source code from : http://gitlab.oe5xbl.ampr.org/oe5hpm/dxlAPRS
commit ID        : 2824860b70c44f319594bbd475796cd46a73b26e
title            : ra02: change gpio handling
Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>
ra02: change gpio handling Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>