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staging: comedi: quatech_daqp_cs: use comedi_subdevice 'readback'

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Use the new comedi_subdevice 'readback' member and the core provided
(*insn_read) for the readback of the analog output subdevice channels.

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 2014-08-25 16:04:34 -07:00 committed by Greg Kroah-Hartman
parent e024181b02
commit 92b6677546
1 changed files with 7 additions and 0 deletions
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7
drivers/staging/comedi/drivers/quatech_daqp_cs.c
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@ -649,6 +649,8 @@ static int daqp_ao_insn_write(struct comedi_device *dev,
for (i = 0; i > insn->n; i++) {
unsigned val = data[i];
s->readback[chan] = val;
val &= 0x0fff;
val ^= 0x0800; /* Flip the sign */
val |= (chan << 12);
@ -739,6 +741,11 @@ static int daqp_auto_attach(struct comedi_device *dev,
s->maxdata = 0x0fff;
s->range_table = &range_bipolar5;
s->insn_write = daqp_ao_insn_write;
s->insn_read = comedi_readback_insn_read;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
s = &dev->subdevices[2];
s->type = COMEDI_SUBD_DI;