netdev - Re: [PATCH 1/3] dt-bings: net: fsl,fec: update compatible item

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Date:   Thu, 18 Aug 2022 10:51:02 +0300
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Shawn Guo <shawnguo@...nel.org>
Cc:     Wei Fang <wei.fang@....com>, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        s.hauer@...gutronix.de, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        peng.fan@....com, ping.bai@....com, sudeep.holla@....com,
        linux-arm-kernel@...ts.infradead.org, aisheng.dong@....com
Subject: Re: [PATCH 1/3] dt-bings: net: fsl,fec: update compatible item

On 18/08/2022 04:33, Shawn Guo wrote:
> On Mon, Jul 04, 2022 at 11:12:09AM +0200, Krzysztof Kozlowski wrote:
>>> diff --git a/Documentation/devicetree/bindings/net/fsl,fec.yaml b/Documentation/devicetree/bindings/net/fsl,fec.yaml
>>> index daa2f79a294f..6642c246951b 100644
>>> --- a/Documentation/devicetree/bindings/net/fsl,fec.yaml
>>> +++ b/Documentation/devicetree/bindings/net/fsl,fec.yaml
>>> @@ -40,6 +40,10 @@ properties:
>>>            - enum:
>>>                - fsl,imx7d-fec
>>>            - const: fsl,imx6sx-fec
>>> +      - items:
>>> +          - enum:
>>> +              - fsl,imx8ulp-fec
>>> +          - const: fsl,imx6ul-fec
>>
>> This is wrong.  fsl,imx6ul-fec has to be followed by fsl,imx6q-fec. I
>> think someone made similar mistakes earlier so this is a mess.
> 
> Hmm, not sure I follow this.  Supposing we want to have the following
> compatible for i.MX8ULP FEC, why do we have to have "fsl,imx6q-fec"
> here?
> 
> 	fec: ethernet@...50000 {
> 		compatible = "fsl,imx8ulp-fec", "fsl,imx6ul-fec";
> 		...
> 	};

Because a bit earlier this bindings is saying that fsl,imx6ul-fec must
be followed by fsl,imx6q-fec.

Best regards,
Krzysztof