[PATCH 14/14] imx: kontron-sl-mx8mm: Add support for Kontron Electronics SoM SL i.MX8MM OSM-S

[Frieder Schrempf <frieder@fris.de>]

From: Frieder Schrempf <frieder.schrempf@kontron.de>

This adds support for the Kontron Electronics SoM SL i.MX8MM OSM-S
and the matching baseboard BL i.MX8MM OSM-S.

The SoM hardware complies to the Open Standard Module (OSM) 1.0
specification, size S (https://sget.org/standards/osm).

The existing board configuration for the non-OSM SoM is reused and
allows to detect the SoM variant at runtime.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
---
 .../dts/imx8mm-kontron-n801x-s-u-boot.dtsi    | 138 +------
 .../dts/imx8mm-kontron-n802x-s-u-boot.dtsi    |   6 +
 arch/arm/dts/imx8mm-kontron-n802x-s.dts       | 376 ++++++++++++++++++
 arch/arm/dts/imx8mm-kontron-n802x-som.dtsi    | 309 ++++++++++++++
 .../dts/imx8mm-kontron-n80xx-s-u-boot.dtsi    | 139 +++++++
 board/kontron/sl-mx8mm/MAINTAINERS            |   1 +
 board/kontron/sl-mx8mm/sl-mx8mm.c             |   6 +-
 board/kontron/sl-mx8mm/spl.c                  |  22 +-
 configs/kontron-sl-mx8mm_defconfig            |   2 +
 doc/board/kontron/sl-mx8mm.rst                |   7 +-
 10 files changed, 866 insertions(+), 140 deletions(-)
 create mode 100644 arch/arm/dts/imx8mm-kontron-n802x-s-u-boot.dtsi
 create mode 100644 arch/arm/dts/imx8mm-kontron-n802x-s.dts
 create mode 100644 arch/arm/dts/imx8mm-kontron-n802x-som.dtsi
 create mode 100644 arch/arm/dts/imx8mm-kontron-n80xx-s-u-boot.dtsi

diff --git a/arch/arm/dts/imx8mm-kontron-n801x-s-u-boot.dtsi b/arch/arm/dts/imx8mm-kontron-n801x-s-u-boot.dtsi
index a42881d1a89..e2a5a883256 100644
--- a/arch/arm/dts/imx8mm-kontron-n801x-s-u-boot.dtsi
+++ b/arch/arm/dts/imx8mm-kontron-n801x-s-u-boot.dtsi
@@ -1,139 +1,7 @@
-// SPDX-License-Identifier: GPL-2.0+
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
 /*
- * Copyright (C) 2019 Kontron Electronics GmbH
+ * Copyright (C) 2022 Kontron Electronics GmbH
  */
 
-#include "imx8mm-u-boot.dtsi"
+#include "imx8mm-kontron-n80xx-s-u-boot.dtsi"
 
-/ {
-	aliases {
-		usb0 = &usbotg1;
-		usb1 = &usbotg2;
-	};
-
-	wdt-reboot {
-		compatible = "wdt-reboot";
-		wdt = <&wdog1>;
-		u-boot,dm-spl;
-	};
-
-	firmware {
-		optee {
-			compatible = "linaro,optee-tz";
-			method = "smc";
-		};
-	};
-};
-
-&crypto {
-	u-boot,dm-spl;
-};
-
-&sec_jr0 {
-	u-boot,dm-spl;
-};
-
-&sec_jr1 {
-	u-boot,dm-spl;
-};
-
-&sec_jr2 {
-	u-boot,dm-spl;
-};
-
-&i2c1 {
-	u-boot,dm-spl;
-	u-boot,dm-pre-reloc;
-};
-
-&i2c2 {
-	status = "okay";
-	u-boot,dm-spl;
-	u-boot,dm-pre-reloc;
-};
-
-&pinctrl_ecspi1 {
-	u-boot,dm-spl;
-};
-
-&pinctrl_i2c1 {
-	u-boot,dm-spl;
-};
-
-&pinctrl_pmic {
-	u-boot,dm-spl;
-};
-
-&pinctrl_uart3 {
-	u-boot,dm-spl;
-	u-boot,dm-pre-reloc;
-};
-
-&pinctrl_usdhc1 {
-	u-boot,dm-spl;
-};
-
-&pinctrl_usdhc1_100mhz {
-	u-boot,dm-spl;
-};
-
-&pinctrl_usdhc1_200mhz {
-	u-boot,dm-spl;
-};
-
-&pinctrl_usdhc2 {
-	u-boot,dm-spl;
-};
-
-&pca9450 {
-	u-boot,dm-spl;
-};
-
-&{/soc@0/bus@30800000/i2c@30a20000/pmic@25/regulators} {
-	u-boot,dm-spl;
-};
-
-&ecspi1 {
-	u-boot,dm-spl;
-};
-
-&gpio1 {
-	u-boot,dm-spl;
-};
-
-&gpio2 {
-	u-boot,dm-spl;
-};
-
-&gpio3 {
-	u-boot,dm-spl;
-};
-
-&gpio4 {
-	u-boot,dm-spl;
-};
-
-&gpio5 {
-	u-boot,dm-spl;
-};
-
-&uart3 {
-	u-boot,dm-spl;
-	u-boot,dm-pre-reloc;
-};
-
-&usdhc1 {
-	u-boot,dm-spl;
-};
-
-&usdhc2 {
-	u-boot,dm-spl;
-};
-
-&wdog1 {
-	u-boot,dm-spl;
-};
-
-&pinctrl_wdog {
-	u-boot,dm-spl;
-};
diff --git a/arch/arm/dts/imx8mm-kontron-n802x-s-u-boot.dtsi b/arch/arm/dts/imx8mm-kontron-n802x-s-u-boot.dtsi
new file mode 100644
index 00000000000..115c4a3d87c
--- /dev/null
+++ b/arch/arm/dts/imx8mm-kontron-n802x-s-u-boot.dtsi
@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright (C) 2022 Kontron Electronics GmbH
+ */
+
+#include "imx8mm-kontron-n80xx-s-u-boot.dtsi"
diff --git a/arch/arm/dts/imx8mm-kontron-n802x-s.dts b/arch/arm/dts/imx8mm-kontron-n802x-s.dts
new file mode 100644
index 00000000000..3d66506f748
--- /dev/null
+++ b/arch/arm/dts/imx8mm-kontron-n802x-s.dts
@@ -0,0 +1,376 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright (C) 2022 Kontron Electronics GmbH
+ */
+
+/dts-v1/;
+
+#include "imx8mm-kontron-n802x-som.dtsi"
+
+/ {
+	model = "Kontron BL i.MX8MM OSM-S (N802X)";
+	compatible = "kontron,imx8mm-n802x-s", "kontron,imx8mm-n802x-som", "fsl,imx8mm";
+
+	aliases {
+		ethernet1 = &usbnet;
+	};
+
+	/* fixed crystal dedicated to mcp2542fd */
+	osc_can: clock-osc-can {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <40000000>;
+		clock-output-names = "osc-can";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_gpio_led>;
+
+		led1 {
+			label = "led1";
+			gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "heartbeat";
+		};
+
+		led2 {
+			label = "led2";
+			gpios = <&gpio1 13 GPIO_ACTIVE_LOW>;
+		};
+
+		led3 {
+			label = "led3";
+			gpios = <&gpio1 14 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	pwm-beeper {
+		compatible = "pwm-beeper";
+		pwms = <&pwm2 0 5000 0>;
+	};
+
+	reg_rst_eth2: regulator-rst-eth2 {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_usb_eth2>;
+		gpio = <&gpio3 2 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-always-on;
+		regulator-name = "rst-usb-eth2";
+	};
+
+	reg_usb1_vbus: regulator-usb1-vbus {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_reg_usb1_vbus>;
+		gpio = <&gpio3 25 GPIO_ACTIVE_LOW>;
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-name = "usb1-vbus";
+	};
+
+	reg_vdd_5v: regulator-5v {
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-name = "vdd-5v";
+	};
+};
+
+&ecspi2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_ecspi2>;
+	cs-gpios = <&gpio5 13 GPIO_ACTIVE_LOW>;
+	status = "okay";
+
+	can@0 {
+		compatible = "microchip,mcp251xfd";
+		reg = <0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_can>;
+		clocks = <&osc_can>;
+		interrupts-extended = <&gpio4 28 IRQ_TYPE_LEVEL_LOW>;
+		/*
+		 * Limit the SPI clock to 15 MHz to prevent issues
+		 * with corrupted data due to chip errata.
+		 */
+		spi-max-frequency = <15000000>;
+		vdd-supply = <&reg_vdd_3v3>;
+		xceiver-supply = <&reg_vdd_5v>;
+	};
+};
+
+&ecspi3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_ecspi3>;
+	cs-gpios = <&gpio5 25 GPIO_ACTIVE_LOW>;
+	status = "okay";
+
+	eeram@0 {
+		compatible = "microchip,48l640";
+		reg = <0>;
+		spi-max-frequency = <20000000>;
+	};
+};
+
+&fec1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_enet>;
+	phy-connection-type = "rgmii-rxid";
+	phy-handle = <&ethphy>;
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ethphy: ethernet-phy@0 {
+			reg = <0>;
+			reset-assert-us = <1>;
+			reset-deassert-us = <15000>;
+			reset-gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
+		};
+	};
+};
+
+&gpio1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gpio1>;
+	gpio-line-names = "", "", "", "dio1-out", "", "", "dio1-in", "dio2-out",
+			  "dio2-in", "dio3-out", "dio3-in", "dio4-out", "", "", "", "",
+			  "", "", "", "", "", "", "", "",
+			  "", "", "", "", "", "", "", "";
+};
+
+&gpio5 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gpio5>;
+	gpio-line-names = "", "", "dio4-in", "", "", "", "", "",
+			  "", "", "", "", "", "", "", "",
+			  "", "", "", "", "", "", "", "",
+			  "", "", "", "", "", "", "", "";
+};
+
+&i2c4 {
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c4>;
+	status = "okay";
+};
+
+&pwm2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_pwm2>;
+	status = "okay";
+};
+
+&uart1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart1>;
+	uart-has-rtscts;
+	status = "okay";
+};
+
+&uart2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart2>;
+	linux,rs485-enabled-at-boot-time;
+	uart-has-rtscts;
+	status = "okay";
+};
+
+&usbotg1 {
+	dr_mode = "otg";
+	disable-over-current;
+	vbus-supply = <&reg_usb1_vbus>;
+	status = "okay";
+};
+
+&usbotg2 {
+	dr_mode = "host";
+	disable-over-current;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	status = "okay";
+
+	usb1@1 {
+		compatible = "usb424,9514";
+		reg = <1>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		usbnet: ethernet@1 {
+			compatible = "usb424,ec00";
+			reg = <1>;
+			local-mac-address = [ 00 00 00 00 00 00 ];
+		};
+	};
+};
+
+&usdhc2 {
+	pinctrl-names = "default", "state_100mhz", "state_200mhz";
+	pinctrl-0 = <&pinctrl_usdhc2>;
+	pinctrl-1 = <&pinctrl_usdhc2_100mhz>;
+	pinctrl-2 = <&pinctrl_usdhc2_200mhz>;
+	vmmc-supply = <&reg_vdd_3v3>;
+	vqmmc-supply = <&reg_nvcc_sd>;
+	cd-gpios = <&gpio2 12 GPIO_ACTIVE_LOW>;
+	status = "okay";
+};
+
+&iomuxc {
+	pinctrl_can: cangrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI3_RXFS_GPIO4_IO28		0x19
+		>;
+	};
+
+	pinctrl_ecspi2: ecspi2grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_ECSPI2_MISO_ECSPI2_MISO		0x82
+			MX8MM_IOMUXC_ECSPI2_MOSI_ECSPI2_MOSI		0x82
+			MX8MM_IOMUXC_ECSPI2_SCLK_ECSPI2_SCLK		0x82
+			MX8MM_IOMUXC_ECSPI2_SS0_GPIO5_IO13		0x19
+		>;
+	};
+
+	pinctrl_ecspi3: ecspi3grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_UART2_RXD_ECSPI3_MISO		0x82
+			MX8MM_IOMUXC_UART1_TXD_ECSPI3_MOSI		0x82
+			MX8MM_IOMUXC_UART1_RXD_ECSPI3_SCLK		0x82
+			MX8MM_IOMUXC_UART2_TXD_GPIO5_IO25		0x19
+		>;
+	};
+
+	pinctrl_enet: enetgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_ENET_MDC_ENET1_MDC			0x3
+			MX8MM_IOMUXC_ENET_MDIO_ENET1_MDIO		0x3
+			MX8MM_IOMUXC_ENET_TD3_ENET1_RGMII_TD3		0x1f
+			MX8MM_IOMUXC_ENET_TD2_ENET1_RGMII_TD2		0x1f
+			MX8MM_IOMUXC_ENET_TD1_ENET1_RGMII_TD1		0x1f
+			MX8MM_IOMUXC_ENET_TD0_ENET1_RGMII_TD0		0x1f
+			MX8MM_IOMUXC_ENET_RD3_ENET1_RGMII_RD3		0x91
+			MX8MM_IOMUXC_ENET_RD2_ENET1_RGMII_RD2		0x91
+			MX8MM_IOMUXC_ENET_RD1_ENET1_RGMII_RD1		0x91
+			MX8MM_IOMUXC_ENET_RD0_ENET1_RGMII_RD0		0x91
+			MX8MM_IOMUXC_ENET_TXC_ENET1_RGMII_TXC		0x1f
+			MX8MM_IOMUXC_ENET_RXC_ENET1_RGMII_RXC		0x91
+			MX8MM_IOMUXC_ENET_RX_CTL_ENET1_RGMII_RX_CTL	0x91
+			MX8MM_IOMUXC_ENET_TX_CTL_ENET1_RGMII_TX_CTL	0x1f
+			MX8MM_IOMUXC_GPIO1_IO01_GPIO1_IO1		0x19 /* PHY RST */
+			MX8MM_IOMUXC_GPIO1_IO05_GPIO1_IO5		0x19 /* ETH IRQ */
+		>;
+	};
+
+	pinctrl_gpio_led: gpioledgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_GPIO1_IO12_GPIO1_IO12		0x19
+			MX8MM_IOMUXC_GPIO1_IO13_GPIO1_IO13		0x19
+			MX8MM_IOMUXC_GPIO1_IO14_GPIO1_IO14		0x19
+		>;
+	};
+
+	pinctrl_gpio1: gpio1grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_GPIO1_IO03_GPIO1_IO3		0x19
+			MX8MM_IOMUXC_GPIO1_IO07_GPIO1_IO7		0x19
+			MX8MM_IOMUXC_GPIO1_IO09_GPIO1_IO9		0x19
+			MX8MM_IOMUXC_GPIO1_IO11_GPIO1_IO11		0x19
+			MX8MM_IOMUXC_GPIO1_IO06_GPIO1_IO6		0x19
+			MX8MM_IOMUXC_GPIO1_IO08_GPIO1_IO8		0x19
+			MX8MM_IOMUXC_GPIO1_IO10_GPIO1_IO10		0x19
+		>;
+	};
+
+	pinctrl_gpio5: gpio5grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI3_MCLK_GPIO5_IO2		0x19
+		>;
+	};
+
+	pinctrl_i2c4: i2c4grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_I2C4_SCL_I2C4_SCL			0x400001c3
+			MX8MM_IOMUXC_I2C4_SDA_I2C4_SDA			0x400001c3
+		>;
+	};
+
+	pinctrl_pwm2: pwm2grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SPDIF_RX_PWM2_OUT			0x19
+		>;
+	};
+
+	pinctrl_reg_usb1_vbus: regusb1vbusgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI5_MCLK_GPIO3_IO25		0x19
+		>;
+	};
+
+	pinctrl_uart1: uart1grp {
+		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_uart2: uart2grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI3_TXFS_UART2_DCE_RX		0x140
+			MX8MM_IOMUXC_SAI3_TXC_UART2_DCE_TX		0x140
+			MX8MM_IOMUXC_SAI3_RXD_UART2_DCE_RTS_B		0x140
+			MX8MM_IOMUXC_SAI3_RXC_UART2_DCE_CTS_B		0x140
+		>;
+	};
+
+	pinctrl_usb_eth2: usbeth2grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_NAND_CE1_B_GPIO3_IO2		0x19
+		>;
+	};
+
+	pinctrl_usdhc2: usdhc2grp {
+		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		0x019
+			MX8MM_IOMUXC_GPIO1_IO04_USDHC2_VSELECT		0x1d0
+		>;
+	};
+
+	pinctrl_usdhc2_100mhz: usdhc2-100mhzgrp {
+		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		0x019
+			MX8MM_IOMUXC_GPIO1_IO04_USDHC2_VSELECT		0x1d0
+		>;
+	};
+
+	pinctrl_usdhc2_200mhz: usdhc2-200mhzgrp {
+		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		0x019
+			MX8MM_IOMUXC_GPIO1_IO04_USDHC2_VSELECT		0x1d0
+		>;
+	};
+};
diff --git a/arch/arm/dts/imx8mm-kontron-n802x-som.dtsi b/arch/arm/dts/imx8mm-kontron-n802x-som.dtsi
new file mode 100644
index 00000000000..25ac46585fd
--- /dev/null
+++ b/arch/arm/dts/imx8mm-kontron-n802x-som.dtsi
@@ -0,0 +1,309 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright (C) 2022 Kontron Electronics GmbH
+ */
+
+#include <dt-bindings/interrupt-controller/irq.h>
+#include "imx8mm.dtsi"
+
+/ {
+	model = "Kontron SL i.MX8MM OSM-S (N802X)";
+	compatible = "kontron,imx8mm-n802x-som", "fsl,imx8mm";
+
+	memory@40000000 {
+		device_type = "memory";
+		/*
+		 * There are multiple SoM flavors with different DDR sizes.
+		 * The smallest is 1GB. For larger sizes the bootloader will
+		 * update the reg property.
+		 */
+		reg = <0x0 0x40000000 0 0x80000000>;
+	};
+
+	chosen {
+		stdout-path = &uart3;
+	};
+};
+
+&A53_0 {
+	cpu-supply = <&reg_vdd_arm>;
+};
+
+&A53_1 {
+	cpu-supply = <&reg_vdd_arm>;
+};
+
+&A53_2 {
+	cpu-supply = <&reg_vdd_arm>;
+};
+
+&A53_3 {
+	cpu-supply = <&reg_vdd_arm>;
+};
+
+&ddrc {
+	operating-points-v2 = <&ddrc_opp_table>;
+
+	ddrc_opp_table: opp-table {
+		compatible = "operating-points-v2";
+
+		opp-100M {
+			opp-hz = /bits/ 64 <100000000>;
+		};
+
+		opp-750M {
+			opp-hz = /bits/ 64 <750000000>;
+		};
+	};
+};
+
+&ecspi1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_ecspi1>;
+	cs-gpios = <&gpio5 9 GPIO_ACTIVE_LOW>;
+	status = "okay";
+
+	flash@0 {
+		compatible = "mxicy,mx25r1635f", "jedec,spi-nor";
+		spi-max-frequency = <80000000>;
+		reg = <0>;
+	};
+};
+
+&i2c1 {
+	clock-frequency = <400000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c1>;
+	status = "okay";
+
+	pca9450: pmic@25 {
+		compatible = "nxp,pca9450a";
+		reg = <0x25>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_pmic>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+
+		regulators {
+			reg_vdd_soc: BUCK1 {
+				regulator-name = "+0V8_VDD_SOC (BUCK1)";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <850000>;
+				regulator-boot-on;
+				regulator-always-on;
+				regulator-ramp-delay = <3125>;
+				nxp,dvs-run-voltage = <850000>;
+				nxp,dvs-standby-voltage = <800000>;
+			};
+
+			reg_vdd_arm: BUCK2 {
+				regulator-name = "+0V9_VDD_ARM (BUCK2)";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <950000>;
+				regulator-boot-on;
+				regulator-always-on;
+				regulator-ramp-delay = <3125>;
+				nxp,dvs-run-voltage = <950000>;
+				nxp,dvs-standby-voltage = <850000>;
+			};
+
+			reg_vdd_dram: BUCK3 {
+				regulator-name = "+0V9_VDD_DRAM&PU (BUCK3)";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <950000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			reg_vdd_3v3: BUCK4 {
+				regulator-name = "+3V3 (BUCK4)";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			reg_vdd_1v8: BUCK5 {
+				regulator-name = "+1V8 (BUCK5)";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			reg_nvcc_dram: BUCK6 {
+				regulator-name = "+1V1_NVCC_DRAM (BUCK6)";
+				regulator-min-microvolt = <1100000>;
+				regulator-max-microvolt = <1100000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			reg_nvcc_snvs: LDO1 {
+				regulator-name = "+1V8_NVCC_SNVS (LDO1)";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			reg_vdd_snvs: LDO2 {
+				regulator-name = "+0V8_VDD_SNVS (LDO2)";
+				regulator-min-microvolt = <800000>;
+				regulator-max-microvolt = <900000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			reg_vdda: LDO3 {
+				regulator-name = "+1V8_VDDA (LDO3)";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			reg_vdd_phy: LDO4 {
+				regulator-name = "+0V9_VDD_PHY (LDO4)";
+				regulator-min-microvolt = <900000>;
+				regulator-max-microvolt = <900000>;
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			reg_nvcc_sd: LDO5 {
+				regulator-name = "NVCC_SD (LDO5)";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <3300000>;
+			};
+		};
+	};
+
+	rtc@52 {
+		compatible = "microcrystal,rv3028";
+		reg = <0x52>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_rtc>;
+		interrupts-extended = <&gpio4 1 IRQ_TYPE_LEVEL_HIGH>;
+		trickle-diode-disable;
+	};
+};
+
+&uart3 { /* console */
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_uart3>;
+	status = "okay";
+};
+
+&usdhc1 {
+	pinctrl-names = "default", "state_100mhz", "state_200mhz";
+	pinctrl-0 = <&pinctrl_usdhc1>;
+	pinctrl-1 = <&pinctrl_usdhc1_100mhz>;
+	pinctrl-2 = <&pinctrl_usdhc1_200mhz>;
+	vmmc-supply = <&reg_vdd_3v3>;
+	vqmmc-supply = <&reg_vdd_1v8>;
+	bus-width = <8>;
+	non-removable;
+	status = "okay";
+};
+
+&wdog1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_wdog>;
+	fsl,ext-reset-output;
+	status = "okay";
+};
+
+&iomuxc {
+	pinctrl_ecspi1: ecspi1grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_ECSPI1_MISO_ECSPI1_MISO		0x82
+			MX8MM_IOMUXC_ECSPI1_MOSI_ECSPI1_MOSI		0x82
+			MX8MM_IOMUXC_ECSPI1_SCLK_ECSPI1_SCLK		0x82
+			MX8MM_IOMUXC_ECSPI1_SS0_GPIO5_IO9		0x19
+		>;
+	};
+
+	pinctrl_i2c1: i2c1grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_I2C1_SCL_I2C1_SCL			0x400001c3
+			MX8MM_IOMUXC_I2C1_SDA_I2C1_SDA			0x400001c3
+		>;
+	};
+
+	pinctrl_pmic: pmicgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_GPIO1_IO00_GPIO1_IO0		0x141
+		>;
+	};
+
+	pinctrl_rtc: rtcgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SAI1_RXC_GPIO4_IO1			0x19
+		>;
+	};
+
+	pinctrl_uart3: uart3grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_UART3_RXD_UART3_DCE_RX		0x140
+			MX8MM_IOMUXC_UART3_TXD_UART3_DCE_TX		0x140
+		>;
+	};
+
+	pinctrl_usdhc1: usdhc1grp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SD1_CLK_USDHC1_CLK			0x190
+			MX8MM_IOMUXC_SD1_CMD_USDHC1_CMD			0x1d0
+			MX8MM_IOMUXC_SD1_DATA0_USDHC1_DATA0		0x1d0
+			MX8MM_IOMUXC_SD1_DATA1_USDHC1_DATA1		0x1d0
+			MX8MM_IOMUXC_SD1_DATA2_USDHC1_DATA2		0x1d0
+			MX8MM_IOMUXC_SD1_DATA3_USDHC1_DATA3		0x1d0
+			MX8MM_IOMUXC_SD1_DATA4_USDHC1_DATA4		0x1d0
+			MX8MM_IOMUXC_SD1_DATA5_USDHC1_DATA5		0x1d0
+			MX8MM_IOMUXC_SD1_DATA6_USDHC1_DATA6		0x1d0
+			MX8MM_IOMUXC_SD1_DATA7_USDHC1_DATA7		0x1d0
+			MX8MM_IOMUXC_SD1_RESET_B_USDHC1_RESET_B		0x019
+			MX8MM_IOMUXC_SD1_STROBE_USDHC1_STROBE		0x190
+		>;
+	};
+
+	pinctrl_usdhc1_100mhz: usdhc1-100mhzgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SD1_CLK_USDHC1_CLK			0x194
+			MX8MM_IOMUXC_SD1_CMD_USDHC1_CMD			0x1d4
+			MX8MM_IOMUXC_SD1_DATA0_USDHC1_DATA0		0x1d4
+			MX8MM_IOMUXC_SD1_DATA1_USDHC1_DATA1		0x1d4
+			MX8MM_IOMUXC_SD1_DATA2_USDHC1_DATA2		0x1d4
+			MX8MM_IOMUXC_SD1_DATA3_USDHC1_DATA3		0x1d4
+			MX8MM_IOMUXC_SD1_DATA4_USDHC1_DATA4		0x1d4
+			MX8MM_IOMUXC_SD1_DATA5_USDHC1_DATA5		0x1d4
+			MX8MM_IOMUXC_SD1_DATA6_USDHC1_DATA6		0x1d4
+			MX8MM_IOMUXC_SD1_DATA7_USDHC1_DATA7		0x1d4
+			MX8MM_IOMUXC_SD1_RESET_B_USDHC1_RESET_B		0x019
+			MX8MM_IOMUXC_SD1_STROBE_USDHC1_STROBE		0x194
+		>;
+	};
+
+	pinctrl_usdhc1_200mhz: usdhc1-200mhzgrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_SD1_CLK_USDHC1_CLK			0x196
+			MX8MM_IOMUXC_SD1_CMD_USDHC1_CMD			0x1d6
+			MX8MM_IOMUXC_SD1_DATA0_USDHC1_DATA0		0x1d6
+			MX8MM_IOMUXC_SD1_DATA1_USDHC1_DATA1		0x1d6
+			MX8MM_IOMUXC_SD1_DATA2_USDHC1_DATA2		0x1d6
+			MX8MM_IOMUXC_SD1_DATA3_USDHC1_DATA3		0x1d6
+			MX8MM_IOMUXC_SD1_DATA4_USDHC1_DATA4		0x1d6
+			MX8MM_IOMUXC_SD1_DATA5_USDHC1_DATA5		0x1d6
+			MX8MM_IOMUXC_SD1_DATA6_USDHC1_DATA6		0x1d6
+			MX8MM_IOMUXC_SD1_DATA7_USDHC1_DATA7		0x1d6
+			MX8MM_IOMUXC_SD1_RESET_B_USDHC1_RESET_B		0x019
+			MX8MM_IOMUXC_SD1_STROBE_USDHC1_STROBE		0x196
+		>;
+	};
+
+	pinctrl_wdog: wdoggrp {
+		fsl,pins = <
+			MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B		0xc6
+		>;
+	};
+};
diff --git a/arch/arm/dts/imx8mm-kontron-n80xx-s-u-boot.dtsi b/arch/arm/dts/imx8mm-kontron-n80xx-s-u-boot.dtsi
new file mode 100644
index 00000000000..e7e900d4fa8
--- /dev/null
+++ b/arch/arm/dts/imx8mm-kontron-n80xx-s-u-boot.dtsi
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright (C) 2019 Kontron Electronics GmbH
+ */
+
+#include "imx8mm-u-boot.dtsi"
+
+/ {
+	aliases {
+		usb0 = &usbotg1;
+		usb1 = &usbotg2;
+	};
+
+	wdt-reboot {
+		compatible = "wdt-reboot";
+		wdt = <&wdog1>;
+		u-boot,dm-spl;
+	};
+
+	firmware {
+		optee {
+			compatible = "linaro,optee-tz";
+			method = "smc";
+		};
+	};
+};
+
+&crypto {
+	u-boot,dm-spl;
+};
+
+&sec_jr0 {
+	u-boot,dm-spl;
+};
+
+&sec_jr1 {
+	u-boot,dm-spl;
+};
+
+&sec_jr2 {
+	u-boot,dm-spl;
+};
+
+&i2c1 {
+	u-boot,dm-spl;
+	u-boot,dm-pre-reloc;
+};
+
+&i2c2 {
+	status = "okay";
+	u-boot,dm-spl;
+	u-boot,dm-pre-reloc;
+};
+
+&pinctrl_ecspi1 {
+	u-boot,dm-spl;
+};
+
+&pinctrl_i2c1 {
+	u-boot,dm-spl;
+};
+
+&pinctrl_pmic {
+	u-boot,dm-spl;
+};
+
+&pinctrl_uart3 {
+	u-boot,dm-spl;
+	u-boot,dm-pre-reloc;
+};
+
+&pinctrl_usdhc1 {
+	u-boot,dm-spl;
+};
+
+&pinctrl_usdhc1_100mhz {
+	u-boot,dm-spl;
+};
+
+&pinctrl_usdhc1_200mhz {
+	u-boot,dm-spl;
+};
+
+&pinctrl_usdhc2 {
+	u-boot,dm-spl;
+};
+
+&pca9450 {
+	u-boot,dm-spl;
+};
+
+&{/soc@0/bus@30800000/i2c@30a20000/pmic@25/regulators} {
+	u-boot,dm-spl;
+};
+
+&ecspi1 {
+	u-boot,dm-spl;
+};
+
+&gpio1 {
+	u-boot,dm-spl;
+};
+
+&gpio2 {
+	u-boot,dm-spl;
+};
+
+&gpio3 {
+	u-boot,dm-spl;
+};
+
+&gpio4 {
+	u-boot,dm-spl;
+};
+
+&gpio5 {
+	u-boot,dm-spl;
+};
+
+&uart3 {
+	u-boot,dm-spl;
+	u-boot,dm-pre-reloc;
+};
+
+&usdhc1 {
+	u-boot,dm-spl;
+};
+
+&usdhc2 {
+	u-boot,dm-spl;
+};
+
+&wdog1 {
+	u-boot,dm-spl;
+};
+
+&pinctrl_wdog {
+	u-boot,dm-spl;
+};
diff --git a/board/kontron/sl-mx8mm/MAINTAINERS b/board/kontron/sl-mx8mm/MAINTAINERS
index 5e68ae0305a..df60cc2444f 100644
--- a/board/kontron/sl-mx8mm/MAINTAINERS
+++ b/board/kontron/sl-mx8mm/MAINTAINERS
@@ -2,6 +2,7 @@ Kontron SL/BL i.MX8M Mini Boards (N801x)
 M:	Frieder Schrempf <frieder.schrempf@kontron.de>
 S:	Maintained
 F:	arch/arm/dts/imx8mm-kontron-n801x-*
+F:	arch/arm/dts/imx8mm-kontron-n802x-*
 F:	board/kontron/sl-mx8mm
 F:	configs/kontron-sl-mx8mm_defconfig
 F:	doc/board/kontron/sl-mx8mm.rst
diff --git a/board/kontron/sl-mx8mm/sl-mx8mm.c b/board/kontron/sl-mx8mm/sl-mx8mm.c
index 9cbae6add16..c576c58adc0 100644
--- a/board/kontron/sl-mx8mm/sl-mx8mm.c
+++ b/board/kontron/sl-mx8mm/sl-mx8mm.c
@@ -123,7 +123,11 @@ int board_init(void)
 
 int board_late_init(void)
 {
-	env_set("som_type", "n801x");
+	if (!fdt_node_check_compatible(gd->fdt_blob, 0, "kontron,imx8mm-n802x-som"))
+		env_set("som_type", "n802x");
+	else
+		env_set("som_type", "n801x");
+
 	return 0;
 }
 
diff --git a/board/kontron/sl-mx8mm/spl.c b/board/kontron/sl-mx8mm/spl.c
index 28211ae78f3..8082ad390f8 100644
--- a/board/kontron/sl-mx8mm/spl.c
+++ b/board/kontron/sl-mx8mm/spl.c
@@ -29,6 +29,7 @@ DECLARE_GLOBAL_DATA_PTR;
 
 enum {
 	BOARD_TYPE_KTN_N801X,
+	BOARD_TYPE_KTN_N802X,
 	BOARD_TYPE_MAX
 };
 
@@ -115,8 +116,21 @@ static void spl_dram_init(void)
 
 int do_board_detect(void)
 {
-	gd->board_type = BOARD_TYPE_KTN_N801X;
-	printf("Kontron SL i.MX8MM (N801X) module, %u GB RAM detected\n", gd->ram_size);
+	struct udevice *udev;
+
+	/*
+	 * Check for the RTC on the OSM module.
+	 */
+	imx_iomux_v3_setup_multiple_pads(i2c1_pads, ARRAY_SIZE(i2c1_pads));
+
+	if (i2c_get_chip_for_busnum(0, 0x52, 0, &udev) == 0) {
+		gd->board_type = BOARD_TYPE_KTN_N802X;
+		printf("Kontron SL i.MX8MM OSM-S (N802X) module, %u GB RAM detected\n",
+		       gd->ram_size);
+	} else {
+		gd->board_type = BOARD_TYPE_KTN_N801X;
+		printf("Kontron SL i.MX8MM (N801X) module, %u GB RAM detected\n", gd->ram_size);
+	}
 
 	/*
 	 * Check the I2C PMIC to detect the deprecated SoM with DA9063.
@@ -138,6 +152,10 @@ int board_fit_config_name_match(const char *name)
 	    !strncmp(name, "imx8mm-kontron-n801x-s", 22))
 		return 0;
 
+	if (gd->board_type == BOARD_TYPE_KTN_N802X && is_imx8mm() &&
+	    !strncmp(name, "imx8mm-kontron-n802x-s", 22))
+		return 0;
+
 	return -1;
 }
 
diff --git a/configs/kontron-sl-mx8mm_defconfig b/configs/kontron-sl-mx8mm_defconfig
index d9cacb2d809..5a480805133 100644
--- a/configs/kontron-sl-mx8mm_defconfig
+++ b/configs/kontron-sl-mx8mm_defconfig
@@ -70,6 +70,7 @@ CONFIG_CMD_EXT4_WRITE=y
 CONFIG_MTDPARTS_DEFAULT="mtdparts=spi0.0:320k(spl),1024k(u-boot),64k(env),64k(env_redundant)"
 CONFIG_OF_CONTROL=y
 CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_LIST="imx8mm-kontron-n801x-s imx8mm-kontron-n802x-s"
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
@@ -118,6 +119,7 @@ CONFIG_SPL_DM_PMIC_PCA9450=y
 CONFIG_DM_REGULATOR=y
 CONFIG_DM_REGULATOR_PCA9450=y
 CONFIG_DM_RTC=y
+CONFIG_RTC_RV3028=y
 CONFIG_RTC_RV8803=y
 CONFIG_DM_SERIAL=y
 CONFIG_MXC_UART=y
diff --git a/doc/board/kontron/sl-mx8mm.rst b/doc/board/kontron/sl-mx8mm.rst
index 7a4c1134b54..dbe7bf067b4 100644
--- a/doc/board/kontron/sl-mx8mm.rst
+++ b/doc/board/kontron/sl-mx8mm.rst
@@ -3,12 +3,15 @@
 Kontron Electronics SL i.MX8MM SoM
 ==================================
 
-The Kontron SoM-Line i.MX8MM (N801x) by Kontron Electronics GmbH is a SoM module
-with an i.MX8M-Mini SoC, 1/2/4 GB LPDDR4 RAM, SPI NOR, eMMC and PMIC.
+The Kontron SoM-Line i.MX8MM (N801x, N802x) by Kontron Electronics GmbH is a SoM
+module with an i.MX8M-Mini SoC, 1/2/4 GB LPDDR4 RAM, SPI NOR, eMMC and PMIC.
 
 The matching evaluation boards (Board-Line) have two Ethernet ports, USB 2.0,
 HDMI/LVDS, SD card, CAN, RS485, RS232 and much more.
 
+The SL i.MX8MM OSM-S (N802x) is compliant to the Open Standard Module (OSM) 1.0
+specification, size S (https://sget.org/standards/osm).
+
 Quick Start
 -----------
 
-- 
2.37.0