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Documentation / devicetree / bindings / dma / mmp-dma.txt




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Based on kernel version 3.16. Page generated on 2014-08-06 21:36 EST.

1	* MARVELL MMP DMA controller
2	
3	Marvell Peripheral DMA Controller
4	Used platforms: pxa688, pxa910, pxa3xx, etc
5	
6	Required properties:
7	- compatible: Should be "marvell,pdma-1.0"
8	- reg: Should contain DMA registers location and length.
9	- interrupts: Either contain all of the per-channel DMA interrupts
10			or one irq for pdma device
11	
12	Optional properties:
13	- #dma-channels: Number of DMA channels supported by the controller (defaults
14	  to 32 when not specified)
15	
16	"marvell,pdma-1.0"
17	Used platforms: pxa25x, pxa27x, pxa3xx, pxa93x, pxa168, pxa910, pxa688.
18	
19	Examples:
20	
21	/*
22	 * Each channel has specific irq
23	 * ICU parse out irq channel from ICU register,
24	 * while DMA controller may not able to distinguish the irq channel
25	 * Using this method, interrupt-parent is required as demuxer
26	 * For example, pxa688 icu register 0x128, bit 0~15 is PDMA channel irq,
27	 * 18~21 is ADMA irq
28	 */
29	pdma: dma-controller@d4000000 {
30		      compatible = "marvell,pdma-1.0";
31		      reg = <0xd4000000 0x10000>;
32		      interrupts = <0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15>;
33		      interrupt-parent = <&intcmux32>;
34		      #dma-channels = <16>;
35	      };
36	
37	/*
38	 * One irq for all channels
39	 * Dmaengine driver (DMA controller) distinguish irq channel via
40	 * parsing internal register
41	 */
42	pdma: dma-controller@d4000000 {
43		      compatible = "marvell,pdma-1.0";
44		      reg = <0xd4000000 0x10000>;
45		      interrupts = <47>;
46		      #dma-channels = <16>;
47	      };
48	
49	
50	Marvell Two Channel DMA Controller used specifically for audio
51	Used platforms: pxa688, pxa910
52	
53	Required properties:
54	- compatible: Should be "marvell,adma-1.0" or "marvell,pxa910-squ"
55	- reg: Should contain DMA registers location and length.
56	- interrupts: Either contain all of the per-channel DMA interrupts
57			or one irq for dma device
58	
59	"marvell,adma-1.0" used on pxa688
60	"marvell,pxa910-squ" used on pxa910
61	
62	Examples:
63	
64	/* each channel has specific irq */
65	adma0: dma-controller@d42a0800 {
66		      compatible = "marvell,adma-1.0";
67		      reg = <0xd42a0800 0x100>;
68		      interrupts = <18 19>;
69		      interrupt-parent = <&intcmux32>;
70	      };
71	
72	/* One irq for all channels */
73	squ: dma-controller@d42a0800 {
74		      compatible = "marvell,pxa910-squ";
75		      reg = <0xd42a0800 0x100>;
76		      interrupts = <46>;
77	      };
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