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Commit a8b677cb authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
Browse files

staging: comedi: comedidev.h: introduce some 'range_is_external' helpers 



The comedi_krange includes a flags member that currently identifies the
'units' of the range (RF_UNIT) and if the range is from an internal or
external source (RF_EXTERNAL).

Introduce some helper functions to check if a given range is from an
external source.

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 ba9a1e3f

drivers/staging/comedi/comedidev.h

+13 −0
Original line number Diff line number Diff line
@@ -363,6 +363,12 @@ static inline bool comedi_range_is_unipolar(struct comedi_subdevice *s, 
	return s->range_table->range[range].min >= 0;

}



static inline bool comedi_range_is_external(struct comedi_subdevice *s,

					    unsigned int range)

{

	return !!(s->range_table->range[range].flags & RF_EXTERNAL);

}



static inline bool comedi_chan_range_is_bipolar(struct comedi_subdevice *s,

						unsigned int chan,

						unsigned int range)
@@ -377,6 +383,13 @@ static inline bool comedi_chan_range_is_unipolar(struct comedi_subdevice *s, 
	return s->range_table_list[chan]->range[range].min >= 0;

}



static inline bool comedi_chan_range_is_external(struct comedi_subdevice *s,

						 unsigned int chan,

						 unsigned int range)

{

	return !!(s->range_table_list[chan]->range[range].flags & RF_EXTERNAL);

}



/* munge between offset binary and two's complement values */

static inline unsigned int comedi_offset_munge(struct comedi_subdevice *s,

					       unsigned int val)