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staging: comedi: ni_mio_common: fix the (*insn_write) for the freq_out counter 

The (*insn_write) functions are supposed to write insn->n data values and
return the number of values written. For this subdevice it only makes sense
to write the last data value.

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 2014-05-28 16:26:53 -07:00 committed by Greg Kroah-Hartman
parent e63dabd00b
commit 00a92c03be
1 changed files with 15 additions and 9 deletions
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24
drivers/staging/comedi/drivers/ni_mio_common.c
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@ -3888,18 +3888,24 @@ static int ni_freq_out_insn_read(struct comedi_device *dev,
static int ni_freq_out_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data)
struct comedi_insn *insn,
unsigned int *data)
{
struct ni_private *devpriv = dev->private;
devpriv->clock_and_fout &= ~FOUT_Enable;
devpriv->stc_writew(dev, devpriv->clock_and_fout,
Clock_and_FOUT_Register);
devpriv->clock_and_fout &= ~FOUT_Divider_mask;
devpriv->clock_and_fout |= FOUT_Divider(data[0]);
devpriv->clock_and_fout |= FOUT_Enable;
devpriv->stc_writew(dev, devpriv->clock_and_fout,
Clock_and_FOUT_Register);
if (insn->n) {
devpriv->clock_and_fout &= ~FOUT_Enable;
devpriv->stc_writew(dev, devpriv->clock_and_fout,
Clock_and_FOUT_Register);
devpriv->clock_and_fout &= ~FOUT_Divider_mask;
/* use the last data value to set the fout divider */
devpriv->clock_and_fout |= FOUT_Divider(data[insn->n - 1]);
devpriv->clock_and_fout |= FOUT_Enable;
devpriv->stc_writew(dev, devpriv->clock_and_fout,
Clock_and_FOUT_Register);
}
return insn->n;
}