linux-kernel - Re: [PATCH 1/4] dt-bindings: usb: typec: add bindings for stm32g0 controller

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Message-ID: <0821acfe-bcfe-b1d8-c1a9-81023f4ab6a0@linaro.org>
Date:   Mon, 4 Jul 2022 09:55:33 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Fabrice Gasnier <fabrice.gasnier@...s.st.com>, robh+dt@...nel.org
Cc:     krzysztof.kozlowski+dt@...aro.org, devicetree@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        amelie.delaunay@...s.st.com, alexandre.torgue@...s.st.com,
        gregkh@...uxfoundation.org, heikki.krogerus@...ux.intel.com
Subject: Re: [PATCH 1/4] dt-bindings: usb: typec: add bindings for stm32g0
 controller

On 01/07/2022 12:04, Fabrice Gasnier wrote:
> 
> Then I no longer get this warning upon build. But the dtbs_check complains:
> ---
> connector: ports: 'port@0' is a required property
> 	From schema: ..
> Documentation/devicetree/bindings/connector/usb-connector.yaml
> 
> So It looks like to me there's something missing to handle the single
> port case in usb-connector.yaml, when using the "ports".
> 
> Maybe usb-connector could be updated to handle "port" (w/o unit-addr) ?

Not really, the dtc warning looks false-positive. Especially that you
need port@1 for USB 3.0 (super speed), unless you do not support it?

> I'm talking about:
>     required:
>       - port@0
> 
> So, I came up with:
> 
> --- a/Documentation/devicetree/bindings/connector/usb-connector.yaml
> +++ b/Documentation/devicetree/bindings/connector/usb-connector.yaml
> @@ -176,6 +176,9 @@ properties:
>        port number as described below.
> 
>      properties:
> +      port:
> +        $ref: /schemas/graph.yaml#/properties/port
> +
>        port@0:
>          $ref: /schemas/graph.yaml#/properties/port
>          description: High Speed (HS), present in all connectors.
> @@ -189,8 +192,11 @@ properties:
>          description: Sideband Use (SBU), present in USB-C. This
> describes the
>            alternate mode connection of which SBU is a part.
> 
> -    required:
> -      - port@0
> +    oneOf:
> +      - required:
> +          - port
> +      - required:
> +          - port@0
> 
> 
> Do you agree on this approach ? (I can add a pre-cursor patch to this
> series, to handle the single port case)



Best regards,
Krzysztof