tree a3ec1cec885e4c84d27efb7e2ec9cb33b5087704
parent b2ceff9b183be5c3b4debc3d9af7e8127d58b46b
author Marek Vasut <marex@denx.de> 1664383504 +0200
committer Jagan Teki <jagan@edgeble.ai> 1666673253 +0530

cmd: sf: Handle unaligned 'update' start offset

Currently the 'sf update' command fails in case the 'start' offset is
not aligned to SPI NOR erase block size. Add the missing alignment
calculation. In case the start offset is in the middle of erase block,
round start address down to the nearest aligned one, compare only the
updated data between what is in the SPI NOR and what is being written,
copy new data at offset of the compare buffer, and write back the entire
erase block.

This is useful e.g. on i.MX6Q where the u-boot-with-spl.imx is at
offset 0x400 in the SPI NOR, while the SPI NOR may have erase block
size e.g. 0x1000 bytes.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>