From: H Hartley Sweeten Date: Tue, 4 Mar 2014 18:30:07 +0000 (-0700) Subject: staging: comedi: pcl816: introduce pcl816_ai_soft_trig() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=939d33d688e208a2c8ff0f083704c15b0c11d4ee;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git staging: comedi: pcl816: introduce pcl816_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 --- diff --git a/drivers/staging/comedi/drivers/pcl816.c b/drivers/staging/comedi/drivers/pcl816.c index 40fd27789886..f77bc68ba12f 100644 --- a/drivers/staging/comedi/drivers/pcl816.c +++ b/drivers/staging/comedi/drivers/pcl816.c @@ -214,6 +214,12 @@ static void pcl816_ai_clear_eoc(struct comedi_device *dev) outb(0, dev->iobase + PCL816_CLRINT); } +static void pcl816_ai_soft_trig(struct comedi_device *dev) +{ + /* writing any value triggers a software conversion */ + outb(0, dev->iobase + PCL816_AD_LO); +} + static unsigned int pcl816_ai_get_sample(struct comedi_device *dev, struct comedi_subdevice *s) { @@ -508,7 +514,7 @@ static int pcl816_ai_cancel(struct comedi_device *dev, i8254_set_mode(dev->iobase + PCL816_TIMER_BASE, 0, 1, I8254_MODE0 | I8254_BINARY); - outb(0, dev->iobase + PCL816_AD_LO); + pcl816_ai_soft_trig(dev); pcl816_ai_get_sample(dev, s); pcl816_ai_clear_eoc(dev); @@ -619,8 +625,7 @@ static int pcl816_ai_insn_read(struct comedi_device *dev, for (i = 0; i < insn->n; i++) { pcl816_ai_clear_eoc(dev); - /* start conversion */ - outb(0, dev->iobase + PCL816_AD_LO); + pcl816_ai_soft_trig(dev); ret = comedi_timeout(dev, s, insn, pcl816_ai_eoc, 0); if (ret)