[PATCH v4] kbuild: Add support for DT binding schema checks

[Rob Herring]

On Wed, Jan 23, 2019 at 9:33 AM Geert Uytterhoeven <geert at linux-m68k.org> wrote:
>
> Hi Rob,
>
> On Tue, Dec 11, 2018 at 9:24 PM Rob Herring <robh at kernel.org> wrote:
> > This adds the build infrastructure for checking DT binding schema
> > documents and validating dts files using the binding schema.
> >
> > Check DT binding schema documents:
> > make dt_binding_check
> >
> > Build dts files and check using DT binding schema:
> > make dtbs_check
> >
> > Optionally, DT_SCHEMA_FILES can be passed in with a schema file(s) to
> > use for validation. This makes it easier to find and fix errors
> > generated by a specific schema.
> >
> > Currently, the validation targets are separate from a normal build to
> > avoid a hard dependency on the external DT schema project and because
> > there are lots of warnings generated.
>
> Thanks, I'm giving this a try, and get errors like:
>
>       DTC     arch/arm/boot/dts/emev2-kzm9d.dt.yaml
>     FATAL ERROR: No markers present in property 'cpu0' value
>
> and
>
>       DTC     arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dt.yaml
>     FATAL ERROR: No markers present in property 'audio_clk_a' value
>
> Do you have a clue?

That's really strange because those aren't even properties. Are other
dts files okay? This is the in tree dtc?

The only time you should be missing markers is if you did a dts -> dts
-> dt.yaml.

Rob