diff --git a/arch/arm/boot/dts/nuvoton-npcm730-gbs.dts b/arch/arm/boot/dts/nuvoton-npcm730-gbs.dts
index d10669fcd527..9e9eba8bad5e 100644
--- a/arch/arm/boot/dts/nuvoton-npcm730-gbs.dts
+++ b/arch/arm/boot/dts/nuvoton-npcm730-gbs.dts
@@ -366,7 +366,7 @@
 		spi-max-frequency = <20000000>;
 		spi-rx-bus-width = <2>;
 		label = "bmc";
-		partitions@80000000 {
+		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
diff --git a/arch/arm/boot/dts/nuvoton-npcm730-gsj.dts b/arch/arm/boot/dts/nuvoton-npcm730-gsj.dts
index 491606c4f044..2a394cc15284 100644
--- a/arch/arm/boot/dts/nuvoton-npcm730-gsj.dts
+++ b/arch/arm/boot/dts/nuvoton-npcm730-gsj.dts
@@ -142,7 +142,7 @@
 		reg = <0>;
 		spi-rx-bus-width = <2>;
 
-		partitions@80000000 {
+		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
diff --git a/arch/arm/boot/dts/nuvoton-npcm730-kudo.dts b/arch/arm/boot/dts/nuvoton-npcm730-kudo.dts
index a0c2d7652625..f7b38bee039b 100644
--- a/arch/arm/boot/dts/nuvoton-npcm730-kudo.dts
+++ b/arch/arm/boot/dts/nuvoton-npcm730-kudo.dts
@@ -388,7 +388,7 @@
 		spi-max-frequency = <5000000>;
 		spi-rx-bus-width = <2>;
 		label = "bmc";
-		partitions@80000000 {
+		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -422,7 +422,7 @@
 		reg = <1>;
 		spi-max-frequency = <5000000>;
 		spi-rx-bus-width = <2>;
-		partitions@88000000 {
+		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -447,7 +447,7 @@
 		reg = <0>;
 		spi-max-frequency = <5000000>;
 		spi-rx-bus-width = <2>;
-		partitions@A0000000 {
+		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
diff --git a/arch/arm/boot/dts/nuvoton-npcm750-evb.dts b/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
index 3dad32834e5e..f53d45fa1de8 100644
--- a/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
+++ b/arch/arm/boot/dts/nuvoton-npcm750-evb.dts
@@ -74,7 +74,7 @@
 		spi-rx-bus-width = <2>;
 		reg = <0>;
 		spi-max-frequency = <5000000>;
-		partitions@80000000 {
+		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -135,7 +135,7 @@
 		spi-rx-bus-width = <2>;
 		reg = <0>;
 		spi-max-frequency = <5000000>;
-		partitions@A0000000 {
+		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
diff --git a/arch/arm/boot/dts/nuvoton-npcm750-runbmc-olympus.dts b/arch/arm/boot/dts/nuvoton-npcm750-runbmc-olympus.dts
index 132e702281fc..87359ab05db3 100644
--- a/arch/arm/boot/dts/nuvoton-npcm750-runbmc-olympus.dts
+++ b/arch/arm/boot/dts/nuvoton-npcm750-runbmc-olympus.dts
@@ -107,7 +107,7 @@
 		reg = <0>;
 		spi-rx-bus-width = <2>;
 
-		partitions@80000000 {
+		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -146,7 +146,7 @@
 		reg = <1>;
 		npcm,fiu-rx-bus-width = <2>;
 
-		partitions@88000000 {
+		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -173,7 +173,7 @@
 		reg = <0>;
 		spi-rx-bus-width = <2>;
 
-		partitions@A0000000 {
+		partitions {
 			compatible = "fixed-partitions";
 			#address-cells = <1>;
 			#size-cells = <1>;
diff --git a/arch/arm/boot/dts/nuvoton-wpcm450-supermicro-x9sci-ln4f.dts b/arch/arm/boot/dts/nuvoton-wpcm450-supermicro-x9sci-ln4f.dts
index 3ee61251a16d..b78c116cbc18 100644
--- a/arch/arm/boot/dts/nuvoton-wpcm450-supermicro-x9sci-ln4f.dts
+++ b/arch/arm/boot/dts/nuvoton-wpcm450-supermicro-x9sci-ln4f.dts
@@ -15,6 +15,11 @@
 	model = "Supermicro X9SCi-LN4F BMC";
 	compatible = "supermicro,x9sci-ln4f-bmc", "nuvoton,wpcm450";
 
+	aliases {
+		serial0 = &serial0;
+		serial1 = &serial1;
+	};
+
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
@@ -53,6 +58,33 @@
 	};
 };
 
+&fiu {
+	status = "okay";
+
+	flash@0 {
+		reg = <0>;
+		compatible = "jedec,spi-nor";
+	};
+};
+
+&gpio0 {
+	gpio-line-names =
+		/* 0 */ "", "host-reset-control-n", "", "", "", "", "", "",
+		/* 8 */ "", "", "", "", "power-chassis-control-n", "", "uid-button", "";
+};
+
+&gpio1 {
+	gpio-line-names =
+		/* 0 */ "", "", "", "", "led-heartbeat", "", "", "led-uid",
+		/* 8 */ "", "", "", "", "", "", "", "";
+};
+
+&gpio4 {
+	gpio-line-names =
+		/* 0 */ "", "", "", "", "", "", "", "",
+		/* 8 */ "", "", "", "", "", "", "", "power-chassis-good";
+};
+
 &pinctrl {
 	key_pins: mux-keys {
 		groups = "gspi", "sspi";
@@ -77,7 +109,3 @@
 	/* "Serial over LAN" port. Connected to ttyS2 of the host system. */
 	status = "okay";
 };
-
-&watchdog0 {
-	status = "okay";
-};
diff --git a/arch/arm/boot/dts/nuvoton-wpcm450.dtsi b/arch/arm/boot/dts/nuvoton-wpcm450.dtsi
index 93595850a4c3..b637241316bb 100644
--- a/arch/arm/boot/dts/nuvoton-wpcm450.dtsi
+++ b/arch/arm/boot/dts/nuvoton-wpcm450.dtsi
@@ -37,6 +37,14 @@
 		#clock-cells = <0>;
 	};
 
+	refclk: clock-48mhz {
+		/* 48 MHz reference oscillator */
+		compatible = "fixed-clock";
+		clock-output-names = "ref";
+		clock-frequency = <48000000>;
+		#clock-cells = <0>;
+	};
+
 	soc {
 		compatible = "simple-bus";
 		#address-cells = <1>;
@@ -49,6 +57,15 @@
 			reg = <0xb0000000 0x200>;
 		};
 
+		clk: clock-controller@b0000200 {
+			compatible = "nuvoton,wpcm450-clk";
+			reg = <0xb0000200 0x100>;
+			clocks = <&refclk>;
+			clock-names = "ref";
+			#clock-cells = <1>;
+			#reset-cells = <1>;
+		};
+
 		serial0: serial@b8000000 {
 			compatible = "nuvoton,wpcm450-uart";
 			reg = <0xb8000000 0x20>;
@@ -81,7 +98,6 @@
 			interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;
 			reg = <0xb800101c 0x4>;
 			clocks = <&clk24m>;
-			status = "disabled";
 		};
 
 		aic: interrupt-controller@b8002000 {
@@ -456,5 +472,21 @@
 				function = "hg7";
 			};
 		};
+
+		fiu: spi-controller@c8000000 {
+			compatible = "nuvoton,wpcm450-fiu";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0xc8000000 0x1000>, <0xc0000000 0x4000000>;
+			reg-names = "control", "memory";
+			clocks = <&clk 0>;
+			status = "disabled";
+		};
+
+		shm: syscon@c8001000 {
+			compatible = "nuvoton,wpcm450-shm", "syscon";
+			reg = <0xc8001000 0x1000>;
+			reg-io-width = <1>;
+		};
 	};
 };