__  __    __   __  _____      _            _          _____ _          _ _ 
 |  \/  |   \ \ / / |  __ \    (_)          | |        / ____| |        | | |
 | \  / |_ __\ V /  | |__) | __ ___   ____ _| |_ ___  | (___ | |__   ___| | |
 | |\/| | '__|> <   |  ___/ '__| \ \ / / _` | __/ _ \  \___ \| '_ \ / _ \ | |
 | |  | | |_ / . \  | |   | |  | |\ V / (_| | ||  __/  ____) | | | |  __/ | |
 |_|  |_|_(_)_/ \_\ |_|   |_|  |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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<section id="ad3552r-driver">
<h1>AD3552R driver<a class="headerlink" href="#ad3552r-driver" title="Link to this heading">¶</a></h1>
<p>Device driver for Analog Devices Inc. AD35XXR series of DACs. The module name
is <code class="docutils literal notranslate"><span class="pre">ad3552r</span></code>.
With the same module name, two different driver variants are available, the
<code class="docutils literal notranslate"><span class="pre">generic</span> <span class="pre">spi</span></code> variant, to be used with any classic SPI controllers, and the
<code class="docutils literal notranslate"><span class="pre">hs</span></code> (high speed) variant, for an ADI <code class="docutils literal notranslate"><span class="pre">axi-dac</span></code> (IP core) based controller
that allows to reach the maximum sample rate supported from the DACs, using the
DMA transfer and all the SPI lines available (D/QDSPI)..
The high speed driver variant is intended to be used with the <code class="docutils literal notranslate"><span class="pre">adi-axi-dac</span></code>
backend support enabled, that is enabled by default when the driver is selected.</p>
<section id="supported-devices">
<h2>Supported devices<a class="headerlink" href="#supported-devices" title="Link to this heading">¶</a></h2>
<ul class="simple">
<li><p><a class="reference external" href="https://www.analog.com/en/products/ad3541r.html">AD3541R</a></p></li>
<li><p><a class="reference external" href="https://www.analog.com/en/products/ad3542r.html">AD3542R</a></p></li>
<li><p><a class="reference external" href="https://www.analog.com/en/products/ad3551r.html">AD3551R</a></p></li>
<li><p><a class="reference external" href="https://www.analog.com/en/products/ad3552r.html">AD3552R</a></p></li>
</ul>
</section>
<section id="wiring-connections">
<h2>Wiring connections<a class="headerlink" href="#wiring-connections" title="Link to this heading">¶</a></h2>
<section id="generic-spi">
<h3>Generic SPI<a class="headerlink" href="#generic-spi" title="Link to this heading">¶</a></h3>
<p>Use the classic SPI S_CLK/CS/SDO/SDI connection.</p>
</section>
<section id="high-speed-using-axi-dac-backend">
<h3>High speed (using axi-dac backend)<a class="headerlink" href="#high-speed-using-axi-dac-backend" title="Link to this heading">¶</a></h3>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>.-----------------.                .-------.
|                 |--- D/QSPI -----|       |
|   DAC IP CORE   |--- SPI S_CLK --|  DAC  |
|                 |--- SPI CS -----|       |
|                 |--- LDAC -------|       |
|                 |--- RESET ------|       |
|_________________|                |_______|
</pre></div>
</div>
</section>
</section>
<section id="high-speed-features">
<h2>High speed features<a class="headerlink" href="#high-speed-features" title="Link to this heading">¶</a></h2>
<section id="device-attributes">
<h3>Device attributes<a class="headerlink" href="#device-attributes" title="Link to this heading">¶</a></h3>
<p>The following table shows the ad35xxr related device debug files, found in the
specific debugfs path <code class="docutils literal notranslate"><span class="pre">/sys/kernel/debug/iio/iio:deviceX</span></code>.</p>
<table class="docutils align-default">
<tbody>
<tr class="row-odd"><td><p>Debugfs device files</p></td>
<td><p>Description</p></td>
</tr>
<tr class="row-even"><td><p>data_source</p></td>
<td><p>The used data source, as
<code class="docutils literal notranslate"><span class="pre">normal</span></code>, <code class="docutils literal notranslate"><span class="pre">ramp-16bit</span></code>, etc.</p></td>
</tr>
<tr class="row-odd"><td><p>data_source_available</p></td>
<td><p>The available data sources.</p></td>
</tr>
</tbody>
</table>
</section>
<section id="usage-examples">
<h3>Usage examples<a class="headerlink" href="#usage-examples" title="Link to this heading">¶</a></h3>
<div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>root:/sys/bus/iio/devices/iio:device0#<span class="w"> </span>cat<span class="w"> </span>data_source
normal
root:/sys/bus/iio/devices/iio:device0#<span class="w"> </span><span class="nb">echo</span><span class="w"> </span>-n<span class="w"> </span>ramp-16bit<span class="w"> </span>&gt;<span class="w"> </span>data_source
root:/sys/bus/iio/devices/iio:device0#<span class="w"> </span>cat<span class="w"> </span>data_source
ramp-16bit
</pre></div>
</div>
</section>
</section>
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