<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><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 V1.76.1" /><link rel="home" href="index.html" title="Linux Device Drivers" /><link rel="up" href="snddev.html" title="Chapter 5. 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><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>register_sound_mixer</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-register-sound-special-device.html">Prev</a> </td><th width="60%" align="center">Chapter 5. Sound Devices</th><td width="20%" align="right"> <a accesskey="n" href="API-register-sound-midi.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="register_sound_mixer"><a id="API-register-sound-mixer"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>register_sound_mixer — register a mixer device </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 <strong>fsfuncregister_sound_mixer </strong>(</code></td><td>const struct file_operations * <var class="pdparam">fops</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">dev</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id3129078"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>fops</code></em></span></dt><dd><p> File operations for the driver </p></dd><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p> Unit number to allocate </p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id3129122"></a><h2>Description</h2><p> Allocate a mixer device. Unit is the number of the mixer requested. Pass -1 to request the next free mixer unit. On success the allocated number is returned, on failure a negative error code is returned. </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> </td><td width="20%" align="center"><a accesskey="u" href="snddev.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-register-sound-midi.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>register_sound_special_device</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>register_sound_midi</span></td></tr></table></div></body></html>