On ARM side, RK3288* looks promising:<p><a href="https:&#x2F;&#x2F;libreboot.org&#x2F;docs&#x2F;hcl&#x2F;c201.html" rel="nofollow">https:&#x2F;&#x2F;libreboot.org&#x2F;docs&#x2F;hcl&#x2F;c201.html</a><p>* Yes, that is the very same RK3288 that has an embarrassing calendar bug discussed here a month ago: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10768140" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10768140</a>