From: Chris David <cd@chrisdavid.com>
Date: Sat, 13 Oct 2007 21:56:33 +0000 (+0200)
Subject: i2c-au1550: Fix a misused register problem
X-Git-Tag: v2.6.24-rc1~1339
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a202707e71ff16d5e3a92f40eeaa41f3099dd8c5;p=pandora-kernel.git

i2c-au1550: Fix a misused register problem

Fix a "mis-used register" problem on the AMD MIPS Alchemy au1550
I2C interface.

In summary, the programmable serial controller seems to hang the kernel
when I send a single 'address' byte on the I2C bus.  The patch
essentially uses the PSC_SMBSTAT register's TE (transmit FIFO empty)
bit to check when the transmit FIFO is empty, instead of using the
PSC_SMBEVNT register's TU (transmit underflow) bit.  Using the TE bit
fixed the hang problem.

Signed-off-by: Chris David <cd@chrisdavid.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
---

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