[PATCH v4 2/3] arm64: dts: freescale: Add support for Variscite DART-MX8M-PLUS
Stefano Radaelli
stefano.radaelli21 at gmail.com
Tue Jun 9 02:04:37 PDT 2026
From: Stefano Radaelli <stefano.r at variscite.com>
Add device tree support for the Variscite DART-MX8MP system on module.
This SOM is designed to be used with various carrier boards.
The module includes:
- NXP i.MX8M Plus MPU processor
- Up to 8GB of LPDDR4 memory
- Up to 128GB of eMMC storage memory
- Integrated 10/100/1000 Mbps Ethernet Transceiver
- Codec audio WM8904
- WIFI6 dual-band 802.11ax/ac/a/b/g/n with optional 802.15.4 and Bluetooth
Only SOM-specific peripherals are enabled by default. Carrier board
specific interfaces are left disabled to be enabled in the respective
carrier board device trees.
Link: https://variscite.com/system-on-module-som/i-mx-8/i-mx-8m-plus/dart-mx8m-plus/
Signed-off-by: Stefano Radaelli <stefano.r at variscite.com>
---
v3->v4:
-
v2->v3:
- Fixed wrong som eth phy address
v1->v2:
- Fixed wrong sai peripheral reference
- Fixed wrong eqos pinctrl gpio
.../boot/dts/freescale/imx8mp-var-dart.dtsi | 476 ++++++++++++++++++
1 file changed, 476 insertions(+)
create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-var-dart.dtsi
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-var-dart.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-var-dart.dtsi
new file mode 100644
index 000000000000..a647a2e0ab94
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/imx8mp-var-dart.dtsi
@@ -0,0 +1,476 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Common dtsi for Variscite DART-MX8M-PLUS
+ *
+ * Link: https://variscite.com/system-on-module-som/i-mx-8/i-mx-8m-plus/dart-mx8m-plus/
+ *
+ * Copyright (C) 2026 Variscite Ltd. - https://www.variscite.com/
+ *
+ */
+
+/dts-v1/;
+
+#include "imx8mp.dtsi"
+
+/ {
+ model = "Variscite DART-MX8M-PLUS Module";
+ compatible = "variscite,var-dart-mx8mp", "fsl,imx8mp";
+
+ reg_audio_supply: regulator-3p3v {
+ compatible = "regulator-fixed";
+ regulator-name = "wm8904-supply";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ };
+
+ reg_phy_vddio: regulator-phy-vddio {
+ compatible = "regulator-fixed";
+ regulator-name = "vddio-1v8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ };
+
+ sound-wm8904 {
+ compatible = "simple-audio-card";
+ simple-audio-card,bitclock-master = <&codec_dai>;
+ simple-audio-card,format = "i2s";
+ simple-audio-card,frame-master = <&codec_dai>;
+ simple-audio-card,mclk-fs = <256>;
+ simple-audio-card,name = "wm8904-audio";
+ simple-audio-card,routing =
+ "Headphone Jack", "HPOUTL",
+ "Headphone Jack", "HPOUTR",
+ "IN2L", "Line In Jack",
+ "IN2R", "Line In Jack",
+ "IN1L", "Microphone Jack",
+ "IN1R", "Microphone Jack";
+ simple-audio-card,widgets =
+ "Microphone", "Microphone Jack",
+ "Headphone", "Headphone Jack",
+ "Line", "Line In Jack";
+
+ codec_dai: simple-audio-card,codec {
+ sound-dai = <&wm8904>;
+ };
+
+ simple-audio-card,cpu {
+ sound-dai = <&sai3>;
+ };
+ };
+
+ wifi_pwrseq: wifi-pwrseq {
+ compatible = "mmc-pwrseq-simple";
+ post-power-on-delay-ms = <100>;
+ power-off-delay-us = <10000>;
+ reset-gpios = <&gpio2 7 GPIO_ACTIVE_LOW>, /* WIFI_RESET */
+ <&gpio2 8 GPIO_ACTIVE_LOW>; /* WIFI_PWR_EN */
+ };
+};
+
+&A53_0 {
+ cpu-supply = <&buck2>;
+};
+
+&A53_1 {
+ cpu-supply = <&buck2>;
+};
+
+&A53_2 {
+ cpu-supply = <&buck2>;
+};
+
+&A53_3 {
+ cpu-supply = <&buck2>;
+};
+
+&eqos {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_eqos>;
+ /*
+ * The required RGMII TX and RX 2ns delays are implemented directly
+ * in hardware via passive delay elements on the SOM PCB.
+ * No delay configuration is needed in software via PHY driver.
+ */
+ phy-mode = "rgmii";
+ phy-handle = <ðphy0>;
+ status = "okay";
+
+ mdio {
+ compatible = "snps,dwmac-mdio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ethphy0: ethernet-phy at 0 {
+ compatible = "ethernet-phy-ieee802.3-c22";
+ reg = <0>;
+ reset-gpios = <&gpio2 11 GPIO_ACTIVE_LOW>;
+ reset-assert-us = <10000>;
+ reset-deassert-us = <100000>;
+ vddio-supply = <®_phy_vddio>;
+ };
+ };
+};
+
+&i2c1 {
+ clock-frequency = <400000>;
+ pinctrl-names = "default", "gpio";
+ pinctrl-0 = <&pinctrl_i2c1>;
+ pinctrl-1 = <&pinctrl_i2c1_gpio>;
+ scl-gpios = <&gpio5 14 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ sda-gpios = <&gpio5 15 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ status = "okay";
+
+ wm8904: audio-codec at 1a {
+ compatible = "wlf,wm8904";
+ reg = <0x1a>;
+ #sound-dai-cells = <0>;
+ clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_SAI3_MCLK1>;
+ clock-names = "mclk";
+ AVDD-supply = <®_audio_supply>;
+ CPVDD-supply = <®_audio_supply>;
+ DBVDD-supply = <®_audio_supply>;
+ DCVDD-supply = <®_audio_supply>;
+ MICVDD-supply = <®_audio_supply>;
+ wlf,drc-cfg-names = "default", "peaklimiter", "tradition",
+ "soft", "music";
+ /*
+ * Config registers per name, respectively:
+ * KNEE_IP = 0, KNEE_OP = 0, HI_COMP = 1, LO_COMP = 1
+ * KNEE_IP = -24, KNEE_OP = -6, HI_COMP = 1/4, LO_COMP = 1
+ * KNEE_IP = -42, KNEE_OP = -3, HI_COMP = 0, LO_COMP = 1
+ * KNEE_IP = -45, KNEE_OP = -9, HI_COMP = 1/8, LO_COMP = 1
+ * KNEE_IP = -30, KNEE_OP = -10.5, HI_COMP = 1/4, LO_COMP = 1
+ */
+ wlf,drc-cfg-regs = /bits/ 16 <0x01af 0x3248 0x0000 0x0000>,
+ /bits/ 16 <0x04af 0x324b 0x0010 0x0408>,
+ /bits/ 16 <0x04af 0x324b 0x0028 0x0704>,
+ /bits/ 16 <0x04af 0x324b 0x0018 0x078c>,
+ /bits/ 16 <0x04af 0x324b 0x0010 0x050e>;
+ /* GPIO1 = DMIC_CLK, don't touch others */
+ wlf,gpio-cfg = <0x0018>, <0xffff>, <0xffff>, <0xffff>;
+ };
+
+ pca9450: pmic at 25 {
+ compatible = "nxp,pca9450c";
+ reg = <0x25>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_pmic>;
+ interrupt-parent = <&gpio1>;
+ interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
+
+ regulators {
+ buck1: BUCK1 {
+ regulator-name = "BUCK1";
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <2187500>;
+ regulator-boot-on;
+ regulator-always-on;
+ regulator-ramp-delay = <3125>;
+ };
+
+ buck2: BUCK2 {
+ regulator-name = "BUCK2";
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <2187500>;
+ regulator-boot-on;
+ regulator-always-on;
+ regulator-ramp-delay = <3125>;
+ nxp,dvs-run-voltage = <950000>;
+ nxp,dvs-standby-voltage = <850000>;
+ };
+
+ buck4: BUCK4 {
+ regulator-name = "BUCK4";
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <3400000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ buck5: BUCK5 {
+ regulator-name = "BUCK5";
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <3400000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ buck6: BUCK6 {
+ regulator-name = "BUCK6";
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <3400000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ ldo1: LDO1 {
+ regulator-name = "LDO1";
+ regulator-min-microvolt = <1600000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ ldo2: LDO2 {
+ regulator-name = "LDO2";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1150000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ ldo3: LDO3 {
+ regulator-name = "LDO3";
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+
+ ldo4: LDO4 {
+ regulator-name = "LDO4";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ };
+
+ ldo5: LDO5 {
+ regulator-name = "LDO5";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ };
+ };
+ };
+};
+
+&mu2 {
+ status = "okay";
+};
+
+&sai3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_sai3>;
+ assigned-clocks = <&clk IMX8MP_CLK_SAI3>;
+ assigned-clock-parents = <&clk IMX8MP_AUDIO_PLL1_OUT>;
+ assigned-clock-rates = <11536000>;
+ clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_SAI3_IPG>,
+ <&clk IMX8MP_CLK_DUMMY>,
+ <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_SAI3_MCLK1>,
+ <&clk IMX8MP_CLK_DUMMY>,
+ <&clk IMX8MP_CLK_DUMMY>;
+ clock-names = "bus", "mclk0", "mclk1", "mclk2", "mclk3";
+ #sound-dai-cells = <0>;
+ fsl,sai-mclk-direction-output;
+ status = "okay";
+};
+
+/* BT module */
+&uart4 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_uart4>, <&pinctrl_bt>;
+ assigned-clocks = <&clk IMX8MP_CLK_UART4>;
+ assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_80M>;
+ uart-has-rtscts;
+ status = "okay";
+
+ bluetooth_iw61x: bluetooth {
+ compatible = "nxp,88w8987-bt";
+ };
+};
+
+/* WIFI */
+&usdhc1 {
+ pinctrl-names = "default", "state_100mhz", "state_200mhz";
+ pinctrl-0 = <&pinctrl_usdhc1>, <&pinctrl_wifi>;
+ pinctrl-1 = <&pinctrl_usdhc1_100mhz>, <&pinctrl_wifi>;
+ pinctrl-2 = <&pinctrl_usdhc1_200mhz>, <&pinctrl_wifi>;
+ mmc-pwrseq = <&wifi_pwrseq>;
+ bus-width = <4>;
+ non-removable;
+ keep-power-in-suspend;
+ status = "okay";
+};
+
+/* eMMC */
+&usdhc3 {
+ pinctrl-names = "default", "state_100mhz", "state_200mhz";
+ pinctrl-0 = <&pinctrl_usdhc3>;
+ pinctrl-1 = <&pinctrl_usdhc3_100mhz>;
+ pinctrl-2 = <&pinctrl_usdhc3_200mhz>;
+ bus-width = <8>;
+ non-removable;
+ status = "okay";
+};
+
+&wdog1 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_wdog>;
+ fsl,ext-reset-output;
+ status = "okay";
+};
+
+&iomuxc {
+ pinctrl_bt: btgrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_SD1_DATA4__GPIO2_IO06 0xc0
+ MX8MP_IOMUXC_SD1_DATA7__GPIO2_IO09 0xc0
+ >;
+ };
+
+ pinctrl_eqos: eqosgrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_ENET_MDC__ENET_QOS_MDC 0x2
+ MX8MP_IOMUXC_ENET_MDIO__ENET_QOS_MDIO 0x2
+ MX8MP_IOMUXC_ENET_RD0__ENET_QOS_RGMII_RD0 0x90
+ MX8MP_IOMUXC_ENET_RD1__ENET_QOS_RGMII_RD1 0x90
+ MX8MP_IOMUXC_ENET_RD2__ENET_QOS_RGMII_RD2 0x90
+ MX8MP_IOMUXC_ENET_RD3__ENET_QOS_RGMII_RD3 0x90
+ MX8MP_IOMUXC_ENET_RXC__CCM_ENET_QOS_CLOCK_GENERATE_RX_CLK 0x90
+ MX8MP_IOMUXC_ENET_RX_CTL__ENET_QOS_RGMII_RX_CTL 0x90
+ MX8MP_IOMUXC_ENET_TD0__ENET_QOS_RGMII_TD0 0x16
+ MX8MP_IOMUXC_ENET_TD1__ENET_QOS_RGMII_TD1 0x16
+ MX8MP_IOMUXC_ENET_TD2__ENET_QOS_RGMII_TD2 0x16
+ MX8MP_IOMUXC_ENET_TD3__ENET_QOS_RGMII_TD3 0x16
+ MX8MP_IOMUXC_ENET_TX_CTL__ENET_QOS_RGMII_TX_CTL 0x16
+ MX8MP_IOMUXC_ENET_TXC__CCM_ENET_QOS_CLOCK_GENERATE_TX_CLK 0x16
+ MX8MP_IOMUXC_SD2_WP__GPIO2_IO20 0x10
+ MX8MP_IOMUXC_SD1_STROBE__GPIO2_IO11 0x150
+ >;
+ };
+
+ pinctrl_i2c1: i2c1grp {
+ fsl,pins = <
+ MX8MP_IOMUXC_I2C1_SCL__I2C1_SCL 0x400001c2
+ MX8MP_IOMUXC_I2C1_SDA__I2C1_SDA 0x400001c2
+ >;
+ };
+
+ pinctrl_i2c1_gpio: i2c1gpiogrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_I2C1_SCL__GPIO5_IO14 0x1c2
+ MX8MP_IOMUXC_I2C1_SDA__GPIO5_IO15 0x1c2
+ >;
+ };
+
+ pinctrl_pmic: pmicgrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03 0x1c0
+ >;
+ };
+
+ pinctrl_sai3: sai3grp {
+ fsl,pins = <
+ MX8MP_IOMUXC_SAI3_TXFS__AUDIOMIX_SAI3_TX_SYNC 0xd6
+ MX8MP_IOMUXC_SAI3_TXC__AUDIOMIX_SAI3_TX_BCLK 0xd6
+ MX8MP_IOMUXC_SAI3_RXD__AUDIOMIX_SAI3_RX_DATA00 0xd6
+ MX8MP_IOMUXC_SAI3_TXD__AUDIOMIX_SAI3_TX_DATA00 0xd6
+ MX8MP_IOMUXC_SAI3_MCLK__AUDIOMIX_SAI3_MCLK 0xd6
+ MX8MP_IOMUXC_SAI3_RXFS__AUDIOMIX_SAI3_RX_SYNC 0xd6
+ MX8MP_IOMUXC_SAI3_RXC__AUDIOMIX_SAI3_RX_BCLK 0xd6
+ >;
+ };
+
+ pinctrl_uart4: uart4grp {
+ fsl,pins = <
+ MX8MP_IOMUXC_ECSPI2_SCLK__UART4_DCE_RX 0x140
+ MX8MP_IOMUXC_ECSPI2_MOSI__UART4_DCE_TX 0x140
+ MX8MP_IOMUXC_ECSPI2_MISO__UART4_DCE_CTS 0x140
+ MX8MP_IOMUXC_ECSPI2_SS0__UART4_DCE_RTS 0x140
+ >;
+ };
+
+ pinctrl_usdhc1: usdhc1grp {
+ fsl,pins = <
+ MX8MP_IOMUXC_SD1_CLK__USDHC1_CLK 0x190
+ MX8MP_IOMUXC_SD1_CMD__USDHC1_CMD 0x1d0
+ MX8MP_IOMUXC_SD1_DATA0__USDHC1_DATA0 0x1d0
+ MX8MP_IOMUXC_SD1_DATA1__USDHC1_DATA1 0x1d0
+ MX8MP_IOMUXC_SD1_DATA2__USDHC1_DATA2 0x1d0
+ MX8MP_IOMUXC_SD1_DATA3__USDHC1_DATA3 0x1d0
+ >;
+ };
+
+ pinctrl_usdhc1_100mhz: usdhc1-100mhzgrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_SD1_CLK__USDHC1_CLK 0x194
+ MX8MP_IOMUXC_SD1_CMD__USDHC1_CMD 0x1d4
+ MX8MP_IOMUXC_SD1_DATA0__USDHC1_DATA0 0x1d4
+ MX8MP_IOMUXC_SD1_DATA1__USDHC1_DATA1 0x1d4
+ MX8MP_IOMUXC_SD1_DATA2__USDHC1_DATA2 0x1d4
+ MX8MP_IOMUXC_SD1_DATA3__USDHC1_DATA3 0x1d4
+ >;
+ };
+
+ pinctrl_usdhc1_200mhz: usdhc1-200mhzgrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_SD1_CLK__USDHC1_CLK 0x196
+ MX8MP_IOMUXC_SD1_CMD__USDHC1_CMD 0x1d6
+ MX8MP_IOMUXC_SD1_DATA0__USDHC1_DATA0 0x1d6
+ MX8MP_IOMUXC_SD1_DATA1__USDHC1_DATA1 0x1d6
+ MX8MP_IOMUXC_SD1_DATA2__USDHC1_DATA2 0x1d6
+ MX8MP_IOMUXC_SD1_DATA3__USDHC1_DATA3 0x1d6
+ >;
+ };
+
+ pinctrl_usdhc3: usdhc3grp {
+ fsl,pins = <
+ MX8MP_IOMUXC_NAND_WE_B__USDHC3_CLK 0x190
+ MX8MP_IOMUXC_NAND_WP_B__USDHC3_CMD 0x1d0
+ MX8MP_IOMUXC_NAND_DATA04__USDHC3_DATA0 0x1d0
+ MX8MP_IOMUXC_NAND_DATA05__USDHC3_DATA1 0x1d0
+ MX8MP_IOMUXC_NAND_DATA06__USDHC3_DATA2 0x1d0
+ MX8MP_IOMUXC_NAND_DATA07__USDHC3_DATA3 0x1d0
+ MX8MP_IOMUXC_NAND_RE_B__USDHC3_DATA4 0x1d0
+ MX8MP_IOMUXC_NAND_CE2_B__USDHC3_DATA5 0x1d0
+ MX8MP_IOMUXC_NAND_CE3_B__USDHC3_DATA6 0x1d0
+ MX8MP_IOMUXC_NAND_CLE__USDHC3_DATA7 0x1d0
+ MX8MP_IOMUXC_NAND_CE1_B__USDHC3_STROBE 0x190
+ >;
+ };
+
+ pinctrl_usdhc3_100mhz: usdhc3-100mhzgrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_NAND_WE_B__USDHC3_CLK 0x194
+ MX8MP_IOMUXC_NAND_WP_B__USDHC3_CMD 0x1d4
+ MX8MP_IOMUXC_NAND_DATA04__USDHC3_DATA0 0x1d4
+ MX8MP_IOMUXC_NAND_DATA05__USDHC3_DATA1 0x1d4
+ MX8MP_IOMUXC_NAND_DATA06__USDHC3_DATA2 0x1d4
+ MX8MP_IOMUXC_NAND_DATA07__USDHC3_DATA3 0x1d4
+ MX8MP_IOMUXC_NAND_RE_B__USDHC3_DATA4 0x1d4
+ MX8MP_IOMUXC_NAND_CE2_B__USDHC3_DATA5 0x1d4
+ MX8MP_IOMUXC_NAND_CE3_B__USDHC3_DATA6 0x1d4
+ MX8MP_IOMUXC_NAND_CLE__USDHC3_DATA7 0x1d4
+ MX8MP_IOMUXC_NAND_CE1_B__USDHC3_STROBE 0x194
+ >;
+ };
+
+ pinctrl_usdhc3_200mhz: usdhc3-200mhzgrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_NAND_WE_B__USDHC3_CLK 0x196
+ MX8MP_IOMUXC_NAND_WP_B__USDHC3_CMD 0x1d6
+ MX8MP_IOMUXC_NAND_DATA04__USDHC3_DATA0 0x1d6
+ MX8MP_IOMUXC_NAND_DATA05__USDHC3_DATA1 0x1d6
+ MX8MP_IOMUXC_NAND_DATA06__USDHC3_DATA2 0x1d6
+ MX8MP_IOMUXC_NAND_DATA07__USDHC3_DATA3 0x1d6
+ MX8MP_IOMUXC_NAND_RE_B__USDHC3_DATA4 0x1d6
+ MX8MP_IOMUXC_NAND_CE2_B__USDHC3_DATA5 0x1d6
+ MX8MP_IOMUXC_NAND_CE3_B__USDHC3_DATA6 0x1d6
+ MX8MP_IOMUXC_NAND_CLE__USDHC3_DATA7 0x1d6
+ MX8MP_IOMUXC_NAND_CE1_B__USDHC3_STROBE 0x196
+ >;
+ };
+
+ pinctrl_wdog: wdoggrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_GPIO1_IO02__WDOG1_WDOG_B 0xc6
+ >;
+ };
+
+ pinctrl_wifi: wifigrp {
+ fsl,pins = <
+ MX8MP_IOMUXC_SD1_DATA5__GPIO2_IO07 0xc0
+ MX8MP_IOMUXC_SD1_DATA6__GPIO2_IO08 0xc0
+ >;
+ };
+};
--
2.47.3
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