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Question asked by Kazuma Sasaki on Apr 12, 2019
Latest reply on Apr 22, 2019 by Kazuma Sasaki


I would like to enable the FIELD_RETURN_LOCK bit in OCOTP_SW_STICKY register.

IMX6DQ6SDLSRM described it is set to always enable for protecting FIELD_RETURN fuse.

But, When I check OCOTP_SW_STICKY register, FIELD_RETURN_LOCK bit is always 0b.

I think that FIELD_RETURN_LOCK is disabling at my test environment.

How do I set to FIELD_RETURN_LOCK to 1b = enable?



My test environment :

   Board SABRE-AI CPU2

   SoC i.MX6DL

 BSP Linux 4.1.15_2.0.0_ga


My test result :

(1) OCOTP_SW_STICKY register read from U-boot prompt.

=> md.l 0x21bC050 1
021bc050: 00000018


(2) Add below line to DCD table in U-boot source code. I could not get any log from debug console after this modification.

DATA 4 0x021bc050 0x00000004


Best Regards,

Kazuma Sasaki.