[PATCH v1 1/2] dt:bindings:iio:frequency: Add ADMV4420 doc

[Cristian Pop <cristian.pop@analog.com>]

Add device tree bindings for the ADMV4420 K band downconverter.

Signed-off-by: Cristian Pop <cristian.pop@analog.com>
---
 .../bindings/iio/frequency/adi,admv4420.yaml  | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/frequency/adi,admv4420.yaml

diff --git a/Documentation/devicetree/bindings/iio/frequency/adi,admv4420.yaml b/Documentation/devicetree/bindings/iio/frequency/adi,admv4420.yaml
new file mode 100644
index 000000000000..f26af2718f23
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/frequency/adi,admv4420.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/frequency/adi,admv4420.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ADMV4420 K Band Downconverter
+
+maintainers:
+- Cristian Pop <cristian.pop@analog.com>
+
+description: |
+    The ADMV4420 is a highly integrated, double balanced, active
+    mixer with an integrated fractional-N synthesizer, ideally suited
+    for next generation K band satellite communications
+properties:
+  compatible:
+    enum:
+      - adi,admv4420
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 1000000
+
+  adi,lo_freq_hz:
+    description: LO Frequency
+    $ref: /schemas/types.yaml#/definitions/uint64
+
+  adi,ref_ext_single_ended_en:
+    description: External reference selected.
+    type: boolean
+
+required:
+- compatible
+- reg
+
+additionalProperties: false
+
+examples:
+- |
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      admv4420@0 {
+        compatible = "adi,admv4420";
+        reg = <0>;
+        spi-max-frequency = <1000000>;
+        adi,lo_freq_hz = /bits/ 64 <16743700000>;
+        adi,ref_ext_single_ended_en;
+      };
+    };
+...
-- 
2.17.1