[PATCH v3 2/2] arm64: dts: qcom: qcs6490-rubikpi3: Add IMX219 camera overlays

[Hongyang Zhao <hongyang.zhao@thundersoft.com>]

RUBIK Pi 3 ships without camera sensors, and its two connectors support
multiple modules. Keep module-specific nodes out of the base board DTS
and add per-connector overlays for Raspberry Pi Camera Module V2 IMX219
sensors.

CAM1 uses CCI1 and CSIPHY1, while CAM2 uses CCI0 and CSIPHY4. Each
overlay describes the 24 MHz sensor input clock and models the module
power domain controlled through the connector PWR_EN signal. The
baseboard supplies VCC3V3_OUTPUT separately and has no per-camera
regulator.

Describe each connector CAMERA_GPIO signal as a privacy indicator LED
and associate it with the corresponding sensor. This lets the V4L2 core
control the LED while the sensor is streaming.

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hongyang Zhao <hongyang.zhao@thundersoft.com>
---
 arch/arm64/boot/dts/qcom/Makefile                  |  15 +++
 .../qcs6490-thundercomm-rubikpi3-cam1-imx219.dtso  | 115 +++++++++++++++++++++
 .../qcs6490-thundercomm-rubikpi3-cam2-imx219.dtso  | 115 +++++++++++++++++++++
 3 files changed, 245 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index 1c86e7e98f55..c4afe71436c4 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -186,6 +186,21 @@ dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-industrial-mezzanine.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-rb3gen2-vision-mezzanine.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-thundercomm-minipc-g1iot.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-thundercomm-rubikpi3.dtb
+
+qcs6490-thundercomm-rubikpi3-cam1-imx219-dtbs := \
+	qcs6490-thundercomm-rubikpi3.dtb \
+	qcs6490-thundercomm-rubikpi3-cam1-imx219.dtbo
+qcs6490-thundercomm-rubikpi3-cam2-imx219-dtbs := \
+	qcs6490-thundercomm-rubikpi3.dtb \
+	qcs6490-thundercomm-rubikpi3-cam2-imx219.dtbo
+qcs6490-thundercomm-rubikpi3-dual-imx219-dtbs := \
+	qcs6490-thundercomm-rubikpi3.dtb \
+	qcs6490-thundercomm-rubikpi3-cam1-imx219.dtbo \
+	qcs6490-thundercomm-rubikpi3-cam2-imx219.dtbo
+
+dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-thundercomm-rubikpi3-cam1-imx219.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-thundercomm-rubikpi3-cam2-imx219.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-thundercomm-rubikpi3-dual-imx219.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs6490-vicharak-axon-mini.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= qcs8300-ride.dtb
 
diff --git a/arch/arm64/boot/dts/qcom/qcs6490-thundercomm-rubikpi3-cam1-imx219.dtso b/arch/arm64/boot/dts/qcom/qcs6490-thundercomm-rubikpi3-cam1-imx219.dtso
new file mode 100644
index 000000000000..b6d7a8235720
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/qcs6490-thundercomm-rubikpi3-cam1-imx219.dtso
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2026, Thundercomm All rights reserved.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+
+&{/} {
+	cam1_imx219_clk: clock-camera1-24m {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+	};
+
+	leds-camera1 {
+		compatible = "gpio-leds";
+
+		pinctrl-0 = <&cam1_privacy_led_state>;
+		pinctrl-names = "default";
+
+		cam1_privacy_led: led-camera1 {
+			function = LED_FUNCTION_INDICATOR;
+			function-enumerator = <1>;
+			gpios = <&tlmm 18 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+	};
+
+	/* Camera module power domain controlled through connector PWR_EN. */
+	vreg_cam1_pwr: regulator-camera1-pwr {
+		compatible = "regulator-fixed";
+
+		regulator-name = "vreg_camera1_pwr";
+
+		gpio = <&tlmm 57 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&cam1_pwr_en>;
+		pinctrl-names = "default";
+
+		vin-supply = <&vreg_vcc3v3_output>;
+	};
+};
+
+&camss {
+	vdda-phy-supply = <&vreg_l10c_0p88>;
+	vdda-pll-supply = <&vreg_l6b_1p2>;
+
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@1 {
+			reg = <1>;
+
+			csiphy1_ep: endpoint {
+				data-lanes = <0 1>;
+				remote-endpoint = <&cam1_imx219_ep>;
+			};
+		};
+	};
+};
+
+&cci1 {
+	status = "okay";
+};
+
+&cci1_i2c0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	camera@10 {
+		compatible = "sony,imx219";
+		reg = <0x10>;
+
+		clocks = <&cam1_imx219_clk>;
+
+		VANA-supply = <&vreg_cam1_pwr>;
+		VDIG-supply = <&vreg_cam1_pwr>;
+		VDDL-supply = <&vreg_cam1_pwr>;
+
+		leds = <&cam1_privacy_led>;
+		led-names = "privacy";
+
+		port {
+			cam1_imx219_ep: endpoint {
+				data-lanes = <1 2>;
+				link-frequencies = /bits/ 64 <456000000>;
+				remote-endpoint = <&csiphy1_ep>;
+			};
+		};
+	};
+};
+
+&tlmm {
+	cam1_privacy_led_state: cam1-privacy-led-state {
+		pins = "gpio18";
+		function = "gpio";
+		drive-strength = <8>;
+		bias-disable;
+	};
+
+	cam1_pwr_en: cam1-pwr-en-state {
+		pins = "gpio57";
+		function = "gpio";
+		drive-strength = <8>;
+		bias-disable;
+	};
+};
diff --git a/arch/arm64/boot/dts/qcom/qcs6490-thundercomm-rubikpi3-cam2-imx219.dtso b/arch/arm64/boot/dts/qcom/qcs6490-thundercomm-rubikpi3-cam2-imx219.dtso
new file mode 100644
index 000000000000..ff1ccf965df8
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/qcs6490-thundercomm-rubikpi3-cam2-imx219.dtso
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2026, Thundercomm All rights reserved.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+
+&{/} {
+	cam2_imx219_clk: clock-camera2-24m {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24000000>;
+	};
+
+	leds-camera2 {
+		compatible = "gpio-leds";
+
+		pinctrl-0 = <&cam2_privacy_led_state>;
+		pinctrl-names = "default";
+
+		cam2_privacy_led: led-camera2 {
+			function = LED_FUNCTION_INDICATOR;
+			function-enumerator = <2>;
+			gpios = <&tlmm 19 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+	};
+
+	/* Camera module power domain controlled through connector PWR_EN. */
+	vreg_cam2_pwr: regulator-camera2-pwr {
+		compatible = "regulator-fixed";
+
+		regulator-name = "vreg_camera2_pwr";
+
+		gpio = <&tlmm 58 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&cam2_pwr_en>;
+		pinctrl-names = "default";
+
+		vin-supply = <&vreg_vcc3v3_output>;
+	};
+};
+
+&camss {
+	vdda-phy-supply = <&vreg_l10c_0p88>;
+	vdda-pll-supply = <&vreg_l6b_1p2>;
+
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@4 {
+			reg = <4>;
+
+			csiphy4_ep: endpoint {
+				data-lanes = <0 1>;
+				remote-endpoint = <&cam2_imx219_ep>;
+			};
+		};
+	};
+};
+
+&cci0 {
+	status = "okay";
+};
+
+&cci0_i2c0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	camera@10 {
+		compatible = "sony,imx219";
+		reg = <0x10>;
+
+		clocks = <&cam2_imx219_clk>;
+
+		VANA-supply = <&vreg_cam2_pwr>;
+		VDIG-supply = <&vreg_cam2_pwr>;
+		VDDL-supply = <&vreg_cam2_pwr>;
+
+		leds = <&cam2_privacy_led>;
+		led-names = "privacy";
+
+		port {
+			cam2_imx219_ep: endpoint {
+				data-lanes = <1 2>;
+				link-frequencies = /bits/ 64 <456000000>;
+				remote-endpoint = <&csiphy4_ep>;
+			};
+		};
+	};
+};
+
+&tlmm {
+	cam2_privacy_led_state: cam2-privacy-led-state {
+		pins = "gpio19";
+		function = "gpio";
+		drive-strength = <8>;
+		bias-disable;
+	};
+
+	cam2_pwr_en: cam2-pwr-en-state {
+		pins = "gpio58";
+		function = "gpio";
+		drive-strength = <8>;
+		bias-disable;
+	};
+};

-- 
2.43.0