diff options
| author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2013-09-25 15:35:06 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-09-26 09:32:18 -0700 |
| commit | 4916211615e21b1ae80632e57b6e0c8434b126fe (patch) | |
| tree | f3f969bc297e64728c683206f54c3bc0cc6e29bc /drivers/staging/comedi/comedidev.h | |
| parent | 5cb404d9272430e8a19c5d767885c63c6f1bfd17 (diff) | |
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 <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/comedi/comedidev.h')
| -rw-r--r-- | drivers/staging/comedi/comedidev.h | 14 |
1 files changed, 14 insertions, 0 deletions
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) |