3 files changed, 17 insertions, 0 deletions
diff --git a/src/mainboard/google/rex/Kconfig b/src/mainboard/google/rex/Kconfig
index 1f296dea56..076a651ecd 100644
--- a/src/mainboard/google/rex/Kconfig
+++ b/src/mainboard/google/rex/Kconfig
@@ -46,6 +46,14 @@ config CHROMEOS
 	select GBB_FLAG_FORCE_MANUAL_RECOVERY
 	select HAS_RECOVERY_MRC_CACHE
 
+config CHROMEOS_WIFI_SAR
+	bool "Enable SAR options for ChromeOS build"
+	depends on CHROMEOS
+	select DSAR_ENABLE
+	select GEO_SAR_ENABLE
+	select SAR_ENABLE
+	select USE_SAR
+
 config DEVICETREE
 	default "variants/baseboard/\$(CONFIG_BASEBOARD_DIR)/devicetree.cb"
 
diff --git a/src/mainboard/google/rex/variants/rex0/Makefile.inc b/src/mainboard/google/rex/variants/rex0/Makefile.inc
index 2fa692abed..86a10df2a0 100644
--- a/src/mainboard/google/rex/variants/rex0/Makefile.inc
+++ b/src/mainboard/google/rex/variants/rex0/Makefile.inc
@@ -1,3 +1,4 @@
 bootblock-y += gpio.c
 romstage-y += gpio.c
 ramstage-y += gpio.c
+ramstage-y += variant.c
diff --git a/src/mainboard/google/rex/variants/rex0/variant.c b/src/mainboard/google/rex/variants/rex0/variant.c
new file mode 100644
index 0000000000..6a79780f6e
--- /dev/null
+++ b/src/mainboard/google/rex/variants/rex0/variant.c
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <sar.h>
+
+const char *get_wifi_sar_cbfs_filename(void)
+{
+	return "wifi_sar_0.hex";
+}