Based on kernel version 6.8
. Page generated on 2024-03-11 21:26 EST
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 | * 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-channels: deprecated - dma-requests: Number of DMA requestor lines supported by the controller (defaults to 32 when not specified) - #dma-requests: deprecated "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>; }; |