linux/Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt
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   1* Freescale MXS Application UART (AUART)
   2
   3Required properties:
   4- compatible : Should be "fsl,<soc>-auart". The supported SoCs include
   5  imx23 and imx28.
   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.
  12
  13Example:
  14auart0: serial@8006a000 {
  15        compatible = "fsl,imx28-auart", "fsl,imx23-auart";
  16        reg = <0x8006a000 0x2000>;
  17        interrupts = <112>;
  18        dmas = <&dma_apbx 8>, <&dma_apbx 9>;
  19        dma-names = "rx", "tx";
  20};
  21
  22Note: Each auart port should have an alias correctly numbered in "aliases"
  23node.
  24
  25Example:
  26
  27aliases {
  28        serial0 = &auart0;
  29        serial1 = &auart1;
  30        serial2 = &auart2;
  31        serial3 = &auart3;
  32        serial4 = &auart4;
  33};
  34