Introduce a helper function to start a software triggered analog input
conversion.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/pcl812.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/comedi/drivers/pcl812.c b/drivers/staging/comedi/drivers/pcl812.c
index b41dbbc..9fb3e84 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)
--
1.8.5.2
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