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Diffstat (limited to 'Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt b/Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt new file mode 100644 index 000000000000..040f365954cc --- /dev/null +++ b/Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt @@ -0,0 +1,37 @@ +* Renesas USB DMA Controller Device Tree bindings + +Required Properties: +- compatible: must contain "renesas,usb-dmac" +- reg: base address and length of the registers block for the DMAC +- interrupts: interrupt specifiers for the DMAC, one for each entry in + interrupt-names. +- interrupt-names: one entry per channel, named "ch%u", where %u is the + channel number ranging from zero to the number of channels minus one. +- clocks: a list of phandle + clock-specifier pairs. +- #dma-cells: must be <1>, the cell specifies the channel number of the DMAC + port connected to the DMA client. +- dma-channels: number of DMA channels + +Example: R8A7790 (R-Car H2) USB-DMACs + + usb_dmac0: dma-controller@e65a0000 { + compatible = "renesas,usb-dmac"; + reg = <0 0xe65a0000 0 0x100>; + interrupts = <0 109 IRQ_TYPE_LEVEL_HIGH + 0 109 IRQ_TYPE_LEVEL_HIGH>; + interrupt-names = "ch0", "ch1"; + clocks = <&mstp3_clks R8A7790_CLK_USBDMAC0>; + #dma-cells = <1>; + dma-channels = <2>; + }; + + usb_dmac1: dma-controller@e65b0000 { + compatible = "renesas,usb-dmac"; + reg = <0 0xe65b0000 0 0x100>; + interrupts = <0 110 IRQ_TYPE_LEVEL_HIGH + 0 110 IRQ_TYPE_LEVEL_HIGH>; + interrupt-names = "ch0", "ch1"; + clocks = <&mstp3_clks R8A7790_CLK_USBDMAC1>; + #dma-cells = <1>; + dma-channels = <2>; + }; |