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1Renesas AHB to PCI bridge
2-------------------------
3
4This is the bridge used internally to connect the USB controllers to the
5AHB. There is one bridge instance per USB port connected to the internal
6OHCI and EHCI controllers.
7
8Required properties:
9- compatible: "renesas,pci-r8a7790" for the R8A7790 SoC;
10	      "renesas,pci-r8a7791" for the R8A7791 SoC;
11	      "renesas,pci-r8a7794" for the R8A7794 SoC.
12- reg:	A list of physical regions to access the device: the first is
13	the operational registers for the OHCI/EHCI controllers and the
14	second is for the bridge configuration and control registers.
15- interrupts: interrupt for the device.
16- clocks: The reference to the device clock.
17- bus-range: The PCI bus number range; as this is a single bus, the range
18	     should be specified as the same value twice.
19- #address-cells: must be 3.
20- #size-cells: must be 2.
21- #interrupt-cells: must be 1.
22- interrupt-map: standard property used to define the mapping of the PCI
23  interrupts to the GIC interrupts.
24- interrupt-map-mask: standard property that helps to define the interrupt
25  mapping.
26
27Example SoC configuration:
28
29	pci0: pci@ee090000  {
30		compatible = "renesas,pci-r8a7790";
31		clocks = <&mstp7_clks R8A7790_CLK_EHCI>;
32		reg = <0x0 0xee090000 0x0 0xc00>,
33		      <0x0 0xee080000 0x0 0x1100>;
34		interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>;
35		status = "disabled";
36
37		bus-range = <0 0>;
38		#address-cells = <3>;
39		#size-cells = <2>;
40		#interrupt-cells = <1>;
41		interrupt-map-mask = <0xff00 0 0 0x7>;
42		interrupt-map = <0x0000 0 0 1 &gic 0 108 IRQ_TYPE_LEVEL_HIGH
43				 0x0800 0 0 1 &gic 0 108 IRQ_TYPE_LEVEL_HIGH
44				 0x1000 0 0 2 &gic 0 108 IRQ_TYPE_LEVEL_HIGH>;
45
46		pci@0,1 {
47			reg = <0x800 0 0 0 0>;
48			device_type = "pci";
49			phys = <&usbphy 0 0>;
50			phy-names = "usb";
51		};
52
53		pci@0,2 {
54			reg = <0x1000 0 0 0 0>;
55			device_type = "pci";
56			phys = <&usbphy 0 0>;
57			phy-names = "usb";
58		};
59	};
60
61Example board setup:
62
63&pci0 {
64	status = "okay";
65	pinctrl-0 = <&usb0_pins>;
66	pinctrl-names = "default";
67};
68