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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>usb_gadget_vbus_connect</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="USB Gadget API for Linux" /><link rel="up" href="ch03s03.html" title="Core Objects and Methods" /><link rel="prev" href="re35.html" title="usb_gadget_clear_selfpowered" /><link rel="next" href="re37.html" title="usb_gadget_vbus_draw" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>usb_gadget_vbus_connect</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re35.html">Prev</a> </td><th width="60%" align="center">Core Objects and Methods</th><td width="20%" align="right"> <a accesskey="n" href="re37.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="usb_gadget_vbus_connect"><a id="API-usb-gadget-vbus-connect"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>usb_gadget_vbus_connect —
Notify controller that VBUS is powered
</p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">int <b class="fsfunc">usb_gadget_vbus_connect </b>(</code></td><td>struct usb_gadget * <var class="pdparam">gadget</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2995326"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>gadget</code></em></span></dt><dd><p>
The device which now has VBUS power.
</p></dd></dl></div></div><div class="refsect1" title="Context"><a id="id2995352"></a><h2>Context</h2><p>
can sleep
</p></div><div class="refsect1" title="Description"><a id="id2995362"></a><h2>Description</h2><p>
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).
</p><p>
Returns zero on success, else negative errno.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re35.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch03s03.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re37.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>usb_gadget_clear_selfpowered</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>usb_gadget_vbus_draw</span></td></tr></table></div></body></html>
