From: Lothar Waßmann Date: Fri, 5 Jul 2013 16:28:00 +0000 (+0200) Subject: i2c: mxs: fix broken timing calculation X-Git-Tag: v3.12-rc1~140^2~22 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=869c6a3ededbb108b03a11a7c9d4c8a4fb607063;p=pandora-kernel.git i2c: mxs: fix broken timing calculation The timing calculation is rather bogus and gives extremely wrong results for higher frequencies (on an i.MX28). E.g. instead of 400 kHz I measured 770 kHz. Implement a calculation that adheres to the I2C spec and gives exact results for I2C frequencies from 12.56 kHz to 960 kHz. Also the bus_free and leadin parameters are programmed according to the I2C spec for standard and fast mode. This was tested on a Ka-Ro TX28 module with a DS1339, TSC2007, PCA9554 and SGTL5000 client. Signed-off-by: Lothar Waßmann Acked-by: Marek Vasut [wsa: patch fixes whitespace issue, too] Signed-off-by: Wolfram Sang --- Reading git-diff-tree failed