Should role=“contentinfo” be added on a footer or a p element?

Hi everyone,

On ARIA demonstration websites, role="contentinfo" is usually added on a
footer element.

However, footers in modern web
design<http://www.smashingmagazine.com/2008/04/08/footers-in-modern-web-design-creative-examples-and-ideas/>can
be creative so that they can also contain things like supplementary
navigation links, social website links, or even a newsletter form.

Taking the following codes of footer for example. Should
role="contentinfo"be added on the
footer or the p element?

<footer>
    <nav>
        <ul>
            ........
            ........
            ........
            ........
            ........
        </ul>
    </nav>
    <form>
        ........
        ........
        ........
    </form>
    <p>© 2012 Website.com. All rights reserved.</p>
</footer>


Kind Regards,
Ian Yang