1Allwinner A31 DMA Controller
2
3This driver follows the generic DMA bindings defined in dma.txt.
4
5Required properties:
6
7- compatible:	Must be one of
8		  "allwinner,sun6i-a31-dma"
9		  "allwinner,sun8i-a23-dma"
10		  "allwinner,sun8i-h3-dma"
11- reg:		Should contain the registers base address and length
12- interrupts:	Should contain a reference to the interrupt used by this device
13- clocks:	Should contain a reference to the parent AHB clock
14- resets:	Should contain a reference to the reset controller asserting
15		this device in reset
16- #dma-cells :	Should be 1, a single cell holding a line request number
17
18Example:
19	dma: dma-controller@01c02000 {
20		compatible = "allwinner,sun6i-a31-dma";
21		reg = <0x01c02000 0x1000>;
22		interrupts = <0 50 4>;
23		clocks = <&ahb1_gates 6>;
24		resets = <&ahb1_rst 6>;
25		#dma-cells = <1>;
26	};
27
28Clients:
29
30DMA clients connected to the A31 DMA controller must use the format
31described in the dma.txt file, using a two-cell specifier for each
32channel: a phandle plus one integer cells.
33The two cells in order are:
34
351. A phandle pointing to the DMA controller.
362. The port ID as specified in the datasheet
37
38Example:
39spi2: spi@01c6a000 {
40	compatible = "allwinner,sun6i-a31-spi";
41	reg = <0x01c6a000 0x1000>;
42	interrupts = <0 67 4>;
43	clocks = <&ahb1_gates 22>, <&spi2_clk>;
44	clock-names = "ahb", "mod";
45	dmas = <&dma 25>, <&dma 25>;
46	dma-names = "rx", "tx";
47	resets = <&ahb1_rst 22>;
48};
49