:orphan:

.. title:: CONFIG_TFM_MCUBOOT_IMAGE_NUMBER

.. kconfig:: CONFIG_TFM_MCUBOOT_IMAGE_NUMBER

CONFIG_TFM_MCUBOOT_IMAGE_NUMBER
###############################

*Granularity of FW updates of TFM and app*

Type: ``int``

Help
====

.. code-block:: none

    How many images the bootloader sees when it looks at TFM and the app.
    When this is 1, the S and NS are considered as 1 image and must be
    updated in one atomic operation. When this is 2, they are split and
    can be updated independently if dependency requirements are met.

Direct dependencies
===================

\ :kconfig:`TFM_BL2 <CONFIG_TFM_BL2>` && \ :kconfig:`BUILD_WITH_TFM <CONFIG_BUILD_WITH_TFM>` && 0

*(Includes any dependencies from ifs and menus.)*

Default
=======

- 2

Kconfig definition
==================



At ``<External Modules>/trusted-firmware-m/Kconfig.tfm:150``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:33`` → ``<External Modules>/Kconfig:74`` → ``<External Modules>/trusted-firmware-m/Kconfig:7``

Menu path: (Top) → Modules → Build with TF-M as the Secure Execution Environment → Add MCUboot to TFM

.. code-block:: kconfig

    config TFM_MCUBOOT_IMAGE_NUMBER
    	int "Granularity of FW updates of TFM and app"
    	range 1 2
    	default 2
    	depends on TFM_BL2 && BUILD_WITH_TFM && 0
    	help
    	  How many images the bootloader sees when it looks at TFM and the app.
    	  When this is 1, the S and NS are considered as 1 image and must be
    	  updated in one atomic operation. When this is 2, they are split and
    	  can be updated independently if dependency requirements are met.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*