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Documentation / devicetree / bindings / usb / generic.txt




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Based on kernel version 4.9. Page generated on 2016-12-21 14:33 EST.

1	Generic USB Properties
2	
3	Optional 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	 - phy_type: tells USB controllers that we want to configure the core to support
15				a UTMI+ PHY with an 8- or 16-bit interface if UTMI+ is
16				selected. Valid arguments are "utmi" and "utmi_wide".
17				In case this isn't passed via DT, USB controllers should
18				default to HW capability.
19	 - otg-rev: tells usb driver the release number of the OTG and EH supplement
20				with which the device and its descriptors are compliant,
21				in binary-coded decimal (i.e. 2.0 is 0200H). This
22				property is used if any real OTG features(HNP/SRP/ADP)
23				is enabled, if ADP is required, otg-rev should be
24				0x0200 or above.
25	 - hnp-disable: tells OTG controllers we want to disable OTG HNP, normally HNP
26				is the basic function of real OTG except you want it
27				to be a srp-capable only B device.
28	 - srp-disable: tells OTG controllers we want to disable OTG SRP, SRP is
29				optional for OTG device.
30	 - adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is
31				optional for OTG device.
32	
33	This is an attribute to a USB controller such as:
34	
35	dwc3@4a030000 {
36		compatible = "synopsys,dwc3";
37		reg = <0x4a030000 0xcfff>;
38		interrupts = <0 92 4>
39		usb-phy = <&usb2_phy>, <&usb3,phy>;
40		maximum-speed = "super-speed";
41		dr_mode = "otg";
42		phy_type = "utmi_wide";
43		otg-rev = <0x0200>;
44		adp-disable;
45	};
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