1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>register_sound_mixer</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Device Drivers"><link rel="up" href="snddev.html" title="Chapter&#160;5.&#160;Sound Devices"><link rel="prev" href="API-register-sound-special-device.html" title="register_sound_special_device"><link rel="next" href="API-register-sound-midi.html" title="register_sound_midi"></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">register_sound_mixer</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-register-sound-special-device.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;5.&#160;Sound Devices</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-register-sound-midi.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-register-sound-mixer"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>register_sound_mixer &#8212; 
2     register a mixer device
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">register_sound_mixer </b>(</code></td><td>const struct file_operations * <var class="pdparam">fops</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">dev</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1112243068"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>fops</code></em></span></dt><dd><p>
4     File operations for the driver
5    </p></dd><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
6     Unit number to allocate
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1112245700"></a><h2>Description</h2><p>
8   Allocate a mixer device. Unit is the number of the mixer requested.
9   Pass -1 to request the next free mixer unit.
10</p></div><div class="refsect1"><a name="idp1112246420"></a><h2>Return</h2><p>
11   On success, the allocated number is returned. On failure,
12   a negative error code is returned.
13</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-register-sound-special-device.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="snddev.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-register-sound-midi.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">register_sound_special_device</span>&#160;</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">&#160;<span class="phrase">register_sound_midi</span></td></tr></table></div></body></html>
14