One-time programmable (OTP)

Note This section contains Linux BSP documentation for kernel v4.1. Click here for v4.9 BSP documentation.

The NXP i.MX6UL CPU provides a set of one-time programmable bits (eFuses) structured as 16 banks. Each bank is composed of eight words of 32 bits each.

CAUTION! These bits can be blown just once. Programming them is an irreversible operation.

Kernel configuration	CONFIG_FSL_OTP
Kernel driver	drivers/char/fsl_otp.c

The different OTP words are accessible through the sysfs at /sys/fsl_otp.