1OMAP UART controller 2 3Required properties: 4- compatible : should be "ti,am64-uart", "ti,am654-uart" for AM64 controllers 5- compatible : should be "ti,j721e-uart", "ti,am654-uart" for J721E controllers 6- compatible : should be "ti,am654-uart" for AM654 controllers 7- compatible : should be "ti,omap2-uart" for OMAP2 controllers 8- compatible : should be "ti,omap3-uart" for OMAP3 controllers 9- compatible : should be "ti,omap4-uart" for OMAP4 controllers 10- compatible : should be "ti,am4372-uart" for AM437x controllers 11- compatible : should be "ti,am3352-uart" for AM335x controllers 12- compatible : should be "ti,dra742-uart" for DRA7x controllers 13- reg : address and length of the register space 14- interrupts or interrupts-extended : Should contain the uart interrupt 15 specifier or both the interrupt 16 controller phandle and interrupt 17 specifier. 18- ti,hwmods : Must be "uart<n>", n being the instance number (1-based) 19 20Optional properties: 21- clock-frequency : frequency of the clock input to the UART 22- dmas : DMA specifier, consisting of a phandle to the DMA controller 23 node and a DMA channel number. 24- dma-names : "rx" for receive channel, "tx" for transmit channel. 25- rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt 26- rs485-rts-active-high: drive RTS high when sending (default is low). 27- clocks: phandle to the functional clock as per 28 Documentation/devicetree/bindings/clock/clock-bindings.txt 29 30Example: 31 32 uart4: serial@49042000 { 33 compatible = "ti,omap3-uart"; 34 reg = <0x49042000 0x400>; 35 interrupts = <80>; 36 dmas = <&sdma 81 &sdma 82>; 37 dma-names = "tx", "rx"; 38 ti,hwmods = "uart4"; 39 clock-frequency = <48000000>; 40 }; 41