1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>spi_alloc_device</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-spi-register-driver.html" title="spi_register_driver"><link rel="next" href="API-spi-add-device.html" title="spi_add_device"></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_alloc_device</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-spi-register-driver.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-add-device.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-spi-alloc-device"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>spi_alloc_device &#8212; 
2     Allocate a new SPI device
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">struct spi_device * <b class="fsfunc">spi_alloc_device </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="idp1115045156"></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     Controller to which device is connected
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1115046788"></a><h2>Context</h2><p>
6   can sleep
7</p></div><div class="refsect1"><a name="idp1115047404"></a><h2>Description</h2><p>
8   Allows a driver to allocate and initialize a spi_device without
9   registering it immediately.  This allows a driver to directly
10   fill the spi_device with device parameters before calling
11   <code class="function">spi_add_device</code> on it.
12   </p><p>
13
14   Caller is responsible to call <code class="function">spi_add_device</code> on the returned
15   spi_device structure to add it to the SPI master.  If the caller
16   needs to discard the spi_device without adding it, then it should
17   call <code class="function">spi_dev_put</code> on it.
18   </p><p>
19
20   Returns a pointer to the new device, or NULL.
21</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-spi-register-driver.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="spi.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-spi-add-device.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">spi_register_driver</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">spi_add_device</span></td></tr></table></div></body></html>
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