[PATCH v6 4/4] dt-bindings: iio: humidity: Add TI HDC302x support

[Li peiyu <579lpy@gmail.com>]

Add device tree bindings for HDC3020/HDC3021/HDC3022 humidity and
temperature sensors.

Signed-off-by: Li peiyu <579lpy@gmail.com>
---
changes in v6:
  - remove items before "- const: ti,hdc3020".
  - add vdd-supply to required.
changes in v4:
  - removed unnecessary example.
  - add vdd-supply to the example.
changes in v3:
  - Use a fallback compatible.
changes in v2:
  - change the maintainers to me.
  - hdc3020,hdc3021,hdc3022 are compatible,I've changed the dirver.
  - change the node name to humidity-sensor.

 .../bindings/iio/humidity/ti,hdc3020.yaml     | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml

diff --git a/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml b/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml
new file mode 100644
index 000000000000..7f6d0f9edc75
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/humidity/ti,hdc3020.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/humidity/ti,hdc3020.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HDC3020/HDC3021/HDC3022 humidity and temperature iio sensors
+
+maintainers:
+  - Li peiyu <579lpy@gmail.com>
+  - Javier Carrasco <javier.carrasco.cruz@gmail.com>
+
+description:
+  https://www.ti.com/lit/ds/symlink/hdc3020.pdf
+
+  The HDC302x is an integrated capacitive based relative humidity (RH)
+  and temperature sensor.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - ti,hdc3021
+              - ti,hdc3022
+          - const: ti,hdc3020
+      - const: ti,hdc3020
+
+  interrupts:
+    maxItems: 1
+
+  vdd-supply: true
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        humidity-sensor@47 {
+            compatible = "ti,hdc3021", "ti,hdc3020";
+            reg = <0x47>;
+            vdd-supply = <&vcc_3v3>;
+        };
+    };
-- 
2.34.1