ADAQ4216 and ADAQ4224 are similar to AD4030 except that ADAQ devices have a
PGA (programmable gain amplifier) that scales the input signal prior to it
reaching the ADC inputs. The PGA is controlled through a couple of pins (A0
and A1) that set one of four possible signal gain configurations.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
---
Change log v6 -> v7
- No changes.

 .../bindings/iio/adc/adi,ad4030.yaml          | 70 +++++++++++++++++--
 1 file changed, 65 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
index 564b6f67a96e..3890cd4ba93e 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4030.yaml

@@ -19,6 +19,8 @@ description: |
   * https://www.analog.com/media/en/technical-documentation/data-sheets/ad4030-24-4032-24.pdf
   * https://www.analog.com/media/en/technical-documentation/data-sheets/ad4630-24_ad4632-24.pdf
   * https://www.analog.com/media/en/technical-documentation/data-sheets/ad4630-16-4632-16.pdf
+  * https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4216.pdf
+  * https://www.analog.com/media/en/technical-documentation/data-sheets/adaq4224.pdf
 
 $ref: /schemas/spi/spi-peripheral-props.yaml#
 

@@ -31,6 +33,8 @@ properties:
       - adi,ad4630-24
       - adi,ad4632-16
       - adi,ad4632-24
+      - adi,adaq4216
+      - adi,adaq4224
 
   reg:
     maxItems: 1

@@ -54,6 +58,14 @@ properties:
     description:
       Internal buffered Reference. Used when ref-supply is not connected.
 
+  vddh-supply:
+    description:
+      PGIA Positive Power Supply.
+
+  vdd-fda-supply:
+    description:
+      FDA Positive Power Supply.
+
   cnv-gpios:
     description:
       The Convert Input (CNV). It initiates the sampling conversions.

@@ -64,6 +76,13 @@ properties:
       The Reset Input (/RST). Used for asynchronous device reset.
     maxItems: 1
 
+  pga-gpios:
+    description:
+      A0 and A1 pins for gain selection. For devices that have PGA configuration
+      input pins, pga-gpios should be defined.
+    minItems: 2
+    maxItems: 2
+
   pwms:
     description: PWM signal connected to the CNV pin.
     maxItems: 1

@@ -86,11 +105,29 @@ required:
   - vio-supply
   - cnv-gpios
 
-oneOf:
-  - required:
-      - ref-supply
-  - required:
-      - refin-supply
+allOf:
+  - oneOf:
+      - required:
+          - ref-supply
+      - required:
+          - refin-supply

+  # ADAQ devices require a gain property to indicate how hardware PGA is set
+  - if:
+      properties:
+        compatible:
+          contains:
+            pattern: ^adi,adaq
+    then:
+      required:
+        - vddh-supply
+        - vdd-fda-supply
+        - pga-gpios
+      properties:
+        ref-supply: false
+    else:
+      properties:
+        pga-gpios: false
+
 
 unevaluatedProperties: false
 

@@ -114,3 +151,26 @@ examples:
             reset-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
         };
     };
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@0 {
+            compatible = "adi,adaq4216";
+            reg = <0>;
+            spi-max-frequency = <80000000>;
+            vdd-5v-supply = <&supply_5V>;
+            vdd-1v8-supply = <&supply_1_8V>;
+            vio-supply = <&supply_1_8V>;
+            refin-supply = <&refin_sup>;
+            vddh-supply = <&vddh>;
+            vdd-fda-supply = <&vdd_fda>;
+            cnv-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
+            reset-gpios = <&gpio0 1 GPIO_ACTIVE_LOW>;
+            pga-gpios = <&gpio0 2 GPIO_ACTIVE_HIGH>,
+                        <&gpio0 3 GPIO_ACTIVE_HIGH>;
+        };
+    };
+...

-- 
2.39.2