linux-kernel - Re: [PATCH 1/6] dt-bindings: phy: ti: phy-gmii-sel: Add bindings for J721e

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Date:   Wed, 21 Sep 2022 12:53:38 +0530
From:   Siddharth Vadapalli <s-vadapalli@...com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <krzysztof.kozlowski+dt@...aro.org>
CC:     <robh+dt@...nel.org>, <lee.jones@...aro.org>, <kishon@...com>,
        <vkoul@...nel.org>, <dan.carpenter@...cle.com>,
        <rogerq@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>, <sjakhade@...ence.com>,
        <s-vadapalli@...com>
Subject: Re: [PATCH 1/6] dt-bindings: phy: ti: phy-gmii-sel: Add bindings for
 J721e

Hello Krzysztof,

On 21/09/22 12:09, Krzysztof Kozlowski wrote:
> On 20/09/2022 06:27, Siddharth Vadapalli wrote:
>> Hello Krzysztof,
>>
>>>> +    then:
>>>> +      properties:
>>>> +        ti,qsgmii-main-ports:
>>>> +          minItems: 2
>>>> +          maxItems: 2
>>>> +          items:
>>>> +            minimum: 1
>>>> +            maximum: 8
>>>> +
>>>>    - if:
>>>>        not:
>>>>          properties:
>>>> @@ -94,6 +133,7 @@ allOf:
>>>>              contains:
>>>>                enum:
>>>>                  - ti,j7200-cpsw5g-phy-gmii-sel
>>>> +                - ti,j721e-cpsw9g-phy-gmii-sel
>>>>      then:
>>>>        properties:
>>>>          ti,qsgmii-main-ports: false
>>>
>>> This is interesting here... Did you test the bindings with your DTS?
>>
>> Yes, I tried it out with different compatibles in the DTS file for the
>> node, making sure that the property "ti,qsgmii-main-ports" is allowed
>> only for the "ti,j7200-cpsw5g-phy-gmii-sel" and the
>> "ti,j721e-cpsw9g-phy-gmii-sel" compatibles. Additionally, I also tested
>> that the "minItems", "maxItems", "minimum" and "maximum" checks apply.
>> All of the rules within the "allOf", are enforced one after the other in
>> sequence, based on my testing. Please let me know in case of any
>> suggestions to implement it in a better way.
> 
> Great! I think I see now what I missed previously. The last hunk with
> "ti,qsgmii-main-ports: false" is in a if: with negation ("not:")?

Yes, the newly added compatible "ti,j721e-cpsw9g-phy-gmii-sel" is placed
within an "if:" followed by a "not:", along with the already existing
"ti,j7200-cpsw5g-phy-gmii-sel" compatible. With this,
"ti,qsgmii-main-ports" is allowed only for the aforementioned
compatibles and disallowed for the rest.

Regards,
Siddharth.