esp-idf/components/efuse/Kconfig

menu "eFuse Bit Manager"

    config EFUSE_CUSTOM_TABLE
        bool "Use custom eFuse table"
        default n
        help
            Allows to generate a structure for eFuse from the CSV file.

    config EFUSE_CUSTOM_TABLE_FILENAME
        string "Custom eFuse CSV file"
        depends on EFUSE_CUSTOM_TABLE
        default "main/esp_efuse_custom_table.csv"
        help
            Name of the custom eFuse CSV filename. This path is evaluated
            relative to the project root directory.

    config EFUSE_VIRTUAL
        bool "Simulate eFuse operations in RAM"
        default n
        help
            If "n" - No virtual mode. All eFuse operations are real and use eFuse registers.
            If "y" - The virtual mode is enabled and all eFuse operations (read and write) are redirected
            to RAM instead of eFuse registers, all permanent changes (via eFuse) are disabled.
            Log output will state changes that would be applied, but they will not be.

            If it is "y", then SECURE_FLASH_ENCRYPTION_MODE_RELEASE cannot be used.
            Because the EFUSE VIRT mode is for testing only.

            During startup, the eFuses are copied into RAM. This mode is useful for fast tests.

    config EFUSE_VIRTUAL_KEEP_IN_FLASH
        bool "Keep eFuses in flash"
        depends on EFUSE_VIRTUAL
        help
            In addition to the "Simulate eFuse operations in RAM" option, this option just adds
            a feature to keep eFuses after reboots in flash memory. To use this mode the partition_table
            should have the `efuse` partition. partition.csv: "efuse_em, data, efuse,   ,   0x2000,"

            During startup, the eFuses are copied from flash or,
            in case if flash is empty, from real eFuse to RAM and then update flash.
            This mode is useful when need to keep changes after reboot
            (testing secure_boot and flash_encryption).

    config EFUSE_VIRTUAL_LOG_ALL_WRITES
        bool "Log all virtual writes"
        depends on EFUSE_VIRTUAL
        help
            If enabled, log efuse burns. This shows changes that would be made.

    choice EFUSE_CODE_SCHEME_SELECTOR
        prompt "Coding Scheme Compatibility"
        default EFUSE_CODE_SCHEME_COMPAT_3_4
        depends on IDF_TARGET_ESP32
        help
            Selector eFuse code scheme.

        config EFUSE_CODE_SCHEME_COMPAT_NONE
            bool "None Only"
        config EFUSE_CODE_SCHEME_COMPAT_3_4
            bool "3/4 and None"
        config EFUSE_CODE_SCHEME_COMPAT_REPEAT
            bool "Repeat, 3/4 and None (common table does not support it)"
    endchoice

    config EFUSE_MAX_BLK_LEN
        int
        default 256 if EFUSE_CODE_SCHEME_COMPAT_NONE
        default 192 if EFUSE_CODE_SCHEME_COMPAT_3_4
        default 128 if EFUSE_CODE_SCHEME_COMPAT_REPEAT
        default 256 if !IDF_TARGET_ESP32

endmenu