staging:iio:trigger handle name attr in core, remove old alloc and re…

…gister any control_attrs via struct device

As the majority of triggers don't actually have any other control_attrs lets use the fact
that struct device has a groups element when we do need to have these attributes registered.
A vargs function is used to cut down on lots of building strings in every single driver
just in order to pass them into the allocate.

Also iio_allocate_trigger_named -> iio_allocate_trigger as there is no
unamed version any more, so that is now just confusing.

Blackfin tested and fixed by Michael Hennerich.

V2: Elements from Michael Hennerich's patches for the ade7758

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/accel/adis16201_trigger.c

@@ -11,17 +11,6 @@
 #include "../trigger.h"
 #include "adis16201.h"
 
-static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
-
-static struct attribute *adis16201_trigger_attrs[] = {
-	&dev_attr_name.attr,
-	NULL,
-};
-
-static const struct attribute_group adis16201_trigger_attr_group = {
-	.attrs = adis16201_trigger_attrs,
-};
-
 /**
  * adis16201_data_rdy_trigger_set_state() set datardy interrupt state
  **/
@@ -39,19 +28,11 @@ int adis16201_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
 	struct adis16201_state *st = indio_dev->dev_data;
-	char *name;
 
-	name = kasprintf(GFP_KERNEL,
-			 "adis16201-dev%d",
-			 indio_dev->id);
-	if (name == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	st->trig = iio_allocate_trigger_named(name);
+	st->trig = iio_allocate_trigger("adis16201-dev%d", indio_dev->id);
 	if (st->trig == NULL) {
 		ret = -ENOMEM;
-		goto error_free_name;
+		goto error_ret;
 	}
 	ret = request_irq(st->us->irq,
 			  &iio_trigger_generic_data_rdy_poll,
@@ -64,7 +45,6 @@ int adis16201_probe_trigger(struct iio_dev *indio_dev)
 	st->trig->owner = THIS_MODULE;
 	st->trig->private_data = st;
 	st->trig->set_trigger_state = &adis16201_data_rdy_trigger_set_state;
-	st->trig->control_attrs = &adis16201_trigger_attr_group;
 	ret = iio_trigger_register(st->trig);
 
 	/* select default trigger */
@@ -78,8 +58,6 @@ int adis16201_probe_trigger(struct iio_dev *indio_dev)
 	free_irq(st->us->irq, st->trig);
 error_free_trig:
 	iio_free_trigger(st->trig);
-error_free_name:
-	kfree(name);
 error_ret:
 	return ret;
 }
@@ -89,7 +67,6 @@ void adis16201_remove_trigger(struct iio_dev *indio_dev)
 	struct adis16201_state *state = indio_dev->dev_data;
 
 	iio_trigger_unregister(state->trig);
-	kfree(state->trig->name);
 	free_irq(state->us->irq, state->trig);
 	iio_free_trigger(state->trig);
 }

drivers/staging/iio/accel/adis16203_trigger.c

@@ -12,17 +12,6 @@
 #include "../trigger.h"
 #include "adis16203.h"
 
-static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
-
-static struct attribute *adis16203_trigger_attrs[] = {
-	&dev_attr_name.attr,
-	NULL,
-};
-
-static const struct attribute_group adis16203_trigger_attr_group = {
-	.attrs = adis16203_trigger_attrs,
-};
-
 /**
  * adis16203_data_rdy_trigger_set_state() set datardy interrupt state
  **/
@@ -40,20 +29,11 @@ int adis16203_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
 	struct adis16203_state *st = indio_dev->dev_data;
-	char *name;
-
-	name = kasprintf(GFP_KERNEL,
-			 "adis16203-dev%d",
-			 indio_dev->id);
-	if (name == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
 
-	st->trig = iio_allocate_trigger_named(name);
+	st->trig = iio_allocate_trigger("adis16203-dev%d", indio_dev->id);
 	if (st->trig == NULL) {
 		ret = -ENOMEM;
-		goto error_free_name;
+		goto error_ret;
 	}
 
 	ret = request_irq(st->us->irq,
@@ -68,7 +48,6 @@ int adis16203_probe_trigger(struct iio_dev *indio_dev)
 	st->trig->owner = THIS_MODULE;
 	st->trig->private_data = st;
 	st->trig->set_trigger_state = &adis16203_data_rdy_trigger_set_state;
-	st->trig->control_attrs = &adis16203_trigger_attr_group;
 	ret = iio_trigger_register(st->trig);
 
 	/* select default trigger */
@@ -82,8 +61,6 @@ int adis16203_probe_trigger(struct iio_dev *indio_dev)
 	free_irq(st->us->irq, st->trig);
 error_free_trig:
 	iio_free_trigger(st->trig);
-error_free_name:
-	kfree(name);
 error_ret:
 	return ret;
 }
@@ -93,7 +70,6 @@ void adis16203_remove_trigger(struct iio_dev *indio_dev)
 	struct adis16203_state *state = indio_dev->dev_data;
 
 	iio_trigger_unregister(state->trig);
-	kfree(state->trig->name);
 	free_irq(state->us->irq, state->trig);
 	iio_free_trigger(state->trig);
 }

drivers/staging/iio/accel/adis16204_trigger.c

@@ -12,17 +12,6 @@
 #include "../trigger.h"
 #include "adis16204.h"
 
-static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
-
-static struct attribute *adis16204_trigger_attrs[] = {
-	&dev_attr_name.attr,
-	NULL,
-};
-
-static const struct attribute_group adis16204_trigger_attr_group = {
-	.attrs = adis16204_trigger_attrs,
-};
-
 /**
  * adis16204_data_rdy_trigger_set_state() set datardy interrupt state
  **/
@@ -40,20 +29,11 @@ int adis16204_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
 	struct adis16204_state *st = indio_dev->dev_data;
-	char *name;
-
-	name = kasprintf(GFP_KERNEL,
-			 "adis16204-dev%d",
-			 indio_dev->id);
-	if (name == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
 
-	st->trig = iio_allocate_trigger_named(name);
+	st->trig = iio_allocate_trigger("adis16204-dev%d", indio_dev->id);
 	if (st->trig == NULL) {
 		ret = -ENOMEM;
-		goto error_free_name;
+		goto error_ret;
 	}
 
 	ret = request_irq(st->us->irq,
@@ -68,7 +48,6 @@ int adis16204_probe_trigger(struct iio_dev *indio_dev)
 	st->trig->owner = THIS_MODULE;
 	st->trig->private_data = st;
 	st->trig->set_trigger_state = &adis16204_data_rdy_trigger_set_state;
-	st->trig->control_attrs = &adis16204_trigger_attr_group;
 	ret = iio_trigger_register(st->trig);
 
 	/* select default trigger */
@@ -82,8 +61,6 @@ int adis16204_probe_trigger(struct iio_dev *indio_dev)
 	free_irq(st->us->irq, st->trig);
 error_free_trig:
 	iio_free_trigger(st->trig);
-error_free_name:
-	kfree(name);
 error_ret:
 	return ret;
 }
@@ -93,7 +70,6 @@ void adis16204_remove_trigger(struct iio_dev *indio_dev)
 	struct adis16204_state *state = indio_dev->dev_data;
 
 	iio_trigger_unregister(state->trig);
-	kfree(state->trig->name);
 	free_irq(state->us->irq, state->trig);
 	iio_free_trigger(state->trig);
 }

drivers/staging/iio/accel/adis16209_trigger.c

@@ -21,17 +21,6 @@ static irqreturn_t adis16209_data_rdy_trig_poll(int irq, void *trig)
 	return IRQ_HANDLED;
 }
 
-static IIO_TRIGGER_NAME_ATTR;
-
-static struct attribute *adis16209_trigger_attrs[] = {
-	&dev_attr_name.attr,
-	NULL,
-};
-
-static const struct attribute_group adis16209_trigger_attr_group = {
-	.attrs = adis16209_trigger_attrs,
-};
-
 /**
  * adis16209_data_rdy_trigger_set_state() set datardy interrupt state
  **/
@@ -49,20 +38,11 @@ int adis16209_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
 	struct adis16209_state *st = indio_dev->dev_data;
-	char *name;
-
-	name = kasprintf(GFP_KERNEL,
-			 "adis16209-dev%d",
-			 indio_dev->id);
-	if (name == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
 
-	st->trig = iio_allocate_trigger_named(name);
+	st->trig = iio_allocate_trigger("adis16209-dev%d", indio_dev->id);
 	if (st->trig == NULL) {
 		ret = -ENOMEM;
-		goto error_free_name;
+		goto error_ret;
 	}
 
 	ret = request_irq(st->us->irq,
@@ -76,7 +56,6 @@ int adis16209_probe_trigger(struct iio_dev *indio_dev)
 	st->trig->owner = THIS_MODULE;
 	st->trig->private_data = st;
 	st->trig->set_trigger_state = &adis16209_data_rdy_trigger_set_state;
-	st->trig->control_attrs = &adis16209_trigger_attr_group;
 	ret = iio_trigger_register(st->trig);
 
 	/* select default trigger */
@@ -90,8 +69,6 @@ int adis16209_probe_trigger(struct iio_dev *indio_dev)
 	free_irq(st->us->irq, st->trig);
 error_free_trig:
 	iio_free_trigger(st->trig);
-error_free_name:
-	kfree(name);
 error_ret:
 	return ret;
 }
@@ -101,7 +78,6 @@ void adis16209_remove_trigger(struct iio_dev *indio_dev)
 	struct adis16209_state *state = indio_dev->dev_data;
 
 	iio_trigger_unregister(state->trig);
-	kfree(state->trig->name);
 	free_irq(state->us->irq, state->trig);
 	iio_free_trigger(state->trig);
 }

drivers/staging/iio/accel/adis16240_trigger.c

@@ -21,17 +21,6 @@ static irqreturn_t adis16240_data_rdy_trig_poll(int irq, void *trig)
 	return IRQ_HANDLED;
 }
 
-static IIO_TRIGGER_NAME_ATTR;
-
-static struct attribute *adis16240_trigger_attrs[] = {
-	&dev_attr_name.attr,
-	NULL,
-};
-
-static const struct attribute_group adis16240_trigger_attr_group = {
-	.attrs = adis16240_trigger_attrs,
-};
-
 /**
  * adis16240_data_rdy_trigger_set_state() set datardy interrupt state
  **/
@@ -49,17 +38,11 @@ int adis16240_probe_trigger(struct iio_dev *indio_dev)
 {
 	int ret;
 	struct adis16240_state *st = indio_dev->dev_data;
-	char *name;
 
-	name = kasprintf(GFP_KERNEL, "adis16240-dev%d", indio_dev->id);
-	if (name == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	st->trig = iio_allocate_trigger_named(name);
+	st->trig = iio_allocate_trigger("adis16240-dev%d", indio_dev->id);
 	if (st->trig == NULL) {
 		ret = -ENOMEM;
-		goto error_free_name;
+		goto error_ret;
 	}
 
 	ret = request_irq(st->us->irq,
@@ -74,7 +57,6 @@ int adis16240_probe_trigger(struct iio_dev *indio_dev)
 	st->trig->owner = THIS_MODULE;
 	st->trig->private_data = st;
 	st->trig->set_trigger_state = &adis16240_data_rdy_trigger_set_state;
-	st->trig->control_attrs = &adis16240_trigger_attr_group;
 	ret = iio_trigger_register(st->trig);
 
 	/* select default trigger */
@@ -88,8 +70,6 @@ int adis16240_probe_trigger(struct iio_dev *indio_dev)
 	free_irq(st->us->irq, st->trig);
 error_free_trig:
 	iio_free_trigger(st->trig);
-error_free_name:
-	kfree(name);
 error_ret:
 	return ret;
 }
@@ -99,7 +79,6 @@ void adis16240_remove_trigger(struct iio_dev *indio_dev)
 	struct adis16240_state *state = indio_dev->dev_data;
 
 	iio_trigger_unregister(state->trig);
-	kfree(state->trig->name);
 	free_irq(state->us->irq, state->trig);
 	iio_free_trigger(state->trig);
 }

drivers/staging/iio/accel/lis3l02dq_ring.c

@@ -260,17 +260,6 @@ static int lis3l02dq_data_rdy_trigger_set_state(struct iio_trigger *trig,
 	return ret;
 }
 
-static IIO_TRIGGER_NAME_ATTR;
-
-static struct attribute *lis3l02dq_trigger_attrs[] = {
-	&dev_attr_name.attr,
-	NULL,
-};
-
-static const struct attribute_group lis3l02dq_trigger_attr_group = {
-	.attrs = lis3l02dq_trigger_attrs,
-};
-
 /**
  * lis3l02dq_trig_try_reen() try renabling irq for data rdy trigger
  * @trig:	the datardy trigger
@@ -301,27 +290,18 @@ int lis3l02dq_probe_trigger(struct iio_dev *indio_dev)
 	struct iio_sw_ring_helper_state *h
 		= iio_dev_get_devdata(indio_dev);
 	struct lis3l02dq_state *st = lis3l02dq_h_to_s(h);
-	char *name;
 
-	name = kasprintf(GFP_KERNEL,
-			 "lis3l02dq-dev%d",
-			 indio_dev->id);
-	if (name == NULL) {
-		ret = -ENOMEM;
-		goto error_ret;
-	}
-	st->trig = iio_allocate_trigger_named(name);
+	st->trig = iio_allocate_trigger("lis3l02dq-dev%d", indio_dev->id);
 	if (!st->trig) {
 		ret = -ENOMEM;
-		goto error_free_name;
+		goto error_ret;
 	}
 
 	st->trig->dev.parent = &st->us->dev;
 	st->trig->owner = THIS_MODULE;
 	st->trig->private_data = st;
 	st->trig->set_trigger_state = &lis3l02dq_data_rdy_trigger_set_state;
 	st->trig->try_reenable = &lis3l02dq_trig_try_reen;
-	st->trig->control_attrs = &lis3l02dq_trigger_attr_group;
 	ret = iio_trigger_register(st->trig);
 	if (ret)
 		goto error_free_trig;
@@ -330,8 +310,6 @@ int lis3l02dq_probe_trigger(struct iio_dev *indio_dev)
 
 error_free_trig:
 	iio_free_trigger(st->trig);
-error_free_name:
-	kfree(name);
 error_ret:
 	return ret;
 }
@@ -343,7 +321,6 @@ void lis3l02dq_remove_trigger(struct iio_dev *indio_dev)
 	struct lis3l02dq_state *st = lis3l02dq_h_to_s(h);
 
 	iio_trigger_unregister(st->trig);
-	kfree(st->trig->name);
 	iio_free_trigger(st->trig);
 }