staging:iio:adis16204 replace unnecessary event line registration.

Whilst the adis16204 does indeed support events, currently the driver
does not.  The trigger code should never use that infrastructure.

Untested but identical in form to those that have been.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/accel/adis16204_core.c

@@ -432,14 +432,6 @@ static IIO_DEVICE_ATTR(reset, S_IWUSR, NULL, adis16204_write_reset, 0);
 
 static IIO_CONST_ATTR(name, "adis16204");
 
-static struct attribute *adis16204_event_attributes[] = {
-	NULL
-};
-
-static struct attribute_group adis16204_event_attribute_group = {
-	.attrs = adis16204_event_attributes,
-};
-
 static struct attribute *adis16204_attributes[] = {
 	&iio_dev_attr_in0_supply_raw.dev_attr.attr,
 	&iio_const_attr_in0_supply_scale.dev_attr.attr,
@@ -500,8 +492,6 @@ static int __devinit adis16204_probe(struct spi_device *spi)
 	}
 
 	st->indio_dev->dev.parent = &spi->dev;
-	st->indio_dev->num_interrupt_lines = 1;
-	st->indio_dev->event_attrs = &adis16204_event_attribute_group;
 	st->indio_dev->attrs = &adis16204_attribute_group;
 	st->indio_dev->dev_data = (void *)(st);
 	st->indio_dev->driver_module = THIS_MODULE;
@@ -523,17 +513,9 @@ static int __devinit adis16204_probe(struct spi_device *spi)
 	}
 
 	if (spi->irq) {
-		ret = iio_register_interrupt_line(spi->irq,
-				st->indio_dev,
-				0,
-				IRQF_TRIGGER_RISING,
-				"adis16204");
-		if (ret)
-			goto error_uninitialize_ring;
-
 		ret = adis16204_probe_trigger(st->indio_dev);
 		if (ret)
-			goto error_unregister_line;
+			goto error_uninitialize_ring;
 	}
 
 	/* Get the device into a sane initial state */
@@ -544,9 +526,6 @@ static int __devinit adis16204_probe(struct spi_device *spi)
 
 error_remove_trigger:
 	adis16204_remove_trigger(st->indio_dev);
-error_unregister_line:
-	if (spi->irq)
-		iio_unregister_interrupt_line(st->indio_dev, 0);
 error_uninitialize_ring:
 	adis16204_uninitialize_ring(st->indio_dev->ring);
 error_unreg_ring_funcs:
@@ -574,9 +553,6 @@ static int adis16204_remove(struct spi_device *spi)
 	flush_scheduled_work();
 
 	adis16204_remove_trigger(indio_dev);
-	if (spi->irq)
-		iio_unregister_interrupt_line(indio_dev, 0);
-
 	adis16204_uninitialize_ring(indio_dev->ring);
 	iio_device_unregister(indio_dev);
 	adis16204_unconfigure_ring(indio_dev);

drivers/staging/iio/accel/adis16204_trigger.c

@@ -15,21 +15,13 @@
 /**
  * adis16204_data_rdy_trig_poll() the event handler for the data rdy trig
  **/
-static int adis16204_data_rdy_trig_poll(struct iio_dev *dev_info,
-				       int index,
-				       s64 timestamp,
-				       int no_test)
+static irqreturn_t adis16204_data_rdy_trig_poll(int irq, void *private)
 {
-	struct adis16204_state *st = iio_dev_get_devdata(dev_info);
-	struct iio_trigger *trig = st->trig;
-
-	iio_trigger_poll(trig, timestamp);
-
+	disable_irq_nosync(irq);
+	iio_trigger_poll(private, iio_get_time_ns());
 	return IRQ_HANDLED;
 }
 
-IIO_EVENT_SH(data_rdy_trig, &adis16204_data_rdy_trig_poll);
-
 static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
 
 static struct attribute *adis16204_trigger_attrs[] = {
@@ -49,20 +41,9 @@ static int adis16204_data_rdy_trigger_set_state(struct iio_trigger *trig,
 {
 	struct adis16204_state *st = trig->private_data;
 	struct iio_dev *indio_dev = st->indio_dev;
-	int ret = 0;
 
 	dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
-	ret = adis16204_set_irq(&st->indio_dev->dev, state);
-	if (state == false) {
-		iio_remove_event_from_list(&iio_event_data_rdy_trig,
-					   &indio_dev->interrupts[0]
-					   ->ev_list);
-		flush_scheduled_work();
-	} else {
-		iio_add_event_to_list(&iio_event_data_rdy_trig,
-				      &indio_dev->interrupts[0]->ev_list);
-	}
-	return ret;
+	return adis16204_set_irq(&st->indio_dev->dev, state);
 }
 
 /**
@@ -82,12 +63,24 @@ int adis16204_probe_trigger(struct iio_dev *indio_dev)
 	struct adis16204_state *st = indio_dev->dev_data;
 
 	st->trig = iio_allocate_trigger();
+	if (st->trig == NULL) {
+		ret = -ENOMEM;
+		goto error_ret;
+	}
+	ret = request_irq(st->us->irq,
+			  adis16204_data_rdy_trig_poll,
+			  IRQF_TRIGGER_RISING,
+			  "adis16204",
+			  st->trig);
+	if (ret)
+		goto error_free_trig;
+
 	st->trig->name = kasprintf(GFP_KERNEL,
 				"adis16204-dev%d",
 				indio_dev->id);
 	if (!st->trig->name) {
 		ret = -ENOMEM;
-		goto error_free_trig;
+		goto error_free_irq;
 	}
 	st->trig->dev.parent = &st->us->dev;
 	st->trig->owner = THIS_MODULE;
@@ -106,9 +99,11 @@ int adis16204_probe_trigger(struct iio_dev *indio_dev)
 
 error_free_trig_name:
 	kfree(st->trig->name);
+error_free_irq:
+	free_irq(st->us->irq, st->trig);
 error_free_trig:
 	iio_free_trigger(st->trig);
-
+error_ret:
 	return ret;
 }
 
@@ -118,5 +113,6 @@ void adis16204_remove_trigger(struct iio_dev *indio_dev)
 
 	iio_trigger_unregister(state->trig);
 	kfree(state->trig->name);
+	free_irq(state->us->irq, state->trig);
 	iio_free_trigger(state->trig);
 }