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| -rw-r--r-- | Documentation/devicetree/bindings/dma/mmp-dma.txt | 74 |
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diff --git a/Documentation/devicetree/bindings/dma/mmp-dma.txt b/Documentation/devicetree/bindings/dma/mmp-dma.txt new file mode 100644 index 000000000000..a4fa4efa1d83 --- /dev/null +++ b/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 | }; | ||
