diff --git a/drivers/espi/Kconfig.npcx b/drivers/espi/Kconfig.npcx
index 8eb82da..e127fd7 100644
--- a/drivers/espi/Kconfig.npcx
+++ b/drivers/espi/Kconfig.npcx
@@ -25,7 +25,4 @@
 config ESPI_PERIPHERAL_DEBUG_PORT_80
 	default y
 
-config ESPI_PERIPHERAL_UART
-	default y
-
 endif #ESPI_NPCX
diff --git a/dts/arm/nuvoton/npcx7m6fb.dtsi b/dts/arm/nuvoton/npcx7m6fb.dtsi
index 0d3c468..94459a0 100644
--- a/dts/arm/nuvoton/npcx7m6fb.dtsi
+++ b/dts/arm/nuvoton/npcx7m6fb.dtsi
@@ -474,12 +474,6 @@
 			interrupt-names = "kbc_ibf", "kbc_obe", "pmch_ibf",
 					  "pmch_obe", "p80_fifo";
 
-			/* Host serial port pinmux PIN75 86 36 33 42 C7 B3 B2 */
-			pinctrl-0 = <&altb_rxd_sl &altb_txd_sl
-						&altb_rts_sl &altb_cts_sl
-						&altb_ri_sl &altb_dtr_bout_sl
-						&altb_dcd_sl &altb_dsr_sl>;
-
 			/* WUI map for accessing host sub-modules */
 			host_acc_wui = <&wui_host_acc>;
 
@@ -491,6 +485,17 @@
 				<&pcc NPCX_CLOCK_BUS_APB3 NPCX_PWDWN_CTL5 7>;
 			label = "HOST_SUBS";
 		};
+
+		host_uart: io_host_uart {
+			compatible = "nuvoton,npcx-host-uart";
+			/* Host serial port pinmux PIN75 86 36 33 42 C7 B3 B2 */
+			pinctrl-0 = <&altb_rxd_sl &altb_txd_sl
+						&altb_rts_sl &altb_cts_sl
+						&altb_ri_sl &altb_dtr_bout_sl
+						&altb_dcd_sl &altb_dsr_sl>;
+			label = "HOST_UART_IO";
+			status = "disabled";
+		};
 	};
 };
 
diff --git a/dts/bindings/espi/nuvoton,npcx-host-sub.yaml b/dts/bindings/espi/nuvoton,npcx-host-sub.yaml
index ff7432a..2a65859 100644
--- a/dts/bindings/espi/nuvoton,npcx-host-sub.yaml
+++ b/dts/bindings/espi/nuvoton,npcx-host-sub.yaml
@@ -16,11 +16,6 @@
         required: true
         description: configurations of device source clock controller
 
-    pinctrl-0:
-        type: phandles
-        required: true
-        description: configurations of host uart pinmux controllers
-
     host_acc_wui:
         type: phandle
         required: true
diff --git a/dts/bindings/espi/nuvoton,npcx-host-uart.yaml b/dts/bindings/espi/nuvoton,npcx-host-uart.yaml
new file mode 100644
index 0000000..c3413ad
--- /dev/null
+++ b/dts/bindings/espi/nuvoton,npcx-host-uart.yaml
@@ -0,0 +1,14 @@
+# Copyright (c) 2020 Nuvoton Technology Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+description: Nuvoton, NPCX-Host UART IO node
+
+compatible: "nuvoton,npcx-host-uart"
+
+include: [base.yaml]
+
+properties:
+    pinctrl-0:
+        type: phandles
+        required: true
+        description: configurations of host uart pinmux controllers