linux-kernel - Re: [PATCH v6 2/3] ARM: dts: Add i2c-arbitrator bus for exynos5250-snow

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Message-ID: <20130416163526.GB4918@quad.lixom.net>
Date:	Tue, 16 Apr 2013 09:35:26 -0700
From:	Olof Johansson <olof@...om.net>
To:	Doug Anderson <dianders@...omium.org>
Cc:	Wolfram Sang <wsa@...-dreams.de>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Simon Glass <sjg@...omium.org>,
	Naveen Krishna Chatradhi <ch.naveen@...sung.com>,
	grant.likely@...retlab.ca, yuvaraj.cd@...il.com,
	ben.dooks@...ethink.co.uk, u.kleine-koenig@...gutronix.de,
	broonie@...nsource.wolfsonmicro.com,
	girish.shivananjappa@...aro.org, bhushan.r@...sung.com,
	sreekumar.c@...sung.com, prashanth.g@...sung.com,
	djkurtz@...omium.org, swarren@...dotorg.org, linux@...ck-us.net,
	Russell King <linux@....linux.org.uk>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	Rahul Sharma <rahul.sharma@...sung.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Jingoo Han <jg1.han@...sung.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 2/3] ARM: dts: Add i2c-arbitrator bus for
 exynos5250-snow

On Tue, Apr 16, 2013 at 09:29:01AM -0700, Doug Anderson wrote:
> We need to use the i2c-arbitrator to talk to any of the devices on i2c
> bus 4 on exynos5250-snow so that we don't confuse the embedded
> controller (EC).  Add the i2c-arbitrator to the device tree.  As we
> add future devices (keyboard, sbs, tps65090) we'll add them on top of
> this.
> 
> The arbitrated bus is numbered 104 simply as a convenience to make it
> easier for people poking around to guess that it might have something
> to do with the physical bus 4.
> 
> The addition is split between the cros5250-common and the snow device
> tree file since not all cros5250-class devices use arbitration.
> 
> Signed-off-by: Doug Anderson <dianders@...omium.org>

Acked-by: Olof Johansson <olof@...om.net>


-Olof
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