From bef74ba884be09144f13b7132c060c2e5b0ec415 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 29 Apr 2014 12:59:58 -0700 Subject: [PATCH] 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 Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/das16m1.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/staging/comedi/drivers/das16m1.c b/drivers/staging/comedi/drivers/das16m1.c index 4fe30cc254e3..c97444991d89 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); -- 2.39.2