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/pcmad.c | 21 ++++++++++-----------
1 file changed, 10 insertions(+), 11 deletions(-)
diff --git a/drivers/staging/comedi/drivers/pcmad.c
b/drivers/staging/comedi/drivers/pcmad.c
index fe482fd..87c61d9b 100644
--- a/drivers/staging/comedi/drivers/pcmad.c
+++ b/drivers/staging/comedi/drivers/pcmad.c
@@ -61,18 +61,17 @@ static const struct pcmad_board_struct pcmad_boards[] = {
},
};
-#define TIMEOUT 100
-
-static int pcmad_ai_wait_for_eoc(struct comedi_device *dev,
- int timeout)
+static int pcmad_ai_eoc(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned long context)
{
- int i;
+ unsigned int status;
- for (i = 0; i < timeout; i++) {
- if ((inb(dev->iobase + PCMAD_STATUS) & 0x3) == 0x3)
- return 0;
- }
- return -ETIME;
+ status = inb(dev->iobase + PCMAD_STATUS);
+ if ((status & 0x3) == 0x3)
+ return 0;
+ return -EBUSY;
}
static int pcmad_ai_insn_read(struct comedi_device *dev,
@@ -89,7 +88,7 @@ static int pcmad_ai_insn_read(struct comedi_device *dev,
for (i = 0; i < insn->n; i++) {
outb(chan, dev->iobase + PCMAD_CONVERT);
- ret = pcmad_ai_wait_for_eoc(dev, TIMEOUT);
+ ret = comedi_timeout(dev, s, insn, pcmad_ai_eoc, 0);
if (ret)
return ret;
--
1.8.5.2
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