linux-kernel - Re: [PATCH 2/2] i2c-s3c2410: Add bus arbitration implementation

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Date:	Thu, 29 Nov 2012 18:13:01 -0800
From:	Simon Glass <sjg@...omium.org>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Naveen Krishna Chatradhi <ch.naveen@...sung.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-i2c@...r.kernel.org,
	grundler@...omium.org, naveen@...omium.org, w.sang@...gutronix.de,
	linux-kernel@...r.kernel.org, Olof Johansson <olof@...om.net>
Subject: Re: [PATCH 2/2] i2c-s3c2410: Add bus arbitration implementation

+Olof

On Thu, Nov 29, 2012 at 8:34 AM, Mark Brown
<broonie@...nsource.wolfsonmicro.com> wrote:
> On Thu, Nov 29, 2012 at 10:35:35AM +0530, Naveen Krishna Chatradhi wrote:
>
>> The arbitrator is a general purpose function which uses two GPIOs to
>> communicate with another device to claim/release a bus. We use it to
>> arbitrate an i2c port between the AP and the EC.
>
> Should this not be layerd on top of the I2C controller rather than part
> of the controller driver?  It doesn't seem terribly controller specific.

It was originally done separately but I think it was felt that this
was overly complex. Olof can you please comment on this?

Regards,
Simon
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