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Tom Rini 448e2b6327 event: Correct dependencies on the EVENT framework 
The event framework is just that, a framework. Enabling it by itself
does nothing, so we shouldn't ask the user about it. Reword (and correct
typos) around this the option and help text. This also applies to
DM_EVENT and EVENT_DYNAMIC. Only EVENT_DEBUG and CMD_EVENT should be
visible to the user to select, when EVENT is selected.

With this, it's time to address the larger problems. When functionality
uses events, typically via EVENT_SPY, the appropriate framework then
must be select'd and NOT imply'd. As the functionality will cease to
work (and so, platforms will fail to boot) this is non-optional and
where select is appropriate. Audit the current users of EVENT_SPY to
have a more fine-grained approach to select'ing the framework where
used. Also ensure the current users of event_register and also select
EVENT_DYNAMIC.

Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reported-by: Oliver Graute <Oliver.Graute@kococonnector.com>
Reported-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Fixes: 7fe32b3442 ("event: Convert arch_cpu_init_dm() to use events")
Fixes: 42fdcebf85 ("event: Convert misc_init_f() to use events")
Fixes: c5ef202557 ("dm: fix DM_EVENT dependencies")
Signed-off-by: Tom Rini <trini@konsulko.com>
Tested-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Fabio Estevam <festevam@denx.de>
2023-01-18 12:46:13 -05:00
..
common global: Move remaining CONFIG_SYS_* to CFG_SYS_* 2022-12-05 16:06:08 -05:00
km83xx global: Migrate CONFIG_TESTPIN_REG to CFG 2022-12-23 10:15:12 -05:00
kmcent2 global: Migrate CONFIG_ENV_TOTAL_SIZE to CFG 2022-12-23 10:08:35 -05:00
pg-wcom-ls102xa board/km: move ls102xa boards to environment text files 2022-12-12 16:47:21 -05:00
scripts board/km: remove kirkwood boards 2022-10-06 10:13:38 +02:00
secu1 board/km/secu: migrate to use environment text files 2022-12-12 16:49:25 -05:00
Kconfig event: Correct dependencies on the EVENT framework 2023-01-18 12:46:13 -05:00
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.