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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: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2014-07-14 12:23:39 -07:00 committed by Greg Kroah-Hartman
parent ba9a1e3f07
commit a8b677cb53
1 changed files with 13 additions and 0 deletions
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13
drivers/staging/comedi/comedidev.h
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@ -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)