1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>usb_function_activate</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="USB Gadget API for Linux"><link rel="up" href="composite.html" title="Composite Device Framework"><link rel="prev" href="API-usb-function-deactivate.html" title="usb_function_deactivate"><link rel="next" href="API-usb-interface-id.html" title="usb_interface_id"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">usb_function_activate</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-usb-function-deactivate.html">Prev</a>&#160;</td><th width="60%" align="center">Composite Device Framework</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-usb-interface-id.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-usb-function-activate"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>usb_function_activate &#8212; 
2     allow function and gadget enumeration
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">usb_function_activate </b>(</code></td><td>struct usb_function * <var class="pdparam">function</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1124422812"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>function</code></em></span></dt><dd><p>
4     function on which <code class="function">usb_function_activate</code> was called
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1124424652"></a><h2>Description</h2><p>
6   Reverses effect of <code class="function">usb_function_deactivate</code>.  If no more functions
7   are delaying their activation, the gadget driver will respond to
8   host enumeration procedures.
9   </p><p>
10
11   Returns zero on success, else negative errno.
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