Honored Contributor
Honored ContributorHi,
I'm pretty sure this is because the U-Boot port on which this preloader is based upon does not fully support this flash. As seen in the datasheet, the bit EXTADD of the Bank Address Register is set to 0 by default, and this means that the FAST_READ (0Bh) command used by U-Boot expects to be followed by a 3-byte address, but since the device is > 16 MB, U-Boot automatically uses a 4-byte address! So the preloader copies garbage to the DDR, and then tries to run it, the watchdog is triggered, and so on... There is also a similar problem related to the Normal or Quad operation. The changes are not too difficult to implement, but actually Altera pushed last week a commit that adds this support! So, you can take a look at this commit, and see if it solves your problem: https://github.com/altera-opensource/u-boot-socfpga/commit/5a47f31c98e6c70185f3423bc82f3414cb25ca2c replace the spansion.c file with the spansion.c file present in above link I too faced this problem.my problem solved after replacing the file
