dt-bindings: iio: proximity: Add TYHX HX9023S

A capacitive proximity sensor

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Yasin Lee <yasin.lee.x@gmail.com>
Link: https://patch.msgid.link/20240702-add-tyhx-hx9023s-sensor-driver-v9-2-c030f1801d9b@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/proximity/tyhx,hx9023s.yaml

@@ -0,0 +1,93 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/proximity/tyhx,hx9023s.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TYHX HX9023S capacitive proximity sensor
+
+maintainers:
+  - Yasin Lee <yasin.lee.x@gmail.com>
+
+description: |
+  TYHX HX9023S proximity sensor. Datasheet can be found here:
+    http://www.tianyihexin.com/ueditor/php/upload/file/20240614/1718336303992081.pdf
+
+properties:
+  compatible:
+    const: tyhx,hx9023s
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description:
+      Generated by device to announce preceding read request has finished
+      and data is available or that a close/far proximity event has happened.
+    maxItems: 1
+
+  vdd-supply: true
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^channel@[0-4]$":
+    $ref: /schemas/iio/adc/adc.yaml
+    type: object
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        minimum: 0
+        maximum: 4
+        description: The channel number.
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      proximity@2a {
+        compatible = "tyhx,hx9023s";
+        reg = <0x2a>;
+        interrupt-parent = <&pio>;
+        interrupts = <16 IRQ_TYPE_EDGE_FALLING>;
+        vdd-supply = <&pp1800_prox>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        channel@0 {
+          reg = <0>;
+          single-channel = <0>;
+        };
+        channel@1 {
+          reg = <1>;
+          single-channel = <1>;
+        };
+        channel@2 {
+          reg = <2>;
+          single-channel = <2>;
+        };
+        channel@3 {
+          reg = <3>;
+          diff-channels = <1 0>;
+        };
+        channel@4 {
+          reg = <4>;
+          diff-channels = <2 0>;
+        };
+      };
+    };