From: Leilei Shang <shangll@marvell.com>
Date: Fri, 7 Jun 2013 06:38:17 +0000 (+0800)
Subject: i2c: pxa: enable high speed mode for i2c bus
X-Git-Tag: v3.12-rc1~140^2~50
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9d3dda5c0d092d6bc9911bf24de81350d47c6be6;p=pandora-kernel.git

i2c: pxa: enable high speed mode for i2c bus

To enter high speed mode, following steps should be done:
1. When running in high speed mode, i2c clock rate is different
from standard mode. Clock rate must be set according to
specification first.
2. When i2c controller sends a master code and wins arbitration,
high speed mode is entered.

If you want to enable high speed mode, the following members of
platform data should be set to proper value:
1. "high_mode" should be set to "1".
2. "master_code" should be set to "8'b 0000_1xxx"(x is 0 or 1).
   If no master_code is set, set to default value 0xe.
3. "rate" should be set according to specification.

Signed-off-by: Leilei Shang <shangll@marvell.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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