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board: add missing readme for bsp overview + rebuild

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Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
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Joachim Wiberg
2026-01-24 18:08:32 +01:00
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commit 5f737ed145
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board/README.md
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Board Support
=============
The board support for an architecture always starts with Qemu support,
this is what each `linux_defconfig` at the very least sets up. Then
each `$BR2_ARCH` has additional BSPs, e.g., Banana Pi BPI-R3.
The `board/` directory is matched with the `configs/*_defconfigs` and
the only execption is `board/common/`, which holds all shared files for
Infix builds.
Each `board/$BR2_ARCH/` can then have vendor/product sub-directories
for the BSPs which may contain "fixups" to the base kernel config and
any additional device tree files that should be included as well.
To rebuild a board-specific package, e.g. NanoPi R2S:
make friendlyarm-nanopi-r2s-rebuild all