1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>request_firmware</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="ch02s02.html" title="Device Drivers Base"><link rel="prev" href="API-unregister-node.html" title="unregister_node"><link rel="next" href="API-request-firmware-direct.html" title="request_firmware_direct"></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">request_firmware</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-unregister-node.html">Prev</a>&#160;</td><th width="60%" align="center">Device Drivers Base</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-request-firmware-direct.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-request-firmware"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>request_firmware &#8212; 
2  send firmware request and wait for it
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">request_firmware </b>(</code></td><td>const struct firmware ** <var class="pdparam">firmware_p</var>, </td></tr><tr><td>&#160;</td><td>const char * <var class="pdparam">name</var>, </td></tr><tr><td>&#160;</td><td>struct device * <var class="pdparam">device</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1109643572"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>firmware_p</code></em></span></dt><dd><p>
4     pointer to firmware image
5    </p></dd><dt><span class="term"><em class="parameter"><code>name</code></em></span></dt><dd><p>
6     name of firmware file
7    </p></dd><dt><span class="term"><em class="parameter"><code>device</code></em></span></dt><dd><p>
8     device for which firmware is being loaded
9    </p></dd></dl></div></div><div class="refsect1"><a name="idp1109647228"></a><h2>Description</h2><p>
10   <em class="parameter"><code>firmware_p</code></em> will be used to return a firmware image by the name
11   of <em class="parameter"><code>name</code></em> for device <em class="parameter"><code>device</code></em>.
12   </p><p>
13
14   Should be called from user context where sleeping is allowed.
15   </p><p>
16
17   <em class="parameter"><code>name</code></em> will be used as <code class="envar">$FIRMWARE</code> in the uevent environment and
18   should be distinctive enough not to be confused with any other
19   firmware image for this or any other device.
20   </p><p>
21
22   Caller must hold the reference count of <em class="parameter"><code>device</code></em>.
23   </p><p>
24
25   The function can be called safely inside device's suspend and
26   resume callback.
27</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-unregister-node.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch02s02.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-request-firmware-direct.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">unregister_node</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">request_firmware_direct</span></td></tr></table></div></body></html>
28