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staging: comedi: quatech_daqp_cs: there are 4 digital inputs

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This board has 4 digital inputs not 1. Fix the subdevice init.

The digital input lines are shared with other functions. 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 14:22:49 -07:00 • committed by Greg Kroah-Hartman
commit 4d6b700801
1 changed files with 12 additions and 1 deletions
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13
drivers/staging/comedi/drivers/quatech_daqp_cs.c
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@ -741,10 +741,21 @@ static int daqp_auto_attach(struct comedi_device *dev,
if (ret)
return ret;
/*
* Digital Input subdevice
* NOTE: The digital input lines are shared:
*
* Chan Normal Mode Expansion Mode
* ---- ----------------- ----------------------------
* 0 DI0, ext. trigger Same as normal mode
* 1 DI1 External gain select, lo bit
* 2 DI2, ext. clock Same as normal mode
* 3 DI3 External gain select, hi bit
*/
s = &dev->subdevices[2];
s->type = COMEDI_SUBD_DI;
s->subdev_flags = SDF_READABLE;
s->n_chan = 1;
s->n_chan = 4;
s->maxdata = 1;
s->insn_bits = daqp_di_insn_bits;