I’ve tried to enable the fast boot on my Colibri imx6ull eMMC by programming the fuse as written in Linux- Booting so I’ve sent the command
fuse prog 0 5 0x00005072
Before sending the command the fuse value was 0x00000090 and after the comand I’m reading 0x000050f2.
Now when I boot the screen turn on then off and then nothing seems to happen, I guess it’s bricked, but there is any way to solve this?
Hello @gb20 ,
Unfortunately, this process is (mostly) irreversible. This is the explanation ( taken from the NXP forum)
In more details, eFuses are the One Time Programmable (OTP) bits, their value of 0 corresponds to default (intact) state, 1 corresponds to blown state. So, you can blow the OTP bit from 0 to 1 only once, but never can revert it back from 1 to 0. So, if a fuse that shall be blown was not for some reason, you can go back and try to blow it once again at any time, but if a fuse was blown just by mistake, you can never revert it back.