imx: Add variscite DART-6UL Evaluation Kit

Port for the DART-6UL Evaluation Kit SBC. Based on the variscite
DART-6UL iMX6ULL SoM.

CPU:   Freescale i.MX6ULL rev1.1 900 MHz (running at 396 MHz)
CPU:   Commercial temperature grade (0C to 95C) at 43C
Reset cause: POR
Model: Variscite DART-6UL Evaluation Kit
Board: Variscite DART-6UL Evaluation Kit
DRAM:  512 MiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
In:    serial@02020000
Out:   serial@02020000
Err:   serial@02020000
Net:   FEC0

Working:
 - Eth0
 - i2c
 - MMC/SD
 - eMMC
 - USB host
 - UART 1

Note: LCDIF porting needs DM_VIDEO
https://lists.denx.de/pipermail/u-boot/2019-April/365506.html

Signed-off-by: Parthiban Nallathambi <parthitce@gmail.com>
diff --git a/include/configs/dart_6ul.h b/include/configs/dart_6ul.h
new file mode 100644
index 0000000..fb1b899
--- /dev/null
+++ b/include/configs/dart_6ul.h
@@ -0,0 +1,131 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Board configuration file for Variscite DART-6UL Evaluation Kit
+ * Copyright (C) 2019 Parthiban Nallathambi <parthitce@gmail.com>
+ */
+#ifndef __DART_6UL_H
+#define __DART_6UL_H
+
+#include <linux/sizes.h>
+#include "mx6_common.h"
+
+/* SPL options */
+#include "imx6_spl.h"
+
+/* NAND pin conflicts with usdhc2 */
+#ifdef CONFIG_CMD_NAND
+#define CONFIG_SYS_FSL_USDHC_NUM        1
+#else
+#define CONFIG_SYS_FSL_USDHC_NUM        2
+#endif
+
+#ifdef CONFIG_CMD_NET
+#define CONFIG_FEC_ENET_DEV		0
+
+#if (CONFIG_FEC_ENET_DEV == 0)
+#define IMX_FEC_BASE			ENET_BASE_ADDR
+#define CONFIG_FEC_MXC_PHYADDR		0x1
+#define CONFIG_FEC_XCV_TYPE		RMII
+#define CONFIG_ETHPRIME			"eth0"
+#elif (CONFIG_FEC_ENET_DEV == 1)
+#define IMX_FEC_BASE			ENET2_BASE_ADDR
+#define CONFIG_FEC_MXC_PHYADDR		0x3
+#define CONFIG_FEC_XCV_TYPE		RMII
+#define CONFIG_ETHPRIME			"eth1"
+#endif
+#endif
+
+/* Size of malloc() pool */
+#define CONFIG_SYS_MALLOC_LEN		(16 * SZ_1M)
+
+/* Environment settings */
+#define CONFIG_ENV_SIZE			SZ_8K
+#define CONFIG_ENV_OFFSET		(14 * SZ_64K)
+#define CONFIG_SYS_REDUNDAND_ENVIRONMENT
+#define CONFIG_ENV_OFFSET_REDUND	\
+	(CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE)
+
+/* Environment in SD */
+#define CONFIG_SYS_MMC_ENV_DEV		0
+#define CONFIG_SYS_MMC_ENV_PART		0
+#define MMC_ROOTFS_DEV			0
+#define MMC_ROOTFS_PART			2
+
+/* Console configs */
+#define CONFIG_MXC_UART_BASE		UART1_BASE
+
+/* MMC Configs */
+#define CONFIG_FSL_USDHC
+
+#define CONFIG_SYS_FSL_ESDHC_ADDR	USDHC2_BASE_ADDR
+#define CONFIG_SUPPORT_EMMC_BOOT
+
+/* I2C configs */
+#ifdef CONFIG_CMD_I2C
+#define CONFIG_SYS_I2C_MXC_I2C1		/* enable I2C bus 1 */
+#define CONFIG_SYS_I2C_MXC_I2C2		/* enable I2C bus 2 */
+#define CONFIG_SYS_I2C_SPEED		100000
+#endif
+
+/* Miscellaneous configurable options */
+#define CONFIG_SYS_MEMTEST_START	0x80000000
+#define CONFIG_SYS_MEMTEST_END		(CONFIG_SYS_MEMTEST_START + 0x8000000)
+
+#define CONFIG_SYS_LOAD_ADDR		CONFIG_LOADADDR
+#define CONFIG_SYS_HZ			1000
+
+/* Physical Memory Map */
+#define PHYS_SDRAM			MMDC0_ARB_BASE_ADDR
+#define PHYS_SDRAM_SIZE			SZ_512M
+
+#define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM
+#define CONFIG_SYS_INIT_RAM_ADDR	IRAM_BASE_ADDR
+#define CONFIG_SYS_INIT_RAM_SIZE	IRAM_SIZE
+
+#define CONFIG_SYS_INIT_SP_OFFSET \
+	(CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)
+#define CONFIG_SYS_INIT_SP_ADDR \
+	(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
+
+/* USB Configs */
+#define CONFIG_EHCI_HCD_INIT_AFTER_RESET
+#define CONFIG_MXC_USB_PORTSC		(PORT_PTS_UTMI | PORT_PTS_PTW)
+#define CONFIG_MXC_USB_FLAGS		0
+#define CONFIG_USB_MAX_CONTROLLER_COUNT	2
+
+#define CONFIG_IMX_THERMAL
+
+#define ENV_MMC \
+	"mmcdev=" __stringify(MMC_ROOTFS_DEV) "\0" \
+	"mmcpart=" __stringify(MMC_ROOTFS_PART) "\0" \
+	"fitpart=1\0" \
+	"bootdelay=3\0" \
+	"silent=1\0" \
+	"optargs=rw rootwait\0" \
+	"mmcautodetect=yes\0" \
+	"mmcrootfstype=ext4\0" \
+	"mmcfit_name=fitImage\0" \
+	"mmcloadfit=fatload mmc ${mmcdev}:${fitpart} ${fit_addr} " \
+		    "${mmcfit_name}\0" \
+	"mmcargs=setenv bootargs " \
+		"root=/dev/mmcblk${mmcdev}p${mmcpart} ${optargs} " \
+		"console=${console} rootfstype=${mmcrootfstype}\0" \
+	"mmc_mmc_fit=run mmcloadfit;run mmcargs addcon; bootm ${fit_addr}\0" \
+
+/* Default environment */
+#define CONFIG_EXTRA_ENV_SETTINGS \
+	"fdt_high=0xffffffff\0" \
+	"console=ttymxc0,115200n8\0" \
+	"addcon=setenv bootargs ${bootargs} console=${console},${baudrate}\0" \
+	"fit_addr=0x82000000\0" \
+	ENV_MMC
+
+#define CONFIG_BOOTCOMMAND		"run mmc_mmc_fit"
+
+#define BOOT_TARGET_DEVICES(func) \
+	func(MMC, mmc, 0) \
+	func(MMC, mmc, 1) \
+	func(DHCP, dhcp, na)
+
+#include <config_distro_bootcmd.h>
+#endif /* __DART_6UL_H */