arm64: dts: meson-s4-s905y4-khadas-vim1s: add initial device tree

The Khadas VIM1S uses the Amlogic S905Y4 SoC, based on the
Amlogic S4 SoC family, on a board with the same form factor as the
VIM/VIM2/VIM3/VIM4 models. Serial debug console, ethernet, SD card
work with this initial device tree.

It features:
 - 2GB LPDDR4 RAM
 - 16GB eMMC 5.1 storage
 - 32MB SPI flash
 - 100M Ethernet
 - AP6256 Wireless (802.11 a/b/g/n/ac, BT5.0)
 - HDMI 2.1 video
 - 2x USB 2.0 ports
 - 1x USB-C (power) with USB 2.0 OTG
 - 2x LED's (1x red, 1x white)
 - 3x buttons (power, function, reset)
 - IR receiver
 - 40pin GPIO Header
 - 1x micro SD card slot

Signed-off-by: Nick Xie <nick@khadas.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260115030015.1334517-4-nick@khadas.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

Author: numbqq

arch/arm64/boot/dts/amlogic/Makefile

@@ -85,6 +85,7 @@ dtb-$(CONFIG_ARCH_MESON) += meson-gxm-ugoos-am3.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxm-vega-s96.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-gxm-wetek-core2.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-s4-s805x2-aq222.dtb
+dtb-$(CONFIG_ARCH_MESON) += meson-s4-s905y4-khadas-vim1s.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-sm1-a95xf3-air-gbit.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-sm1-a95xf3-air.dtb
 dtb-$(CONFIG_ARCH_MESON) += meson-sm1-bananapi-m2-pro.dtb

arch/arm64/boot/dts/amlogic/meson-s4-s905y4-khadas-vim1s.dts

@@ -0,0 +1,190 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2026 Khadas Technology Co., Ltd.
+ */
+
+/dts-v1/;
+
+#include "meson-s4.dtsi"
+
+/ {
+	model = "Khadas VIM1S";
+	compatible = "khadas,vim1s", "amlogic,s905y4", "amlogic,s4";
+	interrupt-parent = <&gic>;
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	aliases {
+		mmc0 = &emmc; /* eMMC */
+		mmc1 = &sd; /* SD card */
+		mmc2 = &sdio; /* SDIO */
+		serial0 = &uart_b;
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x80000000>;
+	};
+
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		/* 52 MiB reserved for ARM Trusted Firmware */
+		secmon_reserved: secmon@5000000 {
+			reg = <0x0 0x05000000 0x0 0x3400000>;
+			no-map;
+		};
+	};
+
+	sdio_32k: sdio-32k {
+		compatible = "pwm-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+		pwms = <&pwm_ef 0 30518 0>; /* PWM_E at 32.768KHz */
+	};
+
+	sdio_pwrseq: sdio-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&gpio GPIOX_6 GPIO_ACTIVE_LOW>;
+		clocks = <&sdio_32k>;
+		clock-names = "ext_clock";
+	};
+
+	main_5v: regulator-main-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "5V";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+	};
+
+	sd_3v3: regulator-sd-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "SD_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		gpio = <&gpio GPIOD_4 GPIO_ACTIVE_LOW>;
+		regulator-always-on;
+	};
+
+	vddio_sd: regulator-vddio-sd {
+		compatible = "regulator-gpio";
+		regulator-name = "VDDIO_SD";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+		gpios = <&gpio GPIOD_9 GPIO_ACTIVE_HIGH>;
+		gpios-states = <1>;
+		states = <1800000 1
+				3300000 0>;
+	};
+
+	/* SY8120B1ABC DC/DC Regulator. */
+	vddcpu: regulator-vddcpu {
+		compatible = "pwm-regulator";
+
+		regulator-name = "VDDCPU";
+		regulator-min-microvolt = <689000>;
+		regulator-max-microvolt = <1049000>;
+
+		vin-supply = <&main_5v>;
+
+		pwms = <&pwm_ij 1 1500 0>;
+		pwm-dutycycle-range = <100 0>;
+
+		regulator-boot-on;
+		regulator-always-on;
+		/* Voltage Duty-Cycle */
+		voltage-table = <1049000 0>,
+				<1039000 3>,
+				<1029000 6>,
+				<1019000 9>,
+				<1009000 12>,
+				<999000 14>,
+				<989000 17>,
+				<979000 20>,
+				<969000 23>,
+				<959000 26>,
+				<949000 29>,
+				<939000 31>,
+				<929000 34>,
+				<919000 37>,
+				<909000 40>,
+				<899000 43>,
+				<889000 45>,
+				<879000 48>,
+				<869000 51>,
+				<859000 54>,
+				<849000 56>,
+				<839000 59>,
+				<829000 62>,
+				<819000 65>,
+				<809000 68>,
+				<799000 70>,
+				<789000 73>,
+				<779000 76>,
+				<769000 79>,
+				<759000 81>,
+				<749000 84>,
+				<739000 87>,
+				<729000 89>,
+				<719000 92>,
+				<709000 95>,
+				<699000 98>,
+				<689000 100>;
+	};
+};
+
+&ethmac {
+	status = "okay";
+	phy-handle = <&internal_ephy>;
+	phy-mode = "rmii";
+};
+
+&ir {
+	status = "okay";
+	pinctrl-0 = <&remote_pins>;
+	pinctrl-names = "default";
+};
+
+&pwm_ef {
+	status = "okay";
+	pinctrl-0 = <&pwm_e_pins1>;
+	pinctrl-names = "default";
+};
+
+&pwm_ij {
+	status = "okay";
+};
+
+&sd {
+	status = "okay";
+	pinctrl-0 = <&sdcard_pins>;
+	pinctrl-1 = <&sdcard_clk_gate_pins>;
+	pinctrl-names = "default", "clk-gate";
+	bus-width = <4>;
+	cap-sd-highspeed;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+	max-frequency = <200000000>;
+	disable-wp;
+
+	cd-gpios = <&gpio GPIOC_6 GPIO_ACTIVE_LOW>;
+
+	vmmc-supply = <&sd_3v3>;
+	vqmmc-supply = <&vddio_sd>;
+};
+
+&spicc0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&spicc0_pins_x>;
+	cs-gpios = <&gpio GPIOX_10 GPIO_ACTIVE_LOW>;
+};
+
+&uart_b {
+	status = "okay";
+};