io: light: tcs3472: Add TMD3782 proximity support

Documentation/devicetree/bindings/iio/light/amstaos,tcs3472.yaml

@@ -0,0 +1,84 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/amstaos,tcs3472.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AMS/TAOS TCS3472/TMD3782 Color Light and Proximity Sensor
+
+maintainers:
+  - Peter Meerwald <pmeerw@pmeerw.net>
+
+description: |
+  RGBC color light-to-digital converter with optional proximity detection.
+  TCS3472 provides 4-channel RGBC sensing. TMD3782 adds an integrated
+  proximity detector with IR LED driver. The TMD3782 family also includes
+  TMD37825/TMD37827 variants at I2C address 0x29 (same die, untested).
+
+  TCS3472 datasheet:
+    https://ams.com/documents/20143/36005/TCS3472_DS000190_1-00.pdf
+
+properties:
+  compatible:
+    enum:
+      - amstaos,tcs3472
+      - amstaos,tmd3782
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  vdd-supply:
+    description: Regulator that provides power to the sensor
+
+  vddio-supply:
+    description: Regulator that provides power to the I2C bus
+
+  vled-supply:
+    description: Regulator that provides power to the proximity IR LED
+
+  led-max-microamp:
+    description: Maximum proximity LED drive current in microamps
+    enum:
+      - 12500
+      - 25000
+      - 50000
+      - 100000
+
+  amstaos,proximity-pulse-count:
+    description:
+      Number of proximity IR LED pulses per measurement cycle.
+      Higher values increase signal strength at the cost of power.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    maximum: 255
+    default: 8
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        light-sensor@39 {
+                compatible = "amstaos,tmd3782";
+                reg = <0x39>;
+                interrupts = <113 IRQ_TYPE_LEVEL_LOW>;
+                vdd-supply = <&reg_prox_vdd>;
+                vddio-supply = <&pm8916_l5>;
+                vled-supply = <&reg_prox_led>;
+                led-max-microamp = <100000>;
+                amstaos,proximity-pulse-count = <6>;
+        };
+    };
+...

arch/arm64/boot/dts/qcom/msm8916-samsung-a5u-eur.dts

@@ -47,6 +47,16 @@
 		pinctrl-names = "default";
 		pinctrl-0 = <&tkey_en_default>;
 	};
+
+	reg_prox_vled: regulator-prox-vled {
+		compatible = "regulator-fixed";
+		regulator-name = "prox_vled";
+		gpios = <&tlmm 8 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&prox_led_default>;
+		pinctrl-names = "default";
+	};
 };
 
 &accelerometer {
@@ -61,6 +71,23 @@
 	constant-charge-voltage-max-microvolt = <4350000>;
 };
 
+&blsp_i2c2 {
+	light-sensor@39 {
+		compatible = "amstaos,tmd3782";
+		reg = <0x39>;
+		interrupts-extended = <&tlmm 113 IRQ_TYPE_LEVEL_LOW>;
+
+		vddio-supply = <&pm8916_l5>;
+		vled-supply = <&reg_prox_vled>;
+
+		led-max-microamp = <100000>;
+		amstaos,proximity-pulse-count = <6>;
+
+		pinctrl-0 = <&prox_int_default>;
+		pinctrl-names = "default";
+	};
+};
+
 &blsp_i2c5 {
 	status = "okay";
 
@@ -145,4 +172,18 @@
 		drive-strength = <2>;
 		bias-disable;
 	};
+
+	prox_int_default: prox-int-default-state {
+		pins = "gpio113";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
+	prox_led_default: prox-led-default-state {
+		pins = "gpio8";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
 };

arch/arm64/boot/dts/qcom/msm8939-samsung-a7.dts

@@ -166,6 +166,22 @@
 			vdd-supply = <&pm8916_l17>;
 			vddio-supply = <&pm8916_l5>;
 		};
+
+		light-sensor@39 {
+			compatible = "amstaos,tmd3782";
+			reg = <0x39>;
+			interrupts-extended = <&tlmm 113 IRQ_TYPE_LEVEL_LOW>;
+
+			vdd-supply = <&pm8916_l17>;
+			vddio-supply = <&pm8916_l5>;
+			vled-supply = <&pm8916_l17>;
+
+			led-max-microamp = <100000>;
+			amstaos,proximity-pulse-count = <6>;
+
+			pinctrl-0 = <&prox_int_default>;
+			pinctrl-names = "default";
+		};
 	};
 
 	i2c-tkey {
@@ -700,6 +716,13 @@
 		bias-disable;
 	};
 
+	prox_int_default: prox-int-default-state {
+		pins = "gpio113";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
 	reg_tsp_en_default: reg-tsp-en-default-state {
 		pins = "gpio73";
 		function = "gpio";