[PATCH 0/2] Implement recovery boot detection for SPI flash

[Fabian Pfitzner <f.pfitzner@pengutronix.de>]

As of now, there is only the boot rom log on i.MX processors that give us
information on whether we have booted from the primary or recovery image.

Extract this information into a Barebox variable in order to pass this
information to user space. This is useful for tools such as RAUC, that
rely on that information when updating the bootloader atomically.

The variable is called `bootsource_instance_index`.
The intention behind the name is, that for an instance we can have
multiple boot images, where the primary is depicted as zero, and the
recovery/secondary is depicted as a 1.

There is no implementation on how to pass this information to user
space. This could be implemented by a boot script that interprets
the content of that variable into a human readable format.

Successfully tested on the congatec-qmx8p.

Signed-off-by: Fabian Pfitzner <f.pfitzner@pengutronix.de>
---
Fabian Pfitzner (2):
      bootsource: add bootsource instance index variable
      arch: arm: imx: detect secondary boot

 Documentation/user/variables.rst |  1 +
 arch/arm/mach-imx/boot.c         | 52 ++++++++++++++++++++++++++++++++++++++++
 common/bootsource.c              | 20 ++++++++++++++++
 include/bootsource.h             | 11 +++++++++
 4 files changed, 84 insertions(+)
---
base-commit: 1806d0f4835a1217a298f82fa2fc88b2694380f2
change-id: 20260518-fpf-bootsource-instance-index-a7bb108392a3

Best regards,
-- 
Fabian Pfitzner <f.pfitzner@pengutronix.de>