Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753512Ab1EJXc4 (ORCPT ); Tue, 10 May 2011 19:32:56 -0400 Received: from cpc7-stkp7-2-0-cust918.10-2.cable.virginmedia.com ([86.22.251.151]:51750 "EHLO freya" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753464Ab1EJXcz (ORCPT ); Tue, 10 May 2011 19:32:55 -0400 X-Greylist: delayed 1438 seconds by postgrey-1.27 at vger.kernel.org; Tue, 10 May 2011 19:32:55 EDT Date: Wed, 11 May 2011 00:08:32 +0100 From: Ben Dooks To: Jean Delvare Cc: Ben Dooks , linux@arm.linux.org.uk, linux-kernel@vger.kernel.org, Haojian Zhuang , Haojian Zhuang , linux-i2c@vger.kernel.org, ben-linux@fluff.org, eric.y.miao@gmail.com, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 1/3] i2c: append hardware lock with bus lock Message-ID: <20110510230832.GE634@freya.fluff.org> References: <1304003746-12127-1-git-send-email-haojian.zhuang@gmail.com> <20110502092734.GV15795@trinity.fluff.org> <20110502114616.7813da79@endymion.delvare> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110502114616.7813da79@endymion.delvare> X-Disclaimer: These are my views alone. X-URL: http://www.fluff.org/ User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1312 Lines: 30 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 > > > Cc: Ben Dooks > > > Cc: Jean Delvare > > > > 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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/