Commit | Line | Data |
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1ea6607d FE |
1 | * Freescale MXS Application UART (AUART) |
2 | ||
254da0d7 OR |
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 | |
1ea6607d FE |
8 | - reg : Address and length of the register set for the device |
9 | - interrupts : Should contain the auart interrupt numbers | |
bcc20f9e SG |
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. | |
e8001632 | 14 | |
254da0d7 OR |
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 | ||
8418e67d | 21 | Optional properties: |
182cdcb8 | 22 | - uart-has-rtscts : Indicate the UART has RTS and CTS lines |
7c573d7e | 23 | for hardware flow control, |
8418e67d | 24 | it also means you enable the DMA support for this UART. |
7c573d7e JU |
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. | |
8418e67d | 29 | |
1ea6607d FE |
30 | Example: |
31 | auart0: serial@8006a000 { | |
32 | compatible = "fsl,imx28-auart", "fsl,imx23-auart"; | |
33 | reg = <0x8006a000 0x2000>; | |
bcc20f9e SG |
34 | interrupts = <112>; |
35 | dmas = <&dma_apbx 8>, <&dma_apbx 9>; | |
36 | dma-names = "rx", "tx"; | |
7c573d7e JU |
37 | cts-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>; |
38 | dsr-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>; | |
39 | dcd-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>; | |
1ea6607d FE |
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 | }; |