Commit f0c9305e authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
Browse files

staging: comedi: ni_660x: add a comment about the initial DIO state 



The (*auto_attach) initializes all the DIO channels to a default state.
Add a comment for clarity.

Signed-off-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: default avatarIan Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent aa94f288

drivers/staging/comedi/drivers/ni_660x.c

+5 −0
Original line number Diff line number Diff line
@@ -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);