Add new filter types used in the ad7173 driver to the IIO ABI
documentation. These chips have a few filter types that haven't been
seen before in other drivers.

Signed-off-by: David Lechner <dlechner@baylibre.com>
---
 Documentation/ABI/testing/sysfs-bus-iio | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 3a13596b6eb081483a1f45fb0c446d2ab3b4c708..05ecf0b551698d3c7bf2d225507a1e0ecc253c86 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -2322,6 +2322,11 @@ Description:
 		  performance
 		* "sinc5+avg" - Sinc5 + averaging by 4.
 		* "sinc5+pf1" - Sinc5 + device specific Post Filter 1.
+		* "sinc5+sinc1" - Sinc5 + Sinc1.
+		* "sinc5+sinc1+pf1" - Sinc5 + Sinc1 + device specific Post Filter 1.
+		* "sinc5+sinc1+pf2" - Sinc5 + Sinc1 + device specific Post Filter 2.
+		* "sinc5+sinc1+pf3" - Sinc5 + Sinc1 + device specific Post Filter 3.
+		* "sinc5+sinc1+pf4" - Sinc5 + Sinc1 + device specific Post Filter 4.
 		* "wideband" - filter with wideband low ripple passband
 		  and sharp transition band.
 

-- 
2.43.0