diff --git a/arch/arm64/boot/dts/marvell/armada-3720-db.dts b/arch/arm64/boot/dts/marvell/armada-3720-db.dts
index e6e0f38ce6e1..0f3468e777f7 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-db.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-db.dts
@@ -227,7 +227,7 @@
 
 /*
  * Exported on the micro USB connector CON30(V2.0)/CON32(V1.4) through
- * an FTDI
+ * an FTDI (also on CON24(V2.0)/CON26(V1.4)).
  */
 &uart0 {
 	pinctrl-names = "default";
@@ -235,6 +235,13 @@
 	status = "okay";
 };
 
+/* CON26(V2.0)/CON28(V1.4) */
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart2_pins>;
+	status = "okay";
+};
+
 /* CON27(V2.0)/CON29(V1.4) */
 &usb2 {
 	status = "okay";
diff --git a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
index 2ce52ba74f73..bdfb5553ddb5 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-espressobin.dts
@@ -98,9 +98,21 @@
 
 /* Exported on the micro USB connector J5 through an FTDI */
 &uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_pins>;
 	status = "okay";
 };
 
+/*
+ * Connector J17 and J18 expose a number of different features. Some pins are
+ * multiplexed. This is the case for instance for the following features:
+ * - UART1 (pin 24 = RX, pin 26 = TX). See armada-3720-db.dts for an example of
+ *   how to enable it. Beware that the signals are 1.8V TTL.
+ * - I2C
+ * - SPI
+ * - MMC
+ */
+
 /* J7 */
 &usb3 {
 	status = "okay";
diff --git a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
index d436ed9c5af2..90c26d616a54 100644
--- a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
@@ -55,6 +55,7 @@
 
 	aliases {
 		serial0 = &uart0;
+		serial1 = &uart1;
 	};
 
 	cpus {
@@ -135,7 +136,23 @@
 			uart0: serial@12000 {
 				compatible = "marvell,armada-3700-uart";
 				reg = <0x12000 0x200>;
-				interrupts = <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&xtalclk>;
+				interrupts =
+				<GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
+				<GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
+				<GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
+				interrupt-names = "uart-sum", "uart-tx", "uart-rx";
+				status = "disabled";
+			};
+
+			uart1: serial@12200 {
+				compatible = "marvell,armada-3700-uart-ext";
+				reg = <0x12200 0x30>;
+				clocks = <&xtalclk>;
+				interrupts =
+				<GIC_SPI 30 IRQ_TYPE_EDGE_RISING>,
+				<GIC_SPI 31 IRQ_TYPE_EDGE_RISING>;
+				interrupt-names = "uart-tx", "uart-rx";
 				status = "disabled";
 			};