OMAP UART controller Required properties: - compatible : should be "ti,j721e-uart", "ti,am654-uart" for J721E controllers - compatible : should be "ti,am654-uart" for AM654 controllers - compatible : should be "ti,omap2-uart" for OMAP2 controllers - compatible : should be "ti,omap3-uart" for OMAP3 controllers - compatible : should be "ti,omap4-uart" for OMAP4 controllers - compatible : should be "ti,am4372-uart" for AM437x controllers - compatible : should be "ti,am3352-uart" for AM335x controllers - compatible : should be "ti,dra742-uart" for DRA7x controllers - reg : address and length of the register space - interrupts or interrupts-extended : Should contain the uart interrupt specifier or both the interrupt controller phandle and interrupt specifier. - ti,hwmods : Must be "uart", n being the instance number (1-based) Optional properties: - clock-frequency : frequency of the clock input to the UART - dmas : DMA specifier, consisting of a phandle to the DMA controller node and a DMA channel number. - dma-names : "rx" for receive channel, "tx" for transmit channel. - rs485-rts-delay, rs485-rx-during-tx, linux,rs485-enabled-at-boot-time: see rs485.txt - rs485-rts-active-high: drive RTS high when sending (default is low). - clocks: phandle to the functional clock as per Documentation/devicetree/bindings/clock/clock-bindings.txt Example: uart4: serial@49042000 { compatible = "ti,omap3-uart"; reg = <0x49042000 0x400>; interrupts = <80>; dmas = <&sdma 81 &sdma 82>; dma-names = "tx", "rx"; ti,hwmods = "uart4"; clock-frequency = <48000000>; };