dt-bindings: iio: frequency: add admv1014 binding

Add device tree bindings for the ADMV1014 Upconverter.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220215081216.67706-2-antoniu.miclaus@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/frequency/adi,admv1014.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/frequency/adi,admv1014.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ADMV1014 Microwave Downconverter
+
+maintainers:
+  - Antoniu Miclaus <antoniu.miclaus@analog.com>
+
+description: |
+   Wideband, microwave downconverter optimized for point to point microwave
+   radio designs operating in the 24 GHz to 44 GHz frequency range.
+
+   https://www.analog.com/en/products/admv1014.html
+
+properties:
+  compatible:
+    enum:
+      - adi,admv1014
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 1000000
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: lo_in
+    description:
+      External clock that provides the Local Oscilator input.
+
+  vcm-supply:
+    description:
+      Common-mode voltage regulator.
+
+  vcc-if-bb-supply:
+    description:
+      BB and IF supply voltage regulator.
+
+  vcc-vga-supply:
+    description:
+      RF Amplifier supply voltage regulator.
+
+  vcc-vva-supply:
+    description:
+      VVA Control Circuit supply voltage regulator.
+
+  vcc-lna-3p3-supply:
+    description:
+      Low Noise Amplifier 3.3V supply voltage regulator.
+
+  vcc-lna-1p5-supply:
+    description:
+      Low Noise Amplifier 1.5V supply voltage regulator.
+
+  vcc-bg-supply:
+    description:
+      Band Gap Circuit supply voltage regulator.
+
+  vcc-quad-supply:
+    description:
+      Quadruple supply voltage regulator.
+
+  vcc-mixer-supply:
+    description:
+      Mixer supply voltage regulator.
+
+  adi,input-mode:
+    description:
+      Select the input mode.
+      iq - in-phase quadrature (I/Q) input
+      if - complex intermediate frequency (IF) input
+    enum: [iq, if]
+
+  adi,detector-enable:
+    description:
+      Digital Rx Detector Enable. The Square Law Detector output is
+      available at output pin VDET.
+    type: boolean
+
+  adi,p1db-compensation-enable:
+    description:
+      Turn on bits to optimize P1dB.
+    type: boolean
+
+  adi,quad-se-mode:
+    description:
+      Switch the LO path from differential to single-ended operation.
+      se-neg - Single-Ended Mode, Negative Side Disabled.
+      se-pos - Single-Ended Mode, Positive Side Disabled.
+      diff - Differential Mode.
+    enum: [se-neg, se-pos, diff]
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - vcm-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      converter@0 {
+        compatible = "adi,admv1014";
+        reg = <0>;
+        spi-max-frequency = <1000000>;
+        clocks = <&admv1014_lo>;
+        clock-names = "lo_in";
+        vcm-supply = <&vcm>;
+        vcc-if-bb-supply = <&vcc_if_bb>;
+        vcc-vga-supply = <&vcc_vga>;
+        vcc-vva-supply = <&vcc_vva>;
+        vcc-lna-3p3-supply = <&vcc_lna_3p3>;
+        vcc-lna-1p5-supply = <&vcc_lna_1p5>;
+        vcc-bg-supply = <&vcc_bg>;
+        vcc-quad-supply = <&vcc_quad>;
+        vcc-mixer-supply = <&vcc_mixer>;
+        adi,quad-se-mode = "diff";
+        adi,detector-enable;
+        adi,p1db-compensation-enable;
+      };
+    };
+...