<p><b>@aabadie</b> commented on this pull request.</p>

<p>I have a few minor comments, even if it looks good in general code-wise. I haven't the board for testing but you can easily find someone in Berlin for this.</p><hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/11096#discussion_r262649997">boards/reel/doc.txt</a>:</p>
<pre style='color:#555'>> @@ -0,0 +1,14 @@
+/**
+@defgroup    boards_reel reel
+@ingroup     boards
+@brief       Support for the PHYTEC 'reel board'
+
+## Overview
+
+The 'reel board' is an IoT development platform base on Nordic's nRF52840 SoC.
</pre>
<p>s/base on/based on/</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/11096#discussion_r262651117">boards/reel/doc.txt</a>:</p>
<pre style='color:#555'>> @@ -0,0 +1,14 @@
+/**
+@defgroup    boards_reel reel
</pre>
<p>The board group name should be more explicit, e.g. something like <code>Phytec reel board</code> or something. Otherwise, this will just add an entry called 'reel' in the doxygen documentation, this will look weird.</p>
<p>Regarding the build system, I know 'reel' is fast and simple to type when calling make, but it's also a too generic word. What about using <code>phytec-reel</code> ? Like this it will be listed close to other phytec boards (pba-xxx-zz-kw2x and phynode-kw41z).<br>
This second comment is not blocking, and after all, you are the author, so you decide ;)</p>

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