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staging: comedi: amplc_dio200: support multiple read/write of counter

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Change the `insn_read` and `insn_write` handlers of the '8254' counter
subdevices to support reading and writing multiple data values.
(Writing multiple values isn't very useful, but if that's what the user
wants....)

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott
2012-10-24 16:48:13 +01:00
committed by Greg Kroah-Hartman
parent c59515a879
commit fad18543ce
1 changed files with 14 additions and 10 deletions
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16
drivers/staging/comedi/drivers/amplc_dio200.c
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@@ -1270,13 +1270,15 @@ dio200_subdev_8254_read(struct comedi_device *dev, struct comedi_subdevice *s,
{
struct dio200_subdev_8254 *subpriv = s->private;
int chan = CR_CHAN(insn->chanspec);
unsigned int n;
unsigned long flags;
for (n = 0; n < insn->n; n++) {
spin_lock_irqsave(&subpriv->spinlock, flags);
data[0] = dio200_subdev_8254_read_chan(dev, s, chan);
data[n] = dio200_subdev_8254_read_chan(dev, s, chan);
spin_unlock_irqrestore(&subpriv->spinlock, flags);
return 1;
}
return insn->n;
}
/*
@@ -1288,13 +1290,15 @@ dio200_subdev_8254_write(struct comedi_device *dev, struct comedi_subdevice *s,
{
struct dio200_subdev_8254 *subpriv = s->private;
int chan = CR_CHAN(insn->chanspec);
unsigned int n;
unsigned long flags;
for (n = 0; n < insn->n; n++) {
spin_lock_irqsave(&subpriv->spinlock, flags);
dio200_subdev_8254_write_chan(dev, s, chan, data[0]);
dio200_subdev_8254_write_chan(dev, s, chan, data[n]);
spin_unlock_irqrestore(&subpriv->spinlock, flags);
return 1;
}
return insn->n;
}
/*