update user's guide

docs/lcdproc-user/drivers/tyan.docbook

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+<sect1 id="tyan-howto">
+<title>The tyan Driver</title>
+
+<para>
+This section talks about using LCDproc with LCD displays that use the
+tyan chipset.
+</para>
+
+<!-- ## Tyan Barebones LCD driver (GS series; others too?) ## -->
+<sect2 id="tyan-config">
+<title>Configuration in LCDd.conf</title>
+
+<sect3>
+<title>[tyan]</title>
+
+<variablelist>
+<varlistentry>
+  <term>
+    <command>Device=</command>
+    <arg choice="plain"><replaceable>DEVICE</replaceable></arg>
+  </term>
+  <listitem><para>
+    Select the output device to use [default: <filename>/dev/lcd</filename>]
+  </para></listitem>
+</varlistentry>
+
+<varlistentry>
+  <term>
+    <command>Speed=</command>
+    <arg choice="plain">
+    <group choice="req">
+      <arg choice="plain"><literal>4800</literal></arg>
+      <arg choice="plain"><literal><emphasis>9600</emphasis></literal></arg>
+    </group>
+    </arg>
+  </term>
+  <listitem><para>
+    Set the the baud rate communication with the LCD.
+    If not given, the default is <literal>9600</literal>.
+  </para></listitem>
+</varlistentry>
+
+<varlistentry>
+  <term>
+    <command>Size=</command>
+    <arg choice="plain">
+      <replaceable>WIDTH</replaceable>
+      <literal>x</literal>
+      <replaceable>HEIGHT</replaceable>
+    </arg>
+  </term>
+  <listitem><para>
+    set display size [default: 16x2]
+  </para></listitem>
+</varlistentry>
+</variablelist>
+
+</sect3>
+
+</sect2>
+
+</sect1>