Fusing MAC address for MX8MP

[khang_letruong]

Dear Experts,

I would like to fuse the MAC address for our customized MX8MP based board. I found certain discussion about this subject such as the following : https://community.nxp.com/t5/i-MX-Processors/imx8m-plus-fuse/m-p/1270171. In this discussion, the author used : 

u-boot=> fuse prog -y 9 0 0xeeff

u-boot=> fuse prog -y 9 1 0xaabbccdd

but  I read back incorrect value. as below. 

Word 0x00000000: ffdfbfaf
u-boot=> fuse read 9 1
Reading bank 9:

Word 0x00000001: 072fffff

However, I wonder where to find reliable info about the bank number as well as bytes' order in word value, please ?

Thanks a lot and hope to hear from you,

Khang

[b36401]

Please check MAC fuse lock bit.

[khang_letruong]

Dear @b36401 ,

Thanks for your advice but it's still vague for me, especially in the case that I need to program the fuse of the 2nd Ethernet interface (EQoS, index 1) and the words reserved for MAC addresses seem to be shared btw the 2 MAC addresses.

Best regards,

Khang

[b36401 · Accepted solution]

Yes, fuse locks are shared between MAC addresses.