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-plus",
6			"super-speed", "high-speed", "full-speed" and
7			"low-speed". In case this isn't passed via DT, USB
8			controllers should default to their maximum HW
9			capability.
10 - dr_mode: tells Dual-Role USB controllers that we want to work on a
11			particular mode. Valid arguments are "host",
12			"peripheral" and "otg". In case this attribute isn't
13			passed via DT, USB DRD controllers should default to
14			OTG.
15 - phy_type: tells USB controllers that we want to configure the core to support
16			a UTMI+ PHY with an 8- or 16-bit interface if UTMI+ is
17			selected. Valid arguments are "utmi" and "utmi_wide".
18			In case this isn't passed via DT, USB controllers should
19			default to HW capability.
20 - otg-rev: tells usb driver the release number of the OTG and EH supplement
21			with which the device and its descriptors are compliant,
22			in binary-coded decimal (i.e. 2.0 is 0200H). This
23			property is used if any real OTG features(HNP/SRP/ADP)
24			is enabled, if ADP is required, otg-rev should be
25			0x0200 or above.
26 - companion: phandle of a companion
27 - hnp-disable: tells OTG controllers we want to disable OTG HNP, normally HNP
28			is the basic function of real OTG except you want it
29			to be a srp-capable only B device.
30 - srp-disable: tells OTG controllers we want to disable OTG SRP, SRP is
31			optional for OTG device.
32 - adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is
33			optional for OTG device.
34 - usb-role-switch: boolean, indicates that the device is capable of assigning
35			the USB data role (USB host or USB device) for a given
36			USB connector, such as Type-C, Type-B(micro).
37			see connector/usb-connector.yaml.
38 - role-switch-default-mode: indicating if usb-role-switch is enabled, the
39			device default operation mode of controller while usb
40			role is USB_ROLE_NONE. Valid arguments are "host" and
41			"peripheral". Defaults to "peripheral" if not
42			specified.
43
44
45This is an attribute to a USB controller such as:
46
47dwc3@4a030000 {
48	compatible = "synopsys,dwc3";
49	reg = <0x4a030000 0xcfff>;
50	interrupts = <0 92 4>
51	usb-phy = <&usb2_phy>, <&usb3,phy>;
52	maximum-speed = "super-speed";
53	dr_mode = "otg";
54	phy_type = "utmi_wide";
55	otg-rev = <0x0200>;
56	adp-disable;
57};
58