Re: [RFC PATCH] dt-bindings: add a jsonschema binding example

[Grant Likely]

On 21/04/2018 00:41, Stephen Boyd wrote:
> Quoting Rob Herring (2018-04-20 11:15:04)
> > On Fri, Apr 20, 2018 at 11:47 AM, Stephen Boyd <sboyd@xxxxxxxxxx> wrote:
> > > Quoting Rob Herring (2018-04-18 15:29:05)
> > > > diff --git a/Documentation/devicetree/bindings/example-schema.yaml b/Documentation/devicetree/bindings/example-schema.yaml
> > > > new file mode 100644
> > > > index 000000000000..fe0a3bd1668e
> > > > --- /dev/null
> > > > +++ b/Documentation/devicetree/bindings/example-schema.yaml
[...]
> > > > +  interrupts:
> > > > +    # Either 1 or 2 interrupts can be present
> > > > +    minItems: 1
> > > > +    maxItems: 2
> > > > +    items:
> > > > +      - description: tx or combined interrupt
> > > > +      - description: rx interrupt
> > > > +
> > > > +    description: |
> > >
> > > The '|' is needed to make yaml happy?
> >
> > Yes, this is simply how you do literal text blocks in yaml.
> >
> > We don't really need for this one really, but for the top-level
> > 'description' we do. The long term intent is 'description' would be
> > written in sphinx/rst and can be extracted into the DT spec (for
> > common bindings). Grant has experimented with that some.
>
> Ok. That sounds cool. Then we could embed links to datasheets and SVGs
> too.

I'd like it if we can define the description text blocks to be
reStructeredText markup. That makes it even easier to integrate with the
specification documentation.

[...]
> > > > +  # Property names starting with '#' must be quoted
> > > > +  '#interrupt-cells':
> > > > +    # A simple case where the value must always be '2'.
> > > > +    # The core schema handles that this must be a single integer.
> > > > +    const: 2
> > > > +
> > > > +  interrupt-controller: {}
> > >
> > > Does '{}' mean nothing to see here?
> >
> > Yes. It's just an empty schema that's always valid.

IIRC, in the current jsonschema draft-6 spec, the following also has the
same behaviour, which I like slightly better:
    interrupt-controller: true

g.
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