diff options
| author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2013-06-05 15:52:31 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-06 12:03:09 -0700 |
| commit | e3693fd3baeddf2e96b2f7734a5fe5509acedb40 (patch) | |
| tree | ec26941fc659bcd9232cfb47f9c71292321a92e1 /drivers/staging/comedi/comedidev.h | |
| parent | 9a8e7f63dc77d2a4134791da74deb697889d56d9 (diff) | |
staging: comedi: introduce comedi_range_is_{bi,uni}polar()
Introduce some helper functions to check if a given 'range' index
to a comedi_subdevice 'range_table' is a bipolar or unipolar range.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: 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 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h index ab926a6654e..57deabf7741 100644 --- a/drivers/staging/comedi/comedidev.h +++ b/drivers/staging/comedi/comedidev.h @@ -307,6 +307,18 @@ struct comedi_lrange { struct comedi_krange range[GCC_ZERO_LENGTH_ARRAY]; }; +static inline bool comedi_range_is_bipolar(struct comedi_subdevice *s, + unsigned int range) +{ + return s->range_table->range[range].min < 0; +} + +static inline bool comedi_range_is_unipolar(struct comedi_subdevice *s, + unsigned int range) +{ + return s->range_table->range[range].min >= 0; +} + /* some silly little inline functions */ static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd) |