| OMAP UART controller |
| |
| Required properties: |
| - 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>", 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). |
| |
| 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>; |
| }; |
