Secure boot in imx8qxp

[krunaldhonde]

We are having custom board based on imx8qxp.

We have enabled following option in menu config.

 ARM architecture -> Support i.MX 8 AHAB features

 We are not able to write fuse in uboot. See below log.

=> fuse prog -y 0 730 0x1a2f7ab3
Programming bank 0 word 0x000002da to 0x1a2f7ab3...
Warning: Words in this index range have ECC protection
and can only be programmed once per word. Individual bit
operations will be rejected after the first one.

Really program this word? <y/N>
y
ERROR

Do we need to enable anything in u-boot ?

[joanxie]

refer to the warning, ECC protected words are automatically write locked after the first write operation

[joanxie]

you can use fuse read to check if you have already programmed or not

[krunaldhonde]

After first write only we get this error. it never worked for us.