linux-kernel - Re: [PATCH 1/1] ARM: add PROC_DEVICETREE support in Kconfig

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Message-ID: <CAOesGMjmeXVx2MR7GGux9Cztkf-C3cBqpBW1_PW75D_Gk0GHiA@mail.gmail.com>
Date:	Fri, 6 Jul 2012 16:24:32 -0700
From:	Olof Johansson <olof@...om.net>
To:	Xiao Jiang <jgq516@...il.com>
Cc:	Rob Herring <robherring2@...il.com>, linux@....linux.org.uk,
	tony@...mide.com, plagnioj@...osoft.com, nicolas.ferre@...el.com,
	arnd@...db.de, swarren@...dia.com, ldewangan@...dia.com,
	hdoyu@...dia.com, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/1] ARM: add PROC_DEVICETREE support in Kconfig

On Fri, Jul 6, 2012 at 4:15 PM, Xiao Jiang <jgq516@...il.com> wrote:
> 2012/7/6 Rob Herring <robherring2@...il.com>
>>
>> On 07/06/2012 05:38 AM, jgq516@...il.com wrote:
>> > From: Xiao Jiang <jgq516@...il.com>
>> >
>> > Since more and more arm chips support device tree, it'd be better add
>> > PROC_DEVICETREE
>> > in arch/arm/Kconfig to avoid duplicate code.
>>
>> I think this should remain user choice. If its going to be selected,
>> then you might as well just remove the option altogether. Perhaps just
>> make the option default to yes.
>>
> Hmm, sounds reasonable from your point. So the better choice is to set the
> option default to Y if the board has dt support just like tegra_defconfig
> and at91_dt_defconfig,  right? thanks.

Why bother? If the defconfigs select it then most users basing their
config from that will be just fine.

PROC_DEVICETREE is 100% optional, it's useful to get runtime access to
the contents of the device tree but it's not required for the kernel
to boot.


-Olof
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