linux-kernel - Re: [PATCH linux-next] dt-bindings: usb: snps,dwc3: correct i.MX8MQ support

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Message-ID: <355d5dde-cc86-018c-85d5-51cf59bdb36a@linaro.org>
Date:   Mon, 20 Mar 2023 12:39:18 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Peng Fan <peng.fan@....com>,
        "Peng Fan (OSS)" <peng.fan@....nxp.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        Xu Yang <xu.yang_2@....com>
Cc:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>, Jun Li <jun.li@....com>
Subject: Re: [PATCH linux-next] dt-bindings: usb: snps,dwc3: correct i.MX8MQ
 support

On 20/03/2023 12:02, Peng Fan wrote:
>> Subject: Re: [PATCH linux-next] dt-bindings: usb: snps,dwc3: correct
>> i.MX8MQ support
>>
>> On 20/03/2023 03:07, Peng Fan (OSS) wrote:
>>> From: Peng Fan <peng.fan@....com>
>>>
>>> The previous i.MX8MQ support breaks rockchip,dwc3 support, so use
>>> select to restrict i.MX8MQ support and avoid break others.
>>>
>>> Fixes: 3754c41c7686 ("dt-bindings: usb: snps,dwc3: support i.MX8MQ")
>>> Signed-off-by: Peng Fan <peng.fan@....com>
>>> ---
>>>  .../devicetree/bindings/usb/snps,dwc3.yaml    | 21 ++++++++++++-------
>>>  1 file changed, 14 insertions(+), 7 deletions(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
>>> b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
>>> index 16c7d06c9172..6347a6769ee3 100644
>>> --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
>>> +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
>>> @@ -28,15 +28,22 @@ allOf:
>>>      else:
>>>        $ref: usb-xhci.yaml#
>>>
>>> +select:
>>> +  properties:
>>> +    compatible:
>>> +      contains:
>>> +        enum:
>>> +          - fsl,imx8mq-dwc3
>>
>> And what about all snps,dwc3 devices there (without specific compatible)?
>> Previously they were selected and now they are not... so you just disabled
>> schema for all of them.
> [Peng Fan] 
> 
> I am not sure how to address:
> https://lore.kernel.org/all/CAL_Jsq+nrqTX5ND3=+kFUmStx-+b=qpE_WsL_Le-YX8c285-5A@mail.gmail.com/
> 
> Rob suggested use select, but I am not sure how to use it here. Use
> an extra yaml file with select or else.
> 
>>
>>> +  required:
>>> +    - compatible
>>> +
>>>  properties:
>>>    compatible:
>>> -    oneOf:
>>> -      - items:
>>> -          - const: fsl,imx8mq-dwc3
>>
>> I don't understand why you remove your compatible.
> [Peng Fan] 
> 
> My last change drops 'contains' by mistake, and breaks

This I understand.

> rockchip,dwc3, so just bring back the original content

This is not a reason to make your compatible undocumented. You basically
revert your patch. It does not make any sense to me.


Best regards,
Krzysztof