| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | - #dma-channels: deprecated |
| 16 | - dma-requests: Number of DMA requestor lines supported by the controller |
| 17 | (defaults to 32 when not specified) |
| 18 | - #dma-requests: deprecated |
| 19 | |
| 20 | "marvell,pdma-1.0" |
| 21 | Used platforms: pxa25x, pxa27x, pxa3xx, pxa93x, pxa168, pxa910, pxa688. |
| 22 | |
| 23 | Examples: |
| 24 | |
| 25 | /* |
| 26 | * Each channel has specific irq |
| 27 | * ICU parse out irq channel from ICU register, |
| 28 | * while DMA controller may not able to distinguish the irq channel |
| 29 | * Using this method, interrupt-parent is required as demuxer |
| 30 | * For example, pxa688 icu register 0x128, bit 0~15 is PDMA channel irq, |
| 31 | * 18~21 is ADMA irq |
| 32 | */ |
| 33 | pdma: dma-controller@d4000000 { |
| 34 | compatible = "marvell,pdma-1.0"; |
| 35 | reg = <0xd4000000 0x10000>; |
| 36 | interrupts = <0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15>; |
| 37 | interrupt-parent = <&intcmux32>; |
| 38 | dma-channels = <16>; |
| 39 | }; |
| 40 | |
| 41 | /* |
| 42 | * One irq for all channels |
| 43 | * Dmaengine driver (DMA controller) distinguish irq channel via |
| 44 | * parsing internal register |
| 45 | */ |
| 46 | pdma: dma-controller@d4000000 { |
| 47 | compatible = "marvell,pdma-1.0"; |
| 48 | reg = <0xd4000000 0x10000>; |
| 49 | interrupts = <47>; |
| 50 | dma-channels = <16>; |
| 51 | }; |
| 52 | |
| 53 | |
| 54 | Marvell Two Channel DMA Controller used specifically for audio |
| 55 | Used platforms: pxa688, pxa910 |
| 56 | |
| 57 | Required properties: |
| 58 | - compatible: Should be "marvell,adma-1.0" or "marvell,pxa910-squ" |
| 59 | - reg: Should contain DMA registers location and length. |
| 60 | - interrupts: Either contain all of the per-channel DMA interrupts |
| 61 | or one irq for dma device |
| 62 | |
| 63 | "marvell,adma-1.0" used on pxa688 |
| 64 | "marvell,pxa910-squ" used on pxa910 |
| 65 | |
| 66 | Examples: |
| 67 | |
| 68 | /* each channel has specific irq */ |
| 69 | adma0: dma-controller@d42a0800 { |
| 70 | compatible = "marvell,adma-1.0"; |
| 71 | reg = <0xd42a0800 0x100>; |
| 72 | interrupts = <18 19>; |
| 73 | interrupt-parent = <&intcmux32>; |
| 74 | }; |
| 75 | |
| 76 | /* One irq for all channels */ |
| 77 | squ: dma-controller@d42a0800 { |
| 78 | compatible = "marvell,pxa910-squ"; |
| 79 | reg = <0xd42a0800 0x100>; |
| 80 | interrupts = <46>; |
| 81 | }; |