Consolidating similar algorithms into common functions to make
GPIO SCH simpler and manageable.
Signed-off-by: NChang Rebecca Swee Fun <rebecca.swee.fun.chang@intel.com>
Reviewed-by: NAlexandre Courbot <acourbot@nvidia.com>
Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>