linux-kernel - Re: [PATCH 2/3] dt-bindings: net: sun8i-emac: Fix snps,dwmac.yaml inheritance

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Message-ID: <20221126142735.47dcca6d@slackpad.lan>
Date:   Sat, 26 Nov 2022 14:28:23 +0000
From:   Andre Przywara <andre.przywara@....com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Samuel Holland <samuel@...lland.org>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        "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>,
        LABBE Corentin <clabbe.montjoie@...il.com>,
        Maxime Ripard <mripard@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev, netdev@...r.kernel.org
Subject: Re: [PATCH 2/3] dt-bindings: net: sun8i-emac: Fix snps,dwmac.yaml
 inheritance

On Sat, 26 Nov 2022 14:26:25 +0100
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org> wrote:

Hi,

> On 25/11/2022 21:20, Samuel Holland wrote:
> > The sun8i-emac binding extends snps,dwmac.yaml, and should accept all
> > properties defined there, including "mdio", "resets", and "reset-names".
> > However, validation currently fails for these properties because the  
> 
> validation does not fail:
> make dt_binding_check -> no problems
> 
> Maybe you meant that DTS do not pass dtbs_check?

Yes, that's what he meant: If a board actually doesn't have Ethernet
configured, dt-validate complains. I saw this before, but didn't find
any solution.
An example is: $ dt-validate ... sun50i-a64-pinephone-1.2.dtb
arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone-1.2.dtb:
  ethernet@...0000: Unevaluated properties are not allowed ('resets', 'reset-names', 'mdio' were unexpected)
  From schema: Documentation/devicetree/bindings/net/allwinner,sun8i-a83t-emac.yaml

Why exactly is beyond me, but this patch removes this message.

Cheers,
Andre


> > local binding sets "unevaluatedProperties: false", and snps,dwmac.yaml
> > is only included inside an allOf block. Fix this by referencing
> > snps,dwmac.yaml at the top level.  
> 
> There is nothing being fixed here...
> 
> > 
> > Signed-off-by: Samuel Holland <samuel@...lland.org>
> > ---
> > 
> >  .../devicetree/bindings/net/allwinner,sun8i-a83t-emac.yaml     | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/allwinner,sun8i-a83t-emac.yaml b/Documentation/devicetree/bindings/net/allwinner,sun8i-a83t-emac.yaml
> > index 1432fda3b603..34a47922296d 100644
> > --- a/Documentation/devicetree/bindings/net/allwinner,sun8i-a83t-emac.yaml
> > +++ b/Documentation/devicetree/bindings/net/allwinner,sun8i-a83t-emac.yaml
> > @@ -10,6 +10,8 @@ maintainers:
> >    - Chen-Yu Tsai <wens@...e.org>
> >    - Maxime Ripard <mripard@...nel.org>
> >  
> > +$ref: "snps,dwmac.yaml#"
> > +
> >  properties:
> >    compatible:
> >      oneOf:
> > @@ -60,7 +62,6 @@ required:
> >    - syscon
> >  
> >  allOf:
> > -  - $ref: "snps,dwmac.yaml#"
> >    - if:
> >        properties:
> >          compatible:  
> 
> Best regards,
> Krzysztof
> 
>