https://bugzilla.kernel.org/show_bug.cgi?id=44121
--- Comment #7 from Alex Deucher alexdeucher@gmail.com 2012-07-03 17:31:40 --- Created an attachment (id=74711) --> (https://bugzilla.kernel.org/attachment.cgi?id=74711) possible fix
or this variant. Although AFAIK, programming the USER register variants shouldn't be necessary as the default values (0) are valid.