'\" t
.\"     Title: usb_gadget_vbus_connect
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: Kernel Mode Gadget API
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "USB_GADGET_VBUS_CONN" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Kernel Mode Gadget API"
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.SH "NAME"
usb_gadget_vbus_connect \- Notify controller that VBUS is powered
.SH "SYNOPSIS"
.HP \w'int\ usb_gadget_vbus_connect('u
.BI "int usb_gadget_vbus_connect(struct\ usb_gadget\ *\ " "gadget" ");"
.SH "ARGUMENTS"
.PP
\fIgadget\fR
.RS 4
The device which now has VBUS power\&.
.RE
.SH "CONTEXT"
.PP
can sleep
.SH "DESCRIPTION"
.PP
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)\&.
.PP
Returns zero on success, else negative errno\&.
.SH "AUTHOR"
.PP
\fBDavid Brownell\fR <\&dbrownell@users.sourceforge.net\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br