dt-bindings: iio: adc: ad7768-1: add new supported parts and properties

Add compatibles for supported parts in the ad7768-1 family:
	ADAQ7767-1, ADAQ7768-1 and ADAQ7769-1

Add new properties:
	adi,low-latency and adi,gain-milli

Signed-off-by: jonathanns <[email protected]>

Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml

@@ -1,21 +1,31 @@
 # SPDX-License-Identifier: GPL-2.0
+# Copyright 2024 Analog Devices Inc.
 %YAML 1.2
 ---
 $id: http://devicetree.org/schemas/iio/adc/adi,ad7768-1.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: Analog Devices AD7768-1 ADC device driver
+title: Analog Devices AD7768-1 ADC family device driver
 
 maintainers:
   - Michael Hennerich <[email protected]>
+  - Jonathan Santos <[email protected]>
 
 description: |
-  Datasheet at:
-    https://www.analog.com/media/en/technical-documentation/data-sheets/ad7768-1.pdf
+  Analog Devices AD7768-1 24-Bit Single Channel Low Power sigma-delta ADC family
+
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ad7768-1.pdf
+  https://www.analog.com/media/en/technical-documentation/data-sheets/adaq7767-1.pdf
+  https://www.analog.com/media/en/technical-documentation/data-sheets/adaq7768-1.pdf
+  https://www.analog.com/media/en/technical-documentation/data-sheets/adaq7769-1.pdf
 
 properties:
   compatible:
-    const: adi,ad7768-1
+    enum:
+      - adi,ad7768-1
+      - adi,adaq7767-1
+      - adi,adaq7768-1
+      - adi,adaq7769-1
 
   reg:
     maxItems: 1
@@ -39,6 +49,27 @@ properties:
     description:
       ADC reference voltage supply
 
+  adi,low-latency:
+    description: |
+      Enables reaching the maximum data rate, using Sinc5 Dec8 filter.
+
+      0 - Maximum sample rate of 512 KSPS. The user can select different filters,
+          except for the Sinc5 Dec8. Samples have 24-bit precision.
+      1 - Sample rate is fixed at 1.024 MSPS. The filter is locked to Sinc5 Dec8,
+          and the user cannot choose another filter. Samples have 16-bit precision,
+          necessary for achieving the maximum sample rate.
+    enum: [0, 1]
+
+  adi,gain-milli:
+    description: |
+      Specifies the analog anti-aliasing filter (AAF) gain applied
+      to the ADC input, in milli-units. Required for ADAQ7767-1 and
+      ADAQ7769-1 devices, the gain is determined by the pin selection
+      (IN1, IN2, IN3) on the ADAQ7767-1 or the connections of OUT_PGA
+      with IN1_AAF, IN2_AAF, or IN3_AAF on the ADAQ7769-1.
+    $ref: /schemas/types.yaml#/definitions/uint16
+    enum: [143, 364, 1000]
+
   adi,sync-in-gpios:
     maxItems: 1
     description:
@@ -66,6 +97,7 @@ required:
   - spi-cpol
   - spi-cpha
   - adi,sync-in-gpios
+  - adi,low-latency
 
 patternProperties:
   "^channel@([0-9]|1[0-5])$":
@@ -105,6 +137,7 @@ examples:
             spi-max-frequency = <2000000>;
             spi-cpol;
             spi-cpha;
+            adi,low-latency = <0>
             vref-supply = <&adc_vref>;
             interrupts = <25 IRQ_TYPE_EDGE_RISING>;
             interrupt-parent = <&gpio>;