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+<table class="head">
+ <tr>
+ <td class="head-ltitle">IG4(4)</td>
+ <td class="head-vol">Device Drivers Manual</td>
+ <td class="head-rtitle">IG4(4)</td>
+ </tr>
+</table>
+<div class="manual-text">
+<section class="Sh">
+<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
+<p class="Pp"><code class="Nm">ig4</code> &#x2014; <span class="Nd">Synopsys
+ DesignWare I2C Controller</span></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
+<p class="Pp">To compile this driver into the kernel, place the following lines
+ into the kernel configuration file:</p>
+<div class="Bd Pp Bd-indent"><code class="Cd">device ig4</code>
+<br/>
+<code class="Cd">device iicbus</code></div>
+<p class="Pp">Alternatively, to load the driver as a module at boot time, place
+ the following line in <a class="Xr">loader.conf(5)</a>:</p>
+<div class="Bd Pp Bd-indent Li">
+<pre>ig4_load=&quot;YES&quot;</pre>
+</div>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
+<p class="Pp">The <code class="Nm">ig4</code> driver provides access to
+ peripherals attached to an I2C controller.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="HARDWARE"><a class="permalink" href="#HARDWARE">HARDWARE</a></h1>
+<p class="Pp"><code class="Nm">ig4</code> supports the I2C controllers based on
+ Synopsys DesignWare IP that can be found in Intel(R) Core(TM) processors
+ starting from the fourth generation, Intel(R) Bay Trail, Apollo Lake SoC
+ families, and some AMD systems.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="SYSCTL_VARIABLES"><a class="permalink" href="#SYSCTL_VARIABLES">SYSCTL
+ VARIABLES</a></h1>
+<p class="Pp">These <a class="Xr">sysctl(8)</a> variables are available:</p>
+<dl class="Bl-tag">
+ <dt id="debug.ig4_dump"><var class="Va">debug.ig4_dump</var></dt>
+ <dd>This sysctl is a zero-based bit mask. When any of the bits are set, a
+ register dump is printed for every I2C transfer on an
+ <code class="Nm">ig4</code> device with the same unit number.</dd>
+</dl>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
+ ALSO</a></h1>
+<p class="Pp"><a class="Xr">iic(4)</a>, <a class="Xr">iicbus(4)</a></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
+<p class="Pp">The <code class="Nm">ig4</code> driver was written for
+ <span class="Ux">DragonFly</span> by <span class="An">Matthew Dillon</span>
+ and subsequently ported to <span class="Ux">FreeBSD</span> by
+ <span class="An">Michael Gmelin</span>
+ &lt;<a class="Mt" href="mailto:freebsd@grem.de">freebsd@grem.de</a>&gt;.</p>
+<p class="Pp">This manual page was written by <span class="An">Michael
+ Gmelin</span>
+ &lt;<a class="Mt" href="mailto:freebsd@grem.de">freebsd@grem.de</a>&gt;.</p>
+</section>
+</div>
+<table class="foot">
+ <tr>
+ <td class="foot-date">September 13, 2018</td>
+ <td class="foot-os">FreeBSD 15.0</td>
+ </tr>
+</table>