linux-kernel - Re: [PATCH net-next v2 4/6] dt-bindings: net: renesas,rzn1-gmac: Document RZ/N1 GMAC support

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Date:   Wed, 8 Feb 2023 20:51:00 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Clément Léger <clement.leger@...tlin.com>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Wong Vee Khee <veekhee@...le.com>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Revanth Kumar Uppala <ruppala@...dia.com>,
        Tan Tee Min <tee.min.tan@...ux.intel.com>
Cc:     Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Herve Codina <herve.codina@...tlin.com>,
        Miquèl Raynal <miquel.raynal@...tlin.com>,
        Milan Stevanovic <milan.stevanovic@...com>,
        Jimmy Lalande <jimmy.lalande@...com>,
        Pascal Eberhard <pascal.eberhard@...com>,
        Mohammad Athari Bin Ismail <mohammad.athari.ismail@...el.com>,
        Jon Hunter <jonathanh@...dia.com>, netdev@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next v2 4/6] dt-bindings: net: renesas,rzn1-gmac:
 Document RZ/N1 GMAC support

On 08/02/2023 17:42, Clément Léger wrote:
> Add "renesas,rzn1-gmac" binding documentation which is compatible with
> "snps,dwmac" compatible driver but uses a custom PCS to communicate
> with the phy.
> 
> Signed-off-by: Clément Léger <clement.leger@...tlin.com>
> ---
>  .../bindings/net/renesas,rzn1-gmac.yaml       | 67 +++++++++++++++++++
>  1 file changed, 67 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
> 
> diff --git a/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml b/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
> new file mode 100644
> index 000000000000..944fd0d97d79
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/renesas,rzn1-gmac.yaml
> @@ -0,0 +1,67 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/net/renesas,rzn1-gmac.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas GMAC
> +
> +maintainers:
> +  - Clément Léger <clement.leger@...tlin.com>
> +
> +select:
> +  properties:
> +    compatible:
> +      contains:
> +        enum:
> +          - renesas,r9a06g032-gmac
> +          - renesas,rzn1-gmac
> +  required:
> +    - compatible
> +
> +allOf:
> +  - $ref: snps,dwmac.yaml#
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - renesas,r9a06g032-gmac
> +          - renesas,rzn1-gmac
> +          - snps,dwmac

This is still not correct and does not make any sense.

What do you want to say here with such binding? That you describe
"snps,dwmac" here? Then it's duplicated with snps,dwmac.yaml... Drop
that enum and make it a proper list.

Best regards,
Krzysztof