dt-bindings: iio: adc: Add adi,ad4052.yaml

Add documentation for devicetree bindings for AD4052 ADC family.

Signed-off-by: Jorge Marques <jorge.marques@analog.com>

Documentation/devicetree/bindings/iio/adc/adi,ad4052.yaml

@@ -0,0 +1,132 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2024 Analog Devices Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad4052.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD4052 ADC family device driver
+
+maintainers:
+  - Jorge Marques <jorge.marques@analog.com>
+
+description: |
+  Analog Devices AD4052 Single Channel Precision SAR ADC family
+
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ad4050.pdf
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ad4052.pdf
+
+properties:
+
+  compatible:
+    enum:
+      - adi,ad4050
+      - adi,ad4052
+      - adi,ad4056
+      - adi,ad4058
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    description:
+      Reference clock
+
+  clock-names:
+    const: ref_clk
+
+  interrupts:
+    description: IRQ line for the ADC GP0
+    maxItems: 1
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    const: rx
+
+  pwms:
+    maxItems: 1
+
+  pwm-names:
+    oneOf:
+      - items:
+          - const: cnv
+
+  cnv-gpios:
+    description: GPIO line for the ADC CNV
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 25000000
+
+  vdd-supply: true
+  vdd_1_8-supply: true
+  vio-supply: true
+
+  adi,functional-mode:
+    description:
+      The device supports functional modes, granuality depends on the device.
+
+      0 - Sample is 12 or 16 bit.
+      1 - Sample is 24 or 16-bit burst average of n-samples.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    default: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - dmas
+  - dma-names
+  - pwms
+  - pwm-names
+  - interrupts
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - adi,ad4050
+              - adi,ad4052
+              - adi,ad4056
+              - adi,ad4058
+    then:
+      properties:
+        adi,functional-mode:
+          enum: [0, 1]
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@0 {
+            compatible = "adi,ad4052";
+            reg = <0>;
+            spi-max-frequency = <25000000>;
+
+            clocks = <&clk0>;
+            clock-names = "ref_clk";
+            dmas = <&dma 0>;
+            dma-names = "rx";
+            pwm-names = "cnv";
+            pwms = <&adc_trigger 0 0>;
+            cnv-gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
+            interrupts = <0 2>;
+            interrupt-parent = <&gpio>;
+
+            adi,functional-mode = <0>;
+        };
+    };
+...