Use comedi_timeout() to wait for the analog output 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/adl_pci6208.c | 22 ++++++++++------------
1 file changed, 10 insertions(+), 12 deletions(-)
diff --git a/drivers/staging/comedi/drivers/adl_pci6208.c
b/drivers/staging/comedi/drivers/adl_pci6208.c
index 5c1413a..921f694 100644
--- a/drivers/staging/comedi/drivers/adl_pci6208.c
+++ b/drivers/staging/comedi/drivers/adl_pci6208.c
@@ -73,19 +73,17 @@ struct pci6208_private {
unsigned int ao_readback[PCI6208_MAX_AO_CHANNELS];
};
-static int pci6208_ao_wait_for_data_send(struct comedi_device *dev,
- unsigned int timeout)
+static int pci6208_ao_eoc(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned long context)
{
unsigned int status;
- while (timeout--) {
- status = inw(dev->iobase + PCI6208_AO_STATUS);
- if ((status & PCI6208_AO_STATUS_DATA_SEND) == 0)
- return 0;
- udelay(1);
- }
-
- return -ETIME;
+ status = inw(dev->iobase + PCI6208_AO_STATUS);
+ if ((status & PCI6208_AO_STATUS_DATA_SEND) == 0)
+ return 0;
+ return -EBUSY;
}
static int pci6208_ao_insn_write(struct comedi_device *dev,
@@ -102,8 +100,8 @@ static int pci6208_ao_insn_write(struct comedi_device *dev,
for (i = 0; i < insn->n; i++) {
val = data[i];
- /* D/A transfer rate is 2.2us, wait up to 10us */
- ret = pci6208_ao_wait_for_data_send(dev, 10);
+ /* D/A transfer rate is 2.2us */
+ ret = comedi_timeout(dev, s, insn, pci6208_ao_eoc, 0);
if (ret)
return ret;
--
1.8.5.2
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