FIELD_RETURN_LOCK enabling

[Kazuma_Sasaki]

Hi,

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?

From IMX6DQ6SDLSRM:

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.

[Yuri · Accepted solution]

Hello,

   I've sent You some information directly. Hope it helps.

Have a great day,
Yuri

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[Kazuma_Sasaki]

Hi Yuri,

I appreciate your support. My issue is solved by your advice.

Best Regards,

Kazuma Sasaki.

[mohamed-ali_fod]

Hello,

I have the same issue I read 021bc050: 00000018 so seems that FIELD_RETURN_LOCK is not set.

I flashed a signed u-boot but no more log is seen on console, could you please share me the solution?

Thanks,

Mohamed Ali