generic.txt

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    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  - 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 
   45 This is an attribute to a USB controller such as:
   46 
   47 dwc3@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 };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/usb/generic.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/usb/generic.txt