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Subject[PATCH 4/6] staging: comedi: addi_apci_1564: add a subdevice for Change-of-State interrupt support
Date
This board supports an interrupt that can be generated by an AND/OR
combination of 16 of the input channels.

Create a separate subdevice to handle this interrupt.

Signed-off-by: Chase Southwood <chase.southwood@gmail.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: H Hartley Sweeten <hsweeten@visionengravers.com>
---
drivers/staging/comedi/drivers/addi_apci_1564.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/comedi/drivers/addi_apci_1564.c b/drivers/staging/comedi/drivers/addi_apci_1564.c
index 5901143..183fdc3 100644
--- a/drivers/staging/comedi/drivers/addi_apci_1564.c
+++ b/drivers/staging/comedi/drivers/addi_apci_1564.c
@@ -105,7 +105,7 @@ static int apci1564_auto_attach(struct comedi_device *dev,
dev->irq = pcidev->irq;
}

- ret = comedi_alloc_subdevices(dev, 3);
+ ret = comedi_alloc_subdevices(dev, 4);
if (ret)
return ret;

@@ -144,6 +144,20 @@ static int apci1564_auto_attach(struct comedi_device *dev,
s->insn_read = apci1564_timer_read;
s->insn_config = apci1564_timer_config;

+ /* Change-Of-State (COS) interrupt subdevice */
+ s = &dev->subdevices[3];
+ if (dev->irq) {
+ dev->read_subdev = s;
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
+ s->n_chan = 1;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->len_chanlist = 1;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
return 0;
}

--
1.9.3


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