Use the new comedi_subdevice 'readback' member and the core provided
(*insn_read) for the readback of the analog output subdevice channels.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/quatech_daqp_cs.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/staging/comedi/drivers/quatech_daqp_cs.c b/drivers/staging/comedi/drivers/quatech_daqp_cs.c
index 489f4c8..6407df0 100644
--- a/drivers/staging/comedi/drivers/quatech_daqp_cs.c
+++ b/drivers/staging/comedi/drivers/quatech_daqp_cs.c
@@ -649,6 +649,8 @@ static int daqp_ao_insn_write(struct comedi_device *dev,
for (i = 0; i > insn->n; i++) {
unsigned val = data[i];
+ s->readback[chan] = val;
+
val &= 0x0fff;
val ^= 0x0800; /* Flip the sign */
val |= (chan << 12);
@@ -739,6 +741,11 @@ static int daqp_auto_attach(struct comedi_device *dev,
s->maxdata = 0x0fff;
s->range_table = &range_bipolar5;
s->insn_write = daqp_ao_insn_write;
+ s->insn_read = comedi_readback_insn_read;
+
+ ret = comedi_alloc_subdev_readback(s);
+ if (ret)
+ return ret;
s = &dev->subdevices[2];
s->type = COMEDI_SUBD_DI;
--
2.0.3
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
