the following patch was just integrated into master: commit 0390112407c042211428a2aee1ab77422caab338 Author: Siyuan Wang email@example.com Date: Fri May 31 19:36:30 2013 +0800
AMD Parmer: fix issue 'S3 fails to suspend after wake up from USB keyboard'
This issue can be reproduced in Linux by the following steps: 1) use pm-suspend to suspend. 2) use USB keyboard to wake up. 3) use pm-suspend to suspend. FAIL To SUSPEND.
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.
In this patch, I add AcpiGpe0Blk using MMIO access and write 1 on bit 11. I have tested on Parmer.
Change-Id: Iec3078bf29de99683e7cd3ef4e178fbeb4dc09c1 Signed-off-by: Siyuan Wang SiYuan.Wang@amd.com Signed-off-by: Siyuan Wang firstname.lastname@example.org Reviewed-on: http://review.coreboot.org/3347 Tested-by: build bot (Jenkins) Reviewed-by: Dave Frodin email@example.com Reviewed-by: Marc Jones firstname.lastname@example.org Reviewed-by: Ronald G. Minnich email@example.com
See http://review.coreboot.org/3347 for details.