From d7c0dcb65abda2842a1bff678a5297ed68431421 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 29 Apr 2014 12:59:51 -0700 Subject: [PATCH] staging: comedi: pcl711: fix 8254 timer programming As pointed out by Ian Abbott, the i8254_load() function does not use the I8254_MODE* values to specify the "mode". 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. For aesthetics, factor the timer programming out as a separate function. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/pcl711.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/drivers/staging/comedi/drivers/pcl711.c b/drivers/staging/comedi/drivers/pcl711.c index 7c03a5d17b1b..2da6fec6ab4c 100644 --- a/drivers/staging/comedi/drivers/pcl711.c +++ b/drivers/staging/comedi/drivers/pcl711.c @@ -360,6 +360,18 @@ static int pcl711_ai_cmdtest(struct comedi_device *dev, return 0; } +static void pcl711_ai_load_counters(struct comedi_device *dev) +{ + struct pcl711_private *devpriv = dev->private; + unsigned long timer_base = dev->iobase + PCL711_TIMER_BASE; + + i8254_set_mode(timer_base, 0, 1, I8254_MODE2 | I8254_BINARY); + i8254_set_mode(timer_base, 0, 2, I8254_MODE2 | I8254_BINARY); + + i8254_write(timer_base, 0, 1, devpriv->divisor1); + i8254_write(timer_base, 0, 2, devpriv->divisor2); +} + static int pcl711_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) { struct pcl711_private *devpriv = dev->private; @@ -378,13 +390,8 @@ static int pcl711_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) } if (cmd->scan_begin_src == TRIG_TIMER) { - i8254_load(dev->iobase + PCL711_TIMER_BASE, 0, - 1, devpriv->divisor1, I8254_MODE2 | I8254_BINARY); - i8254_load(dev->iobase + PCL711_TIMER_BASE, 0, - 2, devpriv->divisor2, I8254_MODE2 | I8254_BINARY); - + pcl711_ai_load_counters(dev); outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG); - pcl711_ai_set_mode(dev, PCL711_MODE_PACER_IRQ); } else { pcl711_ai_set_mode(dev, PCL711_MODE_EXT_IRQ); -- 2.20.1