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doc: dt: add documentation for nxp,lpc1850-uart 

Add device tree binding documentation for nxp,lpc1850-uart.

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Joachim Eastwood 2015-05-30 23:14:45 +02:00 committed by Greg Kroah-Hartman
parent d2aef35a5c
commit a7a2152837
1 changed files with 28 additions and 0 deletions
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Documentation/devicetree/bindings/serial/nxp,lpc1850-uart.txt Normal file
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* NXP LPC1850 UART
Required properties:
- compatible : "nxp,lpc1850-uart", "ns16550a".
- reg : offset and length of the register set for the device.
- interrupts : should contain uart interrupt.
- clocks : phandle to the input clocks.
- clock-names : required elements: "uartclk", "reg".
Optional properties:
- dmas : Two or more DMA channel specifiers following the
convention outlined in bindings/dma/dma.txt
- dma-names : Names for the dma channels, if present. There must
be at least one channel named "tx" for transmit
and named "rx" for receive.
Since it's also possible to also use the of_serial.c driver all
parameters from 8250.txt also apply but are optional.
Example:
uart0: serial@40081000 {
compatible = "nxp,lpc1850-uart", "ns16550a";
reg = <0x40081000 0x1000>;
reg-shift = <2>;
interrupts = <24>;
clocks = <&ccu2 CLK_APB0_UART0>, <&ccu1 CLK_CPU_UART0>;
clock-names = "uartclk", "reg";
};