjoo.ham at samsung.com>
>> Cc: Kyungmin Park <kyungmin.park at samsung.com>
>> Signed-off-by: Chanwoo Choi <cw00.choi at samsung.com>
>> ---
>> .../bindings/devfreq/event/exynos-ppmu.txt | 110 +++++++++++++++++++++
>> 1 file changed, 110 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
>>
>> diff --git a/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
>> new file mode 100644
>> index 0000000..e665d30
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
>> @@ -0,0 +1,110 @@
>> +
>> +* Samsung Exynos PPMU (Performance Profiling Monitoring Unit) device
>> +
>> +The Samsung Exynos SoC have PPMU (Performance Profiling Monitoring Unit) for
>
> The Samsung Exynos SoC has PPMU (Performance Profiling Monitoring Unit) for
> (have->has)
>
>> +each IPs. PPMU provides the primitive values to get performance data. These
>
> each IP. PPMU provides primitive values to get performance data.
> (IPs->IP)
>
>> +events provide useful information about the behavior of the SoC that you can
>
> PPMU events provide information of the SoC's behaviors so that you may
>
>> +use when analyzing system performance, and made visible and can be counted
>
> use to analyze system performance, to make behaviors visible, and to count
>
>> +using login in each IP (DMC, CPU, RIGHTBUS, LEFTBUS, CAM interface, LCD, G3D,
>
> usages of each IP ( .... )
>
>> +MFC). The Exynos PPMU driver use the devfreq-event class to provide event data
>
> use -> uses
>
>> +to various devfreq device. The devfreq device would use the event data when
>
> device -> devices
>
>> +derterming the current state of each IP.
>> +
>> +Required properties:
>> +- compatible: Should be "samsung,exynos-ppmu".
>> +- reg: physical base address of each PPMU and length of memory mapped region.
>> +
>> +Optional properties:
>> +- clock-names : the name of clock used by the PPMU, "ppmu"
>> +- clocks : phandles for clock specified in "clock-names" property
>> +- #clock-cells: should be 1.
>> +
>
> []
>
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