mirror of https://gitee.com/openkylin/linux.git
83 lines
2.6 KiB
Plaintext
83 lines
2.6 KiB
Plaintext
Renesas AHB to PCI bridge
|
|
-------------------------
|
|
|
|
This is the bridge used internally to connect the USB controllers to the
|
|
AHB. There is one bridge instance per USB port connected to the internal
|
|
OHCI and EHCI controllers.
|
|
|
|
Required properties:
|
|
- compatible: "renesas,pci-r8a7743" for the R8A7743 SoC;
|
|
"renesas,pci-r8a7745" for the R8A7745 SoC;
|
|
"renesas,pci-r8a7790" for the R8A7790 SoC;
|
|
"renesas,pci-r8a7791" for the R8A7791 SoC;
|
|
"renesas,pci-r8a7793" for the R8A7793 SoC;
|
|
"renesas,pci-r8a7794" for the R8A7794 SoC;
|
|
"renesas,pci-rcar-gen2" for a generic R-Car Gen2 or
|
|
RZ/G1 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: A list of physical regions to access the device: the first is
|
|
the operational registers for the OHCI/EHCI controllers and the
|
|
second is for the bridge configuration and control registers.
|
|
- interrupts: interrupt for the device.
|
|
- clocks: The reference to the device clock.
|
|
- bus-range: The PCI bus number range; as this is a single bus, the range
|
|
should be specified as the same value twice.
|
|
- #address-cells: must be 3.
|
|
- #size-cells: must be 2.
|
|
- #interrupt-cells: must be 1.
|
|
- interrupt-map: standard property used to define the mapping of the PCI
|
|
interrupts to the GIC interrupts.
|
|
- interrupt-map-mask: standard property that helps to define the interrupt
|
|
mapping.
|
|
|
|
Optional properties:
|
|
- dma-ranges: a single range for the inbound memory region. If not supplied,
|
|
defaults to 1GiB at 0x40000000. Note there are hardware restrictions on the
|
|
allowed combinations of address and size.
|
|
|
|
Example SoC configuration:
|
|
|
|
pci0: pci@ee090000 {
|
|
compatible = "renesas,pci-r8a7790", "renesas,pci-rcar-gen2";
|
|
clocks = <&mstp7_clks R8A7790_CLK_EHCI>;
|
|
reg = <0x0 0xee090000 0x0 0xc00>,
|
|
<0x0 0xee080000 0x0 0x1100>;
|
|
interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>;
|
|
status = "disabled";
|
|
|
|
bus-range = <0 0>;
|
|
#address-cells = <3>;
|
|
#size-cells = <2>;
|
|
#interrupt-cells = <1>;
|
|
dma-ranges = <0x42000000 0 0x40000000 0 0x40000000 0 0x40000000>;
|
|
interrupt-map-mask = <0xff00 0 0 0x7>;
|
|
interrupt-map = <0x0000 0 0 1 &gic 0 108 IRQ_TYPE_LEVEL_HIGH
|
|
0x0800 0 0 1 &gic 0 108 IRQ_TYPE_LEVEL_HIGH
|
|
0x1000 0 0 2 &gic 0 108 IRQ_TYPE_LEVEL_HIGH>;
|
|
|
|
usb@1,0 {
|
|
reg = <0x800 0 0 0 0>;
|
|
phys = <&usb0 0>;
|
|
phy-names = "usb";
|
|
};
|
|
|
|
usb@2,0 {
|
|
reg = <0x1000 0 0 0 0>;
|
|
phys = <&usb0 0>;
|
|
phy-names = "usb";
|
|
};
|
|
};
|
|
|
|
Example board setup:
|
|
|
|
&pci0 {
|
|
status = "okay";
|
|
pinctrl-0 = <&usb0_pins>;
|
|
pinctrl-names = "default";
|
|
};
|