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Commit 939d33d6 authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
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staging: comedi: pcl816: introduce pcl816_ai_soft_trig() 



Introduce a helper function to start a software triggered analog input
conversion.

Signed-off-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: default avatarIan Abbott <abbotti@mev.co.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9fdef9c8

drivers/staging/comedi/drivers/pcl816.c

+8 −3
Original line number Diff line number Diff line
@@ -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)