1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>alloc_chrdev_region</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux Kernel API"><link rel="up" href="chrdev.html" title="Chapter&#160;15.&#160;Char devices"><link rel="prev" href="API-register-chrdev-region.html" title="register_chrdev_region"><link rel="next" href="API---register-chrdev.html" title="__register_chrdev"></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">alloc_chrdev_region</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-register-chrdev-region.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;15.&#160;Char devices</th><td width="20%" align="right">&#160;<a accesskey="n" href="API---register-chrdev.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-alloc-chrdev-region"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>alloc_chrdev_region &#8212; 
2     register a range of char device numbers
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">alloc_chrdev_region </b>(</code></td><td>dev_t * <var class="pdparam">dev</var>, </td></tr><tr><td>&#160;</td><td>unsigned <var class="pdparam">baseminor</var>, </td></tr><tr><td>&#160;</td><td>unsigned <var class="pdparam">count</var>, </td></tr><tr><td>&#160;</td><td>const char * <var class="pdparam">name</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1129083884"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>dev</code></em></span></dt><dd><p>
4     output parameter for first assigned number
5    </p></dd><dt><span class="term"><em class="parameter"><code>baseminor</code></em></span></dt><dd><p>
6     first of the requested range of minor numbers
7    </p></dd><dt><span class="term"><em class="parameter"><code>count</code></em></span></dt><dd><p>
8     the number of minor numbers required
9    </p></dd><dt><span class="term"><em class="parameter"><code>name</code></em></span></dt><dd><p>
10     the name of the associated device or driver
11    </p></dd></dl></div></div><div class="refsect1"><a name="idp1129088644"></a><h2>Description</h2><p>
12   Allocates a range of char device numbers.  The major number will be
13   chosen dynamically, and returned (along with the first minor number)
14   in <em class="parameter"><code>dev</code></em>.  Returns zero or a negative error code.
15</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-chrdev-region.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="chrdev.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API---register-chrdev.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">register_chrdev_region</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_chrdev</span></td></tr></table></div></body></html>
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