What is the OTPMK (OTP Master Key) and where do I find and generate it?
In "i.MX 6 Linux High Assurance Boot (HAB) User's Guide", after burning the SRK's using HW_OCOTP_SRK*, it says:
Burn OTPMK. These fuse values are necessary to enable the hardware secure logic in the chip.
echo 0x975b69a7 > HW_OCOTP_OTPMK0
echo 0xafae0b5d > HW_OCOTP_OTPMK1
echo 0x6f780499 > HW_OCOTP_OTPMK2
echo 0x3dda7a47 > HW_OCOTP_OTPMK3
echo 0x76fcba3c > HW_OCOTP_OTPMK4
echo 0x6d5c9ef6 > HW_OCOTP_OTPMK5
echo 0xb166b40a > HW_OCOTP_OTPMK6
echo 0x8f449c5d > HW_OCOTP_OTPMK7
I can't find any reference to OTPMK anywhere, including "Chapter 47: On-Chip OTP Controller (OCOTP_CTRL)" in the "i.MX 6Solo/6DualLite Applications Processor Reference Manual"