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Commit e3693fd3 authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
Browse files

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: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9a8e7f63

drivers/staging/comedi/comedidev.h

+12 −0
Original line number Diff line number Diff line
@@ -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)