| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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", "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 | - role-switch-default-mode: indicating if usb-role-switch is enabled, the |
| 38 | device default operation mode of controller while usb |
| 39 | role is USB_ROLE_NONE. Valid arguments are "host" and |
| 40 | "peripheral". Defaults to "peripheral" if not |
| 41 | specified. |
| 42 | |
| 43 | |
| 44 | This is an attribute to a USB controller such as: |
| 45 | |
| 46 | dwc3@4a030000 { |
| 47 | compatible = "synopsys,dwc3"; |
| 48 | reg = <0x4a030000 0xcfff>; |
| 49 | interrupts = <0 92 4> |
| 50 | usb-phy = <&usb2_phy>, <&usb3,phy>; |
| 51 | maximum-speed = "super-speed"; |
| 52 | dr_mode = "otg"; |
| 53 | phy_type = "utmi_wide"; |
| 54 | otg-rev = <0x0200>; |
| 55 | adp-disable; |
| 56 | }; |