1* ARM AMBA Primecell PL011 serial UART
2
3Required properties:
4- compatible: must be "arm,primecell", "arm,pl011"
5- reg: exactly one register range with length 0x1000
6- interrupts: exactly one interrupt specifier
7
8Optional properties:
9- pinctrl:
10	   When present, must have one state named "default",
11	   and may contain a second name named "sleep". The former
12	   state sets up pins for ordinary operation whereas
13	   the latter state will put the associated pins to sleep
14	   when the UART is unused
15- clocks:
16	   When present, the first clock listed must correspond to
17	   the clock named UARTCLK on the IP block, i.e. the clock
18	   to the external serial line, whereas the second clock
19	   must correspond to the PCLK clocking the internal logic
20	   of the block. Just listing one clock (the first one) is
21	   deprecated.
22- clocks-names:
23	   When present, the first clock listed must be named
24	   "uartclk" and the second clock listed must be named
25	   "apb_pclk"
26- dmas:	
27	   When present, may have one or two dma channels.
28	   The first one must be named "rx", the second one
29	   must be named "tx".
30- auto-poll:
31	   Enables polling when using RX DMA.
32- poll-rate-ms:
33	   Rate at which poll occurs when auto-poll is set,
34	   default 100ms.
35- poll-timeout-ms:
36	   Poll timeout when auto-poll is set, default
37	   3000ms.
38
39See also bindings/arm/primecell.txt
40
41Example:
42
43uart@80120000 {
44	compatible = "arm,pl011", "arm,primecell";
45	reg = <0x80120000 0x1000>;
46	interrupts = <0 11 IRQ_TYPE_LEVEL_HIGH>;
47	dmas = <&dma 13 0 0x2>, <&dma 13 0 0x0>;
48	dma-names = "rx", "tx";
49	clocks = <&foo_clk>, <&bar_clk>;
50	clock-names = "uartclk", "apb_pclk";
51};
52