From 1e66bb255e42e4d16d345dae5b5e5d1b2d0bea41 Mon Sep 17 00:00:00 2001 From: H Hartley Sweeten Date: Tue, 4 Mar 2014 11:30:08 -0700 Subject: [PATCH] staging: comedi: pcl812: introduce pcl812_ai_soft_trig() Introduce a helper function to start a software triggered analog input conversion. Signed-off-by: H Hartley Sweeten Reviewed-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/staging/comedi/drivers/pcl812.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/staging/comedi/drivers/pcl812.c b/drivers/staging/comedi/drivers/pcl812.c index b41dbbc5e38e..9fb3e848ac7e 100644 --- a/drivers/staging/comedi/drivers/pcl812.c +++ b/drivers/staging/comedi/drivers/pcl812.c @@ -643,6 +643,12 @@ static void pcl812_ai_clear_eoc(struct comedi_device *dev) outb(0, dev->iobase + PCL812_CLRINT); } +static void pcl812_ai_soft_trig(struct comedi_device *dev) +{ + /* writing any value triggers a software conversion */ + outb(255, dev->iobase + PCL812_SOFTTRIG); +} + static unsigned int pcl812_ai_get_sample(struct comedi_device *dev, struct comedi_subdevice *s) { @@ -1028,8 +1034,7 @@ static int pcl812_ai_insn_read(struct comedi_device *dev, for (i = 0; i < insn->n; i++) { pcl812_ai_clear_eoc(dev); - /* start conversion */ - outb(255, dev->iobase + PCL812_SOFTTRIG); + pcl812_ai_soft_trig(dev); ret = comedi_timeout(dev, s, insn, pcl812_ai_eoc, 0); if (ret) -- 2.34.1