Commit | Line | Data |
---|---|---|
d47b62f4 BD |
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 | }; |