I work on a imx287 custom board. I build a working updater_ivt.sb starting from kernel 2.6.35_3.
Some boards have problems and i ask me if the updater can help me to investigate.
On updater start i can read from DUART, before "Uncompressing" a series of letters ( when all goes right i read: LLLLLLLFLCLFLLJ).
On some boards this sequence differ or is shorter, but i'm not capable to find in source code where letters are printed.
So someone can explain this or help me to find in source code?