'\" t
.\"     Title: usb_gadget_disconnect
.\"    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_DISCONNEC" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "Kernel Mode Gadget API"
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.SH "NAME"
usb_gadget_disconnect \- software\-controlled disconnect from USB host
.SH "SYNOPSIS"
.HP \w'int\ usb_gadget_disconnect('u
.BI "int usb_gadget_disconnect(struct\ usb_gadget\ *\ " "gadget" ");"
.SH "ARGUMENTS"
.PP
\fIgadget\fR
.RS 4
the peripheral being disconnected
.RE
.SH "DESCRIPTION"
.PP
Disables the D+ (or potentially D\-) pullup, which the host may see as a disconnect (when a VBUS session is active)\&. Not all systems support software pullup controls\&.
.PP
This routine may be used during the gadget driver
\fBbind\fR
call to prevent the peripheral from ever being visible to the USB host, unless later
\fBusb_gadget_connect\fR
is called\&. For example, user mode components may need to be activated before the system can talk to hosts\&.
.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