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,r8a7745-usb-dmac" (RZ/G1E)
   8           - "renesas,r8a7790-usb-dmac" (R-Car H2)
   9           - "renesas,r8a7791-usb-dmac" (R-Car M2-W)
  10           - "renesas,r8a7793-usb-dmac" (R-Car M2-N)
  11           - "renesas,r8a7794-usb-dmac" (R-Car E2)
  12           - "renesas,r8a7795-usb-dmac" (R-Car H3)
  13           - "renesas,r8a7796-usb-dmac" (R-Car M3-W)
  14 - reg: base address and length of the registers block for the DMAC
  15 - interrupts: interrupt specifiers for the DMAC, one for each entry in
  16   interrupt-names.
  17 - interrupt-names: one entry per channel, named "ch%u", where %u is the
  18   channel number ranging from zero to the number of channels minus one.
  19 - clocks: a list of phandle + clock-specifier pairs.
  20 - #dma-cells: must be <1>, the cell specifies the channel number of the DMAC
  21   port connected to the DMA client.
  22 - dma-channels: number of DMA channels
  23
  24 Example: R8A7790 (R-Car H2) USB-DMACs
  25
  26         usb_dmac0: dma-controller@e65a0000 {
  27                 compatible = "renesas,r8a7790-usb-dmac", "renesas,usb-dmac";
  28                 reg = <0 0xe65a0000 0 0x100>;
  29                 interrupts = <0 109 IRQ_TYPE_LEVEL_HIGH
  30                               0 109 IRQ_TYPE_LEVEL_HIGH>;
  31                 interrupt-names = "ch0", "ch1";
  32                 clocks = <&mstp3_clks R8A7790_CLK_USBDMAC0>;
  33                 #dma-cells = <1>;
  34                 dma-channels = <2>;
  35         };
  36
  37         usb_dmac1: dma-controller@e65b0000 {
  38                 compatible = "renesas,usb-dmac";
  39                 reg = <0 0xe65b0000 0 0x100>;
  40                 interrupts = <0 110 IRQ_TYPE_LEVEL_HIGH
  41                               0 110 IRQ_TYPE_LEVEL_HIGH>;
  42                 interrupt-names = "ch0", "ch1";
  43                 clocks = <&mstp3_clks R8A7790_CLK_USBDMAC1>;
  44                 #dma-cells = <1>;
  45                 dma-channels = <2>;
  46         };