diff --git a/src/mainboard/google/myst/Kconfig b/src/mainboard/google/myst/Kconfig
index dbce4d8..a35596c 100644
--- a/src/mainboard/google/myst/Kconfig
+++ b/src/mainboard/google/myst/Kconfig
@@ -13,6 +13,7 @@
 	select DRIVERS_I2C_GENERIC
 	select DRIVERS_I2C_HID
 	select DRIVERS_WIFI_GENERIC
+	select DRIVERS_UART_ACPI
 	select EC_GOOGLE_CHROMEEC
 	select EC_GOOGLE_CHROMEEC_ESPI
 	select EC_GOOGLE_CHROMEEC_SKUID
diff --git a/src/mainboard/google/myst/variants/baseboard/gpio.c b/src/mainboard/google/myst/variants/baseboard/gpio.c
index 9b0de5a..7979763 100644
--- a/src/mainboard/google/myst/variants/baseboard/gpio.c
+++ b/src/mainboard/google/myst/variants/baseboard/gpio.c
@@ -68,7 +68,7 @@
 	/* WWAN_AUX_RST_L */
 	PAD_GPO(GPIO_39, HIGH),
 	/* SOC_FP_RST_L */
-	PAD_GPO(GPIO_40, HIGH),
+	PAD_GPO(GPIO_40, LOW),
 	/* GPIO_41 - GPIO_66: Not available */
 	/* GPIO_67 (Unused) */
 	PAD_NC(GPIO_67),
diff --git a/src/mainboard/google/myst/variants/myst/overridetree.cb b/src/mainboard/google/myst/variants/myst/overridetree.cb
index d701dea..d230e50 100644
--- a/src/mainboard/google/myst/variants/myst/overridetree.cb
+++ b/src/mainboard/google/myst/variants/myst/overridetree.cb
@@ -93,4 +93,22 @@
 			device i2c 2a on end
 		end
 	end # I2C3
+	device ref uart_1 on
+		chip drivers/uart/acpi
+			register "name" = ""CRFP""
+			register "desc" = ""Fingerprint Reader""
+			register "hid" = "ACPI_DT_NAMESPACE_HID"
+			register "compat_string" = ""google,cros-ec-uart""
+			register "irq_gpio" = "ACPI_GPIO_IRQ_LEVEL_LOW(GPIO_18)"
+			register "wake" = "GEVENT_14"
+			register "uart" = "ACPI_UART_RAW_DEVICE(3000000, 64)"
+			register "has_power_resource" = "1"
+			register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPIO_40)"
+			register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_4)"
+			register "enable_delay_ms" = "3"
+			device generic 0 alias fpmcu on
+				probe FP UART
+			end
+		end
+	end
 end	# chip soc/amd/phoenix