I work with the i.MX6 SoloX SABRE-SDB and I need the M4 to boot much faster. I measure a time about 300 - 400 ms and i read it can be faster (System should be initialized after 11 ms).
The command 'run m4boot' is first at the u-boot environment variable bootcmd.
All I tried till now is the following:
in the File include/configs/mx6sxsabresd.h I undefined
all USB configs
But that didn't affect enought.
Maybe I could silent all output on serial while u-boot, but I tried and it didn't
work for all output.
I hope somebody has some experience with this and can help me.