tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1* Renesas USB DMA Controller Device Tree bindings
2
3Required 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
24Example: 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 };