From e3693fd3baeddf2e96b2f7734a5fe5509acedb40 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Wed, 5 Jun 2013 15:52:31 -0700 Subject: [PATCH] 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 Cc: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/comedidev.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h index ab926a6654ef..57deabf77418 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) -- 2.39.5