FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/serial/fsl-imx-uart.txt

     * Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART)
     
     Required properties:
     - compatible : Should be "fsl,<soc>-uart"
     - reg : Address and length of the register set for the device
     - interrupts : Should contain uart interrupt
     
     Optional properties:
     - fsl,dte-mode : Indicate the uart works in DTE mode. The uart works
                      in DCE mode by default.
    - fsl,inverted-tx , fsl,inverted-rx : Indicate that the hardware attached
      to the peripheral inverts the signal transmitted or received,
      respectively, and that the peripheral should invert its output/input
      using the INVT/INVR registers.
    - rs485-rts-delay, rs485-rts-active-low, rs485-rx-during-tx,
      linux,rs485-enabled-at-boot-time: see rs485.txt. Note that for RS485
      you must enable either the "uart-has-rtscts" or the "rts-gpios"
      properties. In case you use "uart-has-rtscts" the signal that controls
      the transceiver is actually CTS_B, not RTS_B. CTS_B is always output,
      and RTS_B is input, regardless of dte-mode.
    
    Please check Documentation/devicetree/bindings/serial/serial.yaml
    for the complete list of generic properties.
    
    Note: Each uart controller should have an alias correctly numbered
    in "aliases" node.
    
    Example:
    
    aliases {
            serial0 = &uart1;
    };
    
    uart1: serial@73fbc000 {
            compatible = "fsl,imx51-uart", "fsl,imx21-uart";
            reg = <0x73fbc000 0x4000>;
            interrupts = <31>;
            uart-has-rtscts;
            fsl,dte-mode;
    };

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