| USB_GADGET_VBUS_DRAW(9) | Kernel Mode Gadget API | USB_GADGET_VBUS_DRAW(9) |
NAME¶
usb_gadget_vbus_draw - constrain controller´s VBUS power usage
SYNOPSIS¶
int usb_gadget_vbus_draw(struct usb_gadget * gadget, unsigned mA);
ARGUMENTS¶
gadget
The device whose VBUS usage is being described
mA
How much current to draw, in milliAmperes. This should be
twice the value listed in the configuration descriptor bMaxPower field.
DESCRIPTION¶
This call is used by gadget drivers during SET_CONFIGURATION calls, reporting how much power the device may consume. For example, this could affect how quickly batteries are recharged.
Returns zero on success, else negative errno.
AUTHOR¶
David Brownell <dbrownell@users.sourceforge.net>
Author.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |