linux-kernel - Re: [PATCH] ARM64: dts: vexpress: Use a symlink to vexpress-v2m-rs1.dtsi from arch=arm

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Date:	Wed, 14 Oct 2015 17:56:27 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ian.campbell@...rix.com>,
	devicetree@...r.kernel.org,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Russell King <linux@....linux.org.uk>, arm@...nel.org,
	Pawel Moll <pawel.moll@....com>, linux-kbuild@...r.kernel.org,
	Catalin Marinas <catalin.marinas@....com>,
	Kumar Gala <galak@...eaurora.org>,
	Liviu Dudau <liviu.dudau@....com>,
	linux-kernel@...r.kernel.org, Will Deacon <will.deacon@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Kristina Martsenko <kristina.martsenko@....com>,
	Frank Rowand <frank.rowand@...ymobile.com>,
	Sudeep Holla <sudeep.holla@....com>,
	Olof Johansson <olof@...om.net>,
	Kevin Hilman <khilman@...aro.org>
Subject: Re: [PATCH] ARM64: dts: vexpress: Use a symlink to vexpress-v2m-rs1.dtsi from arch=arm

On Monday 12 October 2015 16:37:50 Mark Rutland wrote:
> On Mon, Oct 05, 2015 at 12:53:52PM +0100, Ian Campbell wrote:
> > 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.
> > 
> > The sharing of the .dtsi is legitimate since the baseboard is the same
> > for various vexpress systems whatever processor they use.
> > 
> > Previously I attempted to resolve this by creating a shared location
> > for such things but we have been unable to come to a consensus on
> > where that should be.
> > 
> > Instead this patch simply replaces the use of ../../ in the dts
> > /include/ with a symlink in arch/arm64/boot/dts/arm pointing to the
> > file arch/arm/boot/dts.
> > 
> > Since the split device tree repo will shortly be required to flatten
> > symlinks for other reasons this will cause the dtsi file to appear in
> > both src/arm and src/arm64 in the split repo, which is an improvement
> > on not building for arm64 now.
> > 
> > [0] https://git.kernel.org/cgit/linux/kernel/git/devicetree/devicetree-rebasing.git/
> > 
> > Signed-off-by: Ian Campbell <ian.campbell@...rix.com>


> Acked-by: Mark Rutland <mark.rutland@....com>
> 

Applied to next/dt, thanks!

	Arnd
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