This board has 4 digital outputs not 1. Fix the subdevice init.
The digital output lines are used for the external channel selection
when the expansion mode is enabled. Add a comment about this.
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/quatech_daqp_cs.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/comedi/drivers/quatech_daqp_cs.c
b/drivers/staging/comedi/drivers/quatech_daqp_cs.c
index 152cb14..a4a5244 100644
--- a/drivers/staging/comedi/drivers/quatech_daqp_cs.c
+++ b/drivers/staging/comedi/drivers/quatech_daqp_cs.c
@@ -748,10 +748,17 @@ static int daqp_auto_attach(struct comedi_device *dev,
s->maxdata = 1;
s->insn_bits = daqp_di_insn_bits;
+ /*
+ * Digital Output subdevice
+ * NOTE: The digital output lines share the same pins on the
+ * interface connector as the four external channel selection
+ * bits. If expansion mode is used the digital outputs do not
+ * work.
+ */
s = &dev->subdevices[3];
s->type = COMEDI_SUBD_DO;
s->subdev_flags = SDF_WRITABLE;
- s->n_chan = 1;
+ s->n_chan = 4;
s->maxdata = 1;
s->insn_bits = daqp_do_insn_bits;
--
2.5.1
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