Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt

   1 * Renesas USB DMA Controller Device Tree bindings
   2
   3 Required Properties:
   4 - compatible: must contain "renesas,usb-dmac"
   5 - reg: base address and length of the registers block for the DMAC
   6 - interrupts: interrupt specifiers for the DMAC, one for each entry in
   7   interrupt-names.
   8 - interrupt-names: one entry per channel, named "ch%u", where %u is the
   9   channel number ranging from zero to the number of channels minus one.
  10 - clocks: a list of phandle + clock-specifier pairs.
  11 - #dma-cells: must be <1>, the cell specifies the channel number of the DMAC
  12   port connected to the DMA client.
  13 - dma-channels: number of DMA channels
  14
  15 Example: R8A7790 (R-Car H2) USB-DMACs
  16
  17         usb_dmac0: dma-controller@e65a0000 {
  18                 compatible = "renesas,usb-dmac";
  19                 reg = <0 0xe65a0000 0 0x100>;
  20                 interrupts = <0 109 IRQ_TYPE_LEVEL_HIGH
  21                               0 109 IRQ_TYPE_LEVEL_HIGH>;
  22                 interrupt-names = "ch0", "ch1";
  23                 clocks = <&mstp3_clks R8A7790_CLK_USBDMAC0>;
  24                 #dma-cells = <1>;
  25                 dma-channels = <2>;
  26         };
  27
  28         usb_dmac1: dma-controller@e65b0000 {
  29                 compatible = "renesas,usb-dmac";
  30                 reg = <0 0xe65b0000 0 0x100>;
  31                 interrupts = <0 110 IRQ_TYPE_LEVEL_HIGH
  32                               0 110 IRQ_TYPE_LEVEL_HIGH>;
  33                 interrupt-names = "ch0", "ch1";
  34                 clocks = <&mstp3_clks R8A7790_CLK_USBDMAC1>;
  35                 #dma-cells = <1>;
  36                 dma-channels = <2>;
  37         };