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Linux/AM5748: Issue in booting from spi nor flash

Part Number: AM5748

Tool/software: Linux

Hi all,

In am5748 we are trying that the board get booted from spi nor flash and then kernel and filesystems to be loaded from emmc. fo I built MLO and u-boot and loaded them into spi flash at 0x0 and 0x40000 respectively, after loading these to files I removed the SD card and below error is showing. Kindly update me why this error us showing and also solution for this.

U-Boot SPL 2018.01 (Jan 24 2019 - 13:05:39)
DRA762-GP ES1.0 ABZ package
Trying to boot from SPI
Invalid bus 0 (err=-19)
SPI probe failed.
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###

Thank you

Deepak.H.M