As pointed out by Ian Abbott, the i8254_load() function does not
use the I8254_MODE* values to specify the "mode".
Refactor the 8254 timer programming to use the i8254_set_mode()
and i8254_write() helpers instead of i8254_load(). This allows
us to use the I8254_MODE* defines to clarify the code.
For aesthetics, factor the timer programming out as a separate
function.
Signed-off-by: H Hartley Sweeten <hswee...@visionengravers.com>
Cc: Ian Abbott <abbo...@mev.co.uk>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/staging/comedi/drivers/pcl711.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/staging/comedi/drivers/pcl711.c
b/drivers/staging/comedi/drivers/pcl711.c
index 7c03a5d..2da6fec 100644
--- a/drivers/staging/comedi/drivers/pcl711.c
+++ b/drivers/staging/comedi/drivers/pcl711.c
@@ -360,6 +360,18 @@ static int pcl711_ai_cmdtest(struct comedi_device *dev,
return 0;
}
+static void pcl711_ai_load_counters(struct comedi_device *dev)
+{
+ struct pcl711_private *devpriv = dev->private;
+ unsigned long timer_base = dev->iobase + PCL711_TIMER_BASE;
+
+ i8254_set_mode(timer_base, 0, 1, I8254_MODE2 | I8254_BINARY);
+ i8254_set_mode(timer_base, 0, 2, I8254_MODE2 | I8254_BINARY);
+
+ i8254_write(timer_base, 0, 1, devpriv->divisor1);
+ i8254_write(timer_base, 0, 2, devpriv->divisor2);
+}
+
static int pcl711_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
{
struct pcl711_private *devpriv = dev->private;
@@ -378,13 +390,8 @@ static int pcl711_ai_cmd(struct comedi_device *dev, struct
comedi_subdevice *s)
}
if (cmd->scan_begin_src == TRIG_TIMER) {
- i8254_load(dev->iobase + PCL711_TIMER_BASE, 0,
- 1, devpriv->divisor1, I8254_MODE2 | I8254_BINARY);
- i8254_load(dev->iobase + PCL711_TIMER_BASE, 0,
- 2, devpriv->divisor2, I8254_MODE2 | I8254_BINARY);
-
+ pcl711_ai_load_counters(dev);
outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG);
-
pcl711_ai_set_mode(dev, PCL711_MODE_PACER_IRQ);
} else {
pcl711_ai_set_mode(dev, PCL711_MODE_EXT_IRQ);
--
1.9.2
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