linux-kernel - Re: [PATCH v5] dtb: Create a common home for cross-architecture dtsi files.

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Date:	Mon, 03 Aug 2015 09:47:42 -0700
From:	Frank Rowand <frowand.list@...il.com>
To:	Ian Campbell <ian.campbell@...rix.com>
CC:	linux-kernel@...r.kernel.org, Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Russell King <linux@....linux.org.uk>,
	Pawel Moll <pawel.moll@....com>, linux-kbuild@...r.kernel.org,
	Catalin Marinas <catalin.marinas@....com>,
	Sudeep Holla <sudeep.holla@....com>,
	Liviu Dudau <liviu.dudau@....com>,
	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@...ts.infradead.org
Subject: Re: [PATCH v5] dtb: Create a common home for cross-architecture dtsi
 files.

On 8/3/2015 9:06 AM, 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.
> 
> Rather than using ../../ tricks to pickup .dtsi files from another
> arch this patch creates a new directory kernel/dts as a home for such
> cross-arch .dtsi files and arranges for it to be in the include path
> for both dtc and cpp. The dtsi file itself is moved into a vendor
> subdir in this case "arm" (the vendor, not the ARCH=).
> 
> [0] https://git.kernel.org/cgit/linux/kernel/git/devicetree/devicetree-rebasing.git/
> 
> Signed-off-by: Ian Campbell <ian.campbell@...rix.com>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Pawel Moll <pawel.moll@....com>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Kumar Gala <galak@...eaurora.org>
> Cc: Liviu Dudau <liviu.dudau@....com>
> Cc: Sudeep Holla <sudeep.holla@....com>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
> Cc: Russell King <linux@....linux.org.uk>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will.deacon@....com>
> Cc: Kristina Martsenko <kristina.martsenko@....com>
> Cc: Kevin Hilman <khilman@...aro.org>
> Cc: devicetree@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kbuild@...r.kernel.org
> Acked-by: Mark Rutland <mark.rutland@....com>
> Acked-by: Rob Herring <robh@...nel.org>
> Acked-by: Liviu Dudau <Liviu.Dudau@....com>
> Reviewed-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---
> v2: Move to include/dt-dtsi and introduce a per-vendor subdirectory.
> 
> v3: Move to kernel/dts.
>     Include new directory in DTC include path as well as cpp path, and
>     therefore switch back to /include/.
>     Update MAINTAINERS
> 
> v4: Change path in changelog too.
>     Add ()s to title of 9ccd608070b6.
> 
> v5: Remove stale reference to switching from /include/ to #include.
> ---
>  Documentation/devicetree/bindings/arm/vexpress.txt          | 2 +-
>  MAINTAINERS                                                 | 1 +
>  arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts                 | 2 +-
>  arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts                  | 2 +-
>  arch/arm/boot/dts/vexpress-v2p-ca5s.dts                     | 2 +-
>  arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts        | 2 +-
>  {arch/arm/boot/dts => kernel/dts/arm}/vexpress-v2m-rs1.dtsi | 0
>  scripts/Makefile.lib                                        | 3 ++-
>  8 files changed, 8 insertions(+), 6 deletions(-)
>  rename {arch/arm/boot/dts => kernel/dts/arm}/vexpress-v2m-rs1.dtsi (100%)

Reviewed-by: Frank Rowand <frank.rowand@...ymobile.com>

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