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

   1 * CSR SiRFSoC DMA controller
   2
   3 See dma.txt first
   4
   5 Required properties:
   6 - compatible: Should be "sirf,prima2-dmac", "sirf,atlas7-dmac" or
   7   "sirf,atlas7-dmac-v2"
   8 - reg: Should contain DMA registers location and length.
   9 - interrupts: Should contain one interrupt shared by all channel
  10 - #dma-cells: must be <1>. used to represent the number of integer
  11     cells in the dmas property of client device.
  12 - clocks: clock required
  13
  14 Example:
  15
  16 Controller:
  17 dmac0: dma-controller@b00b0000 {
  18         compatible = "sirf,prima2-dmac";
  19         reg = <0xb00b0000 0x10000>;
  20         interrupts = <12>;
  21         clocks = <&clks 24>;
  22         #dma-cells = <1>;
  23 };
  24
  25
  26 Client:
  27 Fill the specific dma request line in dmas. In the below example, spi0 read
  28 channel request line is 9 of the 2nd dma controller, while write channel uses
  29 4 of the 2nd dma controller; spi1 read channel request line is 12 of the 1st
  30 dma controller, while write channel uses 13 of the 1st dma controller:
  31
  32 spi0: spi@b00d0000 {
  33         compatible = "sirf,prima2-spi";
  34         dmas = <&dmac1 9>,
  35                 <&dmac1 4>;
  36         dma-names = "rx", "tx";
  37 };
  38
  39 spi1: spi@b0170000 {
  40         compatible = "sirf,prima2-spi";
  41         dmas = <&dmac0 12>,
  42                 <&dmac0 13>;
  43         dma-names = "rx", "tx";
  44 };