1Generic USB Properties
2
3Optional properties:
4 - maximum-speed: tells USB controllers we want to work up to a certain
5			speed. Valid arguments are "super-speed", "high-speed",
6			"full-speed" and "low-speed". In case this isn't passed
7			via DT, USB controllers should default to their maximum
8			HW capability.
9 - dr_mode: tells Dual-Role USB controllers that we want to work on a
10			particular mode. Valid arguments are "host",
11			"peripheral" and "otg". In case this attribute isn't
12			passed via DT, USB DRD controllers should default to
13			OTG.
14 - otg-rev: tells usb driver the release number of the OTG and EH supplement
15			with which the device and its descriptors are compliant,
16			in binary-coded decimal (i.e. 2.0 is 0200H). This
17			property is used if any real OTG features(HNP/SRP/ADP)
18			is enabled, if ADP is required, otg-rev should be
19			0x0200 or above.
20 - hnp-disable: tells OTG controllers we want to disable OTG HNP, normally HNP
21			is the basic function of real OTG except you want it
22			to be a srp-capable only B device.
23 - srp-disable: tells OTG controllers we want to disable OTG SRP, SRP is
24			optional for OTG device.
25 - adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is
26			optional for OTG device.
27
28This is an attribute to a USB controller such as:
29
30dwc3@4a030000 {
31	compatible = "synopsys,dwc3";
32	reg = <0x4a030000 0xcfff>;
33	interrupts = <0 92 4>
34	usb-phy = <&usb2_phy>, <&usb3,phy>;
35	maximum-speed = "super-speed";
36	dr_mode = "otg";
37	otg-rev = <0x0200>;
38	adp-disable;
39};
40