staging: comedi: hwdrv_apci3501: remove "magic" numbers in apci3501_read_insn_timer()

Use register bit defines from addi_tcw.h to remove the "magic" numbers.

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/addi-data/hwdrv_apci3501.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3501.c
index d971f7a0926f748966dc11d7f18cef82fa4362a9..375707497896f65fc562fdc1c35e4e5f67732f5d 100644 (file)
--- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3501.c
+++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3501.c
@@ -133,7 +133,8 @@ static int apci3501_read_insn_timer(struct comedi_device *dev,
            devpriv->timer_mode != ADDIDATA_WATCHDOG)
                return -EINVAL;
 
-       data[0] = inl(devpriv->tcw + ADDI_TCW_STATUS_REG) & 0x1;
+       data[0] = inl(devpriv->tcw + ADDI_TCW_STATUS_REG) &
+                 ADDI_TCW_STATUS_OVERFLOW;
        data[1] = inl(devpriv->tcw + ADDI_TCW_VAL_REG);
 
        return insn->n;