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USB_GADGET_VBUS_DRAW(9) | Kernel Mode Gadget API | USB_GADGET_VBUS_DRAW(9) |
NAME¶
usb_gadget_vbus_draw - constrain controller's VBUS power usageSYNOPSIS¶
int
usb_gadget_vbus_draw(struct usb_gadget * gadget,
unsigned mA);
ARGUMENTS¶
gadgetThe 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¶
March 2016 | Kernel Hackers Manual 3.2. |