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eFuse configuration in iMX7D sabresd reference board

Question asked by SANGILI KUMAR on Nov 7, 2017
Latest reply on Nov 8, 2017 by SANGILI KUMAR


I'm using iMX7D sabresd reference board.

When BOOT_MODE is 00b (SW2-00) board booting from SD card because eFuse boot configuration were already written so ROM code fetching boot loader from SD card.

I just want to read the efuse boot configuration from the board, so i tried in following way.

1. ==> fuse read 0x01 0x03 and the result is 0x0 same result for bank2,word0(BOOT_CFG1) and BOOT_CFG2, 3 and 4.

2. Then i tried from linux. 

     cat /sys/fsl_otp/HW_OCOTP_BOOT_CFG0 result is 0x0 and same for BOOT_CFG1,2,3 and 4.

How to read the efuse boot configuration data?