linux-kernel - Re: [PATCH 1/2] dt-bindings: ARM: at91: Document Microchip SAMA5D29 Curiosity

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Message-ID: <d0296fbd-63d9-10af-4326-68857c6580be@microchip.com>
Date:   Mon, 11 Sep 2023 17:03:07 +0200
From:   Nicolas Ferre <nicolas.ferre@...rochip.com>
To:     Conor Dooley <conor@...nel.org>,
        Mihai Sain <mihai.sain@...rochip.com>
CC:     <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <alexandre.belloni@...tlin.com>,
        <claudiu.beznea@...rochip.com>, <andre.przywara@....com>,
        <andrei.simion@...rochip.com>, <jerry.ray@...rochip.com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <cristian.birsan@...rochip.com>
Subject: Re: [PATCH 1/2] dt-bindings: ARM: at91: Document Microchip SAMA5D29
 Curiosity

On 01/08/2023 at 17:35, Conor Dooley wrote:
>> diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.yaml b/Documentation/devicetree/bindings/arm/atmel-at91.yaml
>> index dfb8fd089197..89d75fbb1de4 100644
>> --- a/Documentation/devicetree/bindings/arm/atmel-at91.yaml
>> +++ b/Documentation/devicetree/bindings/arm/atmel-at91.yaml
>> @@ -79,6 +79,13 @@ properties:
>>             - const: atmel,sama5d2
>>             - const: atmel,sama5
>>   
>> +      - description: Microchip SAMA5D29 Curiosity
>> +        items:
>> +          - const: microchip,sama5d29-curiosity
>> +          - const: atmel,sama5d29
>> +          - const: atmel,sama5d2
>> +          - const: atmel,sama5
> What is the benefit of adding the two familial compatibles? Is there
> software that actually uses these?

"atmel,sama5d2" is used by arch/arm/mach-at91/sama5.c file
"atmel,sama5" is used by drivers/soc/atmel/soc.c file, so yes they are 
needed to instantiate a sama5d29 SoC.

Best regards,
   Nicolas