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The kernel tree builds some "composite" DTBs, where the final DTB is the result of applying one or more DTB overlays on top of a base DTB with fdtoverlay. The FIT image specification already supports configurations having one base DTB and overlays applied on top. It is then up to the bootloader to apply said overlays and either use or pass on the final result. This allows the FIT image builder to reuse the same FDT images for multiple configurations, if such cases exist. The decomposition function depends on the kernel build system, reading back the .cmd files for the to-be-packaged DTB files to check for the fdtoverlay command being called. This will not work outside the kernel tree. The function is off by default to keep compatibility with possible existing users. To facilitate the decomposition and keep the code clean, the model and compatitble string extraction have been moved out of the output_dtb function. The FDT image description is replaced with the base file name of the included image. Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.