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doc/kconfig: mention possible intermediate CPU levels

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Such as CPU_LINES_<xxx> on STM32
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Alexandre Abadie 2020-09-29 15:48:47 +02:00
parent 0941867bf9
commit 2213b25f8f
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1 changed files with 3 additions and 1 deletions
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doc/doxygen/src/kconfig/kconfig.md
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@ -352,7 +352,9 @@ Features may be provided by any hierarchy symbol. Usually symbols are selected
from more specific to less specific. This means that a `CPU_MODEL_<model>`
symbol usually would select the correspondent `CPU_FAM_<family>` symbol,
which would in turn select the `CPU_CORE_<core>`. This may change in some cases
where `CPU_COMMON_` symbols are defined to avoid repetition.
where `CPU_COMMON_` symbols are defined to avoid repetition. For convenience and
if it makes sense within a CPU vendor family, it's also allowed to use
intermediate grouping levels, like `CPU_LINE_<xxx>` used for STM32.
In addition to the symbols of the hierarchy described above, a default value
to the `CPU` symbol should be assigned, which will match the value of the `CPU`