mb/system76: Enable S0ix for darp8/darp9

The newer batch of these boards do not de-assert VW PLTRST# on S3
resume, causing the units to not power on in the EC code. Switch them to
S0ix as a workaround.

Enable CSME in CMOS options by default so that S0ix will work.

Change-Id: I95337c1391102db9e020e82bdd938659c1a4f905
Signed-off-by: Tim Crawford <tcrawford@system76.com>

Author: crawfxrd

src/mainboard/system76/adl/Kconfig

@@ -98,6 +98,10 @@ config MAINBOARD_VERSION
 	default "oryp9" if BOARD_SYSTEM76_ORYP9
 	default "oryp10" if BOARD_SYSTEM76_ORYP10
 
+config CMOS_DEFAULT_FILE
+	default "src/mainboard/\$(MAINBOARDDIR)/cmos-csme.default" if BOARD_SYSTEM76_DARP8
+	default "src/mainboard/\$(MAINBOARDDIR)/cmos.default"
+
 config CONSOLE_POST
 	default y
 

src/mainboard/system76/adl/cmos-csme.default

@@ -0,0 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+boot_option=Fallback
+debug_level=Debug
+me_state=Enable

src/mainboard/system76/adl/variants/darp8/overridetree.cb

@@ -1,6 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 chip soc/intel/alderlake
+	register "s0ix_enable" = "1"
+
 	register "power_limits_config[ADL_P_282_442_482_28W_CORE]" = "{
 		.tdp_pl1_override = 20,
 		.tdp_pl2_override = 56,

src/mainboard/system76/rpl/Kconfig

@@ -161,6 +161,10 @@ config MAINBOARD_VERSION
 	default "oryp12" if BOARD_SYSTEM76_ORYP12
 	default "serw13" if BOARD_SYSTEM76_SERW13
 
+config CMOS_DEFAULT_FILE
+	default "src/mainboard/\$(MAINBOARDDIR)/cmos-csme.default" if BOARD_SYSTEM76_DARP9
+	default "src/mainboard/\$(MAINBOARDDIR)/cmos.default"
+
 config CONSOLE_POST
 	default y
 

src/mainboard/system76/rpl/cmos-csme.default

@@ -0,0 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+boot_option=Fallback
+debug_level=Debug
+me_state=Enable

src/mainboard/system76/rpl/variants/darp9/overridetree.cb

@@ -1,6 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
 
 chip soc/intel/alderlake
+	register "s0ix_enable" = "1"
+
 	register "power_limits_config[RPL_P_682_482_282_28W_CORE]" = "{
 		.tdp_pl1_override = 20,
 		.tdp_pl2_override = 56,