Use the comedi_offset_munge() helper to convert the hardware two's
complement values to the offset binary format expected by comedi.
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/usbdux.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/comedi/drivers/usbdux.c
b/drivers/staging/comedi/drivers/usbdux.c
index eea41e8..39710f2 100644
--- a/drivers/staging/comedi/drivers/usbdux.c
+++ b/drivers/staging/comedi/drivers/usbdux.c
@@ -266,7 +266,7 @@ static void usbduxsub_ai_handle_urb(struct comedi_device
*dev,
/* bipolar data is two's-complement */
if (comedi_range_is_bipolar(s, range))
- val ^= ((s->maxdata + 1) >> 1);
+ val = comedi_offset_munge(s, val);
/* transfer data */
if (!comedi_buf_write_samples(s, &val, 1))
@@ -776,7 +776,7 @@ static int usbdux_ai_insn_read(struct comedi_device *dev,
/* bipolar data is two's-complement */
if (comedi_range_is_bipolar(s, range))
- val ^= ((s->maxdata + 1) >> 1);
+ val = comedi_offset_munge(s, val);
data[i] = val;
}
--
2.4.3
_______________________________________________
devel mailing list
de...@linuxdriverproject.org
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
