Re: [PATCH] dt-bindings: can: renesas,rcar-canfd: Fix number of channels for R-Car V3U

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Hi Krzysztof,

On Fri, Dec 2, 2022 at 10:01 AM Krzysztof Kozlowski
<krzysztof.kozlowski@xxxxxxxxxx> wrote:
> On 02/12/2022 09:22, Geert Uytterhoeven wrote:
> > According to the bindings, only two channels are supported.
> > However, R-Car V3U supports eight, leading to "make dtbs" failures:
> >
> >         arch/arm64/boot/dts/renesas/r8a779a0-falcon.dtb: can@e6660000: Unevaluated properties are not allowed ('channel2', 'channel3', 'channel4', 'channel5', 'channel6', 'channel7' were unexpected)
> >
> > Update the number of channels to 8 on R-Car V3U.
> > While at it, prevent adding more properties to the channel nodes, as
> > they must contain no other properties than a status property.
> >
> > Fixes: d6254d52d70de530 ("dt-bindings: can: renesas,rcar-canfd: Document r8a779a0 support")
> > Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

> > --- a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
> > +++ b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml

> >      description: Maximum frequency of the CANFD clock.
> >
> >  patternProperties:
> > -  "^channel[01]$":
> > +  "^channel[0-7]$":
> >      type: object
> >      description:
> > -      The controller supports two channels and each is represented as a child
> > -      node.  Each child node supports the "status" property only, which
> > +      The controller supports multiple channels and each is represented as a
> > +      child node.  Each child node supports the "status" property only, which
> >        is used to enable/disable the respective channel.
> >
> > +    unevaluatedProperties: false
>
> There are no other properties within a channel, so this should be rather
> additionalProperties: false.

Are you sure? Then I also have to add:

        properties:
          status: true

Thanks!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds



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