linux-kernel - Re: [PATCH 1/2] Documentation: mmc: sdhci-of-arasan: add description of power domain

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Date:   Mon, 29 Aug 2016 08:36:37 +0800
From:   Ziyuan Xu <xzy.xu@...k-chips.com>
To:     Shawn Lin <shawn.lin@...k-chips.com>, ulf.hansson@...aro.org,
        robh+dt@...nel.org, heiko@...ech.de
Cc:     linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH 1/2] Documentation: mmc: sdhci-of-arasan: add description
 of power domain



On 2016年08月27日 22:50, Shawn Lin wrote:
> On 2016/8/27 21:41, Ziyuan Xu wrote:
>> Add power domain as a optional property for sdhci-of-arasan, which can
>> be truned off in the so-called unused condition, such as suspend and
>> remove. Aim to lower power requirements.
>>
>> Signed-off-by: Ziyuan Xu <xzy.xu@...k-chips.com>
>>
>> ---
>>
>>  Documentation/devicetree/bindings/mmc/arasan,sdhci.txt | 6 +++++-
>>  1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt 
>> b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
>> index 3404afa..3f5189c 100644
>> --- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
>> +++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
>> @@ -1,12 +1,14 @@
>>  Device Tree Bindings for the Arasan SDHCI Controller
>>
>> -  The bindings follow the mmc[1], clock[2], interrupt[3] and phy[4] 
>> bindings.
>> +  The bindings follow the mmc[1], clock[2], interrupt[3], phy[4] and 
>> power
>> +  domain[5] bindings.
>>    Only deviations are documented here.
>>
>>    [1] Documentation/devicetree/bindings/mmc/mmc.txt
>>    [2] Documentation/devicetree/bindings/clock/clock-bindings.txt
>>    [3] 
>> Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
>>    [4] Documentation/devicetree/bindings/phy/phy-bindings.txt
>> +  [5] Documentation/devicetree/bindings/power/power_domain.txt
>>
>>  Required Properties:
>>    - compatible: Compatibility string.  One of:
>> @@ -36,6 +38,8 @@ Optional Properties:
>>    - #clock-cells: If specified this should be the value <0>.  With 
>> this property
>>      in place we will export a clock representing the Card Clock.  
>> This clock
>>      is expected to be consumed by our PHY.  You must also specify
>> +  - power-domains: A phandle of and PM domain as specifier defined 
>> by bindings
>
>     A phandle of what?

That's a typo.

>
>> +    of the power controller specified by phandle.
>>
>>  Example:
>>      sdhci@...00000 {
>
> It would be nice to add the example code.

Okay, I will show a sample code in V2.

Thanks, shawn.

>
>>
>
>