---

yaml
---
r: 256777
b: refs/heads/master
c: 61ab1a9
h: refs/heads/master
i:
  256775: cf138eb
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 15c3597d6ea47e8f3caf068887c4666165df63ad
+refs/heads/master: 61ab1a90d81b5b8a53fc221a3665715c61614fb7

trunk/Documentation/devicetree/bindings/tty/serial/of-serial.txt

@@ -0,0 +1,33 @@
+* UART (Universal Asynchronous Receiver/Transmitter)
+
+Required properties:
+- compatible : one of:
+	- "ns8250"
+	- "ns16450"
+	- "ns16550a"
+	- "ns16550"
+	- "ns16750"
+	- "ns16850"
+	- "nvidia,tegra250-uart"
+	- "ibm,qpace-nwp-serial"
+	- "serial" if the port type is unknown.
+- reg : offset and length of the register set for the device.
+- interrupts : should contain uart interrupt.
+- clock-frequency : the input clock frequency for the UART.
+
+Optional properties:
+- current-speed : the current active speed of the UART.
+- reg-offset : offset to apply to the mapbase from the start of the registers.
+- reg-shift : quantity to shift the register offsets by.
+- used-by-rtas : set to indicate that the port is in use by the OpenFirmware
+  RTAS and should not be registered.
+
+Example:
+
+	uart@80230000 {
+		compatible = "ns8250";
+		reg = <0x80230000 0x100>;
+		clock-frequency = <3686400>;
+		interrupts = <10>;
+		reg-shift = <2>;
+	};