[PATCH] dt-bindings: iio: adc: Add AD7816 binding

[Omer PALA <palaomer100@gmail.com>]

Add a DeviceTree binding schema for the Analog Devices AD7816
digital temperature sensor. The same schema also covers the
compatible AD7817 and AD7818 variants.

The driver currently lives under drivers/staging/iio/adc/ad7816.c.

Signed-off-by: Omer PALA <palaomer100@gmail.com>
---
 .../bindings/iio/adc/adi,ad7816.yaml          | 82 +++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7816.yaml

diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7816.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7816.yaml
new file mode 100644
index 000000000..1ffaa4a68
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7816.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad7816.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices ADC AD7816
+
+maintainers:
+  - Omer PALA <palaomer100@gmail.com>
+
+description: |
+  This schema defines devicetree rules for
+  Analog Devices ADC AD7816
+
+properties:
+  compatible:
+    enum:
+      - adi,ad7816
+      - adi,ad7817
+      - adi,ad7818
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency: true
+
+  interrupts:
+    maxItems: 1
+    description: Base interrupt pin for AD7816
+
+  rdwr-gpios:
+    maxItems: 1
+    description: I/O control pin
+
+  convert-gpios:
+    maxItems: 1
+    description: Conversion start pin
+
+  busy-gpios:
+    maxItems: 1
+    description: Busy pin
+
+required:
+  - compatible
+  - reg
+  - rdwr-gpios
+  - convert-gpios
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - adi,ad7816
+              - adi,ad7817
+
+    then:
+      required:
+        - busy-gpios
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      adc@0 {
+        compatible = "adi,ad7816";
+        reg = <0>;
+        spi-max-frequency = <1000000>;
+
+        rdwr-gpios = <&gpio0 1 0>;
+        convert-gpios = <&gpio0 2 0>;
+        busy-gpios = <&gpio0 3 0>;
+      };
+    };
-- 
2.55.0