dt-bindings: iio: light: add Broadcom APDS9999

Add Device Tree binding for the Broadcom APDS9999 ambient light
and proximity sensor. A separate binding file is used rather
than merging with avago,apds9300.yaml because the APDS9999
has an additional vcsel-supply for the VCSEL.

The APDS9999 features individual R, G, B, and IR channels with
a green channel that uses optical coating to approximate the
human eye spectral response for ALS/lux measurements. Calibrated
RGB color sensing is not yet implemented in the driver.

Signed-off-by: Jose A. Perez de Azpillaga <azpijr@gmail.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Author: Onebit5

Documentation/devicetree/bindings/iio/light/brcm,apds9999.yaml

@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/brcm,apds9999.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+title: Broadcom APDS-9999 Digital Proximity and RGB Sensor
+
+maintainers:
+  - Jose A. Perez de Azpillaga <azpijr@gmail.com>
+
+description: |
+  Broadcom APDS-9999 is a digital proximity and RGB sensor with
+  ambient light sensing (ALS) capability. The device uses individual
+  R, G, B, and IR channels plus a Vertical Cavity Surface Emitting
+  Laser (VCSEL) for proximity detection.
+
+  Datasheet: https://docs.broadcom.com/docs/APDS-9999-DS
+
+properties:
+  compatible:
+    enum:
+      - brcm,apds9999
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+
+  vcsel-supply:
+    description: VCSEL power supply (VVCSEL pin)
+
+  interrupts:
+    maxItems: 1
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - vdd-supply
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        light-sensor@52 {
+            compatible = "brcm,apds9999";
+            reg = <0x52>;
+            vdd-supply = <&vdd_reg>;
+            vcsel-supply = <&vcsel_reg>;
+        };
+    };

MAINTAINERS

@@ -4992,6 +4992,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/iio/light/brcm,apds9160.yaml
 F:	drivers/iio/light/apds9160.c
 
+BROADCOM APDS9999 AMBIENT LIGHT SENSOR DRIVER
+M:	Jose A. Perez de Azpillaga <azpijr@gmail.com>
+L:	linux-iio@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/light/brcm,apds9999.yaml
+
 BROADCOM ASP 2.0 ETHERNET DRIVER
 M:	Justin Chen <justin.chen@broadcom.com>
 M:	Florian Fainelli <florian.fainelli@broadcom.com>