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  <div class="section" id="trusted-platform-module-tpm">
<span id="device-tree-tpm"></span><h1>Trusted Platform Module (TPM)<a class="headerlink" href="#trusted-platform-module-tpm" title="Permalink to this headline">¶</a></h1>
<p>The tpm node describes a TPM device present in the platform. It also includes
event log information.</p>
<div class="section" id="required-properties">
<h2>Required properties<a class="headerlink" href="#required-properties" title="Permalink to this headline">¶</a></h2>
<p>All these properties are consumed by skiboot and the linux kernel (tpm and
vtpm codes)</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">compatible</span> <span class="p">:</span>       <span class="n">should</span> <span class="n">have</span> <span class="s2">&quot;nuvoton,npct650&quot;</span>

<span class="n">linux</span><span class="p">,</span><span class="n">sml</span><span class="o">-</span><span class="n">base</span><span class="p">:</span>    <span class="mi">64</span><span class="o">-</span><span class="n">bit</span> <span class="n">base</span> <span class="n">address</span> <span class="n">of</span> <span class="n">the</span> <span class="n">reserved</span> <span class="n">memory</span> <span class="n">allocated</span> <span class="k">for</span> <span class="n">firmware</span> <span class="n">event</span> <span class="n">log</span><span class="o">.</span>
                   <span class="n">sml</span> <span class="n">stands</span> <span class="k">for</span> <span class="n">shared</span> <span class="n">memory</span> <span class="n">log</span><span class="o">.</span>

<span class="n">linux</span><span class="p">,</span><span class="n">sml</span><span class="o">-</span><span class="n">size</span><span class="p">:</span>    <span class="n">size</span> <span class="n">of</span> <span class="n">the</span> <span class="n">memory</span> <span class="n">allocated</span> <span class="k">for</span> <span class="n">firmware</span> <span class="n">event</span> <span class="n">log</span><span class="o">.</span>
</pre></div>
</div>
</div>
<div class="section" id="optional-properties">
<h2>Optional properties<a class="headerlink" href="#optional-properties" title="Permalink to this headline">¶</a></h2>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">status</span><span class="p">:</span>            <span class="n">indicates</span> <span class="n">whether</span> <span class="n">the</span> <span class="n">device</span> <span class="ow">is</span> <span class="n">enabled</span> <span class="ow">or</span> <span class="n">disabled</span><span class="o">.</span> <span class="s2">&quot;okay&quot;</span> <span class="k">for</span>
                   <span class="n">enabled</span> <span class="ow">and</span> <span class="s2">&quot;disabled&quot;</span> <span class="k">for</span> <span class="n">disabled</span><span class="o">.</span>
</pre></div>
</div>
</div>
<div class="section" id="example">
<h2>Example<a class="headerlink" href="#example" title="Permalink to this headline">¶</a></h2>
<div class="highlight-dts notranslate"><div class="highlight"><pre><span></span><span class="nc">tpm</span><span class="nf">@57</span> <span class="p">{</span>
    <span class="nf">reg</span> <span class="o">=</span> <span class="p">&lt;</span><span class="mh">0x57</span><span class="p">&gt;;</span>
    <span class="nf">compatible</span> <span class="o">=</span> <span class="s">&quot;nuvoton,npct650&quot;, &quot;nuvoton,npct601&quot;</span><span class="p">;</span>
    <span class="nf">linux,sml-base</span> <span class="o">=</span> <span class="p">&lt;</span><span class="mh">0x7f</span> <span class="mh">0xfd450000</span><span class="p">&gt;;</span>
    <span class="nf">linux,sml-size</span> <span class="o">=</span> <span class="p">&lt;</span><span class="mh">0x10000</span><span class="p">&gt;;</span>
    <span class="nf">status</span> <span class="o">=</span> <span class="s">&quot;okay&quot;</span><span class="p">;</span>
    <span class="nf">phandle</span> <span class="o">=</span> <span class="p">&lt;</span><span class="mh">0x10000017</span><span class="p">&gt;;</span>
    <span class="nf">linux,phandle</span> <span class="o">=</span> <span class="p">&lt;</span><span class="mh">0x10000017</span><span class="p">&gt;;</span>
<span class="p">};</span>
</pre></div>
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  <ul>
<li><a class="reference internal" href="#">Trusted Platform Module (TPM)</a><ul>
<li><a class="reference internal" href="#required-properties">Required properties</a></li>
<li><a class="reference internal" href="#optional-properties">Optional properties</a></li>
<li><a class="reference internal" href="#example">Example</a></li>
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