Re: [PATCH v1 2/3] dt-bindings: riscv: convert plic bindings to json-schema

[Rob Herring]

On Mon, Mar 22, 2021 at 9:38 AM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
>
> Hi Sagar, Rob,
>
> (replying to an old email, as this one seems to be the most appropriate)
>
> On Tue, Sep 22, 2020 at 10:34 PM Rob Herring <robh@xxxxxxxxxx> wrote:
> > On Thu, Sep 10, 2020 at 04:14:03PM +0530, Sagar Kadam wrote:
> > > Convert device tree bindings for SiFive's PLIC to YAML format
> > >
> > > Signed-off-by: Sagar Kadam <sagar.kadam@xxxxxxxxxx>
>
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
>
> > > +
> > > +  '#address-cells':
> > > +    const: 0
> > > +    description: Should be <0> or more.
> >
> > Drop. 'or more' is wrong. If there's a case with more, it will need to
> > be documented.
>
> Why do we have the "'#address-cells': const: 0" at all...
>
> > > +required:
> > > +  - compatible
> > > +  - '#address-cells'
>
> ... and why is it required?

It is only required if an 'interrupt-map' points to this node.
Currently dtc is warning if it is missing always, but there are plans
to relax dtc to only warn when 'interrupt-map' is present. Of course,
if you had 'interrupt-map' in an overlay, you'd want #address-cells in
the base dt and there's no other way to check that than making it
required.

Rob