tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1* Renesas R-Car PCIe interface
2
3Required properties:
4compatible: "renesas,pcie-r8a7743" for the R8A7743 SoC;
5 "renesas,pcie-r8a7744" for the R8A7744 SoC;
6 "renesas,pcie-r8a7779" for the R8A7779 SoC;
7 "renesas,pcie-r8a7790" for the R8A7790 SoC;
8 "renesas,pcie-r8a7791" for the R8A7791 SoC;
9 "renesas,pcie-r8a7793" for the R8A7793 SoC;
10 "renesas,pcie-r8a7795" for the R8A7795 SoC;
11 "renesas,pcie-r8a7796" for the R8A7796 SoC;
12 "renesas,pcie-r8a77980" for the R8A77980 SoC;
13 "renesas,pcie-r8a77990" for the R8A77990 SoC;
14 "renesas,pcie-rcar-gen2" for a generic R-Car Gen2 or
15 RZ/G1 compatible device.
16 "renesas,pcie-rcar-gen3" for a generic R-Car Gen3 compatible device.
17
18 When compatible with the generic version, nodes must list the
19 SoC-specific version corresponding to the platform first
20 followed by the generic version.
21
22- reg: base address and length of the PCIe controller registers.
23- #address-cells: set to <3>
24- #size-cells: set to <2>
25- bus-range: PCI bus numbers covered
26- device_type: set to "pci"
27- ranges: ranges for the PCI memory and I/O regions.
28- dma-ranges: ranges for the inbound memory regions.
29- interrupts: two interrupt sources for MSI interrupts, followed by interrupt
30 source for hardware related interrupts (e.g. link speed change).
31- #interrupt-cells: set to <1>
32- interrupt-map-mask and interrupt-map: standard PCI properties
33 to define the mapping of the PCIe interface to interrupt numbers.
34- clocks: from common clock binding: clock specifiers for the PCIe controller
35 and PCIe bus clocks.
36- clock-names: from common clock binding: should be "pcie" and "pcie_bus".
37
38Optional properties:
39- phys: from common PHY binding: PHY phandle and specifier (only make sense
40 for R-Car gen3 SoCs where the PCIe PHYs have their own register blocks).
41- phy-names: from common PHY binding: should be "pcie".
42
43Example:
44
45SoC-specific DT Entry:
46
47 pcie: pcie@fe000000 {
48 compatible = "renesas,pcie-r8a7791", "renesas,pcie-rcar-gen2";
49 reg = <0 0xfe000000 0 0x80000>;
50 #address-cells = <3>;
51 #size-cells = <2>;
52 bus-range = <0x00 0xff>;
53 device_type = "pci";
54 ranges = <0x01000000 0 0x00000000 0 0xfe100000 0 0x00100000
55 0x02000000 0 0xfe200000 0 0xfe200000 0 0x00200000
56 0x02000000 0 0x30000000 0 0x30000000 0 0x08000000
57 0x42000000 0 0x38000000 0 0x38000000 0 0x08000000>;
58 dma-ranges = <0x42000000 0 0x40000000 0 0x40000000 0 0x40000000
59 0x42000000 2 0x00000000 2 0x00000000 0 0x40000000>;
60 interrupts = <0 116 4>, <0 117 4>, <0 118 4>;
61 #interrupt-cells = <1>;
62 interrupt-map-mask = <0 0 0 0>;
63 interrupt-map = <0 0 0 0 &gic 0 116 4>;
64 clocks = <&mstp3_clks R8A7791_CLK_PCIE>, <&pcie_bus_clk>;
65 clock-names = "pcie", "pcie_bus";
66 };