siemens,am33x: add draco etamin board

In the draco CPU board family, etamin is a new variant
with bigger flash and more RAM. Due to new flash that
uses larger pages (4K) some changes are necessary because
it impacts the MTD partition layout and the ubi mount
parameters.

Signed-off-by: Samuel Egli <samuel.egli@siemens.com>
Signed-off-by: Heiko Schocher <hs@denx.de>
[trini: Move BOOTDELAY into defconfig, just always be 3 now]
Signed-off-by: Tom Rini <trini@konsulko.com>

arch/arm/Kconfig

@@ -361,6 +361,11 @@ config TARGET_RASTABAN
 	select CPU_V7
 	select SUPPORT_SPL
 
+config TARGET_ETAMIN
+        bool "Support etamin"
+        select CPU_V7
+        select SUPPORT_SPL
+
 config TARGET_PXM2
 	bool "Support pxm2"
 	select CPU_V7

board/siemens/common/board.c

@@ -83,8 +83,12 @@ int board_init(void)
 #ifdef CONFIG_FACTORYSET
 	factoryset_read_eeprom(CONFIG_SYS_I2C_EEPROM_ADDR);
 #endif
+
 	gpmc_init();
 
+#ifdef CONFIG_NAND_CS_INIT
+	board_nand_cs_init();
+#endif
 #ifdef CONFIG_VIDEO
 	board_video_init();
 #endif

board/siemens/draco/Kconfig

@@ -45,3 +45,19 @@ config SYS_CONFIG_NAME
 	default "rastaban"
 
 endif
+
+if TARGET_ETAMIN
+
+config SYS_BOARD
+        default "draco"
+
+config SYS_VENDOR
+        default "siemens"
+
+config SYS_SOC
+        default "am33xx"
+
+config SYS_CONFIG_NAME
+        default "etamin"
+
+endif

board/siemens/draco/MAINTAINERS

@@ -4,6 +4,7 @@ S:	Maintained
 F:	board/siemens/draco/
 F:	include/configs/draco.h
 F:	configs/draco_defconfig
+F:	configs/etamin_defconfig
 F:	include/configs/thuban.h
 F:	configs/thuban_defconfig
 F:	include/configs/rastaban.h

board/siemens/draco/board.c

@@ -24,6 +24,7 @@
 #include <asm/arch/gpio.h>
 #include <asm/arch/mmc_host_def.h>
 #include <asm/arch/sys_proto.h>
+#include <asm/arch/mem.h>
 #include <asm/io.h>
 #include <asm/emif.h>
 #include <asm/gpio.h>
@@ -33,6 +34,7 @@
 #include <watchdog.h>
 #include "board.h"
 #include "../common/factoryset.h"
+#include <nand.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -40,6 +42,7 @@ DECLARE_GLOBAL_DATA_PTR;
 static struct draco_baseboard_id __attribute__((section(".data"))) settings;
 
 #if DDR_PLL_FREQ == 303
+#if !defined(CONFIG_TARGET_ETAMIN)
 /* Default@303MHz-i0 */
 const struct ddr3_data ddr3_default = {
 	0x33524444, 0x56312e35, 0x0080, 0x0000, 0x003A, 0x003F, 0x009F,
@@ -48,6 +51,16 @@ const struct ddr3_data ddr3_default = {
 	"default name @303MHz           \0",
 	"default marking                \0",
 };
+#else
+/* etamin board */
+const struct ddr3_data ddr3_default = {
+	0x33524444, 0x56312e36, 0x0080, 0x0000, 0x003A, 0x0010, 0x009F,
+	0x0050, 0x0888A39B, 0x266D7FDA, 0x501F86AF, 0x00100206, 0x61A44BB2,
+	0x0000093B, 0x0000018A,
+	"test-etamin                    \0",
+	"generic-8Gbit                  \0",
+};
+#endif
 #elif DDR_PLL_FREQ == 400
 /* Default@400MHz-i0 */
 const struct ddr3_data ddr3_default = {
@@ -210,6 +223,7 @@ struct ctrl_ioregs draco_ddr3_ioregs = {
 	draco_ddr3_emif_reg_data.emif_ddr_phy_ctlr_1 =
 		settings.ddr3.emif_ddr_phy_ctlr_1;
 	draco_ddr3_emif_reg_data.sdram_config = settings.ddr3.sdram_config;
+	draco_ddr3_emif_reg_data.sdram_config2 = 0x08000000;
 	draco_ddr3_emif_reg_data.ref_ctrl = settings.ddr3.ref_ctrl;
 
 	draco_ddr3_data.datardsratio0 = settings.ddr3.dt0rdsratio0;
@@ -251,6 +265,10 @@ int board_late_init(void)
 
 	nand_curr_device = 0;
 	omap_nand_switch_ecc(1, ecc_type);
+#ifdef CONFIG_TARGET_ETAMIN
+	nand_curr_device = 1;
+	omap_nand_switch_ecc(1, ecc_type);
+#endif
 #ifdef CONFIG_FACTORYSET
 	/* Set ASN in environment*/
 	if (factory_dat.asn[0] != 0) {
@@ -326,7 +344,7 @@ int board_eth_init(bd_t *bis)
 }
 
 static int do_switch_reset(cmd_tbl_t *cmdtp, int flag, int argc,
-			   char *const argv[])
+			  char *const argv[])
 {
 	/* Reset SMSC LAN9303 switch for default configuration */
 	gpio_request(GPIO_LAN9303_NRST, "nRST");
@@ -346,4 +364,23 @@ U_BOOT_CMD(
 #endif /* #if defined(CONFIG_DRIVER_TI_CPSW) */
 #endif /* #if (defined(CONFIG_DRIVER_TI_CPSW) && !defined(CONFIG_SPL_BUILD)) */
 
+#ifdef CONFIG_NAND_CS_INIT
+/* GPMC definitions for second nand cs1 */
+static const u32 gpmc_nand_config[] = {
+	ETAMIN_NAND_GPMC_CONFIG1,
+	ETAMIN_NAND_GPMC_CONFIG2,
+	ETAMIN_NAND_GPMC_CONFIG3,
+	ETAMIN_NAND_GPMC_CONFIG4,
+	ETAMIN_NAND_GPMC_CONFIG5,
+	ETAMIN_NAND_GPMC_CONFIG6,
+	/*CONFIG7- computed as params */
+};
+
+static void board_nand_cs_init(void)
+{
+	enable_gpmc_cs_config(gpmc_nand_config, &gpmc_cfg->cs[1],
+			      0x18000000, GPMC_SIZE_16M);
+}
+#endif
+
 #include "../common/board.c"

board/siemens/draco/mux.c

@@ -51,6 +51,7 @@ static struct module_pin_mux nand_pin_mux[] = {
 	{OFFSET(gpmc_wait0), (MODE(0) | RXACTIVE | PULLUP_EN)}, /* NAND WAIT */
 	{OFFSET(gpmc_wpn), (MODE(7) | PULLUP_EN | RXACTIVE)},	/* NAND_WPN */
 	{OFFSET(gpmc_csn0), (MODE(0) | PULLUDEN)},	/* NAND_CS0 */
+	{OFFSET(gpmc_csn1), MODE(0) | PULLUDEN | PULLUP_EN},    /* NAND_CS1 */
 	{OFFSET(gpmc_advn_ale), (MODE(0) | PULLUDEN)}, /* NAND_ADV_ALE */
 	{OFFSET(gpmc_oen_ren), (MODE(0) | PULLUDEN)},	/* NAND_OE */
 	{OFFSET(gpmc_wen), (MODE(0) | PULLUDEN)},	/* NAND_WEN */
@@ -68,7 +69,6 @@ static struct module_pin_mux gpios_pin_mux[] = {
 	{OFFSET(mmc0_dat1), MODE(7) | PULLUDDIS | RXACTIVE},	/* Y3 GPIO2_28*/
 	{OFFSET(mmc0_dat2), MODE(7) | PULLUDDIS | RXACTIVE},	/* Y7 GPIO2_27*/
 	/* Triacs initial HW Rev */
-	{OFFSET(gpmc_csn1), MODE(7) | RXACTIVE | PULLUDDIS},	/* 1_30 Y0 */
 	{OFFSET(gpmc_be1n), MODE(7) | RXACTIVE | PULLUDDIS},	/* 1_28 Y1 */
 	{OFFSET(gpmc_csn2), MODE(7) | RXACTIVE | PULLUDDIS},	/* 1_31 Y2 */
 	{OFFSET(lcd_data15), MODE(7) | RXACTIVE | PULLUDDIS},	/* 0_11 Y3 */

configs/etamin_defconfig

@@ -0,0 +1,18 @@
+CONFIG_ARM=y
+CONFIG_TARGET_ETAMIN=y
+CONFIG_SPL=y
+CONFIG_BOOTDELAY=3
+CONFIG_SYS_PROMPT="U-Boot# "
+CONFIG_AUTOBOOT_KEYED=y
+CONFIG_AUTOBOOT_PROMPT="Autobooting in %d seconds, press \"<Esc><Esc>\" to stop\n"
+CONFIG_AUTOBOOT_STOP_STR="\x1b\x1b"
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_GPIO=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SYS_NS16550=y
+CONFIG_USB=y
+CONFIG_USB_GADGET=y
+CONFIG_OF_LIBFDT=y

include/configs/draco.h

@@ -73,6 +73,7 @@
 /* Default env settings */
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"hostname=draco\0" \
+	"ubi_off=2048\0"\
 	"nand_img_size=0x400000\0" \
 	"optargs=\0" \
 	"preboot=draco_led 0\0" \

include/configs/etamin.h

@@ -0,0 +1,257 @@
+/*
+ * (C) Copyright 2013 Siemens Schweiz AG
+ * (C) Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * Based on:
+ * U-Boot file:/include/configs/am335x_evm.h
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __CONFIG_ETAMIN_H
+#define __CONFIG_ETAMIN_H
+
+#include "siemens-am33x-common.h"
+/* NAND specific changes for etamin due to different page size */
+#undef CONFIG_SYS_NAND_PAGE_SIZE
+#undef CONFIG_SYS_NAND_OOBSIZE
+#undef CONFIG_SYS_NAND_BLOCK_SIZE
+#undef CONFIG_SYS_NAND_ECCPOS
+#undef CONFIG_SYS_NAND_U_BOOT_OFFS
+#undef CONFIG_SYS_ENV_SECT_SIZE
+#undef CONFIG_ENV_OFFSET
+#undef CONFIG_NAND_OMAP_ECCSCHEME
+#define CONFIG_NAND_OMAP_ECCSCHEME	OMAP_ECC_BCH16_CODE_HW
+
+#define CONFIG_ENV_OFFSET       0x980000
+#define CONFIG_SYS_ENV_SECT_SIZE       (512 << 10)     /* 512 KiB */
+#define CONFIG_SYS_NAND_PAGE_SIZE       4096
+#define CONFIG_SYS_NAND_OOBSIZE         224
+#define CONFIG_SYS_NAND_BLOCK_SIZE      (128 * CONFIG_SYS_NAND_PAGE_SIZE)
+#define CONFIG_SYS_NAND_ECCPOS	{ 2, 3, 4, 5, 6, 7, 8, 9, \
+				10, 11, 12, 13, 14, 15, 16, 17, 18, 19, \
+				20, 21, 22, 23, 24, 25, 26, 27, 28, 29, \
+				30, 31, 32, 33, 34, 35, 36, 37, 38, 39, \
+				40, 41, 42, 43, 44, 45, 46, 47, 48, 49, \
+				50, 51, 52, 53, 54, 55, 56, 57, 58, 59, \
+				60, 61, 62, 63, 64, 65, 66, 67, 68, 69, \
+				70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \
+				80, 81, 82, 83, 84, 85, 86, 87, 88, 89, \
+				90, 91, 92, 93, 94, 95, 96, 97, 98, 99, \
+			100, 101, 102, 103, 104, 105, 106, 107, 108, 109, \
+			110, 111, 112, 113, 114, 115, 116, 117, 118, 119, \
+			120, 121, 122, 123, 124, 125, 126, 127, 128, 129, \
+			130, 131, 132, 133, 134, 135, 136, 137, 138, 139, \
+			140, 141, 142, 143, 144, 145, 146, 147, 148, 149, \
+			150, 151, 152, 153, 154, 155, 156, 157, 158, 159, \
+			160, 161, 162, 163, 164, 165, 166, 167, 168, 169, \
+			170, 171, 172, 173, 174, 175, 176, 177, 178, 179, \
+			180, 181, 182, 183, 184, 185, 186, 187, 188, 189, \
+			190, 191, 192, 193, 194, 195, 196, 197, 198, 199, \
+			200, 201, 202, 203, 204, 205, 206, 207, 208, 209, \
+			}
+
+#undef CONFIG_SYS_NAND_ECCSIZE
+#undef CONFIG_SYS_NAND_ECCBYTES
+#define CONFIG_SYS_NAND_ECCSIZE 512
+#define CONFIG_SYS_NAND_ECCBYTES 26
+
+#define CONFIG_SYS_NAND_U_BOOT_OFFS     0x200000
+
+#define CONFIG_SYS_NAND_MAX_CHIPS       1
+
+#undef CONFIG_SYS_MAX_NAND_DEVICE
+#define CONFIG_SYS_MAX_NAND_DEVICE      3
+#define CONFIG_SYS_NAND_BASE2           (0x18000000)    /* physical address */
+#define CONFIG_SYS_NAND_BASE_LIST       {CONFIG_SYS_NAND_BASE, \
+					CONFIG_SYS_NAND_BASE2}
+
+#define CONFIG_SYS_NAND_ONFI_DETECTION
+#define CONFIG_DISPLAY_CPUINFO
+#define CONFIG_SYS_MPUCLK	300
+#define DDR_PLL_FREQ	303
+#undef CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC
+
+/* FWD Button = 27
+ * SRV Button = 87 */
+#define BOARD_DFU_BUTTON_GPIO	27
+#define GPIO_LAN9303_NRST	88	/* GPIO2_24 = gpio88 */
+/* In dfu mode keep led1 on */
+#define CONFIG_ENV_SETTINGS_BUTTONS_AND_LEDS \
+	"button_dfu0=27\0" \
+	"button_dfu1=87\0" \
+	"led0=3,0,1\0" \
+	"led1=4,0,0\0" \
+	"led2=5,0,1\0" \
+	"led3=87,0,1\0" \
+	"led4=60,0,1\0" \
+	"led5=63,0,1\0"
+
+#undef CONFIG_DOS_PARTITION
+#undef CONFIG_CMD_FAT
+
+#define CONFIG_BOARD_LATE_INIT
+
+/* Physical Memory Map */
+#define CONFIG_MAX_RAM_BANK_SIZE       (1024 << 20)    /* 1GB */
+
+/* I2C Configuration */
+#define CONFIG_SYS_I2C_SPEED		100000
+
+#define CONFIG_SYS_I2C_EEPROM_ADDR              0x50
+#define EEPROM_ADDR_DDR3 0x90
+#define EEPROM_ADDR_CHIP 0x120
+
+#define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS	0x300
+
+#undef CONFIG_SPL_NET_SUPPORT
+#undef CONFIG_SPL_NET_VCI_STRING
+#undef CONFIG_SPL_ETH_SUPPORT
+
+#undef CONFIG_MII
+#undef CONFIG_PHY_GIGE
+#define CONFIG_PHY_SMSC
+
+#define CONFIG_FACTORYSET
+
+/* use both define to compile a SPL compliance test  */
+/*
+#define CONFIG_SPL_CMT
+#define CONFIG_SPL_CMT_DEBUG
+*/
+
+/* nedded by compliance test in read mode */
+#if defined(CONFIG_SPL_CMT)
+#define CONFIG_SYS_DCACHE_OFF
+#endif
+
+/* Watchdog */
+#define CONFIG_OMAP_WATCHDOG
+
+/* Define own nand partitions */
+#define CONFIG_ENV_OFFSET_REDUND	0xB80000
+#define CONFIG_ENV_SIZE_REDUND		CONFIG_ENV_SIZE
+#define CONFIG_ENV_RANGE		(4 * CONFIG_SYS_ENV_SECT_SIZE)
+
+
+
+#define CONFIG_DFU_MTD
+#undef COMMON_ENV_DFU_ARGS
+#define COMMON_ENV_DFU_ARGS	"dfu_args=run bootargs_defaults;" \
+				"setenv bootargs ${bootargs};" \
+				"mtdparts default;" \
+				"draco_led 1;" \
+				"dfu 0 mtd 0;" \
+				"draco_led 0;\0" \
+
+#undef DFU_ALT_INFO_NAND_V2
+#define DFU_ALT_INFO_NAND_V2 \
+	"spl mtddev;" \
+	"spl.backup1 mtddev;" \
+	"spl.backup2 mtddev;" \
+	"spl.backup3 mtddev;" \
+	"u-boot mtddev;" \
+	"u-boot.env0 mtddev;" \
+	"u-boot.env1 mtddev;" \
+	"rootfs mtddevubi" \
+
+#undef MTDIDS_NAME_STR
+#define MTDIDS_NAME_STR		"omap2-nand_concat"
+#undef MTDIDS_DEFAULT
+#define MTDIDS_DEFAULT		"nand2=" MTDIDS_NAME_STR
+
+#undef MTDPARTS_DEFAULT_V2
+#define MTDPARTS_DEFAULT_V2     "mtdparts=" MTDIDS_NAME_STR ":" \
+				"512k(spl)," \
+				"512k(spl.backup1)," \
+				"512k(spl.backup2)," \
+				"512k(spl.backup3)," \
+				"7680k(u-boot)," \
+				"2048k(u-boot.env0)," \
+				"2048k(u-boot.env1)," \
+				"2048k(mtdoops)," \
+				"-(rootfs)"
+
+#undef MTDPARTS_DEFAULT
+#define MTDPARTS_DEFAULT	MTDPARTS_DEFAULT_V2
+
+#undef CONFIG_ENV_SETTINGS_NAND_V2
+#define CONFIG_ENV_SETTINGS_NAND_V2 \
+	"nand_active_ubi_vol=rootfs_a\0" \
+	"rootfs_name=rootfs\0" \
+	"kernel_name=uImage\0"\
+	"nand_root_fs_type=ubifs rootwait=1\0" \
+	"nand_args=run bootargs_defaults;" \
+		"mtdparts default;" \
+		"setenv ${partitionset_active} true;" \
+		"if test -n ${A}; then " \
+			"setenv nand_active_ubi_vol ${rootfs_name}_a;" \
+		"fi;" \
+		"if test -n ${B}; then " \
+			"setenv nand_active_ubi_vol ${rootfs_name}_b;" \
+		"fi;" \
+		"setenv nand_root ubi0:${nand_active_ubi_vol} rw " \
+		"ubi.mtd=rootfs,${ubi_off};" \
+		"setenv bootargs ${bootargs} " \
+		"root=${nand_root} noinitrd ${mtdparts} " \
+		"rootfstype=${nand_root_fs_type} ip=${ip_method} " \
+		"console=ttyMTD,mtdoops console=ttyO0,115200n8 mtdoops.mtddev" \
+		"=mtdoops\0" \
+	COMMON_ENV_DFU_ARGS \
+		"dfu_alt_info=" DFU_ALT_INFO_NAND_V2 "\0" \
+	COMMON_ENV_NAND_BOOT \
+		"ubi part rootfs ${ubi_off};" \
+		"ubifsmount ubi0:${nand_active_ubi_vol};" \
+		"ubifsload ${kloadaddr} boot/${kernel_name};" \
+		"ubifsload ${loadaddr} boot/${dtb_name}.dtb;" \
+		"bootm ${kloadaddr} - ${loadaddr}\0" \
+	"nand_boot_backup=ubifsload ${loadaddr} boot/am335x-draco.dtb;" \
+		"bootm ${kloadaddr} - ${loadaddr}\0" \
+	COMMON_ENV_NAND_CMDS
+
+#ifndef CONFIG_SPL_BUILD
+
+#define CONFIG_NAND_CS_INIT
+#define ETAMIN_NAND_GPMC_CONFIG1	0x00000800
+#define ETAMIN_NAND_GPMC_CONFIG2	0x001e1e00
+#define ETAMIN_NAND_GPMC_CONFIG3	0x001e1e00
+#define ETAMIN_NAND_GPMC_CONFIG4	0x16051807
+#define ETAMIN_NAND_GPMC_CONFIG5	0x00151e1e
+#define ETAMIN_NAND_GPMC_CONFIG6	0x16000f80
+#define CONFIG_MTD_CONCAT
+
+/* Default env settings */
+#define CONFIG_EXTRA_ENV_SETTINGS \
+	"hostname=etamin\0" \
+	"ubi_off=4096\0"\
+	"nand_img_size=0x400000\0" \
+	"optargs=\0" \
+	"preboot=draco_led 0\0" \
+	CONFIG_ENV_SETTINGS_BUTTONS_AND_LEDS \
+	CONFIG_ENV_SETTINGS_V2 \
+	CONFIG_ENV_SETTINGS_NAND_V2
+
+#ifndef CONFIG_RESTORE_FLASH
+
+#define CONFIG_BOOTCOMMAND \
+"if dfubutton; then " \
+	"run dfu_start; " \
+	"reset; " \
+"fi;" \
+"run nand_boot;" \
+"run nand_boot_backup;" \
+"reset;"
+
+
+#else
+#define CONFIG_BOOTCOMMAND			\
+	"setenv autoload no; "			\
+	"dhcp; "				\
+	"if tftp 80000000 debrick.scr; then "	\
+		"source 80000000; "		\
+	"fi"
+#endif
+#endif	/* CONFIG_SPL_BUILD */
+#endif	/* ! __CONFIG_ETAMIN_H */

include/configs/pxm2.h

@@ -61,6 +61,7 @@
 /* Default env settings */
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"hostname=pxm2\0" \
+	"ubi_off=2048\0"\
 	"nand_img_size=0x500000\0" \
 	"optargs=\0" \
 	"preboot=draco_led 0\0" \

include/configs/rastaban.h

@@ -76,6 +76,7 @@
 /* Default env settings */
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"hostname=rastaban\0" \
+	"ubi_off=2048\0"\
 	"nand_img_size=0x400000\0" \
 	"optargs=\0" \
 	"preboot=draco_led 0\0" \

include/configs/rut.h

@@ -56,6 +56,7 @@
 /* Default env settings */
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"hostname=rut\0" \
+	"ubi_off=2048\0"\
 	"nand_img_size=0x500000\0" \
 	"splashpos=m,m\0" \
 	"optargs=fixrtc --no-log consoleblank=0 \0" \

include/configs/siemens-am33x-common.h

@@ -159,6 +159,7 @@
 #define CONFIG_SPL_NAND_BASE
 #define CONFIG_SPL_NAND_DRIVERS
 #define CONFIG_SPL_NAND_ECC
+#define CONFIG_SYS_NAND_ONFI_DETECTION
 #define CONFIG_SYS_NAND_5_ADDR_CYCLE
 #define CONFIG_SYS_NAND_PAGE_COUNT	(CONFIG_SYS_NAND_BLOCK_SIZE / \
 					 CONFIG_SYS_NAND_PAGE_SIZE)
@@ -421,7 +422,7 @@
 			"setenv nand_src_addr ${nand_src_addr_B};" \
 		"fi;" \
 		"setenv nand_root ubi0:${nand_active_ubi_vol} rw " \
-		"ubi.mtd=9,2048;" \
+		"ubi.mtd=9,${ubi_off};" \
 		"setenv bootargs ${bootargs} " \
 		"root=${nand_root} noinitrd ${mtdparts} " \
 		"rootfstype=${nand_root_fs_type} ip=${ip_method} " \
@@ -513,7 +514,7 @@
 	COMMON_ENV_DFU_ARGS \
 		"dfu_alt_info=" DFU_ALT_INFO_NAND_V2 "\0" \
 	COMMON_ENV_NAND_BOOT \
-		"ubi part rootfs 2048;" \
+		"ubi part rootfs ${ubi_off};" \
 		"ubifsmount ubi0:${nand_active_ubi_vol};" \
 		"ubifsload ${kloadaddr} boot/${kernel_name};" \
 		"ubifsload ${loadaddr} boot/${dtb_name}.dtb;" \

include/configs/thuban.h

@@ -69,6 +69,7 @@
 /* Default env settings */
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"hostname=thuban\0" \
+	"ubi_off=2048\0"\
 	"nand_img_size=0x400000\0" \
 	"optargs=\0" \
 	"preboot=draco_led 0\0" \