Commit 49162116 authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman

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: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: default avatarIan Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5cb404d9
......@@ -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)
......
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