Implement .get_state instead of only reading the polarity at probe time.
This allows to get the proper state, period and duty cycle.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Reviewed-by: NChen-Yu Tsai <wens@csie.org>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>