| USB_GADGET_VBUS_CONN(9) | Kernel Mode Gadget API | USB_GADGET_VBUS_CONN(9) |
NAME¶
usb_gadget_vbus_connect - Notify controller that VBUS is powered
SYNOPSIS¶
int usb_gadget_vbus_connect(struct usb_gadget * gadget);
ARGUMENTS¶
gadget
The device which now has VBUS power.
CONTEXT¶
can sleep
DESCRIPTION¶
This call is used by a driver for an external transceiver (or GPIO) that detects a VBUS power session starting. Common responses include resuming the controller, activating the D+ (or D-) pullup to let the host detect that a USB device is attached, and starting to draw power (8mA or possibly more, especially after SET_CONFIGURATION).
Returns zero on success, else negative errno.
AUTHOR¶
David Brownell <dbrownell@users.sourceforge.net>
Author.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |