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staging: comedi: pcmad: use comedi_range_is_bipolar()

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Use the core provided helper function instead of duplicating it as
a private function.

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 2013-08-28 14:59:17 -07:00 committed by Greg Kroah-Hartman
parent b59f105c7e
commit 43db70a507
1 changed files with 1 additions and 7 deletions
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8
drivers/staging/comedi/drivers/pcmad.c
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@ -75,12 +75,6 @@ static int pcmad_ai_wait_for_eoc(struct comedi_device *dev,
return -ETIME; return -ETIME;
} }
static bool pcmad_range_is_bipolar(struct comedi_subdevice *s,
unsigned int range)
{
return s->range_table->range[range].min < 0;
}
static int pcmad_ai_insn_read(struct comedi_device *dev, static int pcmad_ai_insn_read(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_subdevice *s,
struct comedi_insn *insn, struct comedi_insn *insn,
@ -106,7 +100,7 @@ static int pcmad_ai_insn_read(struct comedi_device *dev,
if (s->maxdata == 0x0fff) if (s->maxdata == 0x0fff)
val >>= 4; val >>= 4;
if (pcmad_range_is_bipolar(s, range)) { if (comedi_range_is_bipolar(s, range)) {
/* munge the two's complement value */ /* munge the two's complement value */
val ^= ((s->maxdata + 1) >> 1); val ^= ((s->maxdata + 1) >> 1);
} }