AMD Kabini: fix issue 'S3 fails to suspend after wake up from USB keyboard'

Propagated from
http://review.coreboot.org/3347
http://review.coreboot.org/3374

The cause of this issue is:
USB devices use bit 11(0x0b) of GP0_STS represents S3 wake up event,
but this bit is not clear after wake up. So OS thinks there is a
wake up signal and wake up immediately.

Both amd/olivehill and asrock/imb-a180 have been validated.

Change-Id: I7c26cb07bcd2e62bb792809b67314e5155c6adf6
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/4261
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

0 files changed, 0 insertions, 0 deletions