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staging: comedi: pcl726: enable the interrupt support code 

Tidy up and enable the interrupt support code for the external trigger
source interrupt on the ACL-6126 board.

The interrupt handler is currently just a stub function. Once the async
command support is added this function will be completed.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-09-25 15:36:57 -07:00 committed by Greg Kroah-Hartman
parent 87d9bc40bc
commit fff4620724
1 changed files with 17 additions and 32 deletions
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49
drivers/staging/comedi/drivers/pcl726.c
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@ -63,9 +63,9 @@ Interrupts are not supported.
*/
#include <linux/module.h>
#include "../comedidev.h"
#include <linux/interrupt.h>
#undef ACL6126_IRQ /* no interrupt support (yet) */
#include "../comedidev.h"
#define PCL726_SIZE 16
#define PCL727_SIZE 32
@ -173,6 +173,11 @@ struct pcl726_private {
unsigned int ao_readback[12];
};
static irqreturn_t pcl818_interrupt(int irq, void *d)
{
return IRQ_HANDLED;
}
static int pcl726_ao_insn_write(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn,
@ -254,9 +259,6 @@ static int pcl726_attach(struct comedi_device *dev, struct comedi_devconfig *it)
struct pcl726_private *devpriv;
struct comedi_subdevice *s;
int ret, i;
#ifdef ACL6126_IRQ
unsigned int irq;
#endif
ret = comedi_request_region(dev, it->options[0], board->io_range);
if (ret)
@ -269,36 +271,19 @@ static int pcl726_attach(struct comedi_device *dev, struct comedi_devconfig *it)
for (i = 0; i < 12; i++)
devpriv->rangelist[i] = &range_unknown;
#ifdef ACL6126_IRQ
irq = 0;
if (boardtypes[board].IRQbits != 0) { /* board support IRQ */
irq = it->options[1];
devpriv->first_chan = 2;
if (irq) { /* we want to use IRQ */
if (((1 << irq) & boardtypes[board].IRQbits) == 0) {
printk(KERN_WARNING
", IRQ %d is out of allowed range,"
" DISABLING IT", irq);
irq = 0; /* Bad IRQ */
} else {
if (request_irq(irq, interrupt_pcl818, 0,
dev->board_name, dev)) {
printk(KERN_WARNING
", unable to allocate IRQ %d,"
" DISABLING IT", irq);
irq = 0; /* Can't use IRQ */
} else {
printk(", irq=%d", irq);
}
}
/*
* Hook up the external trigger source interrupt only if the
* user config option is valid and the board supports interrupts.
*/
if (it->options[1] && (board->IRQbits & (1 << it->options[1]))) {
ret = request_irq(it->options[1], pcl818_interrupt, 0,
dev->board_name, dev);
if (ret == 0) {
/* External trigger source is from Pin-17 of CN3 */
dev->irq = it->options[1];
}
}
dev->irq = irq;
#endif
printk("\n");
ret = comedi_alloc_subdevices(dev, 3);
if (ret)
return ret;