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Diffstat (limited to 'drivers/iio/industrialio-event.c')
-rw-r--r--drivers/iio/industrialio-event.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index 19f7a91157..910c1f14ab 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;