upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/include/configs/o2mnt.h

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/*
* (C) Copyright 2012
* DENX Software Engineering, Anatolij Gustschin <agust@denx.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*/
/*
* Valid values for CONFIG_SYS_TEXT_BASE are:
* 0xFF000000 boot low boot high (standard configuration)
* 0x00100000 boot from RAM (for testing only)
*/
#ifndef CONFIG_SYS_TEXT_BASE
#define CONFIG_SYS_TEXT_BASE 0xff000000 /* Standard: boot low */
#endif
/* Board specific flash config */
#define CONFIG_SYS_FLASH_BASE 0xff000000
#define CONFIG_SYS_FLASH_SIZE 0x01000000 /* maximum 16MB */
/* max number of sectors on one chip */
#define CONFIG_SYS_MAX_FLASH_SECT 128
/*
* Include common defines for all ifm boards
*/
#include "o2dnt-common.h"
/* GPIO configuration */
#define CONFIG_SYS_GPS_PORT_CONFIG 0x00002004 /* no CAN */
/* Other board specific configs */
#define CONFIG_NETCONSOLE
#define CONFIG_SYS_BOOTCS_CFG 0x00087801
#define CONFIG_SYS_RESET_ADDRESS 0xff000000
#define CONFIG_SYS_MEMTEST_START 0x00100000 /* memtest works on */
#define CONFIG_SYS_MEMTEST_END 0x03f00000 /* 1 - 63 MB in DRAM */
#define CONFIG_BOARD_NAME "o2mnt"
#define CONFIG_BOARD_BOOTCMD "${newcmd}"
#define CONFIG_BOARD_MEM_LIMIT xstr(62)
#define BOARD_POST_CRC32_END xstr(0x01000000)
#ifndef CONFIG_IFM_SENSOR_TYPE
#define CONFIG_IFM_SENSOR_TYPE "O2M110"
#endif
#define CONFIG_EXTRA_ENV_SETTINGS \
CONFIG_IFM_DEFAULT_ENV_SETTINGS \
CONFIG_IFM_DEFAULT_ENV_OLD \
CONFIG_IFM_DEFAULT_ENV_NEW \
"linbot=ff060000\0" \
"lintop=ff25ffff\0" \
"rambot=ff260000\0" \
"ramtop=ffc5ffff\0" \
"jffbot=ffc60000\0" \
"jfftop=ffffffff\0" \
"ubobot=" xstr(CONFIG_SYS_FLASH_BASE) "\0" \
"ubotop=ff03ffff\0" \
"kernel_addr=0xff060000\0" \
"ramdisk_addr=0xff260000\0" \
"newcmd=run scrprot;run flash_ext2\0" \
"scrprot=protect on ${linbot} ${lintop};protect on ${rambot} " \
"${ramtop}\0" \
"flash_ext2=run ext2args addip addmem;bootm ${kernel_addr}\0" \
"ext2args=setenv bootargs root=/dev/mtdblock3 ro " \
"rootfstype=ext2\0" \
"pwm=mw f0000674 0x10006;mw f0000678 0x30000;" \
"mw f0000678 0x30001;mw f0000670 0x3\0" \
"master=mw f0000b00 0x00052006;mw f0000b0c $(IOpin);" \
"mw f0000b04 $(IOpin);mw f0000b10 0x24;run pwm\0" \
"sensortyp="CONFIG_IFM_SENSOR_TYPE"\0" \
"srelease=0.00\0"