diff --git a/src/mainboard/google/brya/variants/volmar/overridetree.cb b/src/mainboard/google/brya/variants/volmar/overridetree.cb
index ce5cbdaf81..056467c978 100644
--- a/src/mainboard/google/brya/variants/volmar/overridetree.cb
+++ b/src/mainboard/google/brya/variants/volmar/overridetree.cb
@@ -19,6 +19,10 @@ fw_config
 		option BOOT_EMMC_DISABLED		0
 		option BOOT_EMMC_ENABLED		1
 	end
+	field FPMCU_MASK 10
+		option FPMCU_ENABLED		0
+		option FPMCU_DISABLED		1
+	end
 end
 chip soc/intel/alderlake
 	register "sagv" = "SaGv_Enabled"
@@ -321,7 +325,9 @@ chip soc/intel/alderlake
 				register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_D1)"
 				register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_D2)"
 				register "enable_delay_ms" = "3"
-				device spi 0 on end
+				device spi 0 on
+					probe FPMCU_MASK FPMCU_ENABLED
+				end
 			end # FPMCU
 		end
 		device ref pch_espi on
diff --git a/src/mainboard/google/brya/variants/volmar/variant.c b/src/mainboard/google/brya/variants/volmar/variant.c
index 86c65c7ea7..d1ef1fa645 100644
--- a/src/mainboard/google/brya/variants/volmar/variant.c
+++ b/src/mainboard/google/brya/variants/volmar/variant.c
@@ -14,4 +14,8 @@ void variant_update_soc_chip_config(struct soc_intel_alderlake_config *config)
 {
 	config->cnvi_bt_audio_offload = fw_config_probe(FW_CONFIG(AUDIO,
 							MAX98373_NAU88L25B_I2S));
+
+	if (fw_config_probe(FW_CONFIG(FPMCU_MASK, FPMCU_DISABLED)))
+		config->serial_io_gspi_mode[PchSerialIoIndexGSPI1] = PchSerialIoDisabled;
+
 }