Documentation/devicetree/bindings/dma/fsl-mxs-dma.txt

   1 * Freescale MXS DMA
   2
   3 Required properties:
   4 - compatible : Should be "fsl,<chip>-dma-apbh" or "fsl,<chip>-dma-apbx"
   5 - reg : Should contain registers location and length
   6 - interrupts : Should contain the interrupt numbers of DMA channels.
   7   If a channel is empty/reserved, 0 should be filled in place.
   8 - #dma-cells : Must be <1>.  The number cell specifies the channel ID.
   9 - dma-channels : Number of channels supported by the DMA controller
  10
  11 Optional properties:
  12 - interrupt-names : Name of DMA channel interrupts
  13
  14 Supported chips:
  15 imx23, imx28.
  16
  17 Examples:
  18
  19 dma_apbh: dma-apbh@80004000 {
  20         compatible = "fsl,imx28-dma-apbh";
  21         reg = <0x80004000 0x2000>;
  22         interrupts = <82 83 84 85
  23                       88 88 88 88
  24                       88 88 88 88
  25                       87 86 0 0>;
  26         interrupt-names = "ssp0", "ssp1", "ssp2", "ssp3",
  27                           "gpmi0", "gmpi1", "gpmi2", "gmpi3",
  28                           "gpmi4", "gmpi5", "gpmi6", "gmpi7",
  29                           "hsadc", "lcdif", "empty", "empty";
  30         #dma-cells = <1>;
  31         dma-channels = <16>;
  32 };
  33
  34 dma_apbx: dma-apbx@80024000 {
  35         compatible = "fsl,imx28-dma-apbx";
  36         reg = <0x80024000 0x2000>;
  37         interrupts = <78 79 66 0
  38                       80 81 68 69
  39                       70 71 72 73
  40                       74 75 76 77>;
  41         interrupt-names = "auart4-rx", "auart4-tx", "spdif-tx", "empty",
  42                           "saif0", "saif1", "i2c0", "i2c1",
  43                           "auart0-rx", "auart0-tx", "auart1-rx", "auart1-tx",
  44                           "auart2-rx", "auart2-tx", "auart3-rx", "auart3-tx";
  45         #dma-cells = <1>;
  46         dma-channels = <16>;
  47 };
  48
  49 DMA clients connected to the MXS DMA controller must use the format
  50 described in the dma.txt file.
  51
  52 Examples:
  53
  54 auart0: serial@8006a000 {
  55         compatible = "fsl,imx28-auart", "fsl,imx23-auart";
  56         reg = <0x8006a000 0x2000>;
  57         interrupts = <112>;
  58         dmas = <&dma_apbx 8>, <&dma_apbx 9>;
  59         dma-names = "rx", "tx";
  60 };