1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>i2c_smbus_write_byte_data</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="i2c.html" title="Chapter&#160;10.&#160;I2C and SMBus Subsystem"><link rel="prev" href="API-i2c-smbus-read-byte-data.html" title="i2c_smbus_read_byte_data"><link rel="next" href="API-i2c-smbus-read-word-data.html" title="i2c_smbus_read_word_data"></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">i2c_smbus_write_byte_data</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-i2c-smbus-read-byte-data.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;10.&#160;I<sup>2</sup>C and SMBus Subsystem</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-i2c-smbus-read-word-data.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-i2c-smbus-write-byte-data"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>i2c_smbus_write_byte_data &#8212; 
2     SMBus <span class="quote">&#8220;<span class="quote">write byte</span>&#8221;</span> protocol
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">s32 <b class="fsfunc">i2c_smbus_write_byte_data </b>(</code></td><td>const struct i2c_client * <var class="pdparam">client</var>, </td></tr><tr><td>&#160;</td><td>u8 <var class="pdparam">command</var>, </td></tr><tr><td>&#160;</td><td>u8 <var class="pdparam">value</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1115504980"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>client</code></em></span></dt><dd><p>
4     Handle to slave device
5    </p></dd><dt><span class="term"><em class="parameter"><code>command</code></em></span></dt><dd><p>
6     Byte interpreted by slave
7    </p></dd><dt><span class="term"><em class="parameter"><code>value</code></em></span></dt><dd><p>
8     Byte being written
9    </p></dd></dl></div></div><div class="refsect1"><a name="idp1115508612"></a><h2>Description</h2><p>
10   This executes the SMBus <span class="quote">&#8220;<span class="quote">write byte</span>&#8221;</span> protocol, returning negative errno
11   else zero on success.
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