linux-kernel - Re: [PATCH 2/5] arm64: Juno: Split juno.dts into juno-base.dtsi and juno.dts.

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Message-ID: <1431596142.2881.13.camel@linaro.org>
Date:	Thu, 14 May 2015 10:35:42 +0100
From:	"Jon Medhurst (Tixy)" <tixy@...aro.org>
To:	Liviu Dudau <Liviu.Dudau@....com>
Cc:	Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Marc Zyngier <marc.zyngier@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Sudeep Holla <sudeep.holla@....com>,
	devicetree <devicetree@...r.kernel.org>,
	LAKML <linux-arm-kernel@...ts.infradead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/5] arm64: Juno: Split juno.dts into juno-base.dtsi and
 juno.dts.

On Wed, 2015-05-13 at 18:11 +0100, Liviu Dudau wrote:
> Prepare the device tree for adding more boards based on Juno r0.
> 
> Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>
> ---
>  arch/arm64/boot/dts/arm/juno-base.dtsi | 125 +++++++++++++++++++++++++++++++++
>  arch/arm64/boot/dts/arm/juno.dts       | 122 +-------------------------------


What criteria were used to select the contents of juno-base.dtsi?
>From what I can see, the stuff left out of base is still the same for r0
and r1 (cpu, pmu, memory, psci!). And so juno-r1.dts could just be

-------------------------------------------------------------------------
#include "juno.dts"

/ {
	model = "ARM Juno development board (r1)";

};

&memtimer {
	status = "okay";
};
-------------------------------------------------------------------------

Yes, it's a bit hacky, but avoids duplication of source code.

I can only assume there are come non-public differences between r0 and
r1?

-- 
Tixy

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