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-Generic USB Properties
-
-Optional properties:
- - maximum-speed: tells USB controllers we want to work up to a certain
- speed. Valid arguments are "super-speed-plus",
- "super-speed", "high-speed", "full-speed" and
- "low-speed". In case this isn't passed via DT, USB
- controllers should default to their maximum HW
- capability.
- - dr_mode: tells Dual-Role USB controllers that we want to work on a
- particular mode. Valid arguments are "host",
- "peripheral" and "otg". In case this attribute isn't
- passed via DT, USB DRD controllers should default to
- OTG.
- - phy_type: tells USB controllers that we want to configure the core to support
- a UTMI+ PHY with an 8- or 16-bit interface if UTMI+ is
- selected. Valid arguments are "utmi" and "utmi_wide".
- In case this isn't passed via DT, USB controllers should
- default to HW capability.
- - otg-rev: tells usb driver the release number of the OTG and EH supplement
- with which the device and its descriptors are compliant,
- in binary-coded decimal (i.e. 2.0 is 0200H). This
- property is used if any real OTG features(HNP/SRP/ADP)
- is enabled, if ADP is required, otg-rev should be
- 0x0200 or above.
- - companion: phandle of a companion
- - hnp-disable: tells OTG controllers we want to disable OTG HNP, normally HNP
- is the basic function of real OTG except you want it
- to be a srp-capable only B device.
- - srp-disable: tells OTG controllers we want to disable OTG SRP, SRP is
- optional for OTG device.
- - adp-disable: tells OTG controllers we want to disable OTG ADP, ADP is
- optional for OTG device.
- - usb-role-switch: boolean, indicates that the device is capable of assigning
- the USB data role (USB host or USB device) for a given
- USB connector, such as Type-C, Type-B(micro).
- see connector/usb-connector.yaml.
- - role-switch-default-mode: indicating if usb-role-switch is enabled, the
- device default operation mode of controller while usb
- role is USB_ROLE_NONE. Valid arguments are "host" and
- "peripheral". Defaults to "peripheral" if not
- specified.
-
-
-This is an attribute to a USB controller such as:
-
-dwc3@4a030000 {
- compatible = "synopsys,dwc3";
- reg = <0x4a030000 0xcfff>;
- interrupts = <0 92 4>
- usb-phy = <&usb2_phy>, <&usb3,phy>;
- maximum-speed = "super-speed";
- dr_mode = "otg";
- phy_type = "utmi_wide";
- otg-rev = <0x0200>;
- adp-disable;
-};