1 * Freescale MXS Application UART (AUART)
4 - compatible : Should be "fsl,<soc>-auart". The supported SoCs include
6 - reg : Address and length of the register set for the device
7 - interrupts : Should contain the auart interrupt numbers
8 - dmas: DMA specifier, consisting of a phandle to DMA controller node
9 and AUART DMA channel ID.
10 Refer to dma.txt and fsl-mxs-dma.txt for details.
11 - dma-names: "rx" for RX channel, "tx" for TX channel.
14 - fsl,uart-has-rtscts : Indicate the UART has RTS and CTS lines
15 for hardware flow control,
16 it also means you enable the DMA support for this UART.
17 - {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD
18 line respectively. It will use specified PIO instead of the peripheral
19 function pin for the USART feature.
20 If unsure, don't specify this property.
23 auart0: serial@8006a000 {
24 compatible = "fsl,imx28-auart", "fsl,imx23-auart";
25 reg = <0x8006a000 0x2000>;
27 dmas = <&dma_apbx 8>, <&dma_apbx 9>;
28 dma-names = "rx", "tx";
29 cts-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>;
30 dsr-gpios = <&gpio1 16 GPIO_ACTIVE_LOW>;
31 dcd-gpios = <&gpio1 17 GPIO_ACTIVE_LOW>;
34 Note: Each auart port should have an alias correctly numbered in "aliases"