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SubjectRe: [PATCH v4] kbuild: Add support for DT binding schema checks
Hi Rob,

On Mon, Jan 28, 2019 at 4:35 PM Rob Herring <robh@kernel.org> wrote:
> On Mon, Jan 28, 2019 at 3:43 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > On Tue, Dec 11, 2018 at 9:24 PM Rob Herring <robh@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.

> > BTW, what are the CONFIG dependencies for this to work?
> > E.g. defconfig on x86_64 fails, even after enabling CONFIG_OF:
>
> I generally use allmodconfig which enables building all DTs.
>
> Yes, there's a dependency on CONFIG_DTC which isn't always enabled
> with CONFIG_OF. Maybe it should be. The only other solutions I've

Oh, didn't think of CONFIG_DTC.

> thought of are either always build dtc or make the targets conditional
> on CONFIG_DTC. The latter would only change the error message.

Making the target conditional may make it more obvious to the user
what's going on. Cfr. "make modules_install" giving a nice explanation
when CONFIG_MODULES=n.

Thanks.

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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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