arm64: dts: qcom: sm8550-hdk: Add SM8550-HDK Rear Camera Card overlay

Lantronix SM8550-HDK board may be equipped with a Rear Camera Card PCB
which contains:
* Samsung S3K33D time-of-fligt image sensor connected to CSIPHY0 (TOF),
* Omnivision OV64B40 image sensor connected to CSIPHY1 (uWide),
* Sony IMX766 image sensor connected to CSIPHY2 (Wide),
* Samsung S5K3M5 image sensor connected to CSIPHY3 (Tele),
* two flash leds.

The change adds support of a Samsung S5K3M5 camera image sensor and
two flash leds on the external camera card module.

Signed-off-by: Vladimir Zapolskiy <[e-mail]>
Reviewed-by: Konrad Dybcio <[e-mail]>
Reviewed-by: Neil Armstrong <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bjorn Andersson <[e-mail]>

arch/arm64/boot/dts/qcom/Makefile

···
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8450-samsung-r0q.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8450-sony-xperia-nagara-pdx223.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8450-sony-xperia-nagara-pdx224.dtb
+
+sm8550-hdk-rear-camera-card-dtbs	:= sm8550-hdk.dtb sm8550-hdk-rear-camera-card.dtbo
+
+dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-hdk-rear-camera-card.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-hdk.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-mtp.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8550-qrd.dtb

arch/arm64/boot/dts/qcom/sm8550-hdk-rear-camera-card.dtso

···
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * SM8550-HDK Rear Camera Card overlay
+ *
+ * Copyright (c) 2025, Linaro Limited
+ */
+
+#include <dt-bindings/clock/qcom,sm8550-camcc.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+
+/dts-v1/;
+/plugin/;
+
+&camss {
+	status = "okay";
+
+	vdda-phy-supply = <&vreg_l1e_0p88>;
+	vdda-pll-supply = <&vreg_l3e_1p2>;
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@3 {
+			reg = <3>;
+
+			csiphy3_ep: endpoint {
+				clock-lanes = <4>;
+				data-lanes = <0 1 2 3>;
+				remote-endpoint = <&cam_tele>;
+			};
+		};
+	};
+};
+
+&cci1 {
+	status = "okay";
+};
+
+&cci1_i2c0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	sensor@10 {
+		compatible = "samsung,s5k3m5";
+		reg = <0x10>;
+		clocks = <&camcc CAM_CC_MCLK3_CLK>;
+		assigned-clocks = <&camcc CAM_CC_MCLK3_CLK>;
+		assigned-clock-rates = <24000000>;
+		reset-gpios = <&tlmm 119 GPIO_ACTIVE_LOW>;
+		pinctrl-0 = <&cam3_default>;
+		pinctrl-names = "default";
+		afvdd-supply = <&vreg_l7n_2p96>;
+		avdd-supply = <&vreg_l4m_2p8>;
+		dovdd-supply = <&vreg_l5n_1p8>;
+		dvdd-supply = <&vreg_l2m_1p056>;
+
+		port {
+			cam_tele: endpoint {
+				link-frequencies = /bits/ 64 <602500000>;
+				data-lanes = <0 1 2 3>;
+				remote-endpoint = <&csiphy3_ep>;
+			};
+		};
+	};
+};
+
+&pm8550_flash {
+	status = "okay";
+
+	led-0 {
+		function = LED_FUNCTION_FLASH;
+		color = <LED_COLOR_ID_YELLOW>;
+		led-sources = <1>, <4>;
+		led-max-microamp = <500000>;
+		flash-max-microamp = <2000000>;
+		flash-max-timeout-us = <1280000>;
+		function-enumerator = <0>;
+	};
+
+	led-1 {
+		function = LED_FUNCTION_FLASH;
+		color = <LED_COLOR_ID_WHITE>;
+		led-sources = <2>, <3>;
+		led-max-microamp = <500000>;
+		flash-max-microamp = <2000000>;
+		flash-max-timeout-us = <1280000>;
+		function-enumerator = <1>;
+	};
+};