diff options
| author | H Hartley Sweeten <hsweeten@visionengravers.com> | 2014-04-29 12:59:58 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-03 20:06:35 -0400 |
| commit | bef74ba884be09144f13b7132c060c2e5b0ec415 (patch) | |
| tree | 6af83ad3d5aa9f07a0a26db72b26a5d268033938 /drivers/staging/comedi | |
| parent | 22e09dff089fe93d6e3ef7cc0fb8f645a87153c6 (diff) | |
staging: comedi: das16m1: 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>
Diffstat (limited to 'drivers/staging/comedi')
| -rw-r--r-- | drivers/staging/comedi/drivers/das16m1.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/staging/comedi/drivers/das16m1.c b/drivers/staging/comedi/drivers/das16m1.c index 4fe30cc254e..c97444991d8 100644 --- a/drivers/staging/comedi/drivers/das16m1.c +++ b/drivers/staging/comedi/drivers/das16m1.c @@ -272,6 +272,7 @@ static int das16m1_cmd_exec(struct comedi_device *dev, struct das16m1_private_struct *devpriv = dev->private; struct comedi_async *async = s->async; struct comedi_cmd *cmd = &async->cmd; + unsigned long timer_base = dev->iobase + DAS16M1_8254_FIRST; unsigned int byte, i; /* disable interrupts and internal pacer */ @@ -283,11 +284,11 @@ static int das16m1_cmd_exec(struct comedi_device *dev, /* Initialize lower half of hardware counter, used to determine how * many samples are in fifo. Value doesn't actually load into counter * until counter's next clock (the next a/d conversion) */ - i8254_load(dev->iobase + DAS16M1_8254_FIRST, 0, 1, 0, 2); + i8254_set_mode(timer_base, 0, 1, I8254_MODE2 | I8254_BINARY); + i8254_write(timer_base, 0, 1, 0); /* remember current reading of counter so we know when counter has * actually been loaded */ - devpriv->initial_hw_count = - i8254_read(dev->iobase + DAS16M1_8254_FIRST, 0, 1); + devpriv->initial_hw_count = i8254_read(timer_base, 0, 1); /* setup channel/gain queue */ for (i = 0; i < cmd->chanlist_len; i++) { outb(i, dev->iobase + DAS16M1_QUEUE_ADDR); |