FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/pci/rcar-pci.txt

     * Renesas R-Car PCIe interface
     
     Required properties:
     compatible: "renesas,pcie-r8a7742" for the R8A7742 SoC;
                 "renesas,pcie-r8a7743" for the R8A7743 SoC;
                 "renesas,pcie-r8a7744" for the R8A7744 SoC;
                 "renesas,pcie-r8a774a1" for the R8A774A1 SoC;
                 "renesas,pcie-r8a774b1" for the R8A774B1 SoC;
                 "renesas,pcie-r8a774c0" for the R8A774C0 SoC;
                "renesas,pcie-r8a7779" for the R8A7779 SoC;
                "renesas,pcie-r8a7790" for the R8A7790 SoC;
                "renesas,pcie-r8a7791" for the R8A7791 SoC;
                "renesas,pcie-r8a7793" for the R8A7793 SoC;
                "renesas,pcie-r8a7795" for the R8A7795 SoC;
                "renesas,pcie-r8a7796" for the R8A77960 SoC;
                "renesas,pcie-r8a77961" for the R8A77961 SoC;
                "renesas,pcie-r8a77980" for the R8A77980 SoC;
                "renesas,pcie-r8a77990" for the R8A77990 SoC;
                "renesas,pcie-rcar-gen2" for a generic R-Car Gen2 or
                                         RZ/G1 compatible device.
                "renesas,pcie-rcar-gen3" for a generic R-Car Gen3 or
                                         RZ/G2 compatible device.
    
                When compatible with the generic version, nodes must list the
                SoC-specific version corresponding to the platform first
                followed by the generic version.
    
    - reg: base address and length of the PCIe controller registers.
    - #address-cells: set to <3>
    - #size-cells: set to <2>
    - bus-range: PCI bus numbers covered
    - device_type: set to "pci"
    - ranges: ranges for the PCI memory and I/O regions.
    - dma-ranges: ranges for the inbound memory regions.
    - interrupts: two interrupt sources for MSI interrupts, followed by interrupt
            source for hardware related interrupts (e.g. link speed change).
    - #interrupt-cells: set to <1>
    - interrupt-map-mask and interrupt-map: standard PCI properties
            to define the mapping of the PCIe interface to interrupt numbers.
    - clocks: from common clock binding: clock specifiers for the PCIe controller
            and PCIe bus clocks.
    - clock-names: from common clock binding: should be "pcie" and "pcie_bus".
    
    Optional properties:
    - phys: from common PHY binding: PHY phandle and specifier (only make sense
            for R-Car gen3 SoCs where the PCIe PHYs have their own register blocks).
    - phy-names: from common PHY binding: should be "pcie".
    
    Example:
    
    SoC-specific DT Entry:
    
            pcie: pcie@fe000000 {
                    compatible = "renesas,pcie-r8a7791", "renesas,pcie-rcar-gen2";
                    reg = <0 0xfe000000 0 0x80000>;
                    #address-cells = <3>;
                    #size-cells = <2>;
                    bus-range = <0x00 0xff>;
                    device_type = "pci";
                    ranges = <0x01000000 0 0x00000000 0 0xfe100000 0 0x00100000
                              0x02000000 0 0xfe200000 0 0xfe200000 0 0x00200000
                              0x02000000 0 0x30000000 0 0x30000000 0 0x08000000
                              0x42000000 0 0x38000000 0 0x38000000 0 0x08000000>;
                    dma-ranges = <0x42000000 0 0x40000000 0 0x40000000 0 0x40000000
                                  0x42000000 2 0x00000000 2 0x00000000 0 0x40000000>;
                    interrupts = <0 116 4>, <0 117 4>, <0 118 4>;
                    #interrupt-cells = <1>;
                    interrupt-map-mask = <0 0 0 0>;
                    interrupt-map = <0 0 0 0 &gic 0 116 4>;
                    clocks = <&mstp3_clks R8A7791_CLK_PCIE>, <&pcie_bus_clk>;
                    clock-names = "pcie", "pcie_bus";
            };

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