staging: comedi: pcl812: define the status register bits

Define the bits in the status register.

Writing any value to the status register clears any pending interrupt.
For aesthetics, rename the status register and remove the "clrint"
register.

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/pcl812.c b/drivers/staging/comedi/drivers/pcl812.c
index 7d13a99e3f5d4819df841478ce78bf2948cc8504..7e105c872b95d6c5b4eea137c54d5bb727fba84e 100644 (file)
--- a/drivers/staging/comedi/drivers/pcl812.c
+++ b/drivers/staging/comedi/drivers/pcl812.c
@@ -139,7 +139,8 @@
 #define PCL812_AO_MSB_REG(x)                   (0x05 + ((x) * 2))
 #define PCL812_DI_LSB_REG                      0x06
 #define PCL812_DI_MSB_REG                      0x07
-#define PCL812_CLRINT        8
+#define PCL812_STATUS_REG                      0x08
+#define PCL812_STATUS_DRDY                     (1 << 5)
 #define PCL812_GAIN          9
 #define PCL812_MUX          10
 #define PCL812_MODE         11
@@ -148,10 +149,6 @@
 #define PCL812_DO_LSB_REG                      0x0d
 #define PCL812_DO_MSB_REG                      0x0e
 
-#define ACL8216_STATUS       8 /* 5. bit signalize data ready */
-
-#define ACL8216_DRDY      0x20 /* =0 data ready */
-
 #define MAX_CHANLIST_LEN    256        /* length of scan list */
 
 static const struct comedi_lrange range_pcl812pg_ai = {
@@ -639,7 +636,7 @@ static void pcl812_ai_setup_next_dma(struct comedi_device *dev,
 static void pcl812_ai_clear_eoc(struct comedi_device *dev)
 {
        /* writing any value clears the interrupt request */
-       outb(0, dev->iobase + PCL812_CLRINT);
+       outb(0, dev->iobase + PCL812_STATUS_REG);
 }
 
 static void pcl812_ai_soft_trig(struct comedi_device *dev)
@@ -667,8 +664,8 @@ static int pcl812_ai_eoc(struct comedi_device *dev,
        unsigned int status;
 
        if (s->maxdata > 0x0fff) {
-               status = inb(dev->iobase + ACL8216_STATUS);
-               if ((status & ACL8216_DRDY) == 0)
+               status = inb(dev->iobase + PCL812_STATUS_REG);
+               if ((status & PCL812_STATUS_DRDY) == 0)
                        return 0;
        } else {
                status = inb(dev->iobase + PCL812_AI_MSB_REG);