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Message-ID: <1b17fb1b-9235-43b5-a57e-6b04fe8f4516@linaro.org>
Date: Thu, 15 Jan 2026 11:25:45 +0100
From: neil.armstrong@...aro.org
To: Nick Xie <nick@...das.com>, khilman@...libre.com, jbrunet@...libre.com,
martin.blumenstingl@...glemail.com, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-amlogic@...ts.infradead.org
Cc: xianwei.zhao@...ogic.com, christianshewitt@...il.com, krzk+dt@...nel.org,
robh@...nel.org, conor+dt@...nel.org, nick@...qinick.com
Subject: Re: [PATCH v3 3/3] arm64: dts: meson-s4-s905y4-khadas-vim1s: add
initial device tree
On 1/15/26 04:00, Nick Xie wrote:
> 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@...das.com>
> ---
> arch/arm64/boot/dts/amlogic/Makefile | 1 +
> .../amlogic/meson-s4-s905y4-khadas-vim1s.dts | 190 ++++++++++++++++++
> 2 files changed, 191 insertions(+)
> create mode 100644 arch/arm64/boot/dts/amlogic/meson-s4-s905y4-khadas-vim1s.dts
>
> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
> index 219fb088c704d..15f9c817e5023 100644
> --- a/arch/arm64/boot/dts/amlogic/Makefile
> +++ b/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
> diff --git a/arch/arm64/boot/dts/amlogic/meson-s4-s905y4-khadas-vim1s.dts b/arch/arm64/boot/dts/amlogic/meson-s4-s905y4-khadas-vim1s.dts
> new file mode 100644
> index 0000000000000..79ffc703a2e99
> --- /dev/null
> +++ b/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@...0000 {
> + 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>;
> + };
> +};
> +
> +ðmac {
> + 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";
> +};
Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>
Thanks,
Neil
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