1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>mdiobus_write_nested</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Networking and Network Devices APIs"><link rel="up" href="ch02s02.html" title="PHY Support"><link rel="prev" href="API-mdiobus-read.html" title="mdiobus_read"><link rel="next" href="API-mdiobus-write.html" title="mdiobus_write"></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">mdiobus_write_nested</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-mdiobus-read.html">Prev</a> </td><th width="60%" align="center">PHY Support</th><td width="20%" align="right"> <a accesskey="n" href="API-mdiobus-write.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-mdiobus-write-nested"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>mdiobus_write_nested — 
2     Nested version of the mdiobus_write function
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">int <b class="fsfunc">mdiobus_write_nested </b>(</code></td><td>struct mii_bus * <var class="pdparam">bus</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">addr</var>, </td></tr><tr><td> </td><td>u32 <var class="pdparam">regnum</var>, </td></tr><tr><td> </td><td>u16 <var class="pdparam">val</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="id-1.4.3.64.5"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>bus</code></em></span></dt><dd><p>
4     the mii_bus struct
5    </p></dd><dt><span class="term"><em class="parameter"><code>addr</code></em></span></dt><dd><p>
6     the phy address
7    </p></dd><dt><span class="term"><em class="parameter"><code>regnum</code></em></span></dt><dd><p>
8     register number to write
9    </p></dd><dt><span class="term"><em class="parameter"><code>val</code></em></span></dt><dd><p>
10     value to write to <em class="parameter"><code>regnum</code></em>
11    </p></dd></dl></div></div><div class="refsect1"><a name="id-1.4.3.64.6"></a><h2>Description</h2><p>
12   In case of nested MDIO bus access avoid lockdep false positives by
13   using <code class="function">mutex_lock_nested</code>.
14</p></div><div class="refsect1"><a name="id-1.4.3.64.7"></a><h2>NOTE</h2><p>
15   MUST NOT be called from interrupt context,
16   because the bus read/write functions may wait for an interrupt
17   to conclude the operation.
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-mdiobus-read.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch02s02.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-mdiobus-write.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">mdiobus_read</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="phrase">mdiobus_write</span></td></tr></table></div></body></html>
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