linux-kernel - Re: [PATCH 1/3] i2c: append hardware lock with bus lock

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Date:	Wed, 11 May 2011 00:08:32 +0100
From:	Ben Dooks <ben-i2c@...ff.org>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Ben Dooks <ben-i2c@...ff.org>, linux@....linux.org.uk,
	linux-kernel@...r.kernel.org,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Haojian Zhuang <haojian.zhuang@...vell.com>,
	linux-i2c@...r.kernel.org, ben-linux@...ff.org,
	eric.y.miao@...il.com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] i2c: append hardware lock with bus lock

On Mon, May 02, 2011 at 11:46:16AM +0200, Jean Delvare wrote:
> On Mon, 2 May 2011 10:27:34 +0100, Ben Dooks wrote:
> > On Thu, Apr 28, 2011 at 11:15:44PM +0800, Haojian Zhuang wrote:
> > > Both AP and CP are contained in Marvell PXA910 silicon. These two ARM
> > > cores are sharing one pair of I2C pins.
> > > 
> > > In order to keep I2C transaction operated with atomic, hardware lock
> > > (RIPC) is required. Because of this, bus lock in AP side can't afford
> > > this requirement. Now hardware lock is appended.
> > > 
> > > Signed-off-by: Haojian Zhuang <haojian.zhuang@...vell.com>
> > > Cc: Ben Dooks <ben-linux@...ff.org>
> > > Cc: Jean Delvare <khali@...ux-fr.org>
> > 
> > Right, this looks like a reasonable explanation of what is going on here
> > and if Jean is happy with the core changes I'll look at where the driver
> > change can go.
> 
> Yes I am!
> 
> Let me know if you want me to take the core change in my tree or if you
> prefer to have it in yours to avoid a dependency.

if it'll go in my tree ok, then yes.
Will publish a new tree soon.
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