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i2c: i801: Restore configuration at shutdown
authorJean Delvare <jdelvare@suse.de>
Wed, 11 Apr 2018 16:05:34 +0000 (18:05 +0200)
committerWolfram Sang <wsa@the-dreams.de>
Wed, 11 Apr 2018 21:08:13 +0000 (23:08 +0200)
commitf7f6d915a10f7f2bce17e3b1b7d3376562395a28
tree16fe45f9a16a4827353f515a50bbbceac1657d17tree | snapshot
parenta086bb8317303dd74725dca933b9b29575159382commit | diff
i2c: i801: Restore configuration at shutdown

On some systems, the BIOS expects certain SMBus register values to
match the hardware defaults. Restore these configuration registers at
shutdown time to avoid confusing the BIOS. This avoids hard-locking
such systems upon reboot.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Tested-by: Jason Andryuk <jandryuk@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@vger.kernel.org
drivers/i2c/busses/i2c-i801.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git