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