i.MX Processors中的主题 Re: Fusing MAC address for MX8MP

Fusing MAC address for MX8MP

khang_letruong — Tue, 22 Jun 2021 03:54:48 GMT

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

Re: Fusing MAC address for MX8MP

b36401 — Tue, 22 Jun 2021 05:39:38 GMT

Please check MAC fuse lock bit.

Re: Fusing MAC address for MX8MP

khang_letruong — Wed, 30 Jun 2021 01:56:36 GMT

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

Re: Fusing MAC address for MX8MP

b36401 — Fri, 20 Aug 2021 07:42:49 GMT

Yes, fuse locks are shared between MAC addresses.