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