Re: dtbs_check issue

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Hi Rob,

On Fri, Jul 22, 2022 at 5:39 PM Rob Herring <robh+dt@xxxxxxxxxx> wrote:
>
> On Fri, Jul 22, 2022 at 7:29 AM Lad, Prabhakar
> <prabhakar.csengg@xxxxxxxxx> wrote:
> >
> > On Fri, Jul 22, 2022 at 12:08 PM Lad, Prabhakar
> > <prabhakar.csengg@xxxxxxxxx> wrote:
> > >
> > > On Thu, Jul 21, 2022 at 11:24 PM Rob Herring <robh+dt@xxxxxxxxxx> wrote:
> > > >
> > > > On Thu, Jul 21, 2022 at 4:18 PM Lad, Prabhakar
> > > > <prabhakar.csengg@xxxxxxxxx> wrote:
> > > > >
> > > > > Hi Rob,
> > > > >
> > > > > On Thu, Jul 21, 2022 at 5:57 PM Rob Herring <robh+dt@xxxxxxxxxx> wrote:
> > > > > >
> > > > > > On Thu, Jul 21, 2022 at 9:23 AM Lad, Prabhakar
> > > > > > <prabhakar.csengg@xxxxxxxxx> wrote:
> > > > > > >
> > > > > > > Hi Krzysztof,
> > > > > > >
> > > > > > > On Thu, Jul 21, 2022 at 4:12 PM Krzysztof Kozlowski
> > > > > > > <krzysztof.kozlowski@xxxxxxxxxx> wrote:
> > > > > > > >
> > > > > > > > On 21/07/2022 17:07, Lad, Prabhakar wrote:
> > > > > > > > > Fyi keeping even a single SMARC board in arm renesas.yaml schema I see
> > > > > > > > > dtbs_check failures.
> > > > > > > > >
> > > > > > > > > Any pointers on how I can get around this issue?
> > > > > > > >
> > > > > > > > Few months ago:
> > > > > > > > https://lore.kernel.org/linux-devicetree/cf7728fd-b5c8-cd3d-6074-d27f38f86545@xxxxxxxxxx/
> > > > > > > >
> > > > > > > Thanks for the link.
> > > > > > >
> > > > > > > > Although Rob admitted in the thread this is in general allowed
> > > > > > > > configuration, to me it is still confusing - the left-most compatible is
> > > > > > > > not the most specific. Non obvious, confusing and it seems dtschema does
> > > > > > > > not support it?
> > > > > > > >
> > > > > > > It looks like dtschema does not support it.
> > > > > >
> > > > > > The issue is the same as licensed IP where we have a generic
> > > > > > compatible and per licensee compatibles in separate schemas. The
> > > > > > solution anytime a compatible exists in more than 1 schema is a custom
> > > > > > 'select' which excludes that compatible. That would be messy here
> > > > > > though due to the large number of compatibles. Perhaps we could
> > > > > > instead merge a custom select with the default generated one. Then the
> > > > > > schema would just need:
> > > > > >
> > > > > > select:
> > > > > >   not:
> > > > > >     properties:
> > > > > >       contains:
> > > > > >         const: renesas,smarc-evk
> > > > > >
> > Being a novice here with the select, I added the below to ignore the
> > arm schema if its the RISC-V board:
> >
> > diff --git a/Documentation/devicetree/bindings/arm/renesas.yaml
> > b/Documentation/devicetree/bindings/arm/renesas.yaml
> > index ff80152f092f..77e78136bfce 100644
> > --- a/Documentation/devicetree/bindings/arm/renesas.yaml
> > +++ b/Documentation/devicetree/bindings/arm/renesas.yaml
> > @@ -9,6 +9,16 @@ title: Renesas SH-Mobile, R-Mobile, and R-Car
> > Platform Device Tree Bindings
> >  maintainers:
> >    - Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> >
> > +# We want ignore this schema if the board is of RISC-V arch
> > +select:
> > +  not:
> > +    properties:
> > +      compatible:
> > +        contains:
> > +          const: renesas,r9a07g043f1
> > +    required:
> > +      - compatible
> > +
> >  properties:
> >    $nodename:
> >      const: '/'
> >
> > But when I run the dt_binding_check, I get the below issues:
>
> That would only work if we change how 'select' is generated. As I
> said, the above would have to be merged with what we normally generate
> (see processed-schema.json for what that looks like).
>
I'm a bit lost here!

Could you please elaborate what you mean by merging a custom select
with the default generated one. When I compared the
processed-schema.json with/without my changes they were the same.

Cheers,
Prabhakar



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