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- rs485-rts-delay, rs485-rts-active-low, rs485-rx-during-tx, 12 linux,rs485-enabled-at-boot-time: see rs485.txt. Note that for RS485 13 you must enable either the "uart-has-rtscts" or the "rts-gpios" 14 properties. In case you use "uart-has-rtscts" the signal that controls 15 the transceiver is actually CTS_B, not RTS_B. CTS_B is always output, 16 and RTS_B is input, regardless of dte-mode. 17 18Please check Documentation/devicetree/bindings/serial/serial.txt 19for the complete list of generic properties. 20 21Note: Each uart controller should have an alias correctly numbered 22in "aliases" node. 23 24Example: 25 26aliases { 27 serial0 = &uart1; 28}; 29 30uart1: serial@73fbc000 { 31 compatible = "fsl,imx51-uart", "fsl,imx21-uart"; 32 reg = <0x73fbc000 0x4000>; 33 interrupts = <31>; 34 uart-has-rtscts; 35 fsl,dte-mode; 36}; 37