Library and tools for working with identification EEPROMs on NVIDIA Jetson/Tegra hardware, as documented in Jetson TX1-TX2 Module EEPROM Layout. Works with EEPROMs directly accessible through an EEPROM driver (for read/write access), or via userspace I2C transactions (for reads only).
This shared library implements functions for determining the SoC type and I2C address of the
SoC's module (CVM) EEPROM (the cvm API), functions for reading/writing an ID EEPROM (the
eeprom API), and a function for parsing the part number in the CVM EEPROM that is used
as a board specification for bootloader upgrades (the boardspec API).
This tool provides a CLI for getting (and setting) information in an identification EEPROM. It can be used interactively, using libedit to provide command editing and history, or in "one-shot" mode by specifying a single command on the comand line.
This tool displays the board specification that serves as the basis for determining compatibility of individual components in a bootloader update payload.
WARNING This package provides both read and write access to the EEPROMs. Use with caution.
For writing to the EEPROMs, you must have CONFIG_AT24 in your kernel configuration and an entry in the device tree for the eeprom. Direct eeprom writes using the I2C user-space driver have proven unreliable and are not supported.