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 - 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 - companion: phandle of a companion 26 - hnp-disable: tells OTG controllers we want to disable OTG HNP, normally HNP 27 is the basic function of real OTG except you want it 28 to be a srp-capable only B device. 29 - srp-disable: tells OTG controllers we want to disable OTG SRP, SRP is 30 optional for OTG device. 31 - adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is 32 optional for OTG device. 33 - usb-role-switch: boolean, indicates that the device is capable of assigning 34 the USB data role (USB host or USB device) for a given 35 USB connector, such as Type-C, Type-B(micro). 36 see connector/usb-connector.txt. 37 38This is an attribute to a USB controller such as: 39 40dwc3@4a030000 { 41 compatible = "synopsys,dwc3"; 42 reg = <0x4a030000 0xcfff>; 43 interrupts = <0 92 4> 44 usb-phy = <&usb2_phy>, <&usb3,phy>; 45 maximum-speed = "super-speed"; 46 dr_mode = "otg"; 47 phy_type = "utmi_wide"; 48 otg-rev = <0x0200>; 49 adp-disable; 50}; 51