From f0c9305ede52b42021ea53a33b3a2878e0c5d51e Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 22 Mar 2016 11:10:34 -0700 Subject: [PATCH] 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: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- 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); -- 2.7.4