linux-kernel - Re: [PATCH v2 2/9] dt-bindings: riscv: microchip: document the aries m100pfsevp

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Message-ID: <27b8aa9e-9173-b40e-8f9c-a53fa5ba36c8@microchip.com>
Date:   Tue, 30 Aug 2022 15:25:57 +0000
From:   <Conor.Dooley@...rochip.com>
To:     <krzysztof.kozlowski@...aro.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <Daire.McNamara@...rochip.com>, <Shravan.Chippa@...rochip.com>
CC:     <paul.walmsley@...ive.com>, <palmer@...belt.com>,
        <aou@...s.berkeley.edu>, <Cyril.Jean@...rochip.com>,
        <Lewis.Hanly@...rochip.com>, <Praveen.Kumar@...rochip.com>,
        <wg@...es-embedded.de>, <Hugh.Breslin@...rochip.com>,
        <devicetree@...r.kernel.org>, <linux-riscv@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/9] dt-bindings: riscv: microchip: document the aries
 m100pfsevp

On 30/08/2022 15:37, Krzysztof Kozlowski wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> On 30/08/2022 13:17, Conor Dooley wrote:
>> Add compatibles for both configurations of the Aries Embedded
>> M100PFSEVP SOM + EVK platform.
>>
>> Link: https://www.aries-embedded.com/polarfire-soc-fpga-microsemi-m100pfs-som-mpfs025t-pcie-serdes
>> Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
>> ---
>>  Documentation/devicetree/bindings/riscv/microchip.yaml | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/riscv/microchip.yaml b/Documentation/devicetree/bindings/riscv/microchip.yaml
>> index 485981fbfb4b..04ebd48caaa7 100644
>> --- a/Documentation/devicetree/bindings/riscv/microchip.yaml
>> +++ b/Documentation/devicetree/bindings/riscv/microchip.yaml
>> @@ -27,9 +27,12 @@ properties:
>>
>>        - items:
>>            - enum:
>> +              - aries,m100pfsevp-emmc
>> +              - aries,m100pfsevp-sdcard
> 
> Usually sd card is pluggable, so what is the actual difference here? For
> example this one:
> https://shop.aries-embedded.de/evaluation-kit/m/m100pfsevp/445/m100pfsevp-250baab
> has eMMC and SD card...

Yeah, both are there but it is muxed by the bootloader using a GPIO. For
icicle this is done by a mux in the FPGA fabric instead. Tw dts were
needed so that the gpio-hog could be set correctly. Out of curiosity, I can
have the same compatible in multiple devicetrees right? In that case, it
would just be "aries,m100pfsevp" here and I could put that in both?
Would make things easier..

> 
>>                - sundance,polarberry
>>            - const: microchip,mpfs
>>
>> +
> 
> No need for line break.

Gah, that's a silly one to miss..

Conor.