[PATCH v4 1/4] arm64: dts: rk3399-pinephone-pro: Add light/proximity sensor support

[Rudraksha Gupta via B4 Relay]

From: Ondrej Jirman <megi at xff.cz>

Pinephone Pro uses STK3311 according to the schematics.

Tests:
~ $ hwtest # output tweaked to fit in 80 chars
Category  proximity
Model     stk3310
Path      /sys/bus/iio/devices/iio:device0
Status    working
Value     59.3 (when covered) and 2.2 (when uncovered)

Category  illuminance
Model     stk3310
Path      /sys/bus/iio/devices/iio:device0
Status    working
Value     1 (when covered) and 101 (when uncovered)

~ $ monitor-sensor
    // When the sensor is exposed, it get's fluctating values such as
    Light changed: 1.800000 (lux)
    Light changed: 1.700000 (lux)
    Light changed: 1.800000 (lux)
    Light changed: 1.700000 (lux)
    Light changed: 1.600000 (lux)
    Light changed: 1.100000 (lux)
    // When covering the sensor, it prints a low value and stops printing
    Light changed: 0.200000 (lux)

Co-developed-by: Martijn Braam <martijn at brixit.nl>
Signed-off-by: Martijn Braam <martijn at brixit.nl>
Co-developed-by: Kamil Trzciński <ayufan at ayufan.eu>
Signed-off-by: Kamil Trzciński <ayufan at ayufan.eu>
Signed-off-by: Ondrej Jirman <megi at xff.cz>
Signed-off-by: Rudraksha Gupta <guptarud at gmail.com>
---
 arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
index 6f97e57f36f5599f4027a0f3db98bcbc69cef5e5..71d32c4bae0d0336ac0c912043618fc9b94919ef 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-pinephone-pro.dts
@@ -520,6 +520,15 @@ touchscreen at 14 {
 		touchscreen-size-x = <720>;
 		touchscreen-size-y = <1440>;
 	};
+
+	light-sensor at 48 {
+		compatible = "sensortek,stk3311";
+		reg = <0x48>;
+		interrupt-parent = <&gpio4>;
+		interrupts = <RK_PD3 IRQ_TYPE_EDGE_FALLING>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&stk3311_int>;
+	};
 };
 
 &i2c4 {
@@ -689,6 +698,12 @@ vcc1v8_codec_en: vcc1v8-codec-en {
 		};
 	};
 
+	stk3311 {
+		stk3311_int: stk3311-int {
+			rockchip,pins = <4 RK_PD3 RK_FUNC_GPIO &pcfg_input_pull_up>;
+		};
+	};
+
 	wireless-bluetooth {
 		bt_wake_pin: bt-wake-pin {
 			rockchip,pins = <2 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>;

-- 
2.51.0