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staging: comedi: quatech_daqp_cs: there are 4 digital outputs

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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 <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten
2015-10-05 14:22:48 -07:00
committed by Greg Kroah-Hartman
parent 647d8aec47
commit 23d4f0245f
1 changed files with 8 additions and 1 deletions
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9
drivers/staging/comedi/drivers/quatech_daqp_cs.c
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@@ -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;