1* Freescale i.MX Universal Asynchronous Receiver/Transmitter (UART) 2 3Required properties: 4- compatible : Should be "fsl,<soc>-uart" 5- reg : Address and length of the register set for the device 6- interrupts : Should contain uart interrupt 7 8Optional properties: 9- fsl,dte-mode : Indicate the uart works in DTE mode. The uart works 10 in DCE mode by default. 11- fsl,inverted-tx , fsl,inverted-rx : Indicate that the hardware attached 12 to the peripheral inverts the signal transmitted or received, 13 respectively, and that the peripheral should invert its output/input 14 using the INVT/INVR registers. 15- rs485-rts-delay, rs485-rts-active-low, rs485-rx-during-tx, 16 linux,rs485-enabled-at-boot-time: see rs485.txt. Note that for RS485 17 you must enable either the "uart-has-rtscts" or the "rts-gpios" 18 properties. In case you use "uart-has-rtscts" the signal that controls 19 the transceiver is actually CTS_B, not RTS_B. CTS_B is always output, 20 and RTS_B is input, regardless of dte-mode. 21 22Please check Documentation/devicetree/bindings/serial/serial.yaml 23for the complete list of generic properties. 24 25Note: Each uart controller should have an alias correctly numbered 26in "aliases" node. 27 28Example: 29 30aliases { 31 serial0 = &uart1; 32}; 33 34uart1: serial@73fbc000 { 35 compatible = "fsl,imx51-uart", "fsl,imx21-uart"; 36 reg = <0x73fbc000 0x4000>; 37 interrupts = <31>; 38 uart-has-rtscts; 39 fsl,dte-mode; 40}; 41