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Documentation / devicetree / bindings / serial / fsl-mxs-auart.txt




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Based on kernel version 4.8. Page generated on 2016-10-06 23:14 EST.

1	* Freescale MXS Application UART (AUART)
2	
3	Required 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	
15	Required 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	
21	Optional 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	
30	Example:
31	auart0: 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	
42	Note: Each auart port should have an alias correctly numbered in "aliases"
43	node.
44	
45	Example:
46	
47	aliases {
48		serial0 = &auart0;
49		serial1 = &auart1;
50		serial2 = &auart2;
51		serial3 = &auart3;
52		serial4 = &auart4;
53	};
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