staging: comedi: cb_pcidas: tidy up dac08_write()

Rename this function so it has namespace associated with the driver.
Also rename the 'value' parameter to avoid having to split the line
to keep it under 80 chars.

Remove the unnecessary masking on the '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>

drivers/staging/comedi/drivers/cb_pcidas.c

@@ -581,21 +581,19 @@ static int cb_pcidas_caldac_insn_write(struct comedi_device *dev,
 	return insn->n;
 }
 
-/* 1602/16 pregain offset */
-static void dac08_write(struct comedi_device *dev, unsigned int value)
+static void cb_pcidas_dac08_write(struct comedi_device *dev, unsigned int val)
 {
 	struct cb_pcidas_private *devpriv = dev->private;
 
-	value &= 0xff;
-	value |= cal_enable_bits(dev);
+	val |= cal_enable_bits(dev);
 
 	/* latch the new value into the caldac */
-	outw(value, devpriv->pcibar1 + PCIDAS_CALIB_REG);
+	outw(val, devpriv->pcibar1 + PCIDAS_CALIB_REG);
 	udelay(1);
-	outw(value | PCIDAS_CALIB_DAC08_SEL,
+	outw(val | PCIDAS_CALIB_DAC08_SEL,
 	     devpriv->pcibar1 + PCIDAS_CALIB_REG);
 	udelay(1);
-	outw(value, devpriv->pcibar1 + PCIDAS_CALIB_REG);
+	outw(val, devpriv->pcibar1 + PCIDAS_CALIB_REG);
 	udelay(1);
 }
 
@@ -610,7 +608,7 @@ static int cb_pcidas_dac08_insn_write(struct comedi_device *dev,
 		unsigned int val = data[insn->n - 1];
 
 		if (s->readback[chan] != val) {
-			dac08_write(dev, val);
+			cb_pcidas_dac08_write(dev, val);
 			s->readback[chan] = val;
 		}
 	}
@@ -1415,7 +1413,7 @@ static int cb_pcidas_auto_attach(struct comedi_device *dev,
 		s->readback[i] = s->maxdata / 2;
 	}
 
-	/* Calibration subdevice - dac08 caldac */
+	/* Calibration subdevice - pci-das1602/16 pregain offset (dac08) */
 	s = &dev->subdevices[6];
 	if (board->has_dac08) {
 		s->type		= COMEDI_SUBD_CALIB;
@@ -1429,7 +1427,7 @@ static int cb_pcidas_auto_attach(struct comedi_device *dev,
 			return ret;
 
 		for (i = 0; i < s->n_chan; i++) {
-			dac08_write(dev, s->maxdata / 2);
+			cb_pcidas_dac08_write(dev, s->maxdata / 2);
 			s->readback[i] = s->maxdata / 2;
 		}
 	} else {