[coreboot-gerrit] Change in coreboot[master]: mb/google/dedede/var/kracko: Add FW_CONFIG probe for EXT_VR

[Karthik Ramasubramanian (Code Review)]

Karthik Ramasubramanian has submitted this change. ( https://review.coreboot.org/c/coreboot/+/63111 )

Change subject: mb/google/dedede/var/kracko: Add FW_CONFIG probe for EXT_VR
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mb/google/dedede/var/kracko: Add FW_CONFIG probe for EXT_VR

Add FW_CONFIG probe for absent ANPEC APW8738BQBI IC on kracko.

BUG=b:223687184
TEST=emerge-dedede coreboot

Signed-off-by: Robert Chen 
Change-Id: Ib12265591e679e6b9ed34299f1256db05147eaef
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63111
Tested-by: build bot (Jenkins) 
Reviewed-by: Henry Sun 
Reviewed-by: Shou-Chieh Hsu 
Reviewed-by: Karthik Ramasubramanian 
Reviewed-by: Eric Lai 
---
M src/mainboard/google/dedede/variants/kracko/Makefile.inc
A src/mainboard/google/dedede/variants/kracko/ramstage.c
2 files changed, 19 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Karthik Ramasubramanian: Looks good to me, approved
  Henry Sun: Looks good to me, but someone else must approve
  Shou-Chieh Hsu: Looks good to me, but someone else must approve
  Eric Lai: Looks good to me, approved

diff --git a/src/mainboard/google/dedede/variants/kracko/Makefile.inc b/src/mainboard/google/dedede/variants/kracko/Makefile.inc
index a722a06..d4d5a24 100644
--- a/src/mainboard/google/dedede/variants/kracko/Makefile.inc
+++ b/src/mainboard/google/dedede/variants/kracko/Makefile.inc
@@ -4,4 +4,6 @@

ramstage-y += gpio.c

+ramstage-y += ramstage.c
+
 smm-y += variant.c
diff --git a/src/mainboard/google/dedede/variants/kracko/ramstage.c b/src/mainboard/google/dedede/variants/kracko/ramstage.c
new file mode 100644
index 0000000..255e585
--- /dev/null
+++ b/src/mainboard/google/dedede/variants/kracko/ramstage.c
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <baseboard/variants.h>
+#include <fw_config.h>
+#include <soc/soc_chip.h>
+
+static void ext_vr_update(void)
+{
+	struct soc_intel_jasperlake_config *cfg = config_of_soc();
+	if (fw_config_probe(FW_CONFIG(EXT_VR, EXT_VR_ABSENT)))
+		cfg->disable_external_bypass_vr = 1;
+}
+
+void variant_devtree_update(void)
+{
+	ext_vr_update();
+}