Re: [RFC/PATCH v2 3/5] devicetree: bindings: Add new cpuidle enable method for Renesas R-car SoCs

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Hi Mark,

On Fri, Apr 17, 2015 at 9:46 PM, Mark Rutland <mark.rutland@xxxxxxx> wrote:
> On Thu, Apr 16, 2015 at 11:35:38AM +0100, Keita Kobayashi wrote:
>> This patch add the ARM CPUs Device Tree binding to document a new
>> enable method of Renesas cpuidle.
>>
>> Signed-off-by: Keita Kobayashi <keita.kobayashi.ym@xxxxxxxxxxx>
>> ---
>>  Documentation/devicetree/bindings/arm/cpus.txt | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
>> index 8b9e0a9..663ee11 100644
>> --- a/Documentation/devicetree/bindings/arm/cpus.txt
>> +++ b/Documentation/devicetree/bindings/arm/cpus.txt
>> @@ -196,6 +196,7 @@ nodes to be present and contain the properties described below.
>>                           "qcom,gcc-msm8660"
>>                           "qcom,kpss-acc-v1"
>>                           "qcom,kpss-acc-v2"
>> +                         "renesas,rcar-idle"
>
> The enable-method is about how to bring the CPU up (and potentially
> implies other things, like how to take it down again).

Thanks for your clarification. I now understand that this is related
to SMP boot and CPU Hotplug.

> These is no code in this series to that effect, no semantics are
> provided, and the name implies this is idle-specific.
>
> So this doesn't look right, and makes no sense to me.

Ok, I somehow (incorrectly?) assumed that the following line in patch
2/5* tied into this:
+CPUIDLE_METHOD_OF_DECLARE(rcar, "renesas,rcar-idle", &rcar_cpuidle_ops);

[*] [RFC/PATCH v2 2/5] ARM: shmobile: Add cpuidle_ops for R-Car cpuidle

But if it is unrelated it should of course be dropped or reworked.

Thanks,

/ magnus
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