| * MARVELL MMP DMA controller |
| |
| Marvell Peripheral DMA Controller |
| Used platforms: pxa688, pxa910, pxa3xx, etc |
| |
| Required properties: |
| - compatible: Should be "marvell,pdma-1.0" |
| - reg: Should contain DMA registers location and length. |
| - interrupts: Either contain all of the per-channel DMA interrupts |
| or one irq for pdma device |
| |
| Optional properties: |
| - #dma-channels: Number of DMA channels supported by the controller (defaults |
| to 32 when not specified) |
| - #dma-requests: Number of DMA requestor lines supported by the controller |
| (defaults to 32 when not specified) |
| |
| "marvell,pdma-1.0" |
| Used platforms: pxa25x, pxa27x, pxa3xx, pxa93x, pxa168, pxa910, pxa688. |
| |
| Examples: |
| |
| /* |
| * Each channel has specific irq |
| * ICU parse out irq channel from ICU register, |
| * while DMA controller may not able to distinguish the irq channel |
| * Using this method, interrupt-parent is required as demuxer |
| * For example, pxa688 icu register 0x128, bit 0~15 is PDMA channel irq, |
| * 18~21 is ADMA irq |
| */ |
| pdma: dma-controller@d4000000 { |
| compatible = "marvell,pdma-1.0"; |
| reg = <0xd4000000 0x10000>; |
| interrupts = <0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15>; |
| interrupt-parent = <&intcmux32>; |
| #dma-channels = <16>; |
| }; |
| |
| /* |
| * One irq for all channels |
| * Dmaengine driver (DMA controller) distinguish irq channel via |
| * parsing internal register |
| */ |
| pdma: dma-controller@d4000000 { |
| compatible = "marvell,pdma-1.0"; |
| reg = <0xd4000000 0x10000>; |
| interrupts = <47>; |
| #dma-channels = <16>; |
| }; |
| |
| |
| Marvell Two Channel DMA Controller used specifically for audio |
| Used platforms: pxa688, pxa910 |
| |
| Required properties: |
| - compatible: Should be "marvell,adma-1.0" or "marvell,pxa910-squ" |
| - reg: Should contain DMA registers location and length. |
| - interrupts: Either contain all of the per-channel DMA interrupts |
| or one irq for dma device |
| |
| "marvell,adma-1.0" used on pxa688 |
| "marvell,pxa910-squ" used on pxa910 |
| |
| Examples: |
| |
| /* each channel has specific irq */ |
| adma0: dma-controller@d42a0800 { |
| compatible = "marvell,adma-1.0"; |
| reg = <0xd42a0800 0x100>; |
| interrupts = <18 19>; |
| interrupt-parent = <&intcmux32>; |
| }; |
| |
| /* One irq for all channels */ |
| squ: dma-controller@d42a0800 { |
| compatible = "marvell,pxa910-squ"; |
| reg = <0xd42a0800 0x100>; |
| interrupts = <46>; |
| }; |
