If it helps anyone, I recall Linux would typically not allow use of the sorts of nonstandard baud rates that could result from this clocking change, in which case this “anybaud” utility would help (unless there’s an easier or newer standard way in Linux that I’m not aware of):
http://sensornodeinfo.rockingdlabs.com/blog/2016/01/19/baud74880/ — but I’m curious about either what approach you used, or what terminal util you used to support 24,000 Maximo :)