IMX6 high assure boot problem

[jiejia]

According to "How-to enable HAB in i.MX6.pdf", I generate the u-boot-signed-pad.bin

Now, I need to burn the chip e-fuse to enable HAB boot.

  cd /sys/fsl_otp

  echo 0xxxxxxxxx > HW_OCOTP_SRK0

  echo 0xxxxxxxxx > HW_OCOTP_SRK1

  echo 0xxxxxxxxx > HW_OCOTP_SRK2

  echo 0xxxxxxxxx > HW_OCOTP_SRK3

  echo 0xxxxxxxxx > HW_OCOTP_SRK4

  echo 0xxxxxxxxx > HW_OCOTP_SRK5

  echo 0xxxxxxxxx > HW_OCOTP_SRK6

  echo 0xxxxxxxxx > HW_OCOTP_SRK7

  echo 0x00040000 > HW_OCOTP_MEM0

  echo 0x02 > HW_OCOTP_CFG5

However, when I exe the command:

cat /sys/fsl_otp/HW_OCOTP_MEM0

0xc0

What should I do about the HW_OCOTP_MEM0? 

I try to burn 0x00040000 to HW_OCOTP_MEM0, and I can't see anything in the console after reboot.

[Yuri]

Hello,

HW_OCOTP_MEM0 is used to access RNG_TRIM. Please use

section 3.3.2 (RNG Trim fuses) of app note AN4581 for more details

how to treat with it.

http://cache.freescale.com/files/32bit/doc/app_note/AN4581.pdf

Have a great day,
Yuri

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