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Tom Rini b7fbdc55c7 Convert CONFIG_HUSH_INIT_VAR to Kconfig 
This converts the following to Kconfig:
   CONFIG_HUSH_INIT_VAR

Signed-off-by: Tom Rini <trini@konsulko.com>
2022-06-06 12:09:00 -04:00
..
common kmtegr1: Drop CONFIG_KMTEGR1 2022-04-01 10:28:46 -04:00
km83xx board/km: update MAINTAINERS files 2021-10-14 19:45:07 -04:00
km_arm Convert CONFIG_KM_COGE5UN et al to Kconfig 2022-04-01 10:28:46 -04:00
kmcent2 event: Convert misc_init_f() to use events 2022-03-10 08:28:36 -05:00
pg-wcom-ls102xa event: Convert misc_init_f() to use events 2022-03-10 08:28:36 -05:00
scripts km/scripts: fix saveenv command syntax 2021-06-17 11:46:11 +05:30
secu1 board/km: update MAINTAINERS files 2021-10-14 19:45:07 -04:00
Kconfig Convert CONFIG_HUSH_INIT_VAR to Kconfig 2022-06-06 12:09:00 -04:00
README km: common: implement field fail-safe u-boot update 2022-02-01 15:08:07 +05:30

README

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Field Fail-Save U-boot Update
-----------------------------
Field Fail-Save u-boot update is a feature that allows save u-boot update
of FOX and XMC products that are rolled out in the field.

The feature is initially implemented for designs based on LS102x SoC, but in
theory can be used on all designs that are booting from parallel NOR flash.

The implementation expects redundant (secondary) u-boot image on a predefined
location in the NOR flash, u-boot execution will be transferred to the redundant 
(secondary) u-boot and redundant u-boot will be started if 'updateduboot' envvar
is set to 'yes'.
Update logic check_for_uboot_update() has to be invoked from the design early
before relocation just after SoC initialization, e.g from board_early_init_f or
misc_init_f functions.
By design it is expected that primary u-boot image is burned in the factory and
never updated, and in case u-boot update is required it can flashed and started
from secondary u-boot location.