Hi Javier,
According to the help text, you can set negative offsets to indicated
that the offset is relative to the end of the parition. But kconfig
doesn't let you specify negative hex values. I think this fell through
the cracks when converting the symbol from a '#define' to a kconfig
option.
Not sure with u-boot upstream master, but with a downstream NXP-based
tree (version v2024.04) I think it just works with something like:
ccimx91-dvk_defconfig:CONFIG_ENV_OFFSET=0xFFFFFFFFFFFFC000
ccimx91-dvk_defconfig:CONFIG_ENV_OFFSET_REDUND=0xFFFFFFFFFFFFC000
ccimx93-dvk_defconfig:CONFIG_ENV_OFFSET=0xFFFFFFFFFFFFC000
ccimx93-dvk_defconfig:CONFIG_ENV_OFFSET_REDUND=0xFFFFFFFFFFFFC000
Yeah, but I wouldn't call that very user friendly if you have to
convert the offset the two's complement representation yourself.
After all, the symbol gets translated to a signed s64 variable.
Also I've just noticed, that env/sf.c uses ulong to store ENV_OFFSET.
-michael
