arm64: dts: rockchip: add overlay for PX30 Ringneck Haikou Video Demo adapter

This adds support for the video-demo-adapter DEVKIT ADDON CAM-TS-A01
(https://embedded.cherry.de/product/development-kit/) for the Haikou
devkit with PX30 Ringneck SoM.

The Video Demo adapter is an adapter connected to the fake PCIe slot
labeled "Video Connector" on the Haikou devkit.

Itss main feature is a Leadtek DSI-display with touchscreen and a camera
(that is not supported yet because the expected clock rate by the driver
cannot be exactly reached by the clock driver). To drive these
components a number of additional regulators are grouped on the adapter
as well as a PCA9670 gpio-expander to provide the needed additional
gpio-lines.

Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
Link: https://lore.kernel.org/r/20250221-ringneck-dtbos-v2-4-310c0b9a3909@cherry.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

2 files changed, 195 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
index b40b82bd0722..0f7c5c55c8b8 100644
--- a/arch/arm64/boot/dts/rockchip/Makefile
+++ b/arch/arm64/boot/dts/rockchip/Makefile
@@ -6,6 +6,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-engicam-px30-core-edimm2.2.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-firefly-jd4-core-mb.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-ringneck-haikou.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-ringneck-haikou-lvds-9904379.dtbo
+dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-ringneck-haikou-video-demo.dtbo
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-bpi-p2-pro.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-evb.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-roc-cc.dtb
@@ -196,6 +197,10 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-ringneck-haikou-haikou-lvds-9904379.dtb
 px30-ringneck-haikou-haikou-lvds-9904379-dtbs := px30-ringneck-haikou.dtb \
 	px30-ringneck-haikou-lvds-9904379.dtbo
 
+dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-ringneck-haikou-haikou-video-demo.dtb
+px30-ringneck-haikou-haikou-video-demo-dtbs := px30-ringneck-haikou.dtb \
+	px30-ringneck-haikou-video-demo.dtbo
+
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-wolfvision-pf5-vz-2-uhd.dtb
 rk3568-wolfvision-pf5-vz-2-uhd-dtbs := rk3568-wolfvision-pf5.dtb \
 	rk3568-wolfvision-pf5-display-vz.dtbo \
diff --git a/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou-video-demo.dtso b/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou-video-demo.dtso
new file mode 100644
index 000000000000..7d9ea5aa5984
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/px30-ringneck-haikou-video-demo.dtso
@@ -0,0 +1,190 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2025 Cherry Embedded Solutions GmbH
+ *
+ * DEVKIT ADDON CAM-TS-A01
+ * https://embedded.cherry.de/product/development-kit/
+ *
+ * DT-overlay for the camera / DSI demo appliance for Haikou boards.
+ * In the flavour for use with a Ringneck system-on-module.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/clock/px30-cru.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+
+&{/} {
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		power-supply = <&dc_12v>;
+		pwms = <&pwm0 0 25000 0>;
+	};
+
+	cam_afvdd_2v8: regulator-cam-afvdd-2v8 {
+		compatible  = "regulator-fixed";
+		gpio = <&pca9670 2 GPIO_ACTIVE_LOW>;
+		regulator-max-microvolt = <2800000>;
+		regulator-min-microvolt = <2800000>;
+		regulator-name = "cam-afvdd-2v8";
+		vin-supply = <&vcc2v8_video>;
+	};
+
+	cam_avdd_2v8: regulator-cam-avdd-2v8 {
+		compatible  = "regulator-fixed";
+		gpio = <&pca9670 4 GPIO_ACTIVE_LOW>;
+		regulator-max-microvolt = <2800000>;
+		regulator-min-microvolt = <2800000>;
+		regulator-name = "cam-avdd-2v8";
+		vin-supply = <&vcc2v8_video>;
+	};
+
+	cam_dovdd_1v8: regulator-cam-dovdd-1v8 {
+		compatible  = "regulator-fixed";
+	        gpio = <&pca9670 3 GPIO_ACTIVE_LOW>;
+	        regulator-max-microvolt = <1800000>;
+	        regulator-min-microvolt = <1800000>;
+	        regulator-name = "cam-dovdd-1v8";
+	        vin-supply = <&vcc1v8_video>;
+	};
+
+	cam_dvdd_1v2: regulator-cam-dvdd-1v2 {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpio = <&pca9670 5 GPIO_ACTIVE_HIGH>;
+		regulator-max-microvolt = <1200000>;
+		regulator-min-microvolt = <1200000>;
+		regulator-name = "cam-dvdd-1v2";
+		vin-supply = <&vcc3v3_baseboard>;
+	};
+
+	vcc1v8_video: regulator-vcc1v8-video {
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-max-microvolt = <1800000>;
+		regulator-min-microvolt = <1800000>;
+		regulator-name = "vcc1v8-video";
+		vin-supply = <&vcc3v3_baseboard>;
+	};
+
+	vcc2v8_video: regulator-vcc2v8-video {
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-max-microvolt = <2800000>;
+		regulator-min-microvolt = <2800000>;
+		regulator-name = "vcc2v8-video";
+		vin-supply = <&vcc3v3_baseboard>;
+	};
+
+	video-adapter-leds {
+		compatible = "gpio-leds";
+
+		video-adapter-led {
+			color = <LED_COLOR_ID_BLUE>;
+			gpios = <&pca9670 7 GPIO_ACTIVE_HIGH>;
+			label = "video-adapter-led";
+			linux,default-trigger = "none";
+		};
+	};
+};
+
+&display_subsystem {
+	status = "okay";
+};
+
+&dsi {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	panel@0 {
+		compatible = "leadtek,ltk050h3148w";
+		reg = <0>;
+		backlight = <&backlight>;
+		iovcc-supply = <&vcc1v8_video>;
+		reset-gpios = <&pca9670 0 GPIO_ACTIVE_LOW>;
+		vci-supply = <&vcc2v8_video>;
+
+		port {
+			mipi_in_panel: endpoint {
+				remote-endpoint = <&mipi_out_panel>;
+			};
+		};
+	};
+};
+
+&dsi_dphy {
+	status = "okay";
+};
+
+&dsi_out {
+	mipi_out_panel: endpoint {
+		remote-endpoint = <&mipi_in_panel>;
+	};
+};
+
+&i2c1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	/* OV5675, GT911, DW9714 are limited to 400KHz */
+	clock-frequency = <400000>;
+
+	touchscreen@14 {
+		compatible = "goodix,gt911";
+		reg = <0x14>;
+		interrupt-parent = <&gpio0>;
+		interrupts = <RK_PA0 IRQ_TYPE_LEVEL_LOW>;
+		irq-gpios = <&gpio0 RK_PA0 GPIO_ACTIVE_HIGH>;
+		pinctrl-0 = <&touch_int>;
+		pinctrl-names = "default";
+		reset-gpios = <&pca9670 1 GPIO_ACTIVE_HIGH>;
+		AVDD28-supply = <&vcc2v8_video>;
+		VDDIO-supply = <&vcc3v3_baseboard>;
+	};
+
+	pca9670: gpio@27 {
+		compatible = "nxp,pca9670";
+		reg = <0x27>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		pinctrl-0 = <&pca9670_resetn>;
+		pinctrl-names = "default";
+		reset-gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&pinctrl {
+	pca9670 {
+		pca9670_resetn: pca9670-resetn {
+			rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
+	touch {
+		touch_int: touch-int {
+			rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+};
+
+&vopb {
+	status = "okay";
+};
+
+&vopb_mmu {
+	status = "okay";
+};
+
+&vopl {
+	status = "okay";
+};
+
+&vopl_mmu {
+	status = "okay";
+};