[PATCH 4/4] Documentation: devicetree: add bindings documentation for bcm63xx-uart

[Florian Fainelli <f.fainelli@gmail.com>]

Add the Device Tree binding documentation for the non-standard BCM63xx
UART hardware block found in the BCM63xx DSL SoCs.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 .../devicetree/bindings/serial/bcm63xx-uart.txt    | 24 ++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/serial/bcm63xx-uart.txt

diff --git a/Documentation/devicetree/bindings/serial/bcm63xx-uart.txt b/Documentation/devicetree/bindings/serial/bcm63xx-uart.txt
new file mode 100644
index 0000000..829441d
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/bcm63xx-uart.txt
@@ -0,0 +1,24 @@
+Broadcom BCM63xx UART: Non standard UART used in the Broadcom BCM63xx DSL SoCs
+
+Required properties:
+- compatible: must be "brcm,bcm63xx-uart"
+- reg: offset and length of the register set for the device
+- interrupts: device interrupt
+- clocks: a phandle to the functional clock node
+- clock-names: must be "periph"
+
+Note: each UART port must have an alias correctly numbered in the "aliases"
+node, e.g:
+
+serial0: uart@600 {
+	compatible = "brcm,bcm63xx-uart";
+	reg = <0x600 0x1b>;
+	interrupts = <GIC_SPI 32 0>;
+	clocks = <&periph_clk>;
+	clock-names = "periph";
+};
+
+aliases {
+	uart0 = &serial0;
+	uart1 = &serial1;
+};
-- 
1.8.3.2