staging: comedi: pcl818: use comedi_subdevice 'readback'
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>
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@ -319,7 +319,6 @@ struct pcl818_private {
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unsigned int act_chanlist_len; /* how long is actual MUX list */
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unsigned int act_chanlist_pos; /* actual position in MUX list */
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unsigned int ai_data_len; /* len of data buffer */
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unsigned int ao_readback[2];
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unsigned int divisor1;
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unsigned int divisor2;
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unsigned int usefifo:1;
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@ -937,32 +936,18 @@ static int pcl818_ao_insn_write(struct comedi_device *dev,
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struct comedi_insn *insn,
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unsigned int *data)
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{
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struct pcl818_private *devpriv = dev->private;
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unsigned int chan = CR_CHAN(insn->chanspec);
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unsigned int val = s->readback[chan];
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int i;
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for (i = 0; i < insn->n; i++) {
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devpriv->ao_readback[chan] = data[i];
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outb((data[i] & 0x000f) << 4,
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val = data[i];
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outb((val & 0x000f) << 4,
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dev->iobase + PCL818_AO_LSB_REG(chan));
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outb((data[i] & 0x0ff0) >> 4,
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outb((val & 0x0ff0) >> 4,
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dev->iobase + PCL818_AO_MSB_REG(chan));
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}
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return insn->n;
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}
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static int pcl818_ao_insn_read(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn,
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unsigned int *data)
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{
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struct pcl818_private *devpriv = dev->private;
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unsigned int chan = CR_CHAN(insn->chanspec);
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int i;
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for (i = 0; i < insn->n; i++)
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data[i] = devpriv->ao_readback[chan];
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s->readback[chan] = val;
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return insn->n;
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}
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@ -1172,8 +1157,6 @@ static int pcl818_attach(struct comedi_device *dev, struct comedi_devconfig *it)
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s->n_chan = board->n_aochan;
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s->maxdata = 0x0fff;
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s->range_table = &range_unipolar5;
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s->insn_read = pcl818_ao_insn_read;
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s->insn_write = pcl818_ao_insn_write;
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if (board->is_818) {
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if ((it->options[4] == 1) || (it->options[4] == 10))
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s->range_table = &range_unipolar10;
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@ -1185,6 +1168,12 @@ static int pcl818_attach(struct comedi_device *dev, struct comedi_devconfig *it)
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if (it->options[5] == 2)
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s->range_table = &range_unknown;
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}
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s->insn_write = pcl818_ao_insn_write;
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s->insn_read = comedi_readback_insn_read;
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ret = comedi_alloc_subdev_readback(s);
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if (ret)
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return ret;
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} else {
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s->type = COMEDI_SUBD_UNUSED;
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}
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