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Commit 9fdef9c8 authored by H Hartley Sweeten's avatar H Hartley Sweeten Committed by Greg Kroah-Hartman
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staging: comedi: pcl818: introduce pcl818_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 9fd3effa

drivers/staging/comedi/drivers/pcl818.c

+7 −3
Original line number Diff line number Diff line
@@ -406,6 +406,11 @@ static void pcl818_ai_clear_eoc(struct comedi_device *dev) 
	outb(0, dev->iobase + PCL818_CLRINT);

}



static void pcl818_ai_soft_trig(struct comedi_device *dev)

{

	/* writing any value triggers a software conversion */

	outb(0, dev->iobase + PCL818_AD_LO);

}



static unsigned int pcl818_ai_get_fifo_sample(struct comedi_device *dev,

					      struct comedi_subdevice *s,
@@ -915,7 +920,7 @@ static int pcl818_ai_cancel(struct comedi_device *dev, 
	     dev->iobase + PCL818_CONTROL);	/* Stop A/D */

	udelay(1);

	pcl818_start_pacer(dev, false);

	outb(0, dev->iobase + PCL818_AD_LO);

	pcl818_ai_soft_trig(dev);

	pcl818_ai_get_sample(dev, s, NULL);

	outb(0, dev->iobase + PCL818_CONTROL);	/* Stop A/D */

	pcl818_ai_clear_eoc(dev);
@@ -951,8 +956,7 @@ static int pcl818_ai_insn_read(struct comedi_device *dev, 


	for (i = 0; i < insn->n; i++) {

		pcl818_ai_clear_eoc(dev);

		/* start conversion */

		outb(0, dev->iobase + PCL818_AD_LO);

		pcl818_ai_soft_trig(dev);



		ret = comedi_timeout(dev, s, insn, pcl818_ai_eoc, 0);

		if (ret)