linux-kernel - Re: [PATCH] i2c: omap: Clear ARDY bit twice

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Date:	Thu, 10 Oct 2013 09:55:31 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Taras Kondratiuk <taras.kondratiuk@...aro.org>
Cc:	linux-omap@...r.kernel.org, patches@...aro.org,
	steve.mcintyre@...aro.org,
	Grygorii Strashko <grygorii.strashko@...com>,
	Felipe Balbi <balbi@...com>,
	Richard woodruff <r-woodruff2@...com>,
	Tony Lindgren <tony@...mide.com>, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: omap: Clear ARDY bit twice

On Mon, Oct 07, 2013 at 01:41:59PM +0300, Taras Kondratiuk wrote:
> Initially commit cb527ede1bf6ff2008a025606f25344b8ed7b4ac
> "i2c-omap: Double clear of ARDY status in IRQ handler"
> added a workaround for undocumented errata ProDB0017052.
> But then commit 1d7afc95946487945cc7f5019b41255b72224b70
> "i2c: omap: ack IRQ in parts" refactored code and missed
> one of ARDY clearings. So current code violates errata.
> It causes often i2c bus timeouts on my Pandaboard.
> 
> This patch adds a second clearing in place.
> 
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> Signed-off-by: Taras Kondratiuk <taras.kondratiuk@...aro.org>

Applied to for-current with stable tag, thanks!


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