[PATCH v4 3/3] iio: adc: ad4130: Add filter_type attributes

[Marcelo Schmitt]

Make filter control also available through filter_type attributes which are
now standardized in main IIO ABI documentation.

Suggested-by: David Lechner <dlechner@xxxxxxxxxxxx>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
Reviewed-by: David Lechner <dlechner@xxxxxxxxxxxx>
---
 drivers/iio/adc/ad4130.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/iio/adc/ad4130.c b/drivers/iio/adc/ad4130.c
index de32cc9d18c5..acc241cc0a7a 100644
--- a/drivers/iio/adc/ad4130.c
+++ b/drivers/iio/adc/ad4130.c
@@ -939,9 +939,16 @@ static const struct iio_enum ad4130_filter_mode_enum = {
 };
 
 static const struct iio_chan_spec_ext_info ad4130_filter_mode_ext_info[] = {
+	/*
+	 * Intentional duplication of attributes to keep backwards compatibility
+	 * while standardizing over the main IIO ABI for digital filtering.
+	 */
 	IIO_ENUM("filter_mode", IIO_SEPARATE, &ad4130_filter_mode_enum),
 	IIO_ENUM_AVAILABLE("filter_mode", IIO_SHARED_BY_TYPE,
 			   &ad4130_filter_mode_enum),
+	IIO_ENUM("filter_type", IIO_SEPARATE, &ad4130_filter_mode_enum),
+	IIO_ENUM_AVAILABLE("filter_type", IIO_SHARED_BY_TYPE,
+			   &ad4130_filter_mode_enum),
 	{ }
 };
 
-- 
2.47.2