diff --git a/Documentation/devicetree/bindings/serial/mvebu-uart.txt b/Documentation/devicetree/bindings/serial/mvebu-uart.txt
index d37fabe17bd1..2ae2fee7e023 100644
--- a/Documentation/devicetree/bindings/serial/mvebu-uart.txt
+++ b/Documentation/devicetree/bindings/serial/mvebu-uart.txt
@@ -1,13 +1,53 @@
-* Marvell UART : Non standard UART used in some of Marvell EBU SoCs (e.g., Armada-3700)
+* Marvell UART : Non standard UART used in some of Marvell EBU SoCs
+                 e.g., Armada-3700.
 
 Required properties:
-- compatible: "marvell,armada-3700-uart"
+- compatible:
+    - "marvell,armada-3700-uart" for the standard variant of the UART
+      (32 bytes FIFO, no DMA, level interrupts, 8-bit access to the
+      FIFO, baudrate limited to 230400).
+    - "marvell,armada-3700-uart-ext" for the extended variant of the
+      UART (128 bytes FIFO, DMA, front interrupts, 8-bit or 32-bit
+      accesses to the FIFO, baudrate unlimited by the dividers).
 - reg: offset and length of the register set for the device.
-- interrupts: device interrupt
+- clocks: UART reference clock used to derive the baudrate. If no clock
+      is provided (possible only with the "marvell,armada-3700-uart"
+      compatible string for backward compatibility), it will only work
+      if the baudrate was initialized by the bootloader and no baudrate
+      change will then be possible.
+- interrupts:
+    - Must contain three elements for the standard variant of the IP
+      (marvell,armada-3700-uart): "uart-sum", "uart-tx" and "uart-rx",
+      respectively the UART sum interrupt, the UART TX interrupt and
+      UART RX interrupt. A corresponding interrupt-names property must
+      be defined.
+    - Must contain two elements for the extended variant of the IP
+      (marvell,armada-3700-uart-ext): "uart-tx" and "uart-rx",
+      respectively the UART TX interrupt and the UART RX interrupt. A
+      corresponding interrupts-names property must be defined.
+    - For backward compatibility reasons, a single element interrupts
+      property is also supported for the standard variant of the IP,
+      containing only the UART sum interrupt. This form is deprecated
+      and should no longer be used.
 
 Example:
-	serial@12000 {
+	uart0: serial@12000 {
 		compatible = "marvell,armada-3700-uart";
 		reg = <0x12000 0x200>;
-		interrupts = <43>;
+		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";
+	};
+
+	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";
 	};