linux-kernel - Re: [PATCH v3] dtb: Create a common home for cross-architecture dtsi files.

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Message-ID: <CAK7LNATj96OKFDTgyPC8Uu0qt=4NQ7ZVeLKEEP3K7-smFP2SCw@mail.gmail.com>
Date:	Sat, 1 Aug 2015 15:21:15 +0900
From:	Masahiro Yamada <yamada.masahiro@...ionext.com>
To:	Ian Campbell <ian.campbell@...rix.com>
Cc:	devicetree@...r.kernel.org, Mark Rutland <mark.rutland@....com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Russell King <linux@....linux.org.uk>,
	Pawel Moll <pawel.moll@....com>,
	Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Sudeep Holla <sudeep.holla@....com>,
	Liviu Dudau <liviu.dudau@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Will Deacon <will.deacon@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Kristina Martsenko <kristina.martsenko@....com>,
	Kumar Gala <galak@...eaurora.org>,
	Kevin Hilman <khilman@...aro.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3] dtb: Create a common home for cross-architecture dtsi files.

2015-07-31 23:31 GMT+09:00 Ian Campbell <ian.campbell@...rix.com>:
> Commit 9ccd608070b6 "arm64: dts: add device tree for ARM SMM-A53x2 on
> LogicTile Express 20MG" added a new dts file to arch/arm64 which
> included "../../../../arm/boot/dts/vexpress-v2m-rs1.dtsi", i.e. a
> .dtsi supplied by arch/arm.
>
> Unfortunately this causes some issues for the split device tree
> repository[0], since things get moved around there. In that context
> the new .dts ends up at src/arm64/arm/vexpress-v2f-1xv7-ca53x2.dts
> while the include is at src/arm/vexpress-v2m-rs1.dtsi.

Typo?

src/arm64  ->  arch/arm64
src/arm    ->  arch/arm



> The sharing of the .dtsi is legitimate since the baseboard is the same
> for various vexpress systems whatever processor they use.
>
> Rather than using ../../ tricks to pickup .dtsi files from another
> arch this patch creates a new directory include/dt-dtsi as a
> home for such cross-arch .dtsi files, arranges for it to be in the
> include path when the .dts files are processed by cpp and switches the
> .dts files to use cpp #include instead of /include/. The dtsi file
> itself is moved into a vendor subdir in this case "arm" (the vendor,
> not the ARCH=).

As Rob pointed out, this does not match the code.


> [0] https://git.kernel.org/cgit/linux/kernel/git/devicetree/devicetree-rebasing.git/




Nit just in case.

scripts/checkpatch.pl reported 1 error, 1 warning:


ERROR: Please use git commit description style 'commit <12+ chars of
sha1> ("<title line>")' - ie: 'Commit 9ccd608070b6 ("arm64: dts: add
device tree for ARM SMM-A53x2 on LogicTile Express 20MG")'
#23:
Commit 9ccd608070b6 "arm64: dts: add device tree for ARM SMM-A53x2 on

WARNING: Possible unwrapped commit description (prefer a maximum 75
chars per line)
#44:
[0] https://git.kernel.org/cgit/linux/kernel/git/devicetree/devicetree-rebasing.git/

total: 1 errors, 1 warnings, 58 lines checked



The URL should not be split into two lines, so I think the warning can
be ignored.
But I think it is better to fix the error of commit description style.


Apart from the git-description,

Reviewed-by: Masahiro Yamada <yamada.masahiro@...ionext.com>


-- 
Best Regards
Masahiro Yamada
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