We try to boot via a SPI flash (MT25QL128ABA) connected to ECSPI2.
The flash memory is up and running in Linux, where we can read/write.
We write the bootloader (same as we use for SD card) to offset 0x400 of the flash.
When we configure the boot switches (SW110{1.2}) to boot via ECSPI2, power on,
and measure the SPI bus, we see traffic. But is looks like the boot stops.
If we erase the SPI flash or write something other than a valid bootloader to
offset 0x400 and try to boot, we also see some traffic on the SPI bus, but the
board boots via SD card.
There are some other posts, where similar questions are asked:
https://community.nxp.com/t5/i-MX-Processors/Boot-from-SPI-NOR-on-iMX-8M-Mini/m-p/1276815
https://community.nxp.com/t5/i-MX-Processors/i-MX8M-Mini-doesn-t-boot-from-SPI-NOR/td-p/912201
