linux/Documentation/devicetree/bindings/serial/fsl-imx-uart.txt
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   1* Freescale i.MX UART controller
   2
   3Required properties:
   4- compatible : should be "fsl,imx21-uart"
   5- reg : Address and length of the register set for the device
   6- interrupts : Should contain UART interrupt number
   7
   8Optional properties:
   9- fsl,uart-has-rtscts: indicate that RTS/CTS signals are used
  10
  11Note: Each uart controller should have an alias correctly numbered
  12in "aliases" node.
  13
  14Example:
  15
  16- From imx51.dtsi:
  17aliases {
  18        serial0 = &uart1;
  19        serial1 = &uart2;
  20        serial2 = &uart3;
  21};
  22
  23uart1: serial@73fbc000 {
  24        compatible = "fsl,imx51-uart", "fsl,imx21-uart";
  25        reg = <0x73fbc000 0x4000>;
  26        interrupts = <31>;
  27        status = "disabled";
  28}
  29
  30- From imx51-babbage.dts:
  31uart1: serial@73fbc000 {
  32        fsl,uart-has-rtscts;
  33        status = "okay";
  34};
  35
  36