staging: comedi: ni_at_a2150: clarify 8254 timer programming

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.

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/ni_at_a2150.c b/drivers/staging/comedi/drivers/ni_at_a2150.c
index fefd97e..f8d6bfc 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_at_a2150.c
+++ b/drivers/staging/comedi/drivers/ni_at_a2150.c
@@ -403,6 +403,7 @@ static int a2150_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
        struct a2150_private *devpriv = dev->private;
        struct comedi_async *async = s->async;
        struct comedi_cmd *cmd = &async->cmd;
+       unsigned long timer_base = dev->iobase + I8253_BASE_REG;
        unsigned long lock_flags;
        unsigned int old_config_bits = devpriv->config_bits;
        unsigned int trigger_bits;
@@ -470,7 +471,8 @@ static int a2150_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
        outw(devpriv->irq_dma_bits, dev->iobase + IRQ_DMA_CNTRL_REG);
 
        /*  may need to wait 72 sampling periods if timing was changed */
-       i8254_load(dev->iobase + I8253_BASE_REG, 0, 2, 72, 0);
+       i8254_set_mode(timer_base, 0, 2, I8254_MODE0 | I8254_BINARY);
+       i8254_write(timer_base, 0, 2, 72);
 
        /*  setup start triggering */
        trigger_bits = 0;