Documentation/devicetree/bindings/dma/mmp-dma.txt

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