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

   1 * Renesas USB DMA Controller Device Tree bindings
   2
   3 Required Properties:
   4 -compatible: "renesas,<soctype>-usb-dmac", "renesas,usb-dmac" as fallback.
   5         Examples with soctypes are:
   6           - "renesas,r8a7743-usb-dmac" (RZ/G1M)
   7           - "renesas,r8a7744-usb-dmac" (RZ/G1N)
   8           - "renesas,r8a7745-usb-dmac" (RZ/G1E)
   9           - "renesas,r8a77470-usb-dmac" (RZ/G1C)
  10           - "renesas,r8a774a1-usb-dmac" (RZ/G2M)
  11           - "renesas,r8a774c0-usb-dmac" (RZ/G2E)
  12           - "renesas,r8a7790-usb-dmac" (R-Car H2)
  13           - "renesas,r8a7791-usb-dmac" (R-Car M2-W)
  14           - "renesas,r8a7793-usb-dmac" (R-Car M2-N)
  15           - "renesas,r8a7794-usb-dmac" (R-Car E2)
  16           - "renesas,r8a7795-usb-dmac" (R-Car H3)
  17           - "renesas,r8a7796-usb-dmac" (R-Car M3-W)
  18           - "renesas,r8a77965-usb-dmac" (R-Car M3-N)
  19           - "renesas,r8a77990-usb-dmac" (R-Car E3)
  20           - "renesas,r8a77995-usb-dmac" (R-Car D3)
  21 - reg: base address and length of the registers block for the DMAC
  22 - interrupts: interrupt specifiers for the DMAC, one for each entry in
  23   interrupt-names.
  24 - interrupt-names: one entry per channel, named "ch%u", where %u is the
  25   channel number ranging from zero to the number of channels minus one.
  26 - clocks: a list of phandle + clock-specifier pairs.
  27 - #dma-cells: must be <1>, the cell specifies the channel number of the DMAC
  28   port connected to the DMA client.
  29 - dma-channels: number of DMA channels
  30
  31 Example: R8A7790 (R-Car H2) USB-DMACs
  32
  33         usb_dmac0: dma-controller@e65a0000 {
  34                 compatible = "renesas,r8a7790-usb-dmac", "renesas,usb-dmac";
  35                 reg = <0 0xe65a0000 0 0x100>;
  36                 interrupts = <0 109 IRQ_TYPE_LEVEL_HIGH
  37                               0 109 IRQ_TYPE_LEVEL_HIGH>;
  38                 interrupt-names = "ch0", "ch1";
  39                 clocks = <&mstp3_clks R8A7790_CLK_USBDMAC0>;
  40                 #dma-cells = <1>;
  41                 dma-channels = <2>;
  42         };
  43
  44         usb_dmac1: dma-controller@e65b0000 {
  45                 compatible = "renesas,usb-dmac";
  46                 reg = <0 0xe65b0000 0 0x100>;
  47                 interrupts = <0 110 IRQ_TYPE_LEVEL_HIGH
  48                               0 110 IRQ_TYPE_LEVEL_HIGH>;
  49                 interrupt-names = "ch0", "ch1";
  50                 clocks = <&mstp3_clks R8A7790_CLK_USBDMAC1>;
  51                 #dma-cells = <1>;
  52                 dma-channels = <2>;
  53         };