tree b4d6f06af81e5820699f62594f191c6da1eaaf5e
parent 7d6e2c54b7dd057f50bf0116c9e803e214dbe74c
author Sughosh Ganu <sughosh.ganu@linaro.org> 1666356360 +0530
committer Tom Rini <trini@konsulko.com> 1667242052 -0400

FWU: STM32MP1: Add support to read boot index from backup register

The FWU Multi Bank Update feature allows the platform to boot the
firmware images from one of the partitions(banks). The first stage
bootloader(fsbl) passes the value of the boot index, i.e. the bank
from which the firmware images were booted from to U-Boot. On the
STM32MP157C-DK2 board, this value is passed through one of the SoC's
backup register. Add a function to read the boot index value from the
backup register.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>