1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>pci_write_legacy_io</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux Kernel API"><link rel="up" href="ch09s05.html" title="PCI Support Library"><link rel="prev" href="API-pci-read-legacy-io.html" title="pci_read_legacy_io"><link rel="next" href="API-pci-mmap-legacy-mem.html" title="pci_mmap_legacy_mem"></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">pci_write_legacy_io</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-pci-read-legacy-io.html">Prev</a>&#160;</td><th width="60%" align="center">PCI Support Library</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-pci-mmap-legacy-mem.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-pci-write-legacy-io"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>pci_write_legacy_io &#8212; 
2     write byte(s) to legacy I/O port space
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">ssize_t <b class="fsfunc">pci_write_legacy_io </b>(</code></td><td>struct file * <var class="pdparam">filp</var>, </td></tr><tr><td>&#160;</td><td>struct kobject * <var class="pdparam">kobj</var>, </td></tr><tr><td>&#160;</td><td>struct bin_attribute * <var class="pdparam">bin_attr</var>, </td></tr><tr><td>&#160;</td><td>char * <var class="pdparam">buf</var>, </td></tr><tr><td>&#160;</td><td>loff_t <var class="pdparam">off</var>, </td></tr><tr><td>&#160;</td><td>size_t <var class="pdparam">count</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1127152796"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>filp</code></em></span></dt><dd><p>
4     open sysfs file
5    </p></dd><dt><span class="term"><em class="parameter"><code>kobj</code></em></span></dt><dd><p>
6     kobject corresponding to file to read from
7    </p></dd><dt><span class="term"><em class="parameter"><code>bin_attr</code></em></span></dt><dd><p>
8     struct bin_attribute for this file
9    </p></dd><dt><span class="term"><em class="parameter"><code>buf</code></em></span></dt><dd><p>
10     buffer containing value to be written
11    </p></dd><dt><span class="term"><em class="parameter"><code>off</code></em></span></dt><dd><p>
12     offset into legacy I/O port space
13    </p></dd><dt><span class="term"><em class="parameter"><code>count</code></em></span></dt><dd><p>
14     number of bytes to write
15    </p></dd></dl></div></div><div class="refsect1"><a name="idp1127159564"></a><h2>Description</h2><p>
16   Writes 1, 2, or 4 bytes from legacy I/O port space using an arch specific
17   callback routine (pci_legacy_write).
18</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-pci-read-legacy-io.html">Prev</a>&#160;</td><td width="20%" align="center"><a accesskey="u" href="ch09s05.html">Up</a></td><td width="40%" align="right">&#160;<a accesskey="n" href="API-pci-mmap-legacy-mem.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">pci_read_legacy_io</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">pci_mmap_legacy_mem</span></td></tr></table></div></body></html>
19