imx: Add support for Kontron i.MX93 OSM-S SoM and BL carrier board

This adds support for the Kontron Electronics OSM-S i.MX93 SoM
and the matching baseboard BL i.MX93.

The SoM hardware complies to the Open Standard Module (OSM) 1.1
specification, size S (https://sget.org/standards/osm).

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>

arch/arm/dts/imx93-kontron-bl-osm-s-u-boot.dtsi

@@ -0,0 +1,153 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright (C) 2024 Kontron Electronics GmbH
+ */
+
+#include "imx93-u-boot.dtsi"
+
+/ {
+	wdt-reboot {
+		compatible = "wdt-reboot";
+		wdt = <&wdog3>;
+		bootph-all;
+	};
+
+	firmware {
+		optee {
+			compatible = "linaro,optee-tz";
+			method = "smc";
+		};
+	};
+};
+
+&A55_0 {
+	clocks = <&clk IMX93_CLK_ARM_PLL>;
+};
+
+&A55_1 {
+	clocks = <&clk IMX93_CLK_ARM_PLL>;
+};
+
+&{/soc@0} {
+	bootph-all;
+};
+
+&reg_vdd_carrier {
+	bootph-all;
+};
+
+&pinctrl_reg_vdd_carrier {
+	bootph-all;
+};
+
+&aips1 {
+	bootph-all;
+};
+
+&aips2 {
+	bootph-all;
+};
+
+&aips3 {
+	bootph-all;
+};
+
+&iomuxc {
+	bootph-all;
+};
+
+&pinctrl_usdhc2_gpio {
+	bootph-all;
+};
+
+&pinctrl_usdhc2 {
+	bootph-all;
+};
+
+&gpio1 {
+	bootph-all;
+};
+
+&gpio2 {
+	bootph-all;
+};
+
+&gpio3 {
+	bootph-all;
+};
+
+&gpio4 {
+	bootph-all;
+};
+
+&lpuart1 {
+	bootph-all;
+};
+
+&pinctrl_lpuart1 {
+	bootph-all;
+};
+
+&usdhc1 {
+	bootph-all;
+};
+
+&usdhc2 {
+	bootph-all;
+	fsl,signal-voltage-switch-extra-delay-ms = <8>;
+};
+
+&lpi2c1 {
+	bootph-all;
+};
+
+/* Enable I2C2 to probe for a touch controller on LVDS connector */
+&lpi2c2 {
+	bootph-all;
+	status = "okay";
+};
+
+&pca9451 {
+	bootph-all;
+};
+
+&{/soc@0/bus@44000000/i2c@44340000/pmic@25/regulators} {
+	bootph-all;
+};
+
+&pinctrl_lpi2c1 {
+	bootph-all;
+};
+
+&s4muap {
+	bootph-all;
+	status = "okay";
+};
+
+&clk {
+	bootph-all;
+};
+
+&osc_32k {
+	bootph-all;
+};
+
+&osc_24m {
+	bootph-all;
+};
+
+&clk_ext1 {
+	bootph-all;
+};
+
+&wdog3 {
+	bootph-all;
+};
+
+&reg_vdd_3v3 {
+	bootph-all;
+};
+
+&reg_nvcc_sd {
+	bootph-all;
+};

arch/arm/mach-imx/imx9/Kconfig

@@ -103,6 +103,15 @@ config TARGET_IMX93_VAR_SOM
 	select IMX93
 	select IMX9_LPDDR4X
 
+config TARGET_KONTRON_MX93
+	bool "Kontron OSM-S/BL i.MX93"
+	select BINMAN
+	select IMX93
+	select IMX9_LPDDR4X
+	help
+	  Kontron Electronics BL i.MX93 using SoM module conformant to OSM
+	  standard 1.1 size S.
+
 config TARGET_PHYCORE_IMX93
 	bool "phycore_imx93"
 	select IMX93
@@ -142,6 +151,7 @@ source "board/freescale/imx91_evk/Kconfig"
 source "board/freescale/imx93_evk/Kconfig"
 source "board/freescale/imx93_frdm/Kconfig"
 source "board/freescale/imx93_qsb/Kconfig"
+source "board/kontron/osm-s-mx93/Kconfig"
 source "board/phytec/phycore_imx93/Kconfig"
 source "board/variscite/imx93_var_som/Kconfig"
 source "board/freescale/imx94_evk/Kconfig"
@@ -149,4 +159,3 @@ source "board/freescale/imx95_evk/Kconfig"
 source "board/toradex/smarc-imx95/Kconfig"
 
 endif
-

board/kontron/osm-s-mx93/Kconfig

@@ -0,0 +1,17 @@
+if TARGET_KONTRON_MX93
+
+config SYS_BOARD
+	string
+	default "osm-s-mx93"
+
+config SYS_VENDOR
+	string
+	default "kontron"
+
+config SYS_CONFIG_NAME
+	string
+	default "kontron-osm-s-mx93"
+
+source "board/kontron/common/Kconfig"
+
+endif

board/kontron/osm-s-mx93/MAINTAINERS

@@ -0,0 +1,7 @@
+Kontron OSM-S/BL i.MX93 Boards
+M:	Frieder Schrempf <frieder.schrempf@kontron.de>
+S:	Maintained
+F:	board/kontron/osm-s-mx93
+F:	configs/kontron-osm-s-mx93_defconfig
+F:	doc/board/kontron/osm-s-mx93.rst
+F:	include/configs/kontron-osm-s-mx93.h

board/kontron/osm-s-mx93/Makefile

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0+
+# (C) Copyright 2023 Kontron Electronics GmbH
+
+obj-y := osm-s-mx93.o
+
+ifdef CONFIG_SPL_BUILD
+obj-y += spl.o
+obj-y += lpddr4x_timing.o
+endif

board/kontron/osm-s-mx93/osm-s-mx93.c

@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Kontron Electronics GmbH
+ */
+
+#include <asm/arch/clock.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/global_data.h>
+#include <asm/io.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <dm/uclass.h>
+#include <efi.h>
+#include <efi_loader.h>
+#include <env_internal.h>
+#include <fdt_support.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <mmc.h>
+#include <net.h>
+#include <asm/arch-imx9/imx93_pins.h>
+#include <asm/arch/ccm_regs.h>
+
+#include "../common/hw-uid.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int board_early_init_f(void)
+{
+	return 0;
+}
+
+#if IS_ENABLED(CONFIG_KONTRON_HW_UID)
+struct uid_otp_loc uid_otp_locations[] = {
+	{
+		.addr = (u32 *)(FSB_BASE_ADDR + 0x8000 + 0x5e8),
+		.len = 2,
+		.format = UID_OTP_FORMAT_DEC,
+		.desc = "BOARD"
+	},
+	{
+		.addr = (u32 *)(FSB_BASE_ADDR + 0x8000 + 0x5e0),
+		.len = 2,
+		.format = UID_OTP_FORMAT_DEC,
+		.desc = "SOM"
+	}
+};
+#endif /* CONFIG_KONTRON_HW_UID */
+
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+	enum boot_device boot_dev;
+	char env_str_sd[] = "sd-card";
+	char env_str_emmc[] = "emmc";
+	char *env_config_str;
+
+	if (env_get_location(0, 0) != ENVL_MMC)
+		return 0;
+
+	boot_dev = get_boot_device();
+	if (boot_dev == SD2_BOOT)
+		env_config_str = env_str_sd;
+	else if (boot_dev == MMC1_BOOT)
+		env_config_str = env_str_emmc;
+	else
+		return 0;
+
+	/*
+	 * Export a string to the devicetree that tells userspace tools like
+	 * libubootenv where the environment is currently coming from.
+	 */
+	return fdt_find_and_setprop(blob, "/chosen", "u-boot,env-config",
+				    env_config_str, strlen(env_config_str) + 1, 1);
+}
+
+static int setup_eqos(void)
+{
+	struct blk_ctrl_wakeupmix_regs *bctrl =
+		(struct blk_ctrl_wakeupmix_regs *)BLK_CTRL_WAKEUPMIX_BASE_ADDR;
+
+	/* set INTF as RGMII, enable RGMII TXC clock */
+	clrsetbits_le32(&bctrl->eqos_gpr,
+			BCTRL_GPR_ENET_QOS_INTF_MODE_MASK,
+			BCTRL_GPR_ENET_QOS_INTF_SEL_RGMII | BCTRL_GPR_ENET_QOS_CLK_GEN_EN);
+
+	return set_clk_eqos(ENET_125MHZ);
+}
+
+int board_init(void)
+{
+	if (IS_ENABLED(CONFIG_DWC_ETH_QOS))
+		setup_eqos();
+
+	return 0;
+}
+
+int board_late_init(void)
+{
+	if (IS_ENABLED(CONFIG_KONTRON_HW_UID))
+		get_serial_number(uid_otp_locations, ARRAY_SIZE(uid_otp_locations));
+
+	if (get_boot_device() == USB_BOOT) {
+		env_set("bootcmd", "fastboot 0");
+		env_set("bootdelay", "0");
+	}
+
+	return 0;
+}
+
+#if IS_ENABLED(CONFIG_ENV_IS_IN_MMC)
+int board_mmc_get_env_dev(int devno)
+{
+	return devno;
+}
+
+uint mmc_get_env_part(struct mmc *mmc)
+{
+	if (IS_SD(mmc))
+		return EMMC_HWPART_DEFAULT;
+
+	switch (EXT_CSD_EXTRACT_BOOT_PART(mmc->part_config)) {
+	case EMMC_BOOT_PART_BOOT1:
+		return EMMC_HWPART_BOOT1;
+	case EMMC_BOOT_PART_BOOT2:
+		return EMMC_HWPART_BOOT2;
+	default:
+		return EMMC_HWPART_DEFAULT;
+	}
+}
+
+int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
+{
+	/* use normal offset for SD card */
+	if (IS_SD(mmc)) {
+		*env_addr = CONFIG_ENV_OFFSET;
+		if (copy)
+			*env_addr = CONFIG_ENV_OFFSET_REDUND;
+
+		return 0;
+	}
+
+	switch (EXT_CSD_EXTRACT_BOOT_PART(mmc->part_config)) {
+	case EMMC_BOOT_PART_BOOT1:
+	case EMMC_BOOT_PART_BOOT2:
+		*env_addr = mmc->capacity - CONFIG_ENV_SIZE - CONFIG_ENV_SIZE;
+		if (copy)
+			*env_addr = mmc->capacity - CONFIG_ENV_SIZE;
+	break;
+	default:
+		*env_addr = CONFIG_ENV_OFFSET;
+		if (copy)
+			*env_addr = CONFIG_ENV_OFFSET_REDUND;
+	}
+
+	return 0;
+}
+#endif
+
+enum env_location env_get_location(enum env_operation op, int prio)
+{
+	if (prio)
+		return ENVL_UNKNOWN;
+
+	if (CONFIG_IS_ENABLED(ENV_IS_NOWHERE) && get_boot_device() == USB_BOOT)
+		return ENVL_NOWHERE;
+
+	return arch_env_get_location(op, prio);
+}

board/kontron/osm-s-mx93/osm-s-mx93.env

@@ -0,0 +1,6 @@
+kernel_addr_r=0x82000000
+fdt_addr_r=0x88000000
+fdtoverlay_addr_r=0x89000000
+ramdisk_addr_r=0x88080000
+scriptaddr=0x80000000
+pxefile_addr_r=0x80100000

board/kontron/osm-s-mx93/spl.c

@@ -0,0 +1,169 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Kontron Electronics GmbH
+ */
+
+#include <asm/arch/imx93_pins.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/ddr.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/global_data.h>
+#include <asm/gpio.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <dm/uclass.h>
+#include <dm/device.h>
+#include <dm/uclass-internal.h>
+#include <dm/device-internal.h>
+#include <hang.h>
+#include <i2c.h>
+#include <init.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <power/pca9450.h>
+#include <power/pmic.h>
+#include <spl.h>
+#include <asm/sections.h>
+#include <asm/arch/trdc.h>
+#include <asm/arch/ccm_regs.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int spl_board_boot_device(enum boot_device boot_dev_spl)
+{
+	if (IS_ENABLED(CONFIG_SPL_BOOTROM_SUPPORT))
+		return BOOT_DEVICE_BOOTROM;
+
+	switch (boot_dev_spl) {
+	case SD1_BOOT:
+	case MMC1_BOOT:
+		return BOOT_DEVICE_MMC1;
+	case SD2_BOOT:
+	case MMC2_BOOT:
+		return BOOT_DEVICE_MMC2;
+	default:
+		return BOOT_DEVICE_NONE;
+	}
+}
+
+bool check_ram_available(long size)
+{
+	long sz = get_ram_size((long *)PHYS_SDRAM, size);
+
+	if (sz == size)
+		return true;
+
+	return false;
+}
+
+static void spl_dram_init(void)
+{
+	if (ddr_init(&dram_timing) || !check_ram_available(SZ_2G))
+		printf("Failed to initialize DDR RAM!\n");
+
+	printf("DDR:   LPDDR4 initialized (2GB)\n");
+}
+
+void spl_board_init(void)
+{
+	puts("Normal Boot\n");
+}
+
+static int power_init_board(void)
+{
+	struct udevice *dev;
+	int ret  = pmic_get("pmic@25", &dev);
+
+	if (ret == -ENODEV)
+		puts("No pmic found\n");
+
+	if (ret)
+		return ret;
+
+	/* BUCKxOUT_DVS0/1 control BUCK123 output */
+	pmic_reg_write(dev, PCA9450_BUCK123_DVS, 0x29);
+
+	/* enable DVS control through PMIC_STBY_REQ */
+	pmic_reg_write(dev, PCA9450_BUCK1CTRL, 0x59);
+
+	/* 0.9v for Over drive mode */
+	pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS0, 0x18);
+	pmic_reg_write(dev, PCA9450_BUCK3OUT_DVS0, 0x18);
+
+	/* set standby voltage to 0.65v */
+	pmic_reg_write(dev, PCA9450_BUCK1OUT_DVS1, 0x4);
+
+	/* I2C_LT_EN*/
+	pmic_reg_write(dev, 0xa, 0x3);
+
+	return 0;
+}
+
+const char *spl_board_loader_name(u32 boot_device)
+{
+	static char name[16];
+	struct mmc *mmc;
+
+	switch (boot_device) {
+	case BOOT_DEVICE_MMC1:
+		mmc_init_device(0);
+		mmc = find_mmc_device(0);
+		mmc_init(mmc);
+		snprintf(name, sizeof(name), "eMMC %s",
+			 emmc_hwpart_names[EXT_CSD_EXTRACT_BOOT_PART(mmc->part_config)]);
+		return name;
+	case BOOT_DEVICE_MMC2:
+		sprintf(name, "SD card");
+		return name;
+	}
+
+	return NULL;
+}
+
+extern int imx9_probe_mu(void);
+void board_init_f(ulong dummy)
+{
+	int ret;
+
+	/* Clear the BSS. */
+	memset(__bss_start, 0, __bss_end - __bss_start);
+	timer_init();
+
+	arch_cpu_init();
+
+	board_early_init_f();
+
+	spl_early_init();
+
+	preloader_console_init();
+
+	ret = imx9_probe_mu();
+	if (ret) {
+		printf("Fail to init Sentinel API\n");
+	} else {
+		debug("SOC: 0x%x\n", gd->arch.soc_rev);
+		debug("LC: 0x%x\n", gd->arch.lifecycle);
+	}
+
+	power_init_board();
+
+	if (!IS_ENABLED(CONFIG_IMX9_LOW_DRIVE_MODE))
+		set_arm_clk(get_cpu_speed_grade_hz());
+
+	/* Init power of mix */
+	soc_power_init();
+
+	/* Setup TRDC for DDR access */
+	trdc_init();
+
+	/* DDR initialization */
+	spl_dram_init();
+
+	/* Put M33 into CPUWAIT for following kick */
+	ret = m33_prepare();
+	if (ret)
+		printf("M33 prepare failed!\n");
+
+	board_init_r(NULL, 0);
+}

configs/kontron-osm-s-mx93.config

@@ -0,0 +1,197 @@
+CONFIG_ARM=y
+CONFIG_ARCH_IMX9=y
+CONFIG_TEXT_BASE=0x80200000
+CONFIG_SYS_MALLOC_LEN=0x2000000
+CONFIG_SYS_MALLOC_F_LEN=0x20000
+CONFIG_SPL_GPIO=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_NR_DRAM_BANKS=2
+CONFIG_ENV_SIZE=0x10000
+CONFIG_ENV_OFFSET=0x1E0000
+CONFIG_IMX_CONFIG="arch/arm/mach-imx/imx9/imximage.cfg"
+CONFIG_DM_GPIO=y
+CONFIG_KONTRON_HW_UID=y
+CONFIG_DEFAULT_DEVICE_TREE="freescale/imx93-kontron-bl-osm-s"
+CONFIG_TARGET_KONTRON_MX93=y
+CONFIG_OF_LIBFDT_OVERLAY=y
+CONFIG_SPL_MMC=y
+CONFIG_SPL_SERIAL=y
+CONFIG_SPL_DRIVERS_MISC=y
+CONFIG_BOOTCOUNT_BOOTLIMIT=3
+CONFIG_SPL_STACK=0x20519dd0
+CONFIG_SPL_TEXT_BASE=0x2049A000
+CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
+CONFIG_SPL_BSS_START_ADDR=0x2051a000
+CONFIG_SPL_BSS_MAX_SIZE=0x2000
+CONFIG_SYS_LOAD_ADDR=0x82000000
+CONFIG_SPL=y
+CONFIG_ENV_OFFSET_REDUND=0x1F0000
+CONFIG_IMX_ELE_DEK_ENCAP=y
+CONFIG_SPL_IMX_ROMAPI_LOADADDR=0x88000000
+CONFIG_LTO=y
+CONFIG_EFI_SET_TIME=y
+CONFIG_FIT=y
+CONFIG_FIT_EXTERNAL_OFFSET=0x3000
+CONFIG_BOOTSTD_FULL=y
+CONFIG_BOOTMETH_RAUC=y
+CONFIG_SYS_CBSIZE=2048
+CONFIG_SYS_PBSIZE=2074
+CONFIG_BOARD_LATE_INIT=y
+CONFIG_SPL_MAX_SIZE=0x26000
+CONFIG_SPL_BOARD_INIT=y
+CONFIG_SPL_LOAD_IMX_CONTAINER=y
+CONFIG_IMX_CONTAINER_CFG="arch/arm/mach-imx/imx9/container.cfg"
+# CONFIG_SPL_SHARES_INIT_SP_ADDR is not set
+CONFIG_SPL_HAVE_INIT_STACK=y
+CONFIG_SPL_SYS_MALLOC=y
+CONFIG_SPL_HAS_CUSTOM_MALLOC_START=y
+CONFIG_SPL_CUSTOM_SYS_MALLOC_ADDR=0x83200000
+CONFIG_SPL_SYS_MALLOC_SIZE=0x80000
+CONFIG_SPL_SYS_MMCSD_RAW_MODE=y
+CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x300
+CONFIG_SPL_I2C=y
+CONFIG_SPL_POWER=y
+CONFIG_SPL_WATCHDOG=y
+CONFIG_CMD_NVEDIT_EFI=y
+CONFIG_CRC32_VERIFY=y
+CONFIG_CMD_EEPROM=y
+CONFIG_SYS_I2C_EEPROM_ADDR_LEN=2
+CONFIG_SYS_EEPROM_SIZE=8192
+CONFIG_SYS_EEPROM_PAGE_WRITE_BITS=5
+CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS=6
+CONFIG_CMD_MD5SUM=y
+CONFIG_MD5SUM_VERIFY=y
+CONFIG_CMD_MEMTEST=y
+CONFIG_CMD_SHA1SUM=y
+CONFIG_SHA1SUM_VERIFY=y
+# CONFIG_CMD_LZMADEC is not set
+CONFIG_CMD_CLK=y
+CONFIG_CMD_DFU=y
+CONFIG_CMD_FUSE=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_GPT=y
+CONFIG_CMD_GPT_RENAME=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_LSBLK=y
+CONFIG_CMD_MBR=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_BKOPS_ENABLE=y
+CONFIG_MMC_SPEED_MODE_SET=y
+CONFIG_CMD_READ=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_USB_SDP=y
+CONFIG_CMD_USB_MASS_STORAGE=y
+CONFIG_CMD_WDT=y
+CONFIG_CMD_BOOTCOUNT=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_EFIDEBUG=y
+CONFIG_CMD_RTC=y
+CONFIG_CMD_TIME=y
+CONFIG_CMD_GETTIME=y
+CONFIG_CMD_TIMER=y
+CONFIG_CMD_UUID=y
+CONFIG_CMD_PMIC=y
+CONFIG_CMD_REGULATOR=y
+CONFIG_CMD_HASH=y
+CONFIG_CMD_SMC=y
+CONFIG_HASH_VERIFY=y
+CONFIG_CMD_BTRFS=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FS_UUID=y
+CONFIG_PARTITION_TYPE_GUID=y
+CONFIG_OF_CONTROL=y
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_UPSTREAM=y
+CONFIG_ENV_IS_NOWHERE=y
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_ENV_REDUNDANT=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
+CONFIG_USE_HOSTNAME=y
+CONFIG_HOSTNAME="kontron-mx93"
+CONFIG_VERSION_VARIABLE=y
+CONFIG_TFTP_TSIZE=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_SPL_DM=y
+CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_REGMAP=y
+CONFIG_SYSCON=y
+CONFIG_ADC=y
+CONFIG_ADC_IMX93=y
+CONFIG_BOOTCOUNT_LIMIT=y
+CONFIG_BOOTCOUNT_ENV=y
+CONFIG_SPL_CLK_IMX93=y
+CONFIG_CLK_IMX93=y
+CONFIG_USB_FUNCTION_FASTBOOT=y
+CONFIG_FASTBOOT_BUF_ADDR=0x82000000
+CONFIG_FASTBOOT_FLASH=y
+CONFIG_FASTBOOT_UUU_SUPPORT=y
+CONFIG_FASTBOOT_FLASH_MMC_DEV=0
+CONFIG_FASTBOOT_MMC_BOOT_SUPPORT=y
+CONFIG_FASTBOOT_MMC_USER_SUPPORT=y
+CONFIG_GPIO_HOG=y
+CONFIG_IMX_RGPIO2P=y
+CONFIG_DM_I2C=y
+CONFIG_DM_I2C_GPIO=y
+CONFIG_SYS_I2C_IMX_LPI2C=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_USB_HUB_USB251XB=y
+CONFIG_I2C_EEPROM=y
+CONFIG_SPL_I2C_EEPROM=y
+CONFIG_SYS_I2C_EEPROM_ADDR=0x50
+CONFIG_SUPPORT_EMMC_BOOT=y
+CONFIG_MMC_IO_VOLTAGE=y
+CONFIG_SPL_MMC_IO_VOLTAGE=y
+CONFIG_MMC_UHS_SUPPORT=y
+CONFIG_SPL_MMC_UHS_SUPPORT=y
+CONFIG_MMC_HS400_ES_SUPPORT=y
+CONFIG_MMC_HS400_SUPPORT=y
+CONFIG_FSL_USDHC=y
+CONFIG_PHY_ETHERNET_ID=y
+CONFIG_DM_ETH_PHY=y
+CONFIG_PHY_GIGE=y
+CONFIG_DWC_ETH_QOS=y
+CONFIG_DWC_ETH_QOS_IMX=y
+CONFIG_FEC_MXC=y
+CONFIG_RGMII=y
+CONFIG_MII=y
+CONFIG_RMII=y
+CONFIG_PINCTRL=y
+CONFIG_SPL_PINCTRL=y
+CONFIG_PINCTRL_IMX93=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_DM_PMIC=y
+CONFIG_DM_PMIC_PCA9450=y
+CONFIG_SPL_DM_PMIC_PCA9450=y
+CONFIG_DM_REGULATOR=y
+CONFIG_SPL_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_PCA9450=y
+CONFIG_SPL_DM_REGULATOR_PCA9450=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_DM_RTC=y
+CONFIG_RTC_RV3028=y
+CONFIG_DM_SERIAL=y
+CONFIG_FSL_LPUART=y
+CONFIG_LPUART=y
+CONFIG_SPI=y
+CONFIG_DM_SPI=y
+CONFIG_MXC_SPI=y
+CONFIG_SYSRESET=y
+CONFIG_SPL_SYSRESET=y
+CONFIG_SYSRESET_PSCI=y
+CONFIG_SYSRESET_WATCHDOG=y
+CONFIG_DM_THERMAL=y
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_MANUFACTURER="FSL"
+CONFIG_USB_GADGET_VENDOR_NUM=0x1fc9
+CONFIG_USB_GADGET_PRODUCT_NUM=0x0152
+CONFIG_CI_UDC=y
+CONFIG_USB_ETHER=y
+CONFIG_USB_ETH_CDC=y
+CONFIG_IMX_WATCHDOG=y
+CONFIG_ULP_WATCHDOG=y

configs/kontron-osm-s-mx93_defconfig

@@ -0,0 +1,3 @@
+#include <configs/kontron-osm-s-mx93.config>
+
+CONFIG_SPL_BOOTROM_SUPPORT=y

doc/board/kontron/index.rst

@@ -7,6 +7,7 @@ Kontron
    :maxdepth: 2
 
    osm-s-mx8mp
+   osm-s-mx93
    pitx-imx8m
    sl28
    sl-mx6ul

doc/board/kontron/osm-s-mx93.rst

@@ -0,0 +1,95 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+Kontron Electronics i.MX93 SoMs and Boards
+===========================================
+
+The OSM-S i.MX93 by Kontron Electronics GmbH is a SoM module with an
+i.MX93 SoC, 2 GB LPDDR4 RAM, eMMC, PMIC, RTC.
+
+The matching evaluation boards (Board-Line, BL) have two Ethernet ports,
+USB 2.0, LVDS, SD card, CAN, RS485, RS232 and much more.
+
+The OSM-S i.MX93 is compliant to the Open Standard Module (OSM) 1.1
+specification, size S (https://sget.org/standards/osm).
+
+Quick Start
+-----------
+
+- Get and Build the Trusted Firmware-A (TF-A)
+- Get the DDR firmware
+- Build U-Boot
+- Boot
+
+.. note::
+
+   To build on a x86-64 host machine, you need a GNU cross toolchain for the
+   target architecture (aarch64). Check your distros package manager or
+   download and install the necessary tools (``aarch64-linux-gnu-*``) manually.
+
+Get and Build the Trusted Firmware-A (TF-A)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. note::
+
+   If you are using GCC 12 and you get compiler/linker errors, try to add the
+   following arguments to your make command as workaround:
+   ``CFLAGS="-Wno-array-bounds" LDFLAGS="--no-warn-rwx-segments"``
+
+1. Get TF-A from: https://github.com/nxp-imx/imx-atf, branch: lf_v2.12
+2. Build
+
+  .. code-block:: bash
+
+     $ make PLAT=imx93 CROSS_COMPILE=aarch64-linux-gnu- IMX_BOOT_UART_BASE="0x30880000" bl31
+     $ cp build/imx93/release/bl31.bin $(builddir)
+
+.. note::
+
+    *builddir* is U-Boot's build directory (source directory for in-tree builds)
+
+Get the DDR firmware
+^^^^^^^^^^^^^^^^^^^^
+
+.. code-block:: bash
+
+   $ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.28-994fa14.bin
+   $ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-ele-imx-2.0.2-89161a8.bin
+   $ chmod +x firmware-imx-8.28-994fa14.bin firmware-ele-imx-2.0.2-89161a8.bin
+   $ ./firmware-imx-8.28-994fa14.bin
+   $ ./firmware-ele-imx-2.0.2-89161a8.bin
+   $ cp firmware-imx-8.28-994fa14/firmware/ddr/synopsys/lpddr4_dmem_1d_v202201.bin $(builddir)
+   $ cp firmware-imx-8.28-994fa14/firmware/ddr/synopsys/lpddr4_dmem_2d_v202201.bin $(builddir)
+   $ cp firmware-imx-8.28-994fa14/firmware/ddr/synopsys/lpddr4_imem_1d_v202201.bin $(builddir)
+   $ cp firmware-imx-8.28-994fa14/firmware/ddr/synopsys/lpddr4_imem_2d_v202201.bin $(builddir)
+   $ cp firmware-ele-imx-2.0.2-89161a8/mx93a1-ahab-container.img $(builddir)
+
+Build U-Boot
+^^^^^^^^^^^^
+
+.. code-block:: bash
+
+   $ make kontron-osm-s-mx93_defconfig
+   $ make CROSS_COMPILE=aarch64-linux-gnu-
+
+Copy the flash.bin to SD card at an offset of 32 KiB:
+
+.. code-block:: bash
+
+   $ dd if=flash.bin of=/dev/sd[x] bs=1K seek=32 conv=fsync
+
+Boot
+^^^^
+
+Put the SD card in the slot on the board and apply power. Alternatively connect
+the USB Type-C Connector to your host machine, power up the board and load the
+bootloader via uuu-Tool (`uuu flash.bin`).
+
+Check the serial console for output.
+
+Further Information
+-------------------
+
+The bootloader configuration is setup to be used with kernel FIT images. Legacy
+images might not be working out of the box.
+
+Please see https://docs.kontron-electronics.de for further vendor documentation.

include/configs/kontron-osm-s-mx93.h

@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2024 Kontron Electronics GmbH
+ *
+ * Configuration settings for the Kontron OSM-S/BL i.MX93 boards and modules.
+ */
+#ifndef __KONTRON_MX93_CONFIG_H
+#define __KONTRON_MX93_CONFIG_H
+
+#include <asm/arch/imx-regs.h>
+#include <linux/sizes.h>
+
+/* RAM */
+#define PHYS_SDRAM			0x80000000
+#define PHYS_SDRAM_SIZE			(SZ_2G)
+#define CFG_SYS_SDRAM_BASE		PHYS_SDRAM
+
+#define CFG_SYS_INIT_RAM_ADDR	0x80000000
+#define CFG_SYS_INIT_RAM_SIZE	SZ_2M
+
+/* Board and environment settings */
+
+#ifdef CONFIG_USB_EHCI_HCD
+#define CFG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
+#define CFG_MXC_USB_FLAGS		0
+#endif
+
+#define WDOG_BASE_ADDR          WDG3_BASE_ADDR
+
+#endif /* __KONTRON_MX93_CONFIG_H */