1* Spreadtrum serial UART 2 3Required properties: 4- compatible: must be one of: 5 * "sprd,sc9836-uart" 6 * "sprd,sc9860-uart", "sprd,sc9836-uart" 7 8- reg: offset and length of the register set for the device 9- interrupts: exactly one interrupt specifier 10- clock-names: Should contain following entries: 11 "enable" for UART module enable clock, 12 "uart" for UART clock, 13 "source" for UART source (parent) clock. 14- clocks: Should contain a clock specifier for each entry in clock-names. 15 UART clock and source clock are optional properties, but enable clock 16 is required. 17 18Optional properties: 19- dma-names: Should contain "rx" for receive and "tx" for transmit channels. 20- dmas: A list of dma specifiers, one for each entry in dma-names. 21 22Example: 23 uart0: serial@0 { 24 compatible = "sprd,sc9860-uart", 25 "sprd,sc9836-uart"; 26 reg = <0x0 0x100>; 27 interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>; 28 dma-names = "rx", "tx"; 29 dmas = <&ap_dma 19>, <&ap_dma 20>; 30 clock-names = "enable", "uart", "source"; 31 clocks = <&clk_ap_apb_gates 9>, <&clk_uart0>, <&ext_26m>; 32 }; 33