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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

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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