[PATCH] Resume a K8T800 Mainboard from S3

[PATCH] Resume a K8T800 Mainboard from S3

[karsten wiese]

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Resume an AMD64@K8T800 Mainboard from S3

Make an AMD64@K8T800 Mainboard (MS-6702) resume succesfully
reseting "Abnormal Power-OFF" Bit.
BIOS here doesn't vector back to OS if not done.

Signed-off-by: <annabellesgarden@yahoo.de>


diff -upr rc6-mm2/drivers/acpi/sleep/main.c rc6-mm2-kw/drivers/acpi/sleep/main.c
--- rc6-mm2/drivers/acpi/sleep/main.c	2006-06-10 13:12:46.000000000 +0200
+++ rc6-mm2-kw/drivers/acpi/sleep/main.c	2006-06-15 16:21:55.000000000 +0200
@@ -91,6 +91,15 @@ static int acpi_pm_enter(suspend_state_t
 		break;
 
 	case PM_SUSPEND_MEM:
+		if (acpi_state == ACPI_STATE_S3)
+			/* Make an AMD64@K8T800 Mainboard (MS-6702) resume succesfully
+			   reseting "Abnormal Power-OFF" Bit.
+			   BIOS doesn't vector back to OS if not done.
+			   FIXME: Better move this to PCI-Quirks ?
+			*/
+			acpi_hw_register_write(ACPI_MTX_DO_NOT_LOCK,
+						ACPI_REGISTER_PM1_STATUS,
+					       (u16)0x800);
 		do_suspend_lowlevel();
 		break;
 

Re: [PATCH] Resume a K8T800 Mainboard from S3

[Matthew Garrett]

(patch that clears the abnormal power-off status on a VIA chipset)

This works for fixing suspend on the ECS G320 (which has a different 
southbridge) as well. A quick scan of what datasheets I can get my hands 
on suggest that the same register is used for the purpose on all VIA 
southbridges, so a more generic quirk might be helpful.

-- 
Matthew Garrett | mjg59@srcf.ucam.org