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