staging: comedi: pcl711: use 8253.h helper to set the timers

To better document the code, use the i8254_load() helper to set the
timers instead of doing the outb() instructions.

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>

diff --git a/drivers/staging/comedi/drivers/pcl711.c b/drivers/staging/comedi/drivers/pcl711.c
index 55a2b78..8aa7b0e 100644 (file)
--- a/drivers/staging/comedi/drivers/pcl711.c
+++ b/drivers/staging/comedi/drivers/pcl711.c
@@ -65,10 +65,7 @@ supported.
 /*
  * I/O port register map
  */
-#define PCL711_CTR0            0x00
-#define PCL711_CTR1            0x01
-#define PCL711_CTR2            0x02
-#define PCL711_CTRCTL          0x03
+#define PCL711_TIMER_BASE      0x00
 #define PCL711_AI_LSB_REG      0x04
 #define PCL711_AI_MSB_REG      0x05
 #define PCL711_AI_MSB_DRDY     (1 << 4)
@@ -380,27 +377,15 @@ static int pcl711_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
        pcl711_set_changain(dev, s, cmd->chanlist[0]);
 
        if (cmd->scan_begin_src == TRIG_TIMER) {
-               /*
-                *  Set timers
-                *      timer chip is an 8253, with timers 1 and 2
-                *      cascaded
-                *  0x74 = Select Counter 1 | LSB/MSB | Mode=2 | Binary
-                *        Mode 2 = Rate generator
-                *
-                *  0xb4 = Select Counter 2 | LSB/MSB | Mode=2 | Binary
-                */
-
                timer1 = timer2 = 0;
                i8253_cascade_ns_to_timer(i8253_osc_base, &timer1, &timer2,
                                          &cmd->scan_begin_arg,
                                          TRIG_ROUND_NEAREST);
 
-               outb(0x74, dev->iobase + PCL711_CTRCTL);
-               outb(timer1 & 0xff, dev->iobase + PCL711_CTR1);
-               outb((timer1 >> 8) & 0xff, dev->iobase + PCL711_CTR1);
-               outb(0xb4, dev->iobase + PCL711_CTRCTL);
-               outb(timer2 & 0xff, dev->iobase + PCL711_CTR2);
-               outb((timer2 >> 8) & 0xff, dev->iobase + PCL711_CTR2);
+               i8254_load(dev->iobase + PCL711_TIMER_BASE, 0,
+                          1, timer1, I8254_MODE2 | I8254_BINARY);
+               i8254_load(dev->iobase + PCL711_TIMER_BASE, 0,
+                          2, timer2, I8254_MODE2 | I8254_BINARY);
 
                /* clear pending interrupts (just in case) */
                outb(0, dev->iobase + PCL711_CLRINTR);