Use comedi_timeout() to wait for the analog input end-of-conversion.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/pcl711.c | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)
diff --git a/drivers/staging/comedi/drivers/pcl711.c
b/drivers/staging/comedi/drivers/pcl711.c
index 6595788..7c03a5d 100644
--- a/drivers/staging/comedi/drivers/pcl711.c
+++ b/drivers/staging/comedi/drivers/pcl711.c
@@ -253,18 +253,17 @@ static void pcl711_set_changain(struct comedi_device *dev,
outb(mux | PCL711_MUX_CHAN(chan), dev->iobase + PCL711_MUX_REG);
}
-static int pcl711_ai_wait_for_eoc(struct comedi_device *dev,
- unsigned int timeout)
+static int pcl711_ai_eoc(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned long context)
{
- unsigned int msb;
+ unsigned int status;
- while (timeout--) {
- msb = inb(dev->iobase + PCL711_AI_MSB_REG);
- if ((msb & PCL711_AI_MSB_DRDY) == 0)
- return 0;
- udelay(1);
- }
- return -ETIME;
+ status = inb(dev->iobase + PCL711_AI_MSB_REG);
+ if ((status & PCL711_AI_MSB_DRDY) == 0)
+ return 0;
+ return -EBUSY;
}
static int pcl711_ai_insn_read(struct comedi_device *dev,
@@ -282,7 +281,7 @@ static int pcl711_ai_insn_read(struct comedi_device *dev,
for (i = 0; i < insn->n; i++) {
outb(PCL711_SOFTTRIG, dev->iobase + PCL711_SOFTTRIG_REG);
- ret = pcl711_ai_wait_for_eoc(dev, 100);
+ ret = comedi_timeout(dev, s, insn, pcl711_ai_eoc, 0);
if (ret)
return ret;
--
1.8.5.2
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