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