Here is a code set up I have set up to link up the logo, to help page rendering performance I have used a sprite image and thus CSS to display the logo as a background image.
Nowadays you can't be too careful with Google, so I would really appreciate some input on this:
Example code: codepen.io/anon/pen/dqlva
There is no attempt to manipulate anything, I just chose for this route so I can optimize the site's front end loading performance. I didn't even include an anchor text.