From: Shrikant Raskar <raskar.shree97@gmail.com>

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>
---
 .../bindings/iio/proximity/rfdigital,rfd77402.yaml | 53 ++++++++++++++++++++++
 .../devicetree/bindings/vendor-prefixes.yaml       |  2 +
 2 files changed, 55 insertions(+)

diff --git a/Documentation/devicetree/bindings/iio/proximity/rfdigital,rfd77402.yaml b/Documentation/devicetree/bindings/iio/proximity/rfdigital,rfd77402.yaml
new file mode 100644
index 000000000000..1ef6326b209e
--- /dev/null
+++ b/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>;
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index c7591b2aec2a..59ac4f0756d9 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/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,.*":

-- 
2.43.0

On Thu, 01 Jan 2026 21:47:38 +0530
Shrikant Raskar via B4 Relay <devnull+raskar.shree97.gmail.com@kernel.org> wrote:

> From: Shrikant Raskar <raskar.shree97@gmail.com>
> 
> 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>
Given the first two patches of this series are ready to go and
independent of the last one I'll apply them now.

Applied patches 1 and 2 to the togreg branch of iio.git and pushed out as testing.
Just send the last two in v5.


Thanks,

Jonathan

> ---
>  .../bindings/iio/proximity/rfdigital,rfd77402.yaml | 53 ++++++++++++++++++++++
>  .../devicetree/bindings/vendor-prefixes.yaml       |  2 +
>  2 files changed, 55 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/iio/proximity/rfdigital,rfd77402.yaml b/Documentation/devicetree/bindings/iio/proximity/rfdigital,rfd77402.yaml
> new file mode 100644
> index 000000000000..1ef6326b209e
> --- /dev/null
> +++ b/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>;
> +        };
> +    };
> +...
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index c7591b2aec2a..59ac4f0756d9 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/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,.*":
>