From: Steven A. Falco <sfalco@harris.com>
Date: Mon, 22 Apr 2013 09:34:39 +0000 (+0000)
Subject: i2c: xiic: must always write 16-bit words to TX_FIFO
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~62^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c39e8e4354ce4daf23336de5daa28a3b01f00aa6;p=pandora-kernel.git

i2c: xiic: must always write 16-bit words to TX_FIFO

The TX_FIFO register is 10 bits wide.  The lower 8 bits are the data to be
written, while the upper two bits are flags to indicate stop/start.

The driver apparently attempted to optimize write access, by only writing a
byte in those cases where the stop/start bits are zero.  However, we have
seen cases where the lower byte is duplicated onto the upper byte by the
hardware, which causes inadvertent stop/starts.

This patch changes the write access to the transmit FIFO to always be 16 bits
wide.

Signed off by: Steven A. Falco <sfalco@harris.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
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