iio: core: Introduce IIO_EV_DIR_NONE

For some events (e.g.: step detector) a direction does not make sense.

Add IIO_EV_DIR_NONE to be used with such events and generate sysfs event
attributes that do not contain direction.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index b3a241d53b54..52cb5329407b 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -86,6 +86,7 @@ enum iio_event_direction {
         IIO_EV_DIR_EITHER,
         IIO_EV_DIR_RISING,
         IIO_EV_DIR_FALLING,
+        IIO_EV_DIR_NONE,
 };
 
 #define IIO_VAL_INT 1