On Tue, Jun 24, 2025 at 01:04:01PM +0200, Wojciech Dubowik wrote:
> Add initial support for Mettler-Toledo Snowflake V2 terminal.
> The board is using Kontron SL i.MX 8M Mini SoM with 1GB RAM.
>
> Supported board features:
> * 7" Display with touchscreen
> * RS-232
> * I2S Audio
> * SD-card/eMMC
> * USB
>
> Signed-off-by: Tobias Graemer <tobias.grae...@mt.com>
> Signed-off-by: Wojciech Dubowik <wojciech.dubo...@mt.com>
> ---
> arch/arm64/boot/dts/freescale/Makefile | 1 +
> .../dts/freescale/imx8mm-mt-snowflake-v2.dts | 482 ++++++++++++++++++
> 2 files changed, 483 insertions(+)
> create mode 100644 arch/arm64/boot/dts/freescale/imx8mm-mt-snowflake-v2.dts
>
> diff --git a/arch/arm64/boot/dts/freescale/Makefile
> b/arch/arm64/boot/dts/freescale/Makefile
> index 0b473a23d120..86f2f1580696 100644
> --- a/arch/arm64/boot/dts/freescale/Makefile
> +++ b/arch/arm64/boot/dts/freescale/Makefile
> @@ -128,6 +128,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mm-iot-gateway.dtb
> dtb-$(CONFIG_ARCH_MXC) += imx8mm-innocomm-wb15-evk.dtb
> dtb-$(CONFIG_ARCH_MXC) += imx8mm-kontron-bl.dtb
> dtb-$(CONFIG_ARCH_MXC) += imx8mm-kontron-bl-osm-s.dtb
> +dtb-$(CONFIG_ARCH_MXC) += imx8mm-mt-snowflake-v2.dtb
> dtb-$(CONFIG_ARCH_MXC) += imx8mm-mx8menlo.dtb
> dtb-$(CONFIG_ARCH_MXC) += imx8mm-nitrogen-r2.dtb
> dtb-$(CONFIG_ARCH_MXC) += imx8mm-phg.dtb
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-mt-snowflake-v2.dts
> b/arch/arm64/boot/dts/freescale/imx8mm-mt-snowflake-v2.dts
> new file mode 100644
> index 000000000000..2bebf528ec37
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-mt-snowflake-v2.dts
> @@ -0,0 +1,482 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2023 Mettler-Toledo GmbH
> + */
> +
> +/dts-v1/;
> +
> +#include "imx8mm-kontron-sl.dtsi"
> +
> +/ {
> + model = "Mettler Toledo i.MX8MM Snowflake V2";
> + compatible = "mt,imx8mm-snowflake-v2", "kontron,imx8mm-sl",
> + "fsl,imx8mm";
> +
> + chosen {
> + stdout-path = &uart3;
> + };
> +
> + aliases {
> + ethernet1 = &usbnet;
> + };
> +
> + backlight: backlight {
> + compatible = "pwm-backlight";
> + pwms = <&pwm1 0 500000 0>;
> + power-supply = <®_5v>;
> + brightness-levels = <0 100>;
> + num-interpolated-steps = <100>;
> + default-brightness-level = <100>;
> + status = "okay";
We usually use "okay" status to enable "disabled" devices. It doesn't
seem to be needed here.
> + };
> +
> + panel {
> + compatible = "edt,etml0700y5dha";
> + backlight = <&backlight>;
> + power-supply = <®_vdd_3v3>;
> +
> + port {
> + panel_in: endpoint {
> + remote-endpoint = <&bridge_out>;
> + };
> + };
> + };
> +
> + max98357a: audio-codec {
> + compatible = "maxim,max98357a";
> + sdmode-gpios = <&gpio4 19 GPIO_ACTIVE_HIGH>;
> + #sound-dai-cells = <0>;
> + status = "okay";
Ditto
> + };
> +
> + reg_5v: regulator-5v {
> + compatible = "regulator-fixed";
> + regulator-name = "fixed-5V";
> + regulator-min-microvolt = <5000000>;
> + regulator-max-microvolt = <5000000>;
> + };
> +
> + reg_sn65dsi83_1v8: regulator-sn65dsi83-1v8 {
> + compatible = "regulator-fixed";
> + regulator-name = "SN65DSI83_1V8";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + };
> +
> + sound-max98357a {
> + compatible = "simple-audio-card";
> + simple-audio-card,name = "max98357a-audio";
> +
Unneeded newline
> + simple-audio-card,format = "i2s";
> + simple-audio-card,frame-master = <&cpudai>;
> + simple-audio-card,bitclock-master = <&cpudai>;
> + simple-audio-card,widgets =
> + "Speaker", "Speakers";
> + simple-audio-card,routing =
> + "Speakers", "Speaker";
> + status = "okay";
Unneeded "okay"
> +
> + cpudai: simple-audio-card,cpu {
> + sound-dai = <&sai1>;
> + dai-tdm-slot-num = <2>;
> + dai-tdm-slot-width = <32>;
> + };
> +
> + simple-audio-card,codec {
> + sound-dai = <&max98357a>;
> + clocks = <&clk IMX8MM_CLK_SAI1_ROOT>;
> + };
> + };
> +};
> +
> +&sai1 {
> + #sound-dai-cells = <0>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_sai1>;
> + assigned-clocks = <&clk IMX8MM_CLK_SAI1>;
> + assigned-clock-parents = <&clk IMX8MM_AUDIO_PLL1_OUT>;
> + assigned-clock-rates = <24576000>;
> + fsl,sai-mclk-direction-output;
> + status = "okay";
> +};
> +
> +&i2c1 {
Can we sort the labeling nodes alphabetically?
> + bootph-all;
Drop u-boot properties.
> + status = "okay";
> +};
> +
> +&i2c2 {
> + bootph-all;
> + status = "okay";
> +};
> +
> +&i2c4 {
> + clock-frequency = <400000>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_i2c4>;
> + status = "okay";
> +
> + eeprom: eeprom@54 {
> + compatible = "atmel,24c08";
> + reg = <0x54>;
> + pagesize = <16>;
> + };
> +
> + touchscreen: touchscreen@41 {
Sort I2C devices in slave address.
> + compatible = "ilitek,ili251x";
> + reg = <0x41>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_touch>;
> + interrupt-parent = <&gpio1>;
> + interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
> + reset-gpios = <&gpio3 16 GPIO_ACTIVE_LOW>;
> + };
> +
> + lvds: lvds@2c {
> + compatible = "ti,sn65dsi83";
> + reg = <0x2c>;
> + vcc-supply = <®_sn65dsi83_1v8>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_sn65dsi83>;
Have a newline between properties and child node.
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
Ditto
> + bridge_in: endpoint {
> + remote-endpoint = <&mipi_dsi_out>;
> + data-lanes = <1 2>;
> + };
> + };
> +
> + port@2 {
> + reg = <2>;
> + bridge_out: endpoint {
> + remote-endpoint = <&panel_in>;
> + data-lanes = <4 3 2 1>;
> + };
> + };
> + };
> + };
> +
> + usbc-cc-controller@61 {
> + compatible = "ti,tusb320";
> + reg = <0x61>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_usbc_controller>;
> + interrupts-extended = <&gpio1 6 IRQ_TYPE_LEVEL_LOW>;
> + };
> +};
> +
> +&mipi_dsi {
> + status = "okay";
Please end property list with 'status'.
Shawn
> + vddio-supply = <®_sn65dsi83_1v8>;
> + assigned-clocks = <&clk IMX8MM_CLK_DSI_CORE>,
> + <&clk IMX8MM_VIDEO_PLL1_OUT>,
> + <&clk IMX8MM_CLK_DSI_PHY_REF>;
> + assigned-clock-parents = <&clk IMX8MM_SYS_PLL1_266M>,
> + <&clk IMX8MM_VIDEO_PLL1_BYPASS>,
> + <&clk IMX8MM_CLK_24M>;
> + assigned-clock-rates = <266000000>, <594000000>, <12000000>;
> + samsung,pll-clock-frequency = <12000000>;
> + samsung,burst-clock-frequency = <891000000>;
> + samsung,esc-clock-frequency = <54000000>;
> +};
> +
> +&mipi_dsi_out {
> + remote-endpoint = <&bridge_in>;
> +};
> +
> +&lcdif {
> + status = "okay";
> +};
> +
> +&gpu_2d {
> + status = "okay";
> +};
> +
> +&gpu_3d {
> + status = "okay";
> +};
> +
> +&ecspi1 {
> + status = "disabled";
> +};
> +
> +&gpio1 {
> + bootph-pre-ram;
> +};
> +
> +&gpio2 {
> + bootph-pre-ram;
> +};
> +
> +&gpio3 {
> + bootph-pre-ram;
> +};
> +
> +&gpio4 {
> + bootph-pre-ram;
> +};
> +
> +&gpio5 {
> + bootph-pre-ram;
> + status_led_controller_oe: status-led-controller-hog {
> + gpio-hog;
> + gpios = <4 GPIO_ACTIVE_HIGH>;
> + output-low;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_hog_status_led_controller>;
> + };
> +};
> +
> +&pca9450 {
> + bootph-pre-ram;
> + regulators {
> + bootph-pre-ram;
> + };
> +};
> +
> +&iomuxc {
> + pinctrl-0 = <&pinctrl_hog>;
> + pinctrl-names = "default";
> +
> + pinctrl_hog: hoggrp {
> + fsl,pins = <
> + MX8MM_IOMUXC_GPIO1_IO03_GPIO1_IO3 0x19 /*
> \SOM_RTC_INT */
> + MX8MM_IOMUXC_GPIO1_IO09_GPIO1_IO9 0x184
> /* SOM_DIS_ID0 */
> + MX8MM_IOMUXC_GPIO1_IO10_GPIO1_IO10 0x184
> /* SOM_DIS_ID1 */
> + MX8MM_IOMUXC_GPIO1_IO11_GPIO1_IO11 0x184
> /* SOM_DIS_ID2 */
> + MX8MM_IOMUXC_SAI2_TXC_GPIO4_IO25 0x19 /*
> SOM_PCB_ID0 */
> + MX8MM_IOMUXC_SAI2_TXD0_GPIO4_IO26 0x19 /*
> SOM_PCB_ID1 */
> + MX8MM_IOMUXC_SAI2_MCLK_GPIO4_IO27 0x19 /*
> SOM_PCBA_ID0 */
> + MX8MM_IOMUXC_SAI3_RXFS_GPIO4_IO28 0x19 /*
> SOM_PCBA_ID1 */
> + MX8MM_IOMUXC_SAI5_RXFS_GPIO3_IO19 0x19 /*
> \SOM_STATLED_RES */
> + MX8MM_IOMUXC_SAI5_RXC_GPIO3_IO20 0x19 /*
> \SOM_HUB_RES */
> + MX8MM_IOMUXC_SAI5_RXD0_GPIO3_IO21 0x19 /*
> \SOM_SUPPLY_EN */
> + MX8MM_IOMUXC_SAI5_RXD1_GPIO3_IO22 0x1c4
> /* \SOM_COM_RES */
> + MX8MM_IOMUXC_SAI5_RXD2_GPIO3_IO23 0x184
> /* SOM_DBG_GPIO0 */
> + MX8MM_IOMUXC_SAI5_RXD3_GPIO3_IO24 0x184
> /* SOM_DBG_GPIO1 */
> + MX8MM_IOMUXC_SAI5_MCLK_GPIO3_IO25 0x184
> /* SOM_DBG_GPIO2 */
> + MX8MM_IOMUXC_SAI3_TXD_GPIO5_IO1 0x184
> /* SOM_DBG_GPIO3 */
> + MX8MM_IOMUXC_SAI1_TXD7_GPIO4_IO19 0x184
> /* SOM_AUDIO_SD */
> + >;
> + };
> +
> + pinctrl_i2c4: i2c4grp {
> + fsl,pins = <
> + MX8MM_IOMUXC_I2C4_SCL_I2C4_SCL
> 0x400001c3
> + MX8MM_IOMUXC_I2C4_SDA_I2C4_SDA
> 0x400001c3
> + >;
> + };
> +
> + pinctrl_pwm1: pwm1grp {
> + fsl,pins = <
> + MX8MM_IOMUXC_SPDIF_EXT_CLK_PWM1_OUT 0x6
> + >;
> + };
> +
> + pinctrl_pwm2: pwm2grp {
> + fsl,pins = <
> + MX8MM_IOMUXC_SPDIF_RX_PWM2_OUT 0x6
> + >;
> + };
> +
> + pinctrl_pwm3: pwm3grp {
> + fsl,pins = <
> + MX8MM_IOMUXC_SPDIF_TX_PWM3_OUT 0x6
> + >;
> + };
> +
> + pinctrl_sai1: sai1grp {
> + fsl,pins = <
> + MX8MM_IOMUXC_SAI1_TXFS_SAI1_TX_SYNC 0xd6
> + MX8MM_IOMUXC_SAI1_TXC_SAI1_TX_BCLK 0xd6
> + MX8MM_IOMUXC_SAI1_TXD0_SAI1_TX_DATA0 0xd6
> + >;
> + };
> +
> + pinctrl_sn65dsi83: sn65dsi83grp {
> + fsl,pins = <
> + MX8MM_IOMUXC_GPIO1_IO05_GPIO1_IO5 0x19 /*
> \SOM_DSI_INT */
> + >;
> + };
> +
> + pinctrl_hog_status_led_controller: statusledcontrollergrp {
> + fsl,pins = <
> + MX8MM_IOMUXC_SPDIF_RX_GPIO5_IO4 0x19
> + >;
> + };
> +
> + pinctrl_touch: touchgrp {
> + fsl,pins = <
> + MX8MM_IOMUXC_GPIO1_IO01_GPIO1_IO1 0x19 /*
> \SOM_TOUCH_RES */
> + MX8MM_IOMUXC_NAND_READY_B_GPIO3_IO16 0x19 /*
> \SOM_TOUCH_INT */
> + >;
> + };
> +
> + pinctrl_uart1: uart1grp {
> + bootph-pre-ram;
> + fsl,pins = <
> + MX8MM_IOMUXC_SAI2_RXC_UART1_DCE_RX 0x140
> + MX8MM_IOMUXC_SAI2_RXFS_UART1_DCE_TX 0x140
> + MX8MM_IOMUXC_SAI2_RXD0_UART1_DCE_RTS_B 0x140
> + MX8MM_IOMUXC_SAI2_TXFS_UART1_DCE_CTS_B 0x140
> + >;
> + };
> +
> + pinctrl_usbc_controller: usbccontrollergrp {
> + fsl,pins = <
> + MX8MM_IOMUXC_GPIO1_IO06_GPIO1_IO6 0x19 /*
> \SOM_USBC_INT */
> + >;
> + };
> +
> + pinctrl_usdhc2: usdhc2grp {
> + bootph-pre-ram;
> + fsl,pins = <
> + MX8MM_IOMUXC_SD2_CLK_USDHC2_CLK 0x190
> + MX8MM_IOMUXC_SD2_CMD_USDHC2_CMD 0x1d0
> + MX8MM_IOMUXC_SD2_DATA0_USDHC2_DATA0 0x1d0
> + MX8MM_IOMUXC_SD2_DATA1_USDHC2_DATA1 0x1d0
> + MX8MM_IOMUXC_SD2_DATA2_USDHC2_DATA2 0x1d0
> + MX8MM_IOMUXC_SD2_DATA3_USDHC2_DATA3 0x1d0
> + MX8MM_IOMUXC_SD2_CD_B_GPIO2_IO12 0x41
> + >;
> + };
> +
> + pinctrl_usdhc2_100mhz: usdhc2-100mhzgrp {
> + bootph-pre-ram;
> + fsl,pins = <
> + MX8MM_IOMUXC_SD2_CLK_USDHC2_CLK 0x194
> + MX8MM_IOMUXC_SD2_CMD_USDHC2_CMD 0x1d4
> + MX8MM_IOMUXC_SD2_DATA0_USDHC2_DATA0 0x1d4
> + MX8MM_IOMUXC_SD2_DATA1_USDHC2_DATA1 0x1d4
> + MX8MM_IOMUXC_SD2_DATA2_USDHC2_DATA2 0x1d4
> + MX8MM_IOMUXC_SD2_DATA3_USDHC2_DATA3 0x1d4
> + MX8MM_IOMUXC_SD2_CD_B_GPIO2_IO12 0x41
> + >;
> + };
> +
> + pinctrl_usdhc2_200mhz: usdhc2-200mhzgrp {
> + bootph-pre-ram;
> + fsl,pins = <
> + MX8MM_IOMUXC_SD2_CLK_USDHC2_CLK 0x196
> + MX8MM_IOMUXC_SD2_CMD_USDHC2_CMD 0x1d6
> + MX8MM_IOMUXC_SD2_DATA0_USDHC2_DATA0 0x1d6
> + MX8MM_IOMUXC_SD2_DATA1_USDHC2_DATA1 0x1d6
> + MX8MM_IOMUXC_SD2_DATA2_USDHC2_DATA2 0x1d6
> + MX8MM_IOMUXC_SD2_DATA3_USDHC2_DATA3 0x1d6
> + MX8MM_IOMUXC_SD2_CD_B_GPIO2_IO12 0x41
> + >;
> + };
> +};
> +
> +&pinctrl_ecspi1 {
> + bootph-pre-ram;
> +};
> +
> +&pinctrl_i2c1 {
> + bootph-pre-ram;
> +};
> +
> +&pinctrl_pmic {
> + bootph-pre-ram;
> +};
> +
> +&pinctrl_uart3 {
> + bootph-all;
> +};
> +
> +&pinctrl_usdhc1 {
> + bootph-pre-ram;
> +};
> +
> +&pinctrl_usdhc1_100mhz {
> + bootph-pre-ram;
> +};
> +
> +&pinctrl_usdhc1_200mhz {
> + bootph-pre-ram;
> +};
> +
> +&pinctrl_wdog {
> + bootph-pre-ram;
> +};
> +
> +&pwm1 {
> + pinctrl-0 = <&pinctrl_pwm1>;
> + pinctrl-names = "default";
> + status = "okay";
> +};
> +
> +&pwm2 {
> + pinctrl-0 = <&pinctrl_pwm2>;
> + pinctrl-names = "default";
> + status = "okay";
> +};
> +
> +®_nvcc_sd {
> + regulator-always-on;
> + regulator-boot-on;
> + regulator-min-microvolt = <3300000>;
> +};
> +
> +&uart1 {
> + bootph-all;
> + pinctrl-0 = <&pinctrl_uart1>;
> + pinctrl-names = "default";
> + uart-has-rtscts;
> + status = "okay";
> +};
> +
> +&uart3 {
> + bootph-all;
> +};
> +
> +&usbotg1 {
> + bootph-pre-ram;
> + dr_mode = "peripheral";
> + status = "okay";
> +};
> +
> +&usbotg2 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + disable-over-current;
> + dr_mode = "host";
> + status = "okay";
> +
> + usb@1 {
> + reg = <1>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + usbnet: ethernet@1 {
> + compatible = "usb424,9500";
> + reg = <1>;
> + mac-address = [ 00 00 00 00 00 00 ];
> + };
> + };
> +};
> +
> +&usdhc1 {
> + bootph-pre-ram;
> +};
> +
> +&usdhc2 {
> + bootph-pre-ram;
> + bus-width = <4>;
> + cd-gpios = <&gpio2 12 GPIO_ACTIVE_LOW>;
> + no-1-8-v;
> + pinctrl-0 = <&pinctrl_usdhc2>;
> + pinctrl-1 = <&pinctrl_usdhc2_100mhz>;
> + pinctrl-2 = <&pinctrl_usdhc2_200mhz>;
> + pinctrl-names = "default", "state_100mhz", "state_200mhz";
> + vmmc-supply = <®_vdd_3v3>;
> + status = "okay";
> +};
> +
> +&wdog1 {
> + bootph-pre-ram;
> +};
> --
> 2.47.2
>
