[PATCH] dt-bindings: iio: dds: Add AD9832/AD9835 binding

[Hungyu Lin <dennylin0707@gmail.com>]

Add devicetree binding documentation for AD9832 and AD9835 DDS devices.

These devices are SPI-controlled direct digital synthesizers
requiring AVDD, DVDD supplies and an external master clock.

Signed-off-by: Hungyu Lin <dennylin0707@gmail.com>
---
 .../bindings/iio/dds/adi,ad9832.yaml          | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/dds/adi,ad9832.yaml

diff --git a/Documentation/devicetree/bindings/iio/dds/adi,ad9832.yaml b/Documentation/devicetree/bindings/iio/dds/adi,ad9832.yaml
new file mode 100644
index 000000000000..7e2eece086d0
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dds/adi,ad9832.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dds/adi,ad9832.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD9832 / AD9835 DDS
+
+maintainers:
+  - Hungyu Lin <dennylin0707@gmail.com>
+
+description: |
+  Analog Devices AD9832 and AD9835 are SPI-controlled direct digital
+  synthesizers (DDS) capable of generating programmable frequency and
+  phase output signals using an external master clock.
+
+properties:
+  compatible:
+    enum:
+      - adi,ad9832
+      - adi,ad9835
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 20000000
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: mclk
+
+  avdd-supply:
+    description: Analog power supply
+
+  dvdd-supply:
+    description: Digital power supply
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - avdd-supply
+  - dvdd-supply
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ad9832@0 {
+            compatible = "adi,ad9832";
+            reg = <0>;
+            spi-max-frequency = <20000000>;
+            clocks = <&mclk>;
+            clock-names = "mclk";
+            avdd-supply = <&vdd_3v3>;
+            dvdd-supply = <&vdd_3v3>;
+        };
+    };
-- 
2.34.1