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Read Unique ID on i.MX7

Question asked by Adrian Sapio on Dec 15, 2017
Latest reply on Dec 29, 2017 by Adrian Sapio
Branched to a new discussion

Has anyone been able to read the 64-bit Unique ID of the i.MX7 from Linux?

 

I see the fusemap documentation in the i.MX7 Reference Manual. It's not clear to me what to do with that or how to access those registers.

In my linux distro:

1) There is no serial number in /cat/cpuinfo:

# cat /proc/cpuinfo | grep Serial
Serial : 0000000000000000

2) I see some HW_OCOTP files in /sys/fsl_otp, but its not clear what to do with them. 

 

Can anyone provide guidance or info on this? 

If I could read the Unique ID in uboot, that would be a good start also, but I just generally don't see any documentation anywhere at all as to how to do this. 

Thanks!

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