Documentation/devicetree/bindings/pci/pci-rcar-gen2.txt

   1 Renesas AHB to PCI bridge
   2 -------------------------
   3
   4 This is the bridge used internally to connect the USB controllers to the
   5 AHB. There is one bridge instance per USB port connected to the internal
   6 OHCI and EHCI controllers.
   7
   8 Required properties:
   9 - compatible: "renesas,pci-r8a7790" for the R8A7790 SoC;
  10               "renesas,pci-r8a7791" for the R8A7791 SoC.
  11 - reg:  A list of physical regions to access the device: the first is
  12         the operational registers for the OHCI/EHCI controllers and the
  13         second is for the bridge configuration and control registers.
  14 - interrupts: interrupt for the device.
  15 - clocks: The reference to the device clock.
  16 - bus-range: The PCI bus number range; as this is a single bus, the range
  17              should be specified as the same value twice.
  18 - #address-cells: must be 3.
  19 - #size-cells: must be 2.
  20 - #interrupt-cells: must be 1.
  21 - interrupt-map: standard property used to define the mapping of the PCI
  22   interrupts to the GIC interrupts.
  23 - interrupt-map-mask: standard property that helps to define the interrupt
  24   mapping.
  25
  26 Example SoC configuration:
  27
  28         pci0: pci@ee090000  {
  29                 compatible = "renesas,pci-r8a7790";
  30                 clocks = <&mstp7_clks R8A7790_CLK_EHCI>;
  31                 reg = <0x0 0xee090000 0x0 0xc00>,
  32                       <0x0 0xee080000 0x0 0x1100>;
  33                 interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>;
  34                 status = "disabled";
  35
  36                 bus-range = <0 0>;
  37                 #address-cells = <3>;
  38                 #size-cells = <2>;
  39                 #interrupt-cells = <1>;
  40                 interrupt-map-mask = <0xff00 0 0 0x7>;
  41                 interrupt-map = <0x0000 0 0 1 &gic 0 108 IRQ_TYPE_LEVEL_HIGH
  42                                  0x0800 0 0 1 &gic 0 108 IRQ_TYPE_LEVEL_HIGH
  43                                  0x1000 0 0 2 &gic 0 108 IRQ_TYPE_LEVEL_HIGH>;
  44
  45                 pci@0,1 {
  46                         reg = <0x800 0 0 0 0>;
  47                         device_type = "pci";
  48                         phys = <&usbphy 0 0>;
  49                         phy-names = "usb";
  50                 };
  51
  52                 pci@0,2 {
  53                         reg = <0x1000 0 0 0 0>;
  54                         device_type = "pci";
  55                         phys = <&usbphy 0 0>;
  56                         phy-names = "usb";
  57                 };
  58         };
  59
  60 Example board setup:
  61
  62 &pci0 {
  63         status = "okay";
  64         pinctrl-0 = <&usb0_pins>;
  65         pinctrl-names = "default";
  66 };