| Ben Dooks | d47b62f | 2014-05-20 01:10:20 +0400 | [diff] [blame] | 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; |
| Sergei Shtylyov | de24c18 | 2015-09-12 02:06:09 +0300 | [diff] [blame] | 10 | "renesas,pci-r8a7791" for the R8A7791 SoC; |
| 11 | "renesas,pci-r8a7794" for the R8A7794 SoC. |
| Ben Dooks | d47b62f | 2014-05-20 01:10:20 +0400 | [diff] [blame] | 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 | |
| 27 | Example 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 | |
| 61 | Example board setup: |
| 62 | |
| 63 | &pci0 { |
| 64 | status = "okay"; |
| 65 | pinctrl-0 = <&usb0_pins>; |
| 66 | pinctrl-names = "default"; |
| 67 | }; |