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| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2022-10-17 09:09:55 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2022-10-27 11:13:29 +0200 |
| commit | 1c33083a1542db3ea596481781170123f0d0510f (patch) | |
| tree | 343fb3b2c38f2567604c6b2da06e6f342af207e6 /Documentation/user | |
| parent | 21dda946e7aa86246bf7ca22fb1a1609407c4bb9 (diff) | |
| download | barebox-1c33083a1542db3ea596481781170123f0d0510f.tar.gz barebox-1c33083a1542db3ea596481781170123f0d0510f.tar.xz | |
restart: add reset -w for warm bootrom reset
We currently support reboot mode communication with BootROMs of the
i.MX6Q/DL, i.MX8MM and STM32MP15x. For each of these, the user must
take care to use the correct reset as the highest priority reset often
clears the non-volatile register mapped by the syscon holding the reboot
mode. As we only have one BootROM, we can improve usability by adding a
global flag that describes whether a restart handler is suitable for
use after a bootrom reboot mode write. Add a flag bit describing this
and allow populating it from the device tree as well as from drivers.
Existing i.MX/STM32 drivers will be moved onto this in follow-up
commits.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20221017071000.1458292-4-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'Documentation/user')
| -rw-r--r-- | Documentation/user/reboot-mode.rst | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/user/reboot-mode.rst b/Documentation/user/reboot-mode.rst index 83d4136b85..1929a67e0b 100644 --- a/Documentation/user/reboot-mode.rst +++ b/Documentation/user/reboot-mode.rst @@ -47,7 +47,9 @@ Reboot mode providers have priorities. The provider with the highest priority has its parameters aliased as ``$global.system.reboot_mode.prev`` and ``$global.system.reboot_mode.next``. After executing the init scripts, barebox startup will ``source /env/bmode/${global.system.reboot_mode.prev}`` -if available. +if available. Example usage:: + + gpr.reboot_mode=serial reset -w Reset ===== @@ -60,6 +62,9 @@ If such reboot mode storage is used, users must take care to use the correct reset provider. In barebox, multiple reset providers may co-exist. The ``reset`` command allows listing and choosing a specific reboot mode. +For communication with the SoC's BootROM, a warm reset can be triggered +with ``reset -w`` if a suitable reset handler has been registered. + Disambiguation ============== |