dt-bindings: iio: proximity: Add RF Digital RFD77402 ToF sensor

The RF Digital RFD77402 is a Time-of-Flight (ToF) proximity and distance
sensor that provides absolute and highly accurate distance measurements
from 100 mm up to 2000 mm over an I2C interface. It includes an optional
interrupt pin that signals when new measurement data is ready.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Shrikant Raskar <raskar.shree97@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/proximity/rfdigital,rfd77402.yaml

@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/proximity/rfdigital,rfd77402.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RF Digital RFD77402 ToF sensor
+
+maintainers:
+  - Shrikant Raskar <raskar.shree97@gmail.com>
+
+description:
+  The RF Digital RFD77402 is a Time-of-Flight (ToF) proximity and distance
+  sensor providing up to 200 mm range measurement over an I2C interface.
+
+properties:
+  compatible:
+    const: rfdigital,rfd77402
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+    description:
+      Interrupt asserted when a new distance measurement is available.
+
+  vdd-supply:
+    description: Regulator that provides power to the sensor.
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        proximity@4c {
+            compatible = "rfdigital,rfd77402";
+            reg = <0x4c>;
+            vdd-supply = <&vdd_3v3>;
+            interrupt-parent = <&gpio>;
+            interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
+        };
+    };
+...

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -1361,6 +1361,8 @@ patternProperties:
     description: Revolution Robotics, Inc. (Revotics)
   "^rex,.*":
     description: iMX6 Rex Project
+  "^rfdigital,.*":
+    description: RF Digital Corporation
   "^richtek,.*":
     description: Richtek Technology Corporation
   "^ricoh,.*":