Documentation/powerpc/dts-bindings/fsl/dma.txt

   1 * Freescale 83xx DMA Controller
   2
   3 Freescale PowerPC 83xx have on chip general purpose DMA controllers.
   4
   5 Required properties:
   6
   7 - compatible        : compatible list, contains 2 entries, first is
   8                  "fsl,CHIP-dma", where CHIP is the processor
   9                  (mpc8349, mpc8360, etc.) and the second is
  10                  "fsl,elo-dma"
  11 - reg               : <registers mapping for DMA general status reg>
  12 - ranges                : Should be defined as specified in 1) to describe the
  13                   DMA controller channels.
  14 - cell-index        : controller index.  0 for controller @ 0x8100
  15 - interrupts        : <interrupt mapping for DMA IRQ>
  16 - interrupt-parent  : optional, if needed for interrupt mapping
  17
  18
  19 - DMA channel nodes:
  20         - compatible        : compatible list, contains 2 entries, first is
  21                          "fsl,CHIP-dma-channel", where CHIP is the processor
  22                          (mpc8349, mpc8350, etc.) and the second is
  23                          "fsl,elo-dma-channel"
  24         - reg               : <registers mapping for channel>
  25         - cell-index        : dma channel index starts at 0.
  26
  27 Optional properties:
  28         - interrupts        : <interrupt mapping for DMA channel IRQ>
  29                           (on 83xx this is expected to be identical to
  30                            the interrupts property of the parent node)
  31         - interrupt-parent  : optional, if needed for interrupt mapping
  32
  33 Example:
  34         dma@82a8 {
  35                 #address-cells = <1>;
  36                 #size-cells = <1>;
  37                 compatible = "fsl,mpc8349-dma", "fsl,elo-dma";
  38                 reg = <82a8 4>;
  39                 ranges = <0 8100 1a4>;
  40                 interrupt-parent = <&ipic>;
  41                 interrupts = <47 8>;
  42                 cell-index = <0>;
  43                 dma-channel@0 {
  44                         compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
  45                         cell-index = <0>;
  46                         reg = <0 80>;
  47                 };
  48                 dma-channel@80 {
  49                         compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
  50                         cell-index = <1>;
  51                         reg = <80 80>;
  52                 };
  53                 dma-channel@100 {
  54                         compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
  55                         cell-index = <2>;
  56                         reg = <100 80>;
  57                 };
  58                 dma-channel@180 {
  59                         compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
  60                         cell-index = <3>;
  61                         reg = <180 80>;
  62                 };
  63         };
  64
  65 * Freescale 85xx/86xx DMA Controller
  66
  67 Freescale PowerPC 85xx/86xx have on chip general purpose DMA controllers.
  68
  69 Required properties:
  70
  71 - compatible        : compatible list, contains 2 entries, first is
  72                  "fsl,CHIP-dma", where CHIP is the processor
  73                  (mpc8540, mpc8540, etc.) and the second is
  74                  "fsl,eloplus-dma"
  75 - reg               : <registers mapping for DMA general status reg>
  76 - cell-index        : controller index.  0 for controller @ 0x21000,
  77                                          1 for controller @ 0xc000
  78 - ranges                : Should be defined as specified in 1) to describe the
  79                   DMA controller channels.
  80
  81 - DMA channel nodes:
  82         - compatible        : compatible list, contains 2 entries, first is
  83                          "fsl,CHIP-dma-channel", where CHIP is the processor
  84                          (mpc8540, mpc8560, etc.) and the second is
  85                          "fsl,eloplus-dma-channel"
  86         - cell-index        : dma channel index starts at 0.
  87         - reg               : <registers mapping for channel>
  88         - interrupts        : <interrupt mapping for DMA channel IRQ>
  89         - interrupt-parent  : optional, if needed for interrupt mapping
  90
  91 Example:
  92         dma@21300 {
  93                 #address-cells = <1>;
  94                 #size-cells = <1>;
  95                 compatible = "fsl,mpc8540-dma", "fsl,eloplus-dma";
  96                 reg = <21300 4>;
  97                 ranges = <0 21100 200>;
  98                 cell-index = <0>;
  99                 dma-channel@0 {
 100                         compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";
 101                         reg = <0 80>;
 102                         cell-index = <0>;
 103                         interrupt-parent = <&mpic>;
 104                         interrupts = <14 2>;
 105                 };
 106                 dma-channel@80 {
 107                         compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";
 108                         reg = <80 80>;
 109                         cell-index = <1>;
 110                         interrupt-parent = <&mpic>;
 111                         interrupts = <15 2>;
 112                 };
 113                 dma-channel@100 {
 114                         compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";
 115                         reg = <100 80>;
 116                         cell-index = <2>;
 117                         interrupt-parent = <&mpic>;
 118                         interrupts = <16 2>;
 119                 };
 120                 dma-channel@180 {
 121                         compatible = "fsl,mpc8540-dma-channel", "fsl,eloplus-dma-channel";
 122                         reg = <180 80>;
 123                         cell-index = <3>;
 124                         interrupt-parent = <&mpic>;
 125                         interrupts = <17 2>;
 126                 };
 127         };