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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_write</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="re735.html" title="struct spi_message" /><link rel="next" href="re737.html" title="spi_read" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>spi_write</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re735.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="re737.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="spi_write"><a id="API-spi-write"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>spi_write —
SPI synchronous write
</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">int <b class="fsfunc">spi_write </b>(</code></td><td>struct spi_device * <var class="pdparam">spi</var>, </td></tr><tr><td> </td><td>const u8 * <var class="pdparam">buf</var>, </td></tr><tr><td> </td><td>size_t <var class="pdparam">len</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2705300"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>spi</code></em></span></dt><dd><p>
device to which data will be written
</p></dd><dt><span class="term"><em class="parameter"><code>buf</code></em></span></dt><dd><p>
data buffer
</p></dd><dt><span class="term"><em class="parameter"><code>len</code></em></span></dt><dd><p>
data buffer size
</p></dd></dl></div></div><div class="refsect1" title="Context"><a id="id2705358"></a><h2>Context</h2><p>
can sleep
</p></div><div class="refsect1" title="Description"><a id="id2705368"></a><h2>Description</h2><p>
This writes the buffer and returns zero or a negative error code.
Callable only from contexts that can sleep.
</p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re735.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch09.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re737.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>struct spi_message</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>spi_read</span></td></tr></table></div></body></html>
