linux-kernel - Re: [PATCH] kbuild: Add DTB_FILES variable for dtbs

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Message-ID: <20221102171343.3ajwlkxhp7s7r36k@notapiano>
Date:   Wed, 2 Nov 2022 13:13:43 -0400
From:   Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
To:     Rob Herring <robh@...nel.org>
Cc:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, kernel@...labora.com,
        Masahiro Yamada <masahiroy@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kbuild@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH] kbuild: Add DTB_FILES variable for dtbs_check

On Tue, Nov 01, 2022 at 06:03:03PM -0400, Nícolas F. R. A. Prado wrote:
> Currently running dtbs_check compiles and runs the DT checker on all
> enabled devicetrees against all dt-bindings. This can take a long time,
> and is an unnecessary burden when just validating a new devicetree or
> changes in an existing one, with the dt-bindings unchanged.
> 
> Similarly to DT_SCHEMA_FILES for dt_binding_check, add a DTB_FILES
> variable that can be passed to the dtbs_check make command to restrict
> which devicetrees are validated.
> 
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
> 
> ---
> Usage example:
> make dtbs_check DTB_FILES='arch/arm64/boot/dts/mediatek/mt8192-asurada-spherion-r0.dtb arch/arm64/boot/dts/mediatek/mt8192-asurada-hayato-r1.dtb'

Hi,

I have just learned that it is already possible to achieve the same thing by
passing the dtbs explicitly to make and enabling the DTBS_CHECK flag like so:

make CHECK_DTBS=y mediatek/mt8192-asurada-spherion-r0.dtb

This flag isn't documented anywhere outside the Makefile however. So I'll send a
patch documenting it shortly, and this commit can be ignored.

Thanks,
Nícolas