w1: ds1wm: add level interrupt modes
Signed-off-by: NJohannes Poehlmann <johannes.poehlmann@izt-labs.de>
Acked-by: NEvgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>