[PATCH v2 1/4] dt-bindings: iio: adc: ad7768-1: add new supported parts

[Jonathan Santos <Jonathan.Santos@analog.com>]

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

Add property and checks for AAF gain, supported by ADAQ7767-1
and ADAQ7769-1 parts:
	adi,gain-milli

Signed-off-by: Jonathan Santos <Jonathan.Santos@analog.com>
---
v2 Changes:
* adi,aaf-gain property renamed to adi,gain-milli. Description was 
  simplified.
* default value add to adi,gain-milli.
---
 .../bindings/iio/adc/adi,ad7768-1.yaml        | 43 +++++++++++++++++--
 1 file changed, 39 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml
index c06d0fc791d3..0c39491f6179 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml
@@ -4,18 +4,26 @@
 $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
 
 maintainers:
   - Michael Hennerich <michael.hennerich@analog.com>
 
 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
@@ -58,6 +66,18 @@ properties:
     description:
       ADC reference voltage supply
 
+  adi,gain-milli:
+    description: |
+       Specifies the gain applied by the Analog Anti-Aliasing Filter (AAF) to the
+       ADC input (in milli units). The hardware gain is determined by which input
+       pin(s) the signal goes through into the AAF. The possible connections are
+       * For the ADAQ7767-1: Input connected to IN1±, IN2± or IN3±.
+       * For the ADAQ7769-1: OUT_PGA pin connected to IN1_AAF+, IN2_AAF+,
+         or IN3_AAF+.
+    $ref: /schemas/types.yaml#/definitions/uint16
+    enum: [143, 364, 1000]
+    default: 1000
+
   adi,sync-in-gpios:
     maxItems: 1
     description:
@@ -147,6 +167,21 @@ patternProperties:
 allOf:
   - $ref: /schemas/spi/spi-peripheral-props.yaml#
 
+  # AAF Gain property only applies to ADAQ7767-1 and ADAQ7769-1 devices
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - adi,adaq7767-1
+              - adi,adaq7769-1
+    then:
+      required:
+        - adi,gain-milli
+    else:
+      properties:
+        adi,gain-milli: false
+
 unevaluatedProperties: false
 
 examples:
-- 
2.34.1