linux-kernel - Re: [PATCH] i2c-designware: 10-bit addressing mode enabling if I2C_DYNAMIC_TAR

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Message-ID: <20130927022234.GA3159@katana>
Date:	Fri, 27 Sep 2013 04:22:35 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	"Chew, Chiau Ee" <chiau.ee.chew@...el.com>
Cc:	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Christian Ruppert <christian.ruppert@...lis.com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c-designware: 10-bit addressing mode enabling if
 I2C_DYNAMIC_TAR_UPDATE is set.

On Fri, Sep 27, 2013 at 02:57:35AM +0800, Chew, Chiau Ee wrote:
> According to Designware I2C spec, if I2C_DYNAMIC_TAR_UPDATE is set to 1,
> the 10-bit addressing mode is controlled by IC_10BITADDR_MASTER bit of
> IC_TAR register instead of IC_CON register. The IC_10BITADDR_MASTER
> in IC_CON register becomes read-only copy. Since I2C_DYNAMIC_TAR_UPDATE
> value can't be detected from hardware register, so we will always set the
> IC_10BITADDR_MASTER bit in both IC_CON and IC_TAR register whenever 10-bit
> addresing mode is requested by user application.
> 
> Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@...el.com>
> Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>

Applied to for-current, thanks!


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