From: H Hartley Sweeten Date: Wed, 25 Sep 2013 22:35:06 +0000 (-0700) Subject: staging: comedi: core: introduce comedi_chan_range_is_{bi,uni}polar() X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4916211615e21b1ae80632e57b6e0c8434b126fe;p=openwrt%2Fstaging%2Fblogic.git staging: comedi: core: introduce comedi_chan_range_is_{bi,uni}polar() Introduce two helper functions to check if a subdevice range_table_list for a given channel/range is bipolar or unipolar. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h index bec227665e6a..6db099bdbc58 100644 --- a/drivers/staging/comedi/comedidev.h +++ b/drivers/staging/comedi/comedidev.h @@ -307,6 +307,20 @@ static inline bool comedi_range_is_unipolar(struct comedi_subdevice *s, return s->range_table->range[range].min >= 0; } +static inline bool comedi_chan_range_is_bipolar(struct comedi_subdevice *s, + unsigned int chan, + unsigned int range) +{ + return s->range_table_list[chan]->range[range].min < 0; +} + +static inline bool comedi_chan_range_is_unipolar(struct comedi_subdevice *s, + unsigned int chan, + unsigned int range) +{ + return s->range_table_list[chan]->range[range].min >= 0; +} + /* munge between offset binary and two's complement values */ static inline unsigned int comedi_offset_munge(struct comedi_subdevice *s, unsigned int val)