For aesthetics, define a macro for the pacer clock options and rename
the CamelCase.
Remove the unnecessary local variable in daqp_ai_cmd() used to set the
control register.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/quatech_daqp_cs.c | 20 +++++++++-----------
1 file changed, 9 insertions(+), 11 deletions(-)
diff --git a/drivers/staging/comedi/drivers/quatech_daqp_cs.c b/drivers/staging/comedi/drivers/quatech_daqp_cs.c
index 372aa58..899340a 100644
--- a/drivers/staging/comedi/drivers/quatech_daqp_cs.c
+++ b/drivers/staging/comedi/drivers/quatech_daqp_cs.c
@@ -81,10 +81,11 @@ struct daqp_private {
#define DAQP_SCANLIST_EXT_GAIN(x) ((x) << 4)
#define DAQP_SCANLIST_EXT_CHANNEL(x) (x)
-#define DAQP_CONTROL_PACER_100kHz 0xc0
-#define DAQP_CONTROL_PACER_1MHz 0x80
-#define DAQP_CONTROL_PACER_5MHz 0x40
-#define DAQP_CONTROL_PACER_EXTERNAL 0x00
+#define DAQP_CONTROL_PACER_CLK(x) (((x) & 0x3) << 6)
+#define DAQP_CONTROL_PACER_CLK_EXT DAQP_CONTROL_PACER_CLK(0)
+#define DAQP_CONTROL_PACER_CLK_5MHZ DAQP_CONTROL_PACER_CLK(1)
+#define DAQP_CONTROL_PACER_CLK_1MHZ DAQP_CONTROL_PACER_CLK(2)
+#define DAQP_CONTROL_PACER_CLK_100KHZ DAQP_CONTROL_PACER_CLK(3)
#define DAQP_CONTORL_EXPANSION 0x20
#define DAQP_CONTROL_EOS_INT_ENABLE 0x10
#define DAQP_CONTROL_FIFO_INT_ENABLE 0x08
@@ -434,7 +435,6 @@ static int daqp_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
struct comedi_cmd *cmd = &s->async->cmd;
int counter;
int threshold;
- int v;
if (devpriv->stop)
return -EIO;
@@ -547,12 +547,10 @@ static int daqp_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
outb((DAQP_FIFO_SIZE - threshold) & 0xff, dev->iobase + DAQP_FIFO);
outb((DAQP_FIFO_SIZE - threshold) >> 8, dev->iobase + DAQP_FIFO);
- /* Set trigger */
-
- v = DAQP_CONTROL_TRIGGER_CONTINUOUS | DAQP_CONTROL_TRIGGER_INTERNAL
- | DAQP_CONTROL_PACER_5MHz | DAQP_CONTROL_FIFO_INT_ENABLE;
-
- outb(v, dev->iobase + DAQP_CONTROL);
+ /* 5 MHz pacer, FIFO threshold interrupt, continuous internal trigger */
+ outb(DAQP_CONTROL_PACER_CLK_5MHZ | DAQP_CONTROL_FIFO_INT_ENABLE |
+ DAQP_CONTROL_TRIGGER_CONTINUOUS | DAQP_CONTROL_TRIGGER_INTERNAL,
+ dev->iobase + DAQP_CONTROL);
/* Reset any pending interrupts (my card has a tendency to require
* require multiple reads on the status register to achieve this)
--
2.5.1
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