1 files changed, 55 insertions, 0 deletions

diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index 19f7a91157ee..910c1f14abd5 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -355,6 +355,21 @@ static ssize_t iio_ev_value_store(struct device *dev,
 	return len;
 }
 
+static ssize_t iio_ev_label_show(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+
+	if (indio_dev->info->read_event_label)
+		return indio_dev->info->read_event_label(indio_dev,
+				 this_attr->c, iio_ev_attr_type(this_attr),
+				 iio_ev_attr_dir(this_attr), buf);
+
+	return -EINVAL;
+}
+
 static int iio_device_add_event(struct iio_dev *indio_dev,
 	const struct iio_chan_spec *chan, unsigned int spec_index,
 	enum iio_event_type type, enum iio_event_direction dir,
@@ -411,6 +426,41 @@ static int iio_device_add_event(struct iio_dev *indio_dev,
 	return attrcount;
 }
 
+static int iio_device_add_event_label(struct iio_dev *indio_dev,
+				      const struct iio_chan_spec *chan,
+				      unsigned int spec_index,
+				      enum iio_event_type type,
+				      enum iio_event_direction dir)
+{
+	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
+	char *postfix;
+	int ret;
+
+	if (!indio_dev->info->read_event_label)
+		return 0;
+
+	if (dir != IIO_EV_DIR_NONE)
+		postfix = kasprintf(GFP_KERNEL, "%s_%s_label",
+				iio_ev_type_text[type],
+				iio_ev_dir_text[dir]);
+	else
+		postfix = kasprintf(GFP_KERNEL, "%s_label",
+				iio_ev_type_text[type]);
+	if (postfix == NULL)
+		return -ENOMEM;
+
+	ret = __iio_add_chan_devattr(postfix, chan, &iio_ev_label_show, NULL,
+				spec_index, IIO_SEPARATE, &indio_dev->dev, NULL,
+				&iio_dev_opaque->event_interface->dev_attr_list);
+
+	kfree(postfix);
+
+	if (ret < 0)
+		return ret;
+
+	return 1;
+}
+
 static int iio_device_add_event_sysfs(struct iio_dev *indio_dev,
 	struct iio_chan_spec const *chan)
 {
@@ -448,6 +498,11 @@ static int iio_device_add_event_sysfs(struct iio_dev *indio_dev,
 		if (ret < 0)
 			return ret;
 		attrcount += ret;
+
+		ret = iio_device_add_event_label(indio_dev, chan, i, type, dir);
+		if (ret < 0)
+			return ret;
+		attrcount += ret;
 	}
 	ret = attrcount;
 	return ret;