[PATCH v3 1/2] dt-bindings: iio: adf4371: add rdiv2 and doubler

[Antoniu Miclaus <antoniu.miclaus@analog.com>]

Add support for reference doubler enable and reference divide by 2
clock.

Both of these blocks are optional on the frequency path within the
chip and can be adjusted depending on the custom needs of the
applications.

The doubler is useful for increasing the PFD comparison frequency
which will result in a noise performance of the system.

The reference divide by 2 divides the reference signal by 2,
resulting in a 50% duty cycle PFD frequency.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
---
changes in v3:
 - add explanation in commit body
 .../devicetree/bindings/iio/frequency/adf4371.yaml    | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/frequency/adf4371.yaml b/Documentation/devicetree/bindings/iio/frequency/adf4371.yaml
index 1cb2adaf66f9..ef241c38520c 100644
--- a/Documentation/devicetree/bindings/iio/frequency/adf4371.yaml
+++ b/Documentation/devicetree/bindings/iio/frequency/adf4371.yaml
@@ -40,6 +40,17 @@ properties:
       output stage will shut down until the ADF4371/ADF4372 achieves lock as
       measured by the digital lock detect circuitry.
 
+  adi,reference-doubler-enable:
+    type: boolean
+    description:
+      If this property is present, the reference doubler block is enabled.
+
+  adi,adi,reference-div2-enable:
+    type: boolean
+    description:
+      If this property is present, the reference divide by 2 clock is enabled.
+      This feature can be used to provide a 50% duty cycle signal to the PFD.
+
 required:
   - compatible
   - reg
-- 
2.47.1