1 * Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
4 - compatible: Should be "atmel,<chip>-usart"
5 The compatible <chip> indicated will be the first SoC to support an
6 additional mode or an USART new feature.
7 - reg: Should contain registers location and length
8 - interrupts: Should contain interrupt
9 - clock-names: tuple listing input clock names.
10 Required elements: "usart"
11 - clocks: phandles to input clocks.
14 - atmel,use-dma-rx: use of PDC or DMA for receiving data
15 - atmel,use-dma-tx: use of PDC or DMA for transmitting data
16 - add dma bindings for dma transfer:
17 - dmas: DMA specifier, consisting of a phandle to DMA controller node,
18 memory peripheral interface and USART DMA channel ID, FIFO configuration.
19 Refer to dma.txt and atmel-dma.txt for details.
20 - dma-names: "rx" for RX channel, "tx" for TX channel.
22 <chip> compatible description:
23 - at91rm9200: legacy USART support
24 - at91sam9260: generic USART implementation for SAM9 SoCs
28 usart0: serial@fff8c000 {
29 compatible = "atmel,at91sam9260-usart";
30 reg = <0xfff8c000 0x4000>;
32 clocks = <&usart0_clk>;
33 clock-names = "usart";
39 usart0: serial@f001c000 {
40 compatible = "atmel,at91sam9260-usart";
41 reg = <0xf001c000 0x100>;
42 interrupts = <12 4 5>;
43 clocks = <&usart0_clk>;
44 clock-names = "usart";
49 dma-names = "tx", "rx";