linux-kernel - Re: [PATCH] kbuild: Allow DTB overlays to built from .dtso named source files

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Date:   Thu, 20 Oct 2022 17:47:34 -0500
From:   Rob Herring <robh+dt@...nel.org>
To:     Andrew Davis <afd@...com>,
        Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        devicetree@...r.kernel.org, linux-kbuild@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kbuild: Allow DTB overlays to built from .dtso named
 source files

On Fri, Oct 14, 2022 at 10:13 AM Andrew Davis <afd@...com> wrote:
>
> Currently DTB Overlays (.dtbo) are build from source files with the same
> extension (.dts) as the base DTs (.dtb). This may become confusing and
> even lead to wrong results. For example, a composite DTB (created from a
> base DTB and a set of overlays) might have the same name as one of the
> overlays that create it.
>
> Different files should be generated from differently named sources.
>  .dtb  <-> .dts
>  .dtbo <-> .dtso
>
> We do not remove the ability to compile DTBO files from .dts files here,
> only add a new rule allowing the .dtso file name. The current .dts named
> overlays can be renamed with time. After all have been renamed we can
> remove the other rule.

There was a patch from Geert converting everything. I'd rather not
support both ways.

Rob