i.MX6ULL read and write fusemap

[mannsikchung]

Dear All.

The addresses of fusemap are 0x400, ...., 0x450, 0x460, 0x470, 0x6D0, etc.

And, only part of 0x450 is accessable by H/W BOOT_CFG pins.

How to access 0x430[21:20] from software or bootloader?

"md" command of u-boot is usable?

I want to read current setting of 0x430[21:20], TAMPER_PIN_DISABLE.

And, I want to change 0x430[21:20]. How can I change it?

BR.

Mannsik

[keyur-mpc]

Have you found the solution?

[brenolima]

Hi mannsikchung‌,

You can use the fuse API in u-boot for reading and writing:

=> fuse read <bank> <word> [<cnt>]
=> fuse prog [-y] <bank> <word> <hexval>

You can find more details about it and a example in the following link: Burning eFuses on i.MX6 and i.MX7 - i.MXDev Blog 

Thanks,

Breno Lima

[art]

What exactly i.MX series processor do you mean? Please specify it first.

Best Regards,

Artur

[mannsikchung]

As the title says, I'm using i.MX6ULL.