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Generic USB Properties
Optional properties:
- maximum-speed: tells USB controllers we want to work up to a certain
speed. Valid arguments are "super-speed", "high-speed",
"full-speed" and "low-speed". In case this isn't passed
via DT, USB controllers should default to their maximum
HW capability.
- dr_mode: tells Dual-Role USB controllers that we want to work on a
particular mode. Valid arguments are "host",
"peripheral" and "otg". In case this attribute isn't
passed via DT, USB DRD controllers should default to
OTG.
This is an attribute to a USB controller such as:
dwc3@4a030000 {
compatible = "synopsys,dwc3";
reg = <0x4a030000 0xcfff>;
interrupts = <0 92 4>
usb-phy = <&usb2_phy>, <&usb3,phy>;
maximum-speed = "super-speed";
dr_mode = "otg";
};
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