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Samsung Exynos SoC USB controller
The USB devices interface with USB controllers on Exynos SOCs.
The device node has following properties.
EHCI
Required properties:
- compatible: should be "samsung,exynos4210-ehci" for USB 2.0
EHCI controller in host mode.
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: interrupt number to the cpu.
- clocks: from common clock binding: handle to usb clock.
- clock-names: from common clock binding: Shall be "usbhost".
Optional properties:
- samsung,vbus-gpio: if present, specifies the GPIO that
needs to be pulled up for the bus to be powered.
Example:
usb@12110000 {
compatible = "samsung,exynos4210-ehci";
reg = <0x12110000 0x100>;
interrupts = <0 71 0>;
samsung,vbus-gpio = <&gpx2 6 1 3 3>;
clocks = <&clock 285>;
clock-names = "usbhost";
};
OHCI
Required properties:
- compatible: should be "samsung,exynos4210-ohci" for USB 2.0
OHCI companion controller in host mode.
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: interrupt number to the cpu.
- clocks: from common clock binding: handle to usb clock.
- clock-names: from common clock binding: Shall be "usbhost".
Example:
usb@12120000 {
compatible = "samsung,exynos4210-ohci";
reg = <0x12120000 0x100>;
interrupts = <0 71 0>;
clocks = <&clock 285>;
clock-names = "usbhost";
};
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