Subject: [PATCH 2/2] arm64: dts: rockchip: add Tinkerboard 3 and 3S device tree

From: [email-masked]
Date: Tue, 11 Nov 2025 17:20:23 +0000 (UTC)

From: Michael Opdenacker <[email-masked]>

Add initial device tree support for Asus Tinkerboard 3 [1] and 3S [2],
which are SBCs based on the Rockchip 3566 SoC.

The "3S" version ("S" for "storage") just adds a 16 GB eMMC
and a "mask ROM" DIP switch (to mask the eMMC and enter "Mask ROM"
mode for recovery) to the "3" version.

This adds support for:
- Debug UART (/dev/ttyS2)
- SD card (/dev/mmcblk1)
- eMMC (/dev/mmcblk0, only on Tinkerboard 3S)
- I2C:
  - i2c0 (internal bus with a PMIC and regulators)
  - i2c2 (internal bus with an at24 eeprom and an RTC device)
- USB 2.0 ports
- 2 GPIO LEDS

Link: https://tinker-board.asus.com/series/tinker-board-3.html [1]
Link: https://tinker-board.asus.com/series/tinker-board-3s.html [2]
Signed-off-by: Michael Opdenacker <[email-masked]>
---
 arch/arm64/boot/dts/rockchip/Makefile         |   2 +
 .../boot/dts/rockchip/rk3566-tinker-3.dts     |  14 +
 .../boot/dts/rockchip/rk3566-tinker-3.dtsi    | 264 ++++++++++++++++++
 .../boot/dts/rockchip/rk3566-tinker-3s.dts    |  30 ++
 4 files changed, 310 insertions(+)
 create mode 100644 arch/arm64/boot/dts/rockchip/rk3566-tinker-3.dts
 create mode 100644 arch/arm64/boot/dts/rockchip/rk3566-tinker-3.dtsi
 create mode 100644 arch/arm64/boot/dts/rockchip/rk3566-tinker-3s.dts

diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
index ad684e3831bc..381831cab20c 100644
--- a/arch/arm64/boot/dts/rockchip/Makefile
+++ b/arch/arm64/boot/dts/rockchip/Makefile
@@ -130,6 +130,8 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-lubancat-1.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-nanopi-r3s.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-bigtreetech-cb2-manta.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-bigtreetech-pi2.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-tinker-3.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-tinker-3s.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-bpi-r2-pro.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-evb1-v10.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3568-fastrhino-r66s.dtb
diff --git a/arch/arm64/boot/dts/rockchip/rk3566-tinker-3.dts b/arch/arm64/boot/dts/rockchip/rk3566-tinker-3.dts
new file mode 100644
index 000000000000..938af35b9004
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/rk3566-tinker-3.dts
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2025 Michael Opdenacker <[email-masked]>
+ */
+
+/dts-v1/;
+
+#include "rk3566-tinker-3.dtsi"
+
+/ {
+	model = "Rockchip RK3566 Asus Tinker Board 3";
+	compatible = "asus,rk3566-tinker-3", "rockchip,rk3566";
+};
+
diff --git a/arch/arm64/boot/dts/rockchip/rk3566-tinker-3.dtsi b/arch/arm64/boot/dts/rockchip/rk3566-tinker-3.dtsi
new file mode 100644
index 000000000000..45269d33b0cb
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/rk3566-tinker-3.dtsi
@@ -0,0 +1,264 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2025 Michael Opdenacker <[email-masked]>
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+#include <dt-bindings/soc/rockchip,vop2.h>
+#include "rk3566.dtsi"
+
+/ {
+	aliases {
+		serial2 = &uart2;
+		mmc1 = &sdmmc0;
+		i2c0 = &i2c0;
+		i2c2 = &i2c2;
+	};
+
+	chosen {
+		stdout-path = "serial2:1500000n8";
+	};
+
+	vcc3v3_sys: regulator-3v3-vcc-sys {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc3v3_sys";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vcc5v0_sys>;
+	};
+
+	vcc5v0_sys: regulator-5v0-vcc-sys {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc5v0_sys";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+	};
+
+	vcc5v0_usb_host: regulator-5v0-vcc-usb-host {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpios = <&gpio0 RK_PA6 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&usb_host_pwren_h>;
+		regulator-name = "vcc5v0_usb_host";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&vcc5v0_sys>;
+	};
+
+	gpio_leds: gpio-leds {
+		compatible = "gpio-leds";
+
+		act-led {
+			gpios = <&gpio0 RK_PD4 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger="mmc1";
+};
+
+		rsv-led {
+			gpios = <&gpio0 RK_PD6 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger="none";
+		};
+	};
+};
+
+&uart2 {
+	status = "okay";
+};
+
+&i2c0 {
+	status = "okay";
+
+	rk809: pmic@20 {
+		compatible = "rockchip,rk809";
+		reg = <0x20>;
+		assigned-clocks = <&cru I2S1_MCLKOUT_TX>;
+		assigned-clock-parents = <&cru CLK_I2S1_8CH_TX>;
+		#clock-cells = <1>;
+		clocks = <&cru I2S1_MCLKOUT_TX>;
+		clock-names = "mclk";
+		clock-output-names = "rk809-clkout1", "rk809-clkout2";
+		interrupt-parent = <&gpio0>;
+		interrupts = <RK_PA3 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pmic_int_l>, <&i2s1m0_mclk>;
+		#sound-dai-cells = <0>;
+		system-power-controller;
+		wakeup-source;
+
+		vcc1-supply = <&vcc3v3_sys>;
+		vcc2-supply = <&vcc3v3_sys>;
+		vcc3-supply = <&vcc3v3_sys>;
+		vcc4-supply = <&vcc3v3_sys>;
+		vcc5-supply = <&vcc3v3_sys>;
+		vcc6-supply = <&vcc3v3_sys>;
+		vcc7-supply = <&vcc3v3_sys>;
+		vcc8-supply = <&vcc3v3_sys>;
+		vcc9-supply = <&vcc3v3_sys>;
+
+		regulators {
+			vcc_1v8: DCDC_REG5 {
+				regulator-name = "vcc_1v8";
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			vcc3v3_sd: SWITCH_REG2 {
+				regulator-name = "vcc3v3_sd";
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			vccio_sd: LDO_REG5 {
+				regulator-name = "vccio_sd";
+				regulator-always-on;
+				regulator-boot-on;
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+
+			vcc_3v3: SWITCH_REG1 {
+				regulator-name = "vcc_3v3";
+				regulator-always-on;
+				regulator-boot-on;
+
+				regulator-state-mem {
+					regulator-off-in-suspend;
+				};
+			};
+		};
+	};
+
+	vdd_cpu: regulator@40 {
+		compatible = "silergy,syr827";
+		reg = <0x40>;
+		fcs,suspend-voltage-selector = <1>;
+		regulator-name = "vdd_cpu";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <830000>;
+		regulator-max-microvolt = <1200000>;
+		regulator-ramp-delay = <2300>;
+		vin-supply = <&vcc3v3_sys>;
+
+		regulator-state-mem {
+			regulator-off-in-suspend;
+		};
+	};
+};
+
+&i2c2 {
+	status = "okay";
+
+	m24c08@50 {
+		compatible = "atmel,24c08";
+		reg = <0x50>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&tb3_eeprom>;
+		status = "okay";
+	};
+
+	rtc_isl1208: rtc@6f {
+		compatible = "isil,isl1208";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_externalrtc_reg>;
+		interrupt-names = "irq";
+		interrupts-extended = <&gpio0 RK_PD3 IRQ_TYPE_EDGE_FALLING>;
+		reg = <0x6f>;
+		status = "okay";
+	};
+};
+
+&sdmmc0 {
+	bus-width = <4>;
+	cap-sd-highspeed;
+	disable-wp;
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdmmc0_bus4 &sdmmc0_clk &sdmmc0_cmd &sdmmc0_det>;
+	vmmc-supply = <&vcc3v3_sd>;
+	vqmmc-supply = <&vccio_sd>;
+	status = "okay";
+};
+
+&usb_host0_ehci {
+	status = "okay";
+};
+
+&usb_host0_ohci {
+	status = "okay";
+};
+
+&usb_host1_ehci {
+	status = "okay";
+};
+
+&usb_host1_ohci {
+	status = "okay";
+};
+
+&usb2phy0 {
+	status = "okay";
+};
+
+&usb2phy0_host {
+	phy-supply = <&vcc5v0_usb_host>;
+	status = "okay";
+};
+
+&usb2phy1 {
+	status = "okay";
+};
+
+&usb2phy1_host {
+	phy-supply = <&vcc5v0_usb_host>;
+	status = "okay";
+};
+
+&pinctrl {
+	pmic {
+		pmic_int_l: pmic-int-l {
+			rockchip,pins = <0 RK_PA3 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
+
+	usb {
+		usb_host_pwren_h: usb-host-pwren-h {
+			rockchip,pins = <0 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		usb_otg_pwren_h: usb-otg-pwren-h {
+			rockchip,pins = <0 RK_PA5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
+	rtc {
+		pinctrl_externalrtc_reg: externalrtcreggrp {
+			rockchip,pins = <0 RK_PD3 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
+
+	eeprom {
+		tb3_eeprom: tb3-eeprom {
+			rockchip,pins = <3 RK_PC1 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/rockchip/rk3566-tinker-3s.dts b/arch/arm64/boot/dts/rockchip/rk3566-tinker-3s.dts
new file mode 100644
index 000000000000..ba7efd702050
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/rk3566-tinker-3s.dts
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (C) 2025 Michael Opdenacker <[email-masked]>
+ */
+
+/dts-v1/;
+
+#include "rk3566-tinker-3.dtsi"
+
+/ {
+	model = "Rockchip RK3566 Asus Tinker Board 3S";
+	compatible = "asus,rk3566-tinker-3s", "asus,rk3566-tinker-3", "rockchip,rk3566";
+
+	aliases {
+		mmc0 = &sdhci;
+	};
+};
+
+&sdhci {
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	max-frequency = <200000000>;
+	mmc-hs200-1_8v;
+	non-removable;
+	pinctrl-names = "default";
+	pinctrl-0 = <&emmc_bus8 &emmc_clk &emmc_cmd &emmc_datastrobe>;
+	vmmc-supply = <&vcc_3v3>;
+	vqmmc-supply = <&vcc_1v8>;
+	status = "okay";
+};