I was confused as well, he did have surgery to clean up the collarbone, this like you said, is from the same area, he should be fine by camp, or close to it.
Shulman compares Donaldson to Blue Jays great Roberto Alomar
http://www.sportsnet.ca/baseball/mlb/shulman-compares-donaldson-to-blue-jays-great-roberto-alomar/