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Documentation / devicetree / bindings / dma / k3dma.txt




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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:00 EST.

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