1* Freescale MXS Application UART (AUART)
2
3Required properties for all SoCs:
4- compatible : Should be one of fallowing variants:
5	"fsl,imx23-auart" - Freescale i.MX23
6	"fsl,imx28-auart" - Freescale i.MX28
7	"alphascale,asm9260-auart" - Alphascale ASM9260
8- reg : Address and length of the register set for the device
9- interrupts : Should contain the auart interrupt numbers
10- dmas: DMA specifier, consisting of a phandle to DMA controller node
11  and AUART DMA channel ID.
12  Refer to dma.txt and fsl-mxs-dma.txt for details.
13- dma-names: "rx" for RX channel, "tx" for TX channel.
14
15Required properties for "alphascale,asm9260-auart":
16- clocks : the clocks feeding the watchdog timer. See clock-bindings.txt
17- clock-names : should be set to
18	"mod" - source for tick counter.
19	"ahb" - ahb gate.
20
21Optional properties:
22- uart-has-rtscts : Indicate the UART has RTS and CTS lines
23  for hardware flow control,
24	it also means you enable the DMA support for this UART.
25- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD
26  line respectively. It will use specified PIO instead of the peripheral
27  function pin for the USART feature.
28  If unsure, don't specify this property.
29
30Example:
31auart0: serial@8006a000 {
32	compatible = "fsl,imx28-auart", "fsl,imx23-auart";
33	reg = <0x8006a000 0x2000>;
34	interrupts = <112>;
35	dmas = <&dma_apbx 8>, <&dma_apbx 9>;
36	dma-names = "rx", "tx";
37	cts-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>;
38	dsr-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
39	dcd-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>;
40};
41
42Note: Each auart port should have an alias correctly numbered in "aliases"
43node.
44
45Example:
46
47aliases {
48	serial0 = &auart0;
49	serial1 = &auart1;
50	serial2 = &auart2;
51	serial3 = &auart3;
52	serial4 = &auart4;
53};
54