source: general/prog/dtc.xml@ e21d933d

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY dtc-download-http "https://kernel.org/pub/software/utils/dtc/dtc-&dtc-version;.tar.xz">
  <!ENTITY dtc-md5sum        "228576aceed3aa89f54283aa0f1eb820">
  <!ENTITY dtc-size          "164 KB">
  <!ENTITY dtc-buildsize     "14 MB">
  <!ENTITY dtc-time          "less than 0.1 SBU">
]>

<!-- Try to keep the indentation used in this file-->
<sect1 id="dtc" xreflabel="dtc-&dtc-version;">
  <?dbhtml filename="dtc.html"?>

  <title>Dtc-&dtc-version;</title>

  <indexterm zone="dtc">
    <primary sortas="a-dtc">dtc</primary>
  </indexterm>

  <!--Required section-->
  <sect2 role="package">
    <title>Introduction to Dtc</title>

    <para>
      The <application>dtc</application> package contains the Device Tree
      Compiler for working with device tree source and binary files and also
      libfdt, a utility library for reading and manipulating device trees
      in the binary format.
    </para>

    &lfs121_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&dtc-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &dtc-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &dtc-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &dtc-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &dtc-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">Dtc Dependencies</bridgehead>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend='libyaml'/>,
      <xref linkend='setuptools_scm'/>,
      <xref linkend='swig'/>, and
      <xref linkend='texlive'/>
    </para>
  </sect2>

  <sect2 role="installation">
    <title>Installation of Dtc</title>

    <para>
      Install <application>dtc</application> by running the following
      commands:
    </para>

<screen><userinput>mkdir build &amp;&amp;
cd    build &amp;&amp;

meson setup --prefix=/usr        \
            --buildtype=release  \
            -Dpython=disabled .. &amp;&amp;
ninja</userinput></screen>

    <para>
      To test the results, issue: <command>meson test -v</command>.
      <!-- https://github.com/dgibson/dtc/commit/32174a66efa4 -->
      Two tests named <filename>cell-overflow.dts</filename> and
      <filename>cell-overflow-results.dts</filename> are known to fail.
    </para>

    <para>
      Now, as the &root; user:
    </para>

    <screen role="root"><userinput>ninja install</userinput></screen>

    <para>
      Still as the &root; user, remove the useless static library:
    </para>

    <screen role="root"><userinput>rm /usr/lib/libfdt.a</userinput></screen>

    <para>
      If you have <xref linkend='texlive'/> installed, you can build the PDF
      format of the documentation by issuing the following command:
    </para>

    <screen remap="doc"><userinput>pushd ../Documentation
  latexmk -bibtex --pdf dtc-paper &amp;&amp;
  latexmk -bibtex --pdf dtc-paper -c
popd</userinput></screen>

    <para>
      To install the documentation, as the &root; user issue the following
      command:
    </para>

    <screen role="root"><userinput>cp -R ../Documentation -T /usr/share/doc/dtc-&dtc-version;</userinput></screen>

    <para>
      If you have installed both <xref linkend='setuptools_scm'/> and
      <xref linkend='swig'/> and you wish to install the Python 3 binding
      of this package, build the Python 3 module:
    </para>
 
    <screen role="nodump"><userinput>sed -i '/use_scm_version/a "fallback_version": "1.7.0",' ../setup.py &amp;&amp;
&build-wheel-cmd; ..</userinput></screen>

    <para>
      As the &root; user, install the Python 3 module:
    </para>

    <screen role="nodump"><userinput>&install-wheel;</userinput></screen>
  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/meson-buildtype-release.xml"/>

    <para>
      <parameter>-Dpython=disabled</parameter>: This switch prevents
      building the Python 3 binding with the deprecated method
      (running <command>setup.py</command> directly).  We will build the
      Python 3 binding with the <command>pip3 wheel</command> command
      separately if wanted.
    </para>

    <para>
      <command>sed ... ../setup.py</command>: This command allows building
      the Python 3 binding from a release tarball (instead of a Git
      checkout).
    </para>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Library</segtitle>
      <segtitle>Installed Directory</segtitle>

      <seglistitem>
        <seg>
          convert-dtsv0, dtc, dtdiff, fdtdump, fdtget, fdtoverlay,
          and fdtput
        </seg>
        <seg>
          libfdt.so
        </seg>
        <seg>
          /usr/lib/python&python3-majorver;/site-packages/libfdt-&dtc-version;.dist-info
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="convert-dtsv0">
        <term><command>convert-dtsv0</command></term>
        <listitem>
          <para>
            converts device tree v0 source to device tree v1
          </para>
          <indexterm zone="dtc convert-dtsv0">
            <primary sortas="b-convert-dtsv0">convert-dtsv0</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="dtc-prog">
        <term><command>dtc</command></term>
        <listitem>
          <para>
            compiles device tree source (dts) to device tree binary blob
            (dtb), or de-compiles dtb to dts
          </para>
          <indexterm zone="dtc dtc-prog">
            <primary sortas="b-dtc">dtc</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="dtdiff">
        <term><command>dtdiff</command></term>
        <listitem>
          <para>
            compares two different device tree
          </para>
          <indexterm zone="dtc dtdiff">
            <primary sortas="b-dtdiff">dtdiff</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="fdtdump">
        <term><command>fdtdump</command></term>
        <listitem>
          <para>
            prints a readable version of a flat device-tree file
          </para>
          <indexterm zone="dtc fdtdump">
            <primary sortas="b-fdtdump">fdtdump</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="fdtget">
        <term><command>fdtget</command></term>
        <listitem>
          <para>
            reads values from device-tree
          </para>
          <indexterm zone="dtc fdtget">
            <primary sortas="b-fdtget">fdtget</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="fdtoverlay">
        <term><command>fdtoverlay</command></term>
        <listitem>
          <para>
            applies a number of overlays to a base device tree blob
          </para>
          <indexterm zone="dtc fdtoverlay">
            <primary sortas="b-fdtoverlay">fdtoverlay</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="fdtput">
        <term><command>fdtput</command></term>
        <listitem>
          <para>
            writes a property value to a device tree
          </para>
          <indexterm zone="dtc fdtput">
            <primary sortas="b-fdtput">fdtput</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libfdt">
        <term><filename class="libraryfile">libfdt.so</filename></term>
        <listitem>
          <para>
            is a utility library for reading and manipulating device trees
            in the binary format
          </para>
          <indexterm zone="dtc libfdt">
            <primary sortas="c-libfdt">libfdt.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>
    </variablelist>
  </sect2>
</sect1>