1<html><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 V1.78.1"><link rel="home" href="index.html" title="Linux Device Drivers"><link rel="up" href="spi.html" title="Chapter&#160;9.&#160;Serial Peripheral Interface (SPI)"><link rel="prev" href="API-devm-spi-register-master.html" title="devm_spi_register_master"><link rel="next" href="API-spi-busnum-to-master.html" title="spi_busnum_to_master"></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">spi_unregister_master</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-devm-spi-register-master.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;9.&#160;Serial Peripheral Interface (SPI)</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-spi-busnum-to-master.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-spi-unregister-master"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>spi_unregister_master &#8212; 
2     unregister SPI master controller
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">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">&#160;</div></div></div><div class="refsect1"><a name="idp1115124708"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>master</code></em></span></dt><dd><p>
4     the master being unregistered
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1115126332"></a><h2>Context</h2><p>
6   can sleep
7</p></div><div class="refsect1"><a name="idp1115126948"></a><h2>Description</h2><p>
8   This call is used only by SPI master controller drivers, which are the
9   only ones directly touching chip registers.
10   </p><p>
11
12   This must be called from context that can sleep.
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