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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>device_add</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Device Drivers" /><link rel="up" href="ch02.html#id2617423" title="Device Drivers Base" /><link rel="prev" href="re182.html" title="dev_set_name" /><link rel="next" href="re184.html" title="device_register" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>device_add</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re182.html">Prev</a> </td><th width="60%" align="center">Device Drivers Base</th><td width="20%" align="right"> <a accesskey="n" href="re184.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="device_add"><a id="API-device-add"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>device_add —
add device to device hierarchy.
</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">device_add </b>(</code></td><td>struct device * <var class="pdparam">dev</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2620198"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
device.
</p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2620224"></a><h2>Description</h2><p>
This is part 2 of <code class="function">device_register</code>, though may be called
separately _iff_ <code class="function">device_initialize</code> has been called separately.
</p><p>
This adds <em class="parameter"><code>dev</code></em> to the kobject hierarchy via <code class="function">kobject_add</code>, adds it
to the global and sibling lists for the device, then
adds it to the other relevant subsystems of the driver model.
</p></div><div class="refsect1" title="NOTE"><a id="id2620265"></a><h2>NOTE</h2><p>
_Never_ directly free <em class="parameter"><code>dev</code></em> after calling this function, even
if it returned an error! Always use <code class="function">put_device</code> to give up your
reference instead.
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