From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean Delvare Subject: [PATCH 1/3] radeonfb: Speed up the I2C buses Date: Tue, 12 Feb 2008 10:19:15 +0100 Message-ID: <20080212101915.1dce8475@hyperion.delvare> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1JOrIV-0000mc-Of for linux-fbdev-devel@lists.sourceforge.net; Tue, 12 Feb 2008 01:19:27 -0800 Received: from smtp-102-tuesday.nerim.net ([62.4.16.102] helo=kraid.nerim.net) by mail.sourceforge.net with esmtp (Exim 4.44) id 1JOrIU-0001cY-B7 for linux-fbdev-devel@lists.sourceforge.net; Tue, 12 Feb 2008 01:19:27 -0800 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-fbdev-devel-bounces@lists.sourceforge.net Errors-To: linux-fbdev-devel-bounces@lists.sourceforge.net To: Benjamin Herrenschmidt Cc: linux-fbdev-devel@lists.sourceforge.net There is no reason to drive the radeon I2C buses at such a low speed, so bump it from 12.5 kbps to 50 kbps. The Intel (i810) and Matrox framebuffer drivers already run their I2C bus at this speed. Signed-off-by: Jean Delvare --- This patch was already sent on: * 2007-03-08 * 2007-09-09 drivers/video/aty/radeon_i2c.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- linux-2.6.21-git.orig/drivers/video/aty/radeon_i2c.c 2007-05-09 10:52:26.000000000 +0200 +++ linux-2.6.21-git/drivers/video/aty/radeon_i2c.c 2007-05-09 10:55:51.000000000 +0200 @@ -77,7 +77,7 @@ static int radeon_setup_i2c_bus(struct r chan->algo.setscl = radeon_gpio_setscl; chan->algo.getsda = radeon_gpio_getsda; chan->algo.getscl = radeon_gpio_getscl; - chan->algo.udelay = 40; + chan->algo.udelay = 10; chan->algo.timeout = 20; chan->algo.data = chan; -- Jean Delvare ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/