[U-Boot] imx7d spansion spi flash first sector

Hi

I'm trying to flash on a spansion spi flash connected on qspi on imx7d board.

SF: Detected S25FL128S_64K with page size 256 Bytes, erase size 64 KiB, total 16 MiB

I have some problem: - I can't erase the first sector - I don't know if

BOOT_FROM qspi BOOT_OFFSET FLASH_OFFSET_QSPI

I need to use those or the spi one. What is the correct procedure to flash on it?

Michael