diff --git a/Documentation/devicetree/bindings/serial/mvebu-uart.txt b/Documentation/devicetree/bindings/serial/mvebu-uart.txt
index 6087defd9f9321b60890212b38f45f45b6ae517e..d37fabe17bd1215df697757e6622aac5f798061e 100644
--- a/Documentation/devicetree/bindings/serial/mvebu-uart.txt
+++ b/Documentation/devicetree/bindings/serial/mvebu-uart.txt
@@ -8,6 +8,6 @@ Required properties:
 Example:
 	serial@12000 {
 		compatible = "marvell,armada-3700-uart";
-		reg = <0x12000 0x400>;
+		reg = <0x12000 0x200>;
 		interrupts = <43>;
 	};
diff --git a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
index 8c0cf7efac65242a50a8ac2b201f351c8c0ce2a6..b554cdaf5e5314563e4dca56ac18326601853365 100644
--- a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
@@ -134,7 +134,7 @@ i2c1: i2c@11080 {
 
 			uart0: serial@12000 {
 				compatible = "marvell,armada-3700-uart";
-				reg = <0x12000 0x400>;
+				reg = <0x12000 0x200>;
 				interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
 				status = "disabled";
 			};