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kconfig: Don't USE_DT_CODE_PARTITION if there isn't one

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Previously, if there was no `zephyr,code-partition` chosen DT node, then
enabling CONFIG_USE_DT_CODE_PARTITION would make all of flash available
to the linker, with no immediate indication of that to the user.

To avoid this discrepancy, make the USE_DT_CODE_PARTITION Kconfig symbol
depend on that chosen node being present. For the sake of verbosity, add
a dedicated symbol to describe this: HAS_DT_CODE_PARTITION.

An additional benefit is that certain platforms or applications can now
use `select USE_DT_CODE_PARTITION` to signal `zephyr,code-partition` as
a hard requirement, by failing the build whenever the node is missing.

Signed-off-by: Grzegorz Swiderski <grzegorz.swiderski@nordicsemi.no>
This commit is contained in:
Grzegorz Swiderski 2025-01-13 08:34:50 +01:00 • committed by Benjamin Cabé
commit 1440f5c19c
1 changed files with 10 additions and 3 deletions
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13
Kconfig.zephyr
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@ -88,17 +88,24 @@ config HAS_FLASH_LOAD_OFFSET
if HAS_FLASH_LOAD_OFFSET if HAS_FLASH_LOAD_OFFSET
# Workaround for not being able to have commas in macro arguments
DT_CHOSEN_Z_CODE_PARTITION := zephyr,code-partition
config HAS_DT_CODE_PARTITION
def_bool "$(dt_chosen_path,$(DT_CHOSEN_Z_CODE_PARTITION))" != ""
help
Symbol that indicates whether the "zephyr,code-partition"
chosen property is set. Other settings may depend on it.
config USE_DT_CODE_PARTITION config USE_DT_CODE_PARTITION
bool "Link application into /chosen/zephyr,code-partition from devicetree" bool "Link application into /chosen/zephyr,code-partition from devicetree"
depends on HAS_DT_CODE_PARTITION
help help
When enabled, the application will be linked into the flash partition When enabled, the application will be linked into the flash partition
selected by the zephyr,code-partition property in /chosen in devicetree. selected by the zephyr,code-partition property in /chosen in devicetree.
When this is disabled, the flash load offset and size can be set manually When this is disabled, the flash load offset and size can be set manually
below. below.
# Workaround for not being able to have commas in macro arguments
DT_CHOSEN_Z_CODE_PARTITION := zephyr,code-partition
config FLASH_LOAD_OFFSET config FLASH_LOAD_OFFSET
# Only user-configurable when USE_DT_CODE_PARTITION is disabled # Only user-configurable when USE_DT_CODE_PARTITION is disabled
hex "Kernel load offset" if !USE_DT_CODE_PARTITION hex "Kernel load offset" if !USE_DT_CODE_PARTITION