diff options
| author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2014-03-04 11:30:08 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-06 17:06:16 -0800 |
| commit | 1e66bb255e42e4d16d345dae5b5e5d1b2d0bea41 (patch) | |
| tree | bf6945514f98856dedfc8c95faaea9d20ecec4f9 /drivers/staging/comedi/drivers/pcl812.c | |
| parent | 939d33d688e208a2c8ff0f083704c15b0c11d4ee (diff) | |
staging: comedi: pcl812: introduce pcl812_ai_soft_trig()
Introduce a helper function to start a software triggered analog input
conversion.
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>
Diffstat (limited to 'drivers/staging/comedi/drivers/pcl812.c')
| -rw-r--r-- | drivers/staging/comedi/drivers/pcl812.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/staging/comedi/drivers/pcl812.c b/drivers/staging/comedi/drivers/pcl812.c index b41dbbc5e38e..9fb3e848ac7e 100644 --- a/drivers/staging/comedi/drivers/pcl812.c +++ b/drivers/staging/comedi/drivers/pcl812.c @@ -643,6 +643,12 @@ static void pcl812_ai_clear_eoc(struct comedi_device *dev) outb(0, dev->iobase + PCL812_CLRINT); } +static void pcl812_ai_soft_trig(struct comedi_device *dev) +{ + /* writing any value triggers a software conversion */ + outb(255, dev->iobase + PCL812_SOFTTRIG); +} + static unsigned int pcl812_ai_get_sample(struct comedi_device *dev, struct comedi_subdevice *s) { @@ -1028,8 +1034,7 @@ static int pcl812_ai_insn_read(struct comedi_device *dev, for (i = 0; i < insn->n; i++) { pcl812_ai_clear_eoc(dev); - /* start conversion */ - outb(255, dev->iobase + PCL812_SOFTTRIG); + pcl812_ai_soft_trig(dev); ret = comedi_timeout(dev, s, insn, pcl812_ai_eoc, 0); if (ret) |