linux-kernel - Re: [PATCH 1/1] dt-bindings: Fix error in 'make dtbs_check' when using DT_SCHEMA

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Date:   Tue, 8 Dec 2020 00:41:37 +0200
From:   Cristian Ciocaltea <cristian.ciocaltea@...il.com>
To:     Rob Herring <robh@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] dt-bindings: Fix error in 'make dtbs_check' when
 using DT_SCHEMA_FILES

On Mon, Dec 07, 2020 at 03:48:31PM -0600, Rob Herring wrote:
> On Wed, Nov 18, 2020 at 05:20:50PM +0200, Cristian Ciocaltea wrote:
> > If DT_SCHEMA_FILES is specified and contains more than one file paths,
> 
> If that worked before, it was by chance. :) Yes, it's called '_FILES', 
> but more than one was on my todo list.

I've been using it for a while, but I didn't know this was not
officially supported..

> Anyways, I'll apply it.

Great, thanks!

> > 'make dtbs_check' fails with the following message:
> > 
> >   $ make dtbs_check DT_SCHEMA_FILES="path/to/schema1.yaml path/to/schema2.yaml"
> >   SCHEMA  Documentation/devicetree/bindings/processed-schema.json
> >   Documentation/devicetree/bindings/Makefile:77: recipe for target 'Documentation/devicetree/bindings/processed-schema.json' failed
> >   make[1]: *** [Documentation/devicetree/bindings/processed-schema.json] Error 255
> >   make[1]: *** Deleting file 'Documentation/devicetree/bindings/processed-schema.json'
> >   Makefile:1364: recipe for target 'dt_binding_check' failed
> >   make: *** [dt_binding_check] Error 2
> > 
> > The error code 255 is returned by 'dt-mk-schema' when invoked as
> > 'dt-mk-schema -j -u @<tmp-file>', where '<tmp-file>' is a temporary
> > file that is generated to contain a list of SPACE delimited schema
> > file paths, as indicated via DT_SCHEMA_FILES.
> > 
> > However, it seems the file format has been recently changed in
> > 'dt-mk-schema', which now expects each schema path to be provided on
> > a separate line:
> > 
> >  $ dt-mk-schema --version
> >  2020.12.dev4+g6de1c45
> > 
> > Therefore, let's change '<tmp-file>' content format from
> > 
> >  path/to/schema1.yaml path/to/schema2.yaml ... path/to/schemaN.yaml
> > 
> > to
> > 
> >  path/to/schema1.yaml
> >  path/to/schema2.yaml
> >  ...
> >  path/to/schemaN.yaml
> > 
> > Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...il.com>
> > ---
> >  Documentation/devicetree/bindings/Makefile | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile
> > index f50420099a55..643eb873fd51 100644
> > --- a/Documentation/devicetree/bindings/Makefile
> > +++ b/Documentation/devicetree/bindings/Makefile
> > @@ -37,7 +37,7 @@ quiet_cmd_chk_bindings = CHKDT   $@
> >  quiet_cmd_mk_schema = SCHEMA  $@
> >        cmd_mk_schema = f=$$(mktemp) ; \
> >                        $(if $(DT_MK_SCHEMA_FLAGS), \
> > -                           echo $(real-prereqs), \
> > +                           printf '%s\n' $(real-prereqs), \
> >                             $(find_cmd)) > $$f ; \
> >                        $(DT_MK_SCHEMA) -j $(DT_MK_SCHEMA_FLAGS) @$$f > $@ ; \
> >  		      rm -f $$f
> > -- 
> > 2.29.2
> >