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staging: comedi: das16: 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 16:04:03 -07:00
committed by Greg Kroah-Hartman
parent 800242553a
commit 551739b0d3
1 changed files with 9 additions and 2 deletions
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11
drivers/staging/comedi/drivers/das16.c
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@@ -927,11 +927,13 @@ static int das16_ao_insn_write(struct comedi_device *dev,
unsigned int *data)
{
unsigned int chan = CR_CHAN(insn->chanspec);
unsigned int val;
int i;
for (i = 0; i < insn->n; i++) {
val = data[i];
unsigned int val = data[i];
s->readback[chan] = val;
val <<= 4;
outb(val & 0xff, dev->iobase + DAS16_AO_LSB_REG(chan));
@@ -1163,6 +1165,11 @@ static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
s->maxdata = 0x0fff;
s->range_table = devpriv->user_ao_range_table;
s->insn_write = das16_ao_insn_write;
s->insn_read = comedi_readback_insn_read;
ret = comedi_alloc_subdev_readback(s);
if (ret)
return ret;
} else {
s->type = COMEDI_SUBD_UNUSED;
}