staging:iio:adc:ad7150 fix event codes.

I won't guarantee I got these right, but they are certainly closer than
the abuse of buffer event codes that was perviously in here.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/adc/ad7150.c

@@ -642,11 +642,6 @@ static const struct attribute_group ad7150_attribute_group = {
  * threshold events
  */
 
-#define IIO_EVENT_CODE_CH1_HIGH    IIO_BUFFER_EVENT_CODE(0)
-#define IIO_EVENT_CODE_CH1_LOW     IIO_BUFFER_EVENT_CODE(1)
-#define IIO_EVENT_CODE_CH2_HIGH    IIO_BUFFER_EVENT_CODE(2)
-#define IIO_EVENT_CODE_CH2_LOW     IIO_BUFFER_EVENT_CODE(3)
-
 static irqreturn_t ad7150_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
@@ -658,21 +653,33 @@ static irqreturn_t ad7150_event_handler(int irq, void *private)
 
 	if ((int_status & AD7150_STATUS_OUT1) && !(chip->old_state & AD7150_STATUS_OUT1))
 		iio_push_event(indio_dev, 0,
-				IIO_EVENT_CODE_CH1_HIGH,
+			       IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN,
+						    0,
+						    IIO_EV_TYPE_THRESH,
+						    IIO_EV_DIR_RISING),
 				timestamp);
 	else if ((!(int_status & AD7150_STATUS_OUT1)) && (chip->old_state & AD7150_STATUS_OUT1))
 		iio_push_event(indio_dev, 0,
-				IIO_EVENT_CODE_CH1_LOW,
-				timestamp);
+			       IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN,
+						    0,
+						    IIO_EV_TYPE_THRESH,
+						    IIO_EV_DIR_FALLING),
+			       timestamp);
 
 	if ((int_status & AD7150_STATUS_OUT2) && !(chip->old_state & AD7150_STATUS_OUT2))
 		iio_push_event(indio_dev, 0,
-				IIO_EVENT_CODE_CH2_HIGH,
-				timestamp);
+			       IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN,
+						    1,
+						    IIO_EV_TYPE_THRESH,
+						    IIO_EV_DIR_RISING),
+			       timestamp);
 	else if ((!(int_status & AD7150_STATUS_OUT2)) && (chip->old_state & AD7150_STATUS_OUT2))
 		iio_push_event(indio_dev, 0,
-				IIO_EVENT_CODE_CH2_LOW,
-				timestamp);
+			       IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN,
+						    1,
+						    IIO_EV_TYPE_THRESH,
+						    IIO_EV_DIR_FALLING),
+			       timestamp);
 	return IRQ_HANDLED;
 }