ARM: dts: amlogic: Add TCU Fernsehfee 3.0

Fernsehfee[1] ("TV fairy") 3.0 is a set-top box with HDMI input and
output ports. It originally ran Android 4.4 and a Linux 3.10 kernel.

The following features are tested and known to work:

- Ethernet
- Power LED (switching between green and red)
- Power button
- eMMC
- SD Card
- USB
- Wifi

The following features are untested or not working:

- HDMI input and output
- Infrared remote control input and output

[1]: https://fernsehfee.de/ (German), https://telefairy.com/ (English)

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: J. Neuschäfer <j.ne@posteo.net>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20250428-fernsehfee-v2-3-293b98a43a91@posteo.net
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

arch/arm/boot/dts/amlogic/Makefile

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 dtb-$(CONFIG_MACH_MESON8) += \
 	meson8-minix-neo-x8.dtb \
+	meson8-fernsehfee3.dtb \
 	meson8b-ec100.dtb \
 	meson8b-mxq.dtb \
 	meson8b-odroidc1.dtb \

arch/arm/boot/dts/amlogic/meson8-fernsehfee3.dts

@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+// Copyright (C) 2025 J. Neuschäfer <j.ne@posteo.net>
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/linux-event-codes.h>
+#include <dt-bindings/leds/common.h>
+
+#include "meson8.dtsi"
+
+/ {
+	model = "Fernsehfee 3.0";
+	compatible = "tcu,fernsehfee3", "amlogic,meson8";
+
+	aliases {
+		serial0 = &uart_AO;
+		gpiochip0 = &gpio;
+		gpiochip1 = &gpio_ao;
+		i2c0 = &i2c_AO;
+		i2c1 = &i2c_B;
+		mmc0 = &sdhc;
+		mmc1 = &sdio;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x40000000>;  /* 1 GiB */
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys-polled";
+		poll-interval = <100>;
+
+		power-button {
+			label = "Power button";
+			linux,code = <KEY_POWER>;
+			gpios = <&gpio_ao GPIOAO_3 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led-0 {
+			/*
+			 * The power LED can be turned red, otherwise it is green.
+			 */
+			gpios = <&gpio_ao GPIO_TEST_N GPIO_ACTIVE_LOW>;
+			function = LED_FUNCTION_POWER;
+			color = <LED_COLOR_ID_RED>;
+		};
+	};
+
+	vcc_5v: regulator-5v {
+		/* 5V rail, always on as long as the system is running */
+		compatible = "regulator-fixed";
+		regulator-name = "5V";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+	};
+
+	vcc_3v3: regulator-3v3 {
+		/* Chipown AP2420 step-down converter */
+		compatible = "regulator-fixed";
+		regulator-name = "3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vcc_5v>;
+	};
+
+	wifi_3v3: regulator-wifi {
+		compatible = "regulator-fixed";
+		regulator-name = "3.3V-WIFI";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vcc_3v3>;
+		gpio = <&gpio GPIOX_11 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+};
+
+&ethmac {
+	status = "okay";
+	pinctrl-0 = <&eth_pins>;
+	pinctrl-names = "default";
+	phy-handle = <&eth_phy0>;
+	phy-mode = "rmii";
+
+	mdio {
+		compatible = "snps,dwmac-mdio";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		eth_phy0: ethernet-phy@0 {
+			/* IC Plus IP101A (0x02430c54) */
+			reg = <0>;
+
+			reset-assert-us = <10000>;
+			reset-deassert-us = <10000>;
+			reset-gpios = <&gpio GPIOH_4 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&i2c_AO {
+	status = "okay";
+	pinctrl-0 = <&i2c_ao_pins>;
+	pinctrl-names = "default";
+
+	pmic@32 {
+		compatible = "ricoh,rn5t618";
+		reg = <0x32>;
+		system-power-controller;
+	};
+
+	eeprom@50 {
+		/* Fairchild FM24C08A */
+		compatible = "atmel,24c08";
+		reg = <0x50>;
+		pagesize = <16>;
+		wp-gpios = <&gpio GPIOH_3 GPIO_ACTIVE_HIGH>;
+		num-addresses = <4>;
+	};
+};
+
+&i2c_B {
+	status = "okay";
+	pinctrl-0 = <&i2c_b_pins>;
+	pinctrl-names = "default";
+
+	/* TODO: SiI9293 HDMI receiver @ 0x39 */
+};
+
+&sdhc {
+	status = "okay";
+	pinctrl-0 = <&sdxc_c_pins>;
+	pinctrl-names = "default";
+
+	/* eMMC */
+	bus-width = <8>;
+	max-frequency = <100000000>;
+
+	disable-wp;
+	cap-mmc-highspeed;
+	mmc-hs200-1_8v;
+	no-sdio;
+
+	vmmc-supply = <&vcc_3v3>;
+	vqmmc-supply = <&vcc_3v3>;
+};
+
+&sdio {
+	status = "okay";
+	pinctrl-0 = <&sd_b_pins>;
+
+	/* SD card */
+	slot@1 {
+		compatible = "mmc-slot";
+		reg = <1>;
+		status = "okay";
+
+		bus-width = <4>;
+		cap-mmc-highspeed;
+		cap-sd-highspeed;
+		disable-wp;
+
+		cd-gpios = <&gpio CARD_6 GPIO_ACTIVE_LOW>;
+
+		vmmc-supply = <&vcc_3v3>;
+	};
+};
+
+&uart_AO {
+	status = "okay";
+	pinctrl-0 = <&uart_ao_a_pins>;
+	pinctrl-names = "default";
+};
+
+&usb0 {
+	status = "okay";
+};
+
+&usb0_phy {
+	status = "okay";
+};
+
+&usb1 {
+	status = "okay";
+	dr_mode = "host";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	wifi: wifi@1 {
+		/* Realtek RTL8188 2.4GHz WiFi module */
+		compatible = "usbbda,179";
+		reg = <1>;
+		vdd-supply = <&wifi_3v3>;
+	};
+};
+
+&usb1_phy {
+	status = "okay";
+};
+
+&ir_receiver {
+	status = "okay";
+	pinctrl-0 = <&ir_recv_pins>;
+	pinctrl-names = "default";
+};

arch/arm/boot/dts/amlogic/meson8.dtsi

@@ -481,6 +481,14 @@ gpio: bank@80 {
 			gpio-ranges = <&pinctrl_cbus 0 0 120>;
 		};
 
+		i2c_b_pins: i2c-b {
+			mux {
+				groups = "i2c_sda_b", "i2c_sck_b";
+				function = "i2c_b";
+				bias-disable;
+			};
+		};
+
 		sd_a_pins: sd-a {
 			mux {
 				groups = "sd_d0_a", "sd_d1_a", "sd_d2_a",
@@ -526,6 +534,16 @@ mux {
 			};
 		};
 
+		sdxc_c_pins: sdxc-c {
+			mux {
+				groups = "sdxc_d0_c", "sdxc_d13_c",
+					"sdxc_clk_c", "sdxc_cmd_c",
+					"sdxc_d47_c";
+				function = "sdxc_c";
+				bias-pull-up;
+			};
+		};
+
 		spdif_out_pins: spdif-out {
 			mux {
 				groups = "spdif_out";