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