The (*auto_attach) initializes all the DIO channels to a default state.
Add a comment for clarity.
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/ni_660x.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/staging/comedi/drivers/ni_660x.c
b/drivers/staging/comedi/drivers/ni_660x.c
index 3415a15..6f84946 100644
--- a/drivers/staging/comedi/drivers/ni_660x.c
+++ b/drivers/staging/comedi/drivers/ni_660x.c
@@ -1073,6 +1073,11 @@ static int ni_660x_auto_attach(struct comedi_device *dev,
for (i = 0; i < n_counters; ++i)
ni_tio_init_counter(&devpriv->counter_dev->counters[i]);
+ /*
+ * Default the DIO channels as:
+ * chan 0-7: DIO inputs
+ * chan 8-39: counter signal inputs
+ */
for (i = 0; i < NUM_PFI_CHANNELS; ++i) {
if (i < 8)
ni_660x_set_pfi_routing(dev, i, NI_660X_PFI_OUTPUT_DIO);
--
2.6.3
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