From 0eb5974def63a2fc0dce6dfdad62b0b4c6f4b865 Mon Sep 17 00:00:00 2001
From: Arthur Heymans <arthur@aheymans.xyz>
Date: Tue, 25 Apr 2023 16:23:37 +0200
Subject: acpigen: Add a runtime method to override exposed _Sx sleep states

This allows mainboards to override available sleep states at runtime.
This is done by adding a IntObj in SSDT that DSDT consumes to override
the available _Sx states.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: Ic21830c1ef9c183b1e3005cc1f8b7daf7e9ea998
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74762
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>
Reviewed-by: Jan Samek <jan.samek@siemens.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
---
 src/southbridge/intel/common/acpi/sleepstates.asl | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/southbridge')

diff --git a/src/southbridge/intel/common/acpi/sleepstates.asl b/src/southbridge/intel/common/acpi/sleepstates.asl
index 079ab1ab84..14ed86e91e 100644
--- a/src/southbridge/intel/common/acpi/sleepstates.asl
+++ b/src/southbridge/intel/common/acpi/sleepstates.asl
@@ -15,6 +15,11 @@ If (CONFIG(DISABLE_ACPI_HIBERNATE)) {
 	SSFG &= 0xf7
 }
 
+External (\OSFG, IntObj)
+If (CondRefOf(\OSFG)) {
+	SSFG = \OSFG
+}
+
 /* Supported sleep states: */
 Name(\_S0, Package () {0x00, 0x00, 0x00, 0x00} )	/* (S0) - working state */
 
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