bsh: imx6ulz_smm_m2: Add imx6ulz BSH SMM M2 boards

Introduce BSH SystemMaster (SMM) M2 board family, which consists of:
imx6ulz SMM M2 and imx6ulz SMM M2 PRO boards.

Add support for imx6ulz BSH SMM M2 board:

- 128 MiB DDR3 RAM
- 256MiB Nand
- USBOTG1 peripheral - fastboot.

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>

include/configs/imx6ulz_smm_m2.h

@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2021 Amarula Solutions B.V.
+ *
+ */
+#ifndef __IMX6ULZ_SMM_M2_CONFIG_H
+#define __IMX6ULZ_SMM_M2_CONFIG_H
+
+#include "mx6_common.h"
+
+#include <asm/arch/imx-regs.h>
+#include <linux/sizes.h>
+#include <linux/stringify.h>
+
+/* SPL options */
+#include "imx6_spl.h"
+
+#define CONFIG_MXC_UART_BASE		UART4_BASE
+
+#ifndef CONFIG_SPL_BUILD
+
+#define BOOT_TARGET_DEVICES(func) \
+	func(NAND, nand, 0) \
+
+#include <config_distro_bootcmd.h>
+
+#endif /* !CONFIG_SPL_BUILD */
+
+#define MEM_LAYOUT_ENV_SETTINGS \
+	"scriptaddr=" __stringify(CONFIG_SYS_LOAD_ADDR) "\0" \
+	"kernel_addr_r=" __stringify(CONFIG_SYS_LOAD_ADDR) "\0" \
+	"fdt_addr_r=0x81000000\0" \
+	"fdtfile=" CONFIG_DEFAULT_FDT_FILE "\0" \
+	"bootcmd_mfg=echo Running fastboot mode; fastboot usb 0\0" \
+
+#define NANDARGS \
+	"mtdids=" CONFIG_MTDIDS_DEFAULT "\0" \
+	CONFIG_MTDPARTS_DEFAULT "\0" \
+	"nandargs=setenv bootargs " \
+		"${optargs} " \
+		"mtdparts=${mtdparts} " \
+		"root=${nandroot} " \
+		"rootfstype=${nandrootfstype}\0" \
+	"nandroot=ubi0:root rw ubi.mtd=rootfs\0" \
+	"nandrootfstype=ubifs rootwait=1\0" \
+	"nandboot=echo Booting from nand ...; " \
+		"run nandargs; " \
+		"nand read ${fdt_addr_r} nanddtb; " \
+		"nand read ${loadaddr} kernel; " \
+		"bootz ${loadaddr} - ${fdt_addr_r}\0"
+
+#define BOOTENV_DEV_NAND(devtypeu, devtypel, instance) \
+	"bootcmd_" #devtypel #instance "=" \
+	"run nandboot\0"
+
+#define BOOTENV_DEV_NAME_NAND(devtypeu, devtypel, instance) \
+	#devtypel #instance " "
+
+/* Initial environment variables */
+#define CONFIG_EXTRA_ENV_SETTINGS \
+	MEM_LAYOUT_ENV_SETTINGS \
+	NANDARGS \
+	BOOTENV
+
+/* Physical Memory Map */
+#define PHYS_SDRAM			MMDC0_ARB_BASE_ADDR
+#define PHYS_SDRAM_SIZE			SZ_128M
+
+#define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM
+#define CONFIG_SYS_INIT_RAM_ADDR	IRAM_BASE_ADDR
+#define CONFIG_SYS_INIT_RAM_SIZE	IRAM_SIZE
+
+/* NAND */
+#define CONFIG_SYS_MAX_NAND_DEVICE	1
+
+#define CONFIG_SYS_NAND_BASE		0x20000000
+
+#endif