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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>spi_unregister_master</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="ch09.html" title="Chapter 9. Serial Peripheral Interface (SPI)" /><link rel="prev" href="re747.html" title="spi_register_master" /><link rel="next" href="re749.html" title="spi_busnum_to_master" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>spi_unregister_master</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re747.html">Prev</a> </td><th width="60%" align="center">Chapter 9. Serial Peripheral Interface (SPI)</th><td width="20%" align="right"> <a accesskey="n" href="re749.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="spi_unregister_master"><a id="API-spi-unregister-master"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>spi_unregister_master —
unregister SPI master controller
</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">void <b class="fsfunc">spi_unregister_master </b>(</code></td><td>struct spi_master * <var class="pdparam">master</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2707216"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>master</code></em></span></dt><dd><p>
the master being unregistered
</p></dd></dl></div></div><div class="refsect1" title="Context"><a id="id2707243"></a><h2>Context</h2><p>
can sleep
</p></div><div class="refsect1" title="Description"><a id="id2707254"></a><h2>Description</h2><p>
This call is used only by SPI master controller drivers, which are the
only ones directly touching chip registers.
</p><p>
This must be called from context that can sleep.
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