staging:iio: remove broken support for multiple event interfaces.

We don't have a use case for these.  Two drivers appeared to use them
but both report all events on the first.

V2: Remove now irrelevant comment.
V3: Include fixup for adc/ad7280a.c

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>

17 files changed, 127 insertions, 159 deletions

diff --git a/drivers/staging/iio/accel/lis3l02dq_core.c b/drivers/staging/iio/accel/lis3l02dq_core.c
index 440b26bff349..b57bf5029509 100644
--- a/drivers/staging/iio/accel/lis3l02dq_core.c
+++ b/drivers/staging/iio/accel/lis3l02dq_core.c
@@ -452,7 +452,7 @@ static irqreturn_t lis3l02dq_event_handler(int irq, void *private)
 				 &t);
 
 	if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Z_HIGH)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
 						  0,
 						  IIO_MOD_Z,
@@ -461,7 +461,7 @@ static irqreturn_t lis3l02dq_event_handler(int irq, void *private)
 			       timestamp);
 
 	if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Z_LOW)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
 						  0,
 						  IIO_MOD_Z,
@@ -470,7 +470,7 @@ static irqreturn_t lis3l02dq_event_handler(int irq, void *private)
 			       timestamp);
 
 	if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Y_HIGH)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
 						  0,
 						  IIO_MOD_Y,
@@ -479,7 +479,7 @@ static irqreturn_t lis3l02dq_event_handler(int irq, void *private)
 			       timestamp);
 
 	if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Y_LOW)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
 						  0,
 						  IIO_MOD_Y,
@@ -488,7 +488,7 @@ static irqreturn_t lis3l02dq_event_handler(int irq, void *private)
 			       timestamp);
 
 	if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_X_HIGH)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
 						  0,
 						  IIO_MOD_X,
@@ -497,7 +497,7 @@ static irqreturn_t lis3l02dq_event_handler(int irq, void *private)
 			       timestamp);
 
 	if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_X_LOW)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
 						  0,
 						  IIO_MOD_X,
@@ -651,7 +651,6 @@ static const struct attribute_group lis3l02dq_attribute_group = {
 };
 
 static const struct iio_info lis3l02dq_info = {
-	.num_interrupt_lines = 1,
 	.read_raw = &lis3l02dq_read_raw,
 	.write_raw = &lis3l02dq_write_raw,
 	.read_event_value = &lis3l02dq_read_thresh,
diff --git a/drivers/staging/iio/accel/sca3000_core.c b/drivers/staging/iio/accel/sca3000_core.c
index 1a6780f9c5a5..449020054eef 100644
--- a/drivers/staging/iio/accel/sca3000_core.c
+++ b/drivers/staging/iio/accel/sca3000_core.c
@@ -815,7 +815,7 @@ static irqreturn_t sca3000_event_handler(int irq, void *private)
 	sca3000_ring_int_process(val, indio_dev->ring);
 
 	if (val & SCA3000_INT_STATUS_FREE_FALL)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
 						  0,
 						  IIO_MOD_X_AND_Y_AND_Z,
@@ -824,7 +824,7 @@ static irqreturn_t sca3000_event_handler(int irq, void *private)
 			       last_timestamp);
 
 	if (val & SCA3000_INT_STATUS_Y_TRIGGER)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
 						  0,
 						  IIO_MOD_Y,
@@ -833,7 +833,7 @@ static irqreturn_t sca3000_event_handler(int irq, void *private)
 			       last_timestamp);
 
 	if (val & SCA3000_INT_STATUS_X_TRIGGER)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
 						  0,
 						  IIO_MOD_X,
@@ -842,7 +842,7 @@ static irqreturn_t sca3000_event_handler(int irq, void *private)
 			       last_timestamp);
 
 	if (val & SCA3000_INT_STATUS_Z_TRIGGER)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_MOD_EVENT_CODE(IIO_ACCEL,
 						  0,
 						  IIO_MOD_Z,
@@ -1103,7 +1103,6 @@ error_ret:
 static const struct iio_info sca3000_info = {
 	.attrs = &sca3000_attribute_group,
 	.read_raw = &sca3000_read_raw,
-	.num_interrupt_lines = 1,
 	.event_attrs = &sca3000_event_attribute_group,
 	.read_event_value = &sca3000_read_thresh,
 	.write_event_value = &sca3000_write_thresh,
diff --git a/drivers/staging/iio/adc/ad7150.c b/drivers/staging/iio/adc/ad7150.c
index 9fd108776d52..d70623c10489 100644
--- a/drivers/staging/iio/adc/ad7150.c
+++ b/drivers/staging/iio/adc/ad7150.c
@@ -653,30 +653,34 @@ static irqreturn_t ad7150_event_handler(int irq, void *private)
 
 	ad7150_i2c_read(chip, AD7150_STATUS, &int_status, 1);
 
-	if ((int_status & AD7150_STATUS_OUT1) && !(chip->old_state & AD7150_STATUS_OUT1))
-		iio_push_event(indio_dev, 0,
+	if ((int_status & AD7150_STATUS_OUT1) &&
+	    !(chip->old_state & AD7150_STATUS_OUT1))
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_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,
+	else if ((!(int_status & AD7150_STATUS_OUT1)) &&
+		 (chip->old_state & AD7150_STATUS_OUT1))
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_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,
+	if ((int_status & AD7150_STATUS_OUT2) &&
+	    !(chip->old_state & AD7150_STATUS_OUT2))
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_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,
+	else if ((!(int_status & AD7150_STATUS_OUT2)) &&
+		 (chip->old_state & AD7150_STATUS_OUT2))
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_IN,
 						    1,
 						    IIO_EV_TYPE_THRESH,
@@ -705,7 +709,6 @@ static struct attribute_group ad7150_event_attribute_group = {
 
 static const struct iio_info ad7150_info = {
 	.attrs = &ad7150_attribute_group,
-	.num_interrupt_lines = 1,
 	.event_attrs = &ad7150_event_attribute_group,
 	.driver_module = THIS_MODULE,
 };
diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
index ab6cf9cb5a7f..bdc325dcb5b6 100644
--- a/drivers/staging/iio/adc/ad7280a.c
+++ b/drivers/staging/iio/adc/ad7280a.c
@@ -691,7 +691,7 @@ static irqreturn_t ad7280_event_handler(int irq, void *private)
 		if (((channels[i] >> 23) & 0xF) <= AD7280A_CELL_VOLTAGE_6) {
 			if (((channels[i] >> 11) & 0xFFF) >=
 				st->cell_threshhigh)
-				iio_push_event(dev_info, 0,
+				iio_push_event(dev_info,
 					IIO_UNMOD_EVENT_CODE(IIO_IN_DIFF,
 					0,
 					IIO_EV_TYPE_THRESH,
@@ -699,7 +699,7 @@ static irqreturn_t ad7280_event_handler(int irq, void *private)
 					iio_get_time_ns());
 			else if (((channels[i] >> 11) & 0xFFF) <=
 				st->cell_threshlow)
-				iio_push_event(dev_info, 0,
+				iio_push_event(dev_info,
 					IIO_UNMOD_EVENT_CODE(IIO_IN_DIFF,
 					0,
 					IIO_EV_TYPE_THRESH,
@@ -707,7 +707,7 @@ static irqreturn_t ad7280_event_handler(int irq, void *private)
 					iio_get_time_ns());
 		} else {
 			if (((channels[i] >> 11) & 0xFFF) >= st->aux_threshhigh)
-				iio_push_event(dev_info, 0,
+				iio_push_event(dev_info,
 					IIO_UNMOD_EVENT_CODE(IIO_TEMP,
 					0,
 					IIO_EV_TYPE_THRESH,
@@ -715,7 +715,7 @@ static irqreturn_t ad7280_event_handler(int irq, void *private)
 					iio_get_time_ns());
 			else if (((channels[i] >> 11) & 0xFFF) <=
 				st->aux_threshlow)
-				iio_push_event(dev_info, 0,
+				iio_push_event(dev_info,
 					IIO_UNMOD_EVENT_CODE(IIO_TEMP,
 					0,
 					IIO_EV_TYPE_THRESH,
@@ -809,7 +809,6 @@ static int ad7280_read_raw(struct iio_dev *dev_info,
 
 static const struct iio_info ad7280_info = {
 	.read_raw = &ad7280_read_raw,
-	.num_interrupt_lines = 1,
 	.event_attrs = &ad7280_event_attrs_group,
 	.attrs = &ad7280_attrs_group,
 	.driver_module = THIS_MODULE,
diff --git a/drivers/staging/iio/adc/ad7291.c b/drivers/staging/iio/adc/ad7291.c
index e884c78d8047..ac7c04ea4a28 100644
--- a/drivers/staging/iio/adc/ad7291.c
+++ b/drivers/staging/iio/adc/ad7291.c
@@ -479,28 +479,28 @@ static irqreturn_t ad7291_event_handler(int irq, void *private)
 	ad7291_i2c_write(chip, AD7291_COMMAND, command);
 
 	if (t_status & (1 << 0))
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_TEMP,
 						    0,
 						    IIO_EV_TYPE_THRESH,
 						    IIO_EV_DIR_FALLING),
 			       timestamp);
 	if (t_status & (1 << 1))
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_TEMP,
 						    0,
 						    IIO_EV_TYPE_THRESH,
 						    IIO_EV_DIR_RISING),
 			       timestamp);
 	if (t_status & (1 << 2))
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_TEMP,
 						    0,
 						    IIO_EV_TYPE_THRESH,
 						    IIO_EV_DIR_FALLING),
 			       timestamp);
 	if (t_status & (1 << 3))
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_TEMP,
 						    0,
 						    IIO_EV_TYPE_THRESH,
@@ -509,14 +509,14 @@ static irqreturn_t ad7291_event_handler(int irq, void *private)
 
 	for (i = 0; i < AD7291_VOLTAGE_LIMIT_COUNT*2; i += 2) {
 		if (v_status & (1 << i))
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       IIO_UNMOD_EVENT_CODE(IIO_IN,
 							    i/2,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_FALLING),
 				       timestamp);
 		if (v_status & (1 << (i + 1)))
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       IIO_UNMOD_EVENT_CODE(IIO_IN,
 							    i/2,
 							    IIO_EV_TYPE_THRESH,
@@ -780,7 +780,6 @@ static struct attribute_group ad7291_event_attribute_group = {
 
 static const struct iio_info ad7291_info = {
 	.attrs = &ad7291_attribute_group,
-	.num_interrupt_lines = 1,
 	.event_attrs = &ad7291_event_attribute_group,
 };
 
diff --git a/drivers/staging/iio/adc/ad7745.c b/drivers/staging/iio/adc/ad7745.c
index 414e6dd0d1d7..41150c60c209 100644
--- a/drivers/staging/iio/adc/ad7745.c
+++ b/drivers/staging/iio/adc/ad7745.c
@@ -540,12 +540,12 @@ static irqreturn_t ad774x_event_handler(int irq, void *private)
 	ad774x_i2c_read(chip, AD774X_STATUS, &int_status, 1);
 
 	if (int_status & AD774X_STATUS_RDYCAP)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_EVENT_CODE_CAP_RDY,
 			       iio_get_time_ns());
 
 	if (int_status & AD774X_STATUS_RDYVT)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_EVENT_CODE_VT_RDY,
 			       iio_get_time_ns());
 
@@ -569,7 +569,6 @@ static struct attribute_group ad774x_event_attribute_group = {
 static const struct iio_info ad774x_info = {
 	.attrs = &ad774x_event_attribute_group,
 	.event_attrs = &ad774x_event_attribute_group,
-	.num_interrupt_lines = 1,
 	.driver_module = THIS_MODULE,
 };
 /*
diff --git a/drivers/staging/iio/adc/ad7816.c b/drivers/staging/iio/adc/ad7816.c
index 8104ef470450..2706de30bc8e 100644
--- a/drivers/staging/iio/adc/ad7816.c
+++ b/drivers/staging/iio/adc/ad7816.c
@@ -254,9 +254,7 @@ static const struct attribute_group ad7816_attribute_group = {
 
 static irqreturn_t ad7816_event_handler(int irq, void *private)
 {
-	iio_push_event(private, 0,
-		       IIO_EVENT_CODE_AD7816_OTI,
-		       iio_get_time_ns());
+	iio_push_event(private, IIO_EVENT_CODE_AD7816_OTI, iio_get_time_ns());
 	return IRQ_HANDLED;
 }
 
@@ -334,7 +332,6 @@ static struct attribute_group ad7816_event_attribute_group = {
 
 static const struct iio_info ad7816_info = {
 	.attrs = &ad7816_attribute_group,
-	.num_interrupt_lines = 1,
 	.event_attrs = &ad7816_event_attribute_group,
 	.driver_module = THIS_MODULE,
 };
diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c
index ba6d4ed0d609..b21e8688afd8 100644
--- a/drivers/staging/iio/adc/ad799x_core.c
+++ b/drivers/staging/iio/adc/ad799x_core.c
@@ -334,7 +334,7 @@ static irqreturn_t ad799x_event_handler(int irq, void *private)
 
 	for (i = 0; i < 8; i++) {
 		if (status & (1 << i))
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       i & 0x1 ?
 				       IIO_UNMOD_EVENT_CODE(IIO_IN,
 							    (i >> 1),
@@ -474,14 +474,12 @@ static const struct iio_info ad7991_info = {
 
 static const struct iio_info ad7992_info = {
 	.read_raw = &ad799x_read_raw,
-	.num_interrupt_lines = 1,
 	.event_attrs = &ad7992_event_attrs_group,
 	.driver_module = THIS_MODULE,
 };
 
 static const struct iio_info ad7993_4_7_8_info = {
 	.read_raw = &ad799x_read_raw,
-	.num_interrupt_lines = 1,
 	.event_attrs = &ad7993_4_7_8_event_attrs_group,
 	.driver_module = THIS_MODULE,
 };
diff --git a/drivers/staging/iio/adc/adt7310.c b/drivers/staging/iio/adc/adt7310.c
index b55066f0b236..e002e979035d 100644
--- a/drivers/staging/iio/adc/adt7310.c
+++ b/drivers/staging/iio/adc/adt7310.c
@@ -400,19 +400,19 @@ static irqreturn_t adt7310_event_handler(int irq, void *private)
 		return ret;
 
 	if (status & ADT7310_STAT_T_HIGH)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
 						    IIO_EV_TYPE_THRESH,
 						    IIO_EV_DIR_RISING),
 			       timestamp);
 	if (status & ADT7310_STAT_T_LOW)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
 						    IIO_EV_TYPE_THRESH,
 						    IIO_EV_DIR_FALLING),
 			       timestamp);
 	if (status & ADT7310_STAT_T_CRIT)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
 						    IIO_EV_TYPE_THRESH,
 						    IIO_EV_DIR_RISING),
@@ -750,7 +750,6 @@ static struct attribute_group adt7310_event_attribute_group[ADT7310_IRQS] = {
 
 static const struct iio_info adt7310_info = {
 	.attrs = &adt7310_attribute_group,
-	.num_interrupt_lines = ADT7310_IRQS,
 	.event_attrs = adt7310_event_attribute_group,
 	.driver_module = THIS_MODULE,
 };
diff --git a/drivers/staging/iio/adc/adt7410.c b/drivers/staging/iio/adc/adt7410.c
index 2e56ae866dd8..e7e9e25d1e93 100644
--- a/drivers/staging/iio/adc/adt7410.c
+++ b/drivers/staging/iio/adc/adt7410.c
@@ -366,19 +366,19 @@ static irqreturn_t adt7410_event_handler(int irq, void *private)
 		return IRQ_HANDLED;
 
 	if (status & ADT7410_STAT_T_HIGH)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
 						    IIO_EV_TYPE_THRESH,
 						    IIO_EV_DIR_RISING),
 			       timestamp);
 	if (status & ADT7410_STAT_T_LOW)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
 						    IIO_EV_TYPE_THRESH,
 						    IIO_EV_DIR_FALLING),
 			       timestamp);
 	if (status & ADT7410_STAT_T_CRIT)
-		iio_push_event(indio_dev, 0,
+		iio_push_event(indio_dev,
 			       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
 						    IIO_EV_TYPE_THRESH,
 						    IIO_EV_DIR_RISING),
@@ -717,7 +717,6 @@ static struct attribute_group adt7410_event_attribute_group[ADT7410_IRQS] = {
 
 static const struct iio_info adt7410_info = {
 	.attrs = &adt7410_attribute_group,
-	.num_interrupt_lines = ADT7410_IRQS,
 	.event_attrs = adt7410_event_attribute_group,
 	.driver_module = THIS_MODULE,
 };
diff --git a/drivers/staging/iio/adc/adt75.c b/drivers/staging/iio/adc/adt75.c
index 66c50001d8c1..440c79946594 100644
--- a/drivers/staging/iio/adc/adt75.c
+++ b/drivers/staging/iio/adc/adt75.c
@@ -265,7 +265,7 @@ static const struct attribute_group adt75_attribute_group = {
 
 static irqreturn_t adt75_event_handler(int irq, void *private)
 {
-	iio_push_event(private, 0,
+	iio_push_event(private,
 		       IIO_EVENT_CODE_ADT75_OTI,
 		       iio_get_time_ns());
 
@@ -535,7 +535,6 @@ static struct attribute_group adt75_event_attribute_group = {
 
 static const struct iio_info adt75_info = {
 	.attrs = &adt75_attribute_group,
-	.num_interrupt_lines = 1,
 	.event_attrs = &adt75_event_attribute_group,
 	.driver_module = THIS_MODULE,
 };
diff --git a/drivers/staging/iio/adc/max1363_core.c b/drivers/staging/iio/adc/max1363_core.c
index 53b745143ae3..85fb74bf0ead 100644
--- a/drivers/staging/iio/adc/max1363_core.c
+++ b/drivers/staging/iio/adc/max1363_core.c
@@ -615,8 +615,7 @@ static irqreturn_t max1363_event_handler(int irq, void *private)
 	i2c_master_recv(st->client, &rx, 1);
 	mask = rx;
 	for_each_set_bit(loc, &mask, 8)
-		iio_push_event(indio_dev, 0, max1363_event_codes[loc],
-			       timestamp);
+		iio_push_event(indio_dev, max1363_event_codes[loc], timestamp);
 	i2c_master_send(st->client, tx, 2);
 
 	return IRQ_HANDLED;
@@ -845,7 +844,6 @@ static const struct iio_info max1363_info = {
 	.write_event_config = &max1363_write_event_config,
 	.read_raw = &max1363_read_raw,
 	.driver_module = THIS_MODULE,
-	.num_interrupt_lines = 1,
 	.event_attrs = &max1363_event_attribute_group,
 };
 
diff --git a/drivers/staging/iio/addac/adt7316.c b/drivers/staging/iio/addac/adt7316.c
index dca43a7af28d..0cb30915c003 100644
--- a/drivers/staging/iio/addac/adt7316.c
+++ b/drivers/staging/iio/addac/adt7316.c
@@ -1777,43 +1777,43 @@ static irqreturn_t adt7316_event_handler(int irq, void *private)
 
 		time = iio_get_time_ns();
 		if (stat1 & (1 << 0))
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_RISING),
 				       time);
 		if (stat1 & (1 << 1))
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 0,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_FALLING),
 				       time);
 		if (stat1 & (1 << 2))
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 1,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_RISING),
 				       time);
 		if (stat1 & (1 << 3))
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       IIO_UNMOD_EVENT_CODE(IIO_TEMP, 1,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_FALLING),
 				       time);
 		if (stat1 & (1 << 5))
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       IIO_UNMOD_EVENT_CODE(IIO_IN, 1,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_EITHER),
 				       time);
 		if (stat1 & (1 << 6))
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       IIO_UNMOD_EVENT_CODE(IIO_IN, 2,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_EITHER),
 				       time);
 		if (stat1 & (1 << 7))
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       IIO_UNMOD_EVENT_CODE(IIO_IN, 3,
 							    IIO_EV_TYPE_THRESH,
 							    IIO_EV_DIR_EITHER),
@@ -1822,7 +1822,7 @@ static irqreturn_t adt7316_event_handler(int irq, void *private)
 	ret = chip->bus.read(chip->bus.client, ADT7316_INT_STAT2, &stat2);
 	if (!ret) {
 		if (stat2 & ADT7316_INT_MASK2_VDD)
-			iio_push_event(indio_dev, 0,
+			iio_push_event(indio_dev,
 				       IIO_UNMOD_EVENT_CODE(IIO_IN,
 							    0,
 							    IIO_EV_TYPE_THRESH,
@@ -2110,14 +2110,12 @@ EXPORT_SYMBOL(adt7316_enable);
 
 static const struct iio_info adt7316_info = {
 	.attrs = &adt7316_attribute_group,
-	.num_interrupt_lines = 1,
 	.event_attrs = &adt7316_event_attribute_group,
 	.driver_module = THIS_MODULE,
 };
 
 static const struct iio_info adt7516_info = {
 	.attrs = &adt7516_attribute_group,
-	.num_interrupt_lines = 1,
 	.event_attrs = &adt7516_event_attribute_group,
 	.driver_module = THIS_MODULE,
 };
diff --git a/drivers/staging/iio/dac/ad5504.c b/drivers/staging/iio/dac/ad5504.c
index 5fb210652afa..9a421f2aceb4 100644
--- a/drivers/staging/iio/dac/ad5504.c
+++ b/drivers/staging/iio/dac/ad5504.c
@@ -252,7 +252,7 @@ static struct attribute_group ad5504_ev_attribute_group = {
 
 static irqreturn_t ad5504_event_handler(int irq, void *private)
 {
-	iio_push_event(private, 0,
+	iio_push_event(private,
 		       IIO_UNMOD_EVENT_CODE(IIO_TEMP,
 					    0,
 					    IIO_EV_TYPE_THRESH,
@@ -264,14 +264,12 @@ static irqreturn_t ad5504_event_handler(int irq, void *private)
 
 static const struct iio_info ad5504_info = {
 	.attrs = &ad5504_attribute_group,
-	.num_interrupt_lines = 1,
 	.event_attrs = &ad5504_ev_attribute_group,
 	.driver_module = THIS_MODULE,
 };
 
 static const struct iio_info ad5501_info = {
 	.attrs = &ad5501_attribute_group,
-	.num_interrupt_lines = 1,
 	.event_attrs = &ad5504_ev_attribute_group,
 	.driver_module = THIS_MODULE,
 };
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h
index 239219b9949d..098d827a7901 100644
--- a/drivers/staging/iio/iio.h
+++ b/drivers/staging/iio/iio.h
@@ -183,7 +183,6 @@ struct iio_dev;
  * struct iio_info - constant information about device
  * @driver_module:	module structure used to ensure correct
  *			ownership of chrdevs etc
- * @num_interrupt_lines:number of physical interrupt lines from device
  * @event_attrs:	event control attributes
  * @attrs:		general purpose device attributes
  * @read_raw:		function to request a value from the device.
@@ -207,7 +206,6 @@ struct iio_dev;
  **/
 struct iio_info {
 	struct module			*driver_module;
-	int				num_interrupt_lines;
 	struct attribute_group		*event_attrs;
 	const struct attribute_group	*attrs;
 
@@ -252,7 +250,7 @@ struct iio_info {
  * @currentmode:	[DRIVER] current operating mode
  * @dev:		[DRIVER] device structure, should be assigned a parent
  *			and owner
- * @event_interfaces:	[INTERN] event chrdevs associated with interrupt lines
+ * @event_interface:	[INTERN] event chrdevs associated with interrupt lines
  * @ring:		[DRIVER] any ring buffer present
  * @mlock:		[INTERN] lock used to prevent simultaneous device state
  *			changes
@@ -272,7 +270,7 @@ struct iio_dev {
 	int				currentmode;
 	struct device			dev;
 
-	struct iio_event_interface	*event_interfaces;
+	struct iio_event_interface	*event_interface;
 
 	struct iio_ring_buffer		*ring;
 	struct mutex			mlock;
@@ -309,10 +307,7 @@ void iio_device_unregister(struct iio_dev *dev_info);
  * @ev_code:		What event
  * @timestamp:		When the event occurred
  **/
-int iio_push_event(struct iio_dev *dev_info,
-		  int ev_line,
-		  int ev_code,
-		  s64 timestamp);
+int iio_push_event(struct iio_dev *dev_info, int ev_code,  s64 timestamp);
 
 extern struct bus_type iio_bus_type;
 
diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
index de918782d3bc..269a0f2bc3ee 100644
--- a/drivers/staging/iio/industrialio-core.c
+++ b/drivers/staging/iio/industrialio-core.c
@@ -146,13 +146,9 @@ struct iio_event_interface {
 	unsigned long flags;
 };
 
-int iio_push_event(struct iio_dev *dev_info,
-		   int ev_line,
-		   int ev_code,
-		   s64 timestamp)
+int iio_push_event(struct iio_dev *dev_info, int ev_code, s64 timestamp)
 {
-	struct iio_event_interface *ev_int
-		= &dev_info->event_interfaces[ev_line];
+	struct iio_event_interface *ev_int = dev_info->event_interface;
 	struct iio_detected_event_list *ev;
 	int ret = 0;
 
@@ -291,19 +287,19 @@ static void iio_device_free_chrdev_minor(int val)
 
 static int iio_event_getfd(struct iio_dev *indio_dev)
 {
-	if (indio_dev->event_interfaces == NULL)
+	if (indio_dev->event_interface == NULL)
 		return -ENODEV;
 
-	mutex_lock(&indio_dev->event_interfaces->event_list_lock);
+	mutex_lock(&indio_dev->event_interface->event_list_lock);
 	if (test_and_set_bit(IIO_BUSY_BIT_POS,
-			     &indio_dev->event_interfaces->flags)) {
-		mutex_unlock(&indio_dev->event_interfaces->event_list_lock);
+			     &indio_dev->event_interface->flags)) {
+		mutex_unlock(&indio_dev->event_interface->event_list_lock);
 		return -EBUSY;
 	}
-	mutex_unlock(&indio_dev->event_interfaces->event_list_lock);
+	mutex_unlock(&indio_dev->event_interface->event_list_lock);
 	return anon_inode_getfd("iio:event",
 				&iio_event_chrdev_fileops,
-				&indio_dev->event_interfaces[0], O_RDONLY);
+				indio_dev->event_interface, O_RDONLY);
 }
 
 static void iio_setup_ev_int(struct iio_event_interface *ev_int)
@@ -910,13 +906,9 @@ static int iio_device_add_event_sysfs(struct iio_dev *dev_info,
 					     &iio_ev_state_show,
 					     iio_ev_state_store,
 					     mask,
-					     /*HACK. - limits us to one
-					       event interface - fix by
-					       extending the bitmask - but
-					       how far*/
 					     0,
 					     &dev_info->dev,
-					     &dev_info->event_interfaces[0].
+					     &dev_info->event_interface->
 					     dev_attr_list);
 		kfree(postfix);
 		if (ret)
@@ -935,8 +927,8 @@ static int iio_device_add_event_sysfs(struct iio_dev *dev_info,
 					     mask,
 					     0,
 					     &dev_info->dev,
-					     &dev_info->event_interfaces[0]
-					     .dev_attr_list);
+					     &dev_info->event_interface->
+					     dev_attr_list);
 		kfree(postfix);
 		if (ret)
 			goto error_ret;
@@ -947,12 +939,11 @@ error_ret:
 	return ret;
 }
 
-static inline void __iio_remove_event_config_attrs(struct iio_dev *dev_info,
-						  int i)
+static inline void __iio_remove_event_config_attrs(struct iio_dev *dev_info)
 {
 	struct iio_dev_attr *p, *n;
 	list_for_each_entry_safe(p, n,
-				 &dev_info->event_interfaces[i].
+				 &dev_info->event_interface->
 				 dev_attr_list, l) {
 		sysfs_remove_file_from_group(&dev_info->dev.kobj,
 					     &p->dev_attr.attr,
@@ -962,25 +953,23 @@ static inline void __iio_remove_event_config_attrs(struct iio_dev *dev_info,
 	}
 }
 
-static inline int __iio_add_event_config_attrs(struct iio_dev *dev_info, int i)
+static inline int __iio_add_event_config_attrs(struct iio_dev *dev_info)
 {
 	int j;
 	int ret;
-	INIT_LIST_HEAD(&dev_info->event_interfaces[i].dev_attr_list);
+	INIT_LIST_HEAD(&dev_info->event_interface->dev_attr_list);
 	/* Dynically created from the channels array */
-	if (dev_info->channels) {
-		for (j = 0; j < dev_info->num_channels; j++) {
-			ret = iio_device_add_event_sysfs(dev_info,
-							 &dev_info
-							 ->channels[j]);
-			if (ret)
-				goto error_clear_attrs;
-		}
+	for (j = 0; j < dev_info->num_channels; j++) {
+
+		ret = iio_device_add_event_sysfs(dev_info,
+						 &dev_info->channels[j]);
+		if (ret)
+			goto error_clear_attrs;
 	}
 	return 0;
 
 error_clear_attrs:
-	__iio_remove_event_config_attrs(dev_info, i);
+	__iio_remove_event_config_attrs(dev_info);
 
 	return ret;
 }
@@ -994,42 +983,49 @@ static struct attribute_group iio_events_dummy_group = {
 	.attrs = iio_events_dummy_attrs
 };
 
+static bool iio_check_for_dynamic_events(struct iio_dev *dev_info)
+{
+	int j;
+	for (j = 0; j < dev_info->num_channels; j++)
+		if (dev_info->channels[j].event_mask != 0)
+			return true;
+	return false;
+}
+
 static int iio_device_register_eventset(struct iio_dev *dev_info)
 {
-	int ret = 0, i, j;
+	int ret = 0;
 
-	if (dev_info->info->num_interrupt_lines == 0)
+	if (!(dev_info->info->event_attrs ||
+	      iio_check_for_dynamic_events(dev_info)))
 		return 0;
 
-	dev_info->event_interfaces =
-		kzalloc(sizeof(struct iio_event_interface)
-			*dev_info->info->num_interrupt_lines,
-			GFP_KERNEL);
-	if (dev_info->event_interfaces == NULL) {
+	dev_info->event_interface =
+		kzalloc(sizeof(struct iio_event_interface), GFP_KERNEL);
+	if (dev_info->event_interface == NULL) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
 
-	for (i = 0; i < dev_info->info->num_interrupt_lines; i++) {
-		iio_setup_ev_int(&dev_info->event_interfaces[i]);
-		if (dev_info->info->event_attrs != NULL)
-			ret = sysfs_create_group(&dev_info->dev.kobj,
-						 &dev_info->info
-						 ->event_attrs[i]);
-		else
-			ret = sysfs_create_group(&dev_info->dev.kobj,
-						 &iio_events_dummy_group);
-		if (ret) {
-			dev_err(&dev_info->dev,
-				"Failed to register sysfs for event attrs");
-			goto error_free_setup_event_lines;
-		}
-		ret = __iio_add_event_config_attrs(dev_info, i);
+	iio_setup_ev_int(dev_info->event_interface);
+	if (dev_info->info->event_attrs != NULL)
+		ret = sysfs_create_group(&dev_info->dev.kobj,
+					 dev_info->info->event_attrs);
+	else
+		ret = sysfs_create_group(&dev_info->dev.kobj,
+					 &iio_events_dummy_group);
+	if (ret) {
+		dev_err(&dev_info->dev,
+			"Failed to register sysfs for event attrs");
+		goto error_free_setup_event_lines;
+	}
+	if (dev_info->channels) {
+		ret = __iio_add_event_config_attrs(dev_info);
 		if (ret) {
 			if (dev_info->info->event_attrs != NULL)
 				sysfs_remove_group(&dev_info->dev.kobj,
-						   &dev_info->info
-						   ->event_attrs[i]);
+						   dev_info->info
+						   ->event_attrs);
 			else
 				sysfs_remove_group(&dev_info->dev.kobj,
 						   &iio_events_dummy_group);
@@ -1040,16 +1036,14 @@ static int iio_device_register_eventset(struct iio_dev *dev_info)
 	return 0;
 
 error_free_setup_event_lines:
-	for (j = 0; j < i; j++) {
-		__iio_remove_event_config_attrs(dev_info, j);
-		if (dev_info->info->event_attrs != NULL) {
-			sysfs_remove_group(&dev_info->dev.kobj,
-					   &dev_info->info->event_attrs[j]);
-			sysfs_remove_group(&dev_info->dev.kobj,
-					   &iio_events_dummy_group);
-		}
-	}
-	kfree(dev_info->event_interfaces);
+	__iio_remove_event_config_attrs(dev_info);
+	if (dev_info->info->event_attrs != NULL)
+		sysfs_remove_group(&dev_info->dev.kobj,
+				   dev_info->info->event_attrs);
+	else
+		sysfs_remove_group(&dev_info->dev.kobj,
+				   &iio_events_dummy_group);
+	kfree(dev_info->event_interface);
 error_ret:
 
 	return ret;
@@ -1057,20 +1051,16 @@ error_ret:
 
 static void iio_device_unregister_eventset(struct iio_dev *dev_info)
 {
-	int i;
-
-	if (dev_info->info->num_interrupt_lines == 0)
+	if (dev_info->event_interface == NULL)
 		return;
-	for (i = 0; i < dev_info->info->num_interrupt_lines; i++) {
-		__iio_remove_event_config_attrs(dev_info, i);
-		if (dev_info->info->event_attrs != NULL)
-			sysfs_remove_group(&dev_info->dev.kobj,
-					   &dev_info->info->event_attrs[i]);
-		else
-			sysfs_remove_group(&dev_info->dev.kobj,
-					   &iio_events_dummy_group);
-	}
-	kfree(dev_info->event_interfaces);
+	__iio_remove_event_config_attrs(dev_info);
+	if (dev_info->info->event_attrs != NULL)
+		sysfs_remove_group(&dev_info->dev.kobj,
+				   dev_info->info->event_attrs);
+	else
+		sysfs_remove_group(&dev_info->dev.kobj,
+				   &iio_events_dummy_group);
+	kfree(dev_info->event_interface);
 }
 
 static void iio_dev_release(struct device *device)
diff --git a/drivers/staging/iio/light/tsl2563.c b/drivers/staging/iio/light/tsl2563.c
index 665a7441b2ee..60d21f3f0603 100644
--- a/drivers/staging/iio/light/tsl2563.c
+++ b/drivers/staging/iio/light/tsl2563.c
@@ -595,7 +595,7 @@ static irqreturn_t tsl2563_event_handler(int irq, void *private)
 	struct iio_dev *dev_info = private;
 	struct tsl2563_chip *chip = iio_priv(dev_info);
 
-	iio_push_event(dev_info, 0,
+	iio_push_event(dev_info,
 		       IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
 					    0,
 					    IIO_EV_TYPE_THRESH,
@@ -680,7 +680,6 @@ static const struct iio_info tsl2563_info_no_irq = {
 
 static const struct iio_info tsl2563_info = {
 	.driver_module = THIS_MODULE,
-	.num_interrupt_lines = 1,
 	.read_raw = &tsl2563_read_raw,
 	.write_raw = &tsl2563_write_raw,
 	.read_event_value = &tsl2563_read_thresh,