Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1223818

Re: [PATCH 2/2] Documentation: bindings: add description of phy for sdhci-of-arasan

Show all headers | View raw

在 2015/9/14 10:47, Sören Brinkmann 写道:
> Hi Shawn,
>
> On Fri, 2015-09-11 at 04:55PM +0800, Shawn Lin wrote:
>> This patch adds phys and phy-names for sdhci-of-arasan as optional
>> properties, and details the example as well.
>>
>> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
>> ---
>>
>>   Documentation/devicetree/bindings/mmc/arasan,sdhci.txt | 10 ++++++++--
>>   1 file changed, 8 insertions(+), 2 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
>> index da541c3..0264d5f 100644
>> --- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
>> +++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
>> @@ -1,11 +1,12 @@
>>   Device Tree Bindings for the Arasan SDHCI Controller
>>
>> -  The bindings follow the mmc[1], clock[2] and interrupt[3] bindings. Only
>> -  deviations are documented here.
>> +  The bindings follow the mmc[1], clock[2], interrupt[3] and phy[4] 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
>>
>>   Required Properties:
>>     - compatible: Compatibility string. Must be 'arasan,sdhci-8.9a' or
>> @@ -16,6 +17,9 @@ Required Properties:
>>     - interrupts: Interrupt specifier
>>     - interrupt-parent: Phandle for the interrupt controller that services
>>   		      interrupts for this device.
>> +Optional Properties:
>> +  - phys: From PHY bindings: Phandle for the Generic PHY for arasan.
>> +  - phy-names:  MUST be "phy_arasan".
>
> This might be a dumb question, but, is the external phy actually
> optional? Or is it mandatory for certain implementations of the IP.
> In the latter case, it should probably be a mandatory property depending
> on the compatible string matching an implementation that requires an
> external phy (accordingly, the implementation might have to treat it

 From my soc team's reponse, there is no way to bypass controller to IO 
if no phy supported. So it should be the latter case you mentioned for 
arasan.sdhci-5.1.

Thanks for point out it, really helpful.

I will fix it in v2.

> that way too).
>
> 	Sören
>
>
>


-- 
Best Regards
Shawn Lin

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

[PATCH 2/2] Documentation: bindings: add description of phy for sdhci-of-arasan Shawn Lin <shawn.lin@rock-chips.com> - 2015-09-11 11:00 +0200
  Re: [PATCH 2/2] Documentation: bindings: add description of phy for  sdhci-of-arasan Shawn Lin <shawn.lin@rock-chips.com> - 2015-09-14 05:10 +0200

csiph-web