doc/device-tree-bindings/usb/generic.txt

   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-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
  21 This is an attribute to a USB controller such as:
  22
  23 dwc3@4a030000 {
  24         compatible = "synopsys,dwc3";
  25         reg = <0x4a030000 0xcfff>;
  26         interrupts = <0 92 4>
  27         usb-phy = <&usb2_phy>, <&usb3,phy>;
  28         maximum-speed = "super-speed";
  29         dr_mode = "otg";
  30         phy_type = "utmi_wide";
  31 };