k3dma.txt

 1* Hisilicon K3 DMA controller
 2
 3See dma.txt first
 4
 5Required properties:
 6- compatible: Must be one of
 7-              "hisilicon,k3-dma-1.0"
 8-              "hisilicon,hisi-pcm-asp-dma-1.0"
 9- reg: Should contain DMA registers location and length.
10- interrupts: Should contain one interrupt shared by all channel
11- #dma-cells: see dma.txt, should be 1, para number
12- dma-channels: physical channels supported
13- dma-requests: virtual channels supported, each virtual channel
14		have specific request line
15- clocks: clock required
16
17Example:
18
19Controller:
20		dma0: dma@fcd02000 {
21			compatible = "hisilicon,k3-dma-1.0";
22			reg = <0xfcd02000 0x1000>;
23			#dma-cells = <1>;
24			dma-channels = <16>;
25			dma-requests = <27>;
26			interrupts = <0 12 4>;
27			clocks = <&pclk>;
28		};
29
30Client:
31Use specific request line passing from dmax
32For example, i2c0 read channel request line is 18, while write channel use 19
33
34		i2c0: i2c@fcb08000 {
35			compatible = "snps,designware-i2c";
36			dmas =	<&dma0 18          /* read channel */
37				 &dma0 19>;        /* write channel */
38			dma-names = "rx", "tx";
39		};
40
41		i2c1: i2c@fcb09000 {
42			compatible = "snps,designware-i2c";
43			dmas =	<&dma0 20          /* read channel */
44				 &dma0 21>;        /* write channel */
45			dma-names = "rx", "tx";
46		};
47