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

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Date:   Mon, 20 Mar 2023 11:44:25 +0000
From:   Peng Fan <peng.fan@....com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        "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

> 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://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore
> > .kernel.org%2Fall%2FCAL_Jsq%2BnrqTX5ND3%3D%2BkFUmStx-
> %2Bb%3DqpE_WsL_Le
> > -YX8c285-
> 5A%40mail.gmail.com%2F&data=05%7C01%7Cpeng.fan%40nxp.com%7C1e
> >
> 67df79692243f058fa08db2937befd%7C686ea1d3bc2b4c6fa92cd99c5c30163
> 5%7C0%
> >
> 7C0%7C638149091586933618%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC
> 4wLjAwMDAiL
> >
> CJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&s
> data=r1
> > fesB1c%2B3YxohCGM36xySFucVU25WVYIMlpgGkdoWk%3D&reserved=0
> >
> > 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.
[Peng Fan] 

ok, let me think more. Honestly not have good idea (:
If you have any guidance, that would be helpful.

Thanks,
Peng.

> 
> 
> Best regards,
> Krzysztof