title: What is the U-Boot API?
body: <p>The U-Boot v2021.01 configuration menu has a configuration option <code>Enable U-Boot API</code> under the <code>API</code> section. The help page provided below isn't explanatory enough.</p>
  <blockquote>
  <p>This option enables the U-Boot API.</p>
  </blockquote>
  <p>So, what actually is the U-Boot API? What kind of things does it offer us?</p>