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| author | Tom Rini <[email protected]> | 2022-01-27 14:14:47 -0500 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2022-01-27 14:14:47 -0500 |
| commit | 761a1786e125ce0e2f472f25f2b841d5f4e2f0cb (patch) | |
| tree | 39f5349498ded95ab427bbde2dd8ff2f633303de /doc/develop/devicetree | |
| parent | 9a1dd6dcfefc56c05ee7f7249faaa97c5f937fbc (diff) | |
| parent | 2d2384bbaff0ab84c868b553c74048a5f6acc9e3 (diff) | |
Merge tag 'dm-pull-26jan22' of https://source.denx.de/u-boot/custodians/u-boot-dm
acpi refactoring to allow non-x86 use
binman support for bintools (binary tools)
minor tools improvements in preparation for FDT signing
various minor fixes and improvements
Diffstat (limited to 'doc/develop/devicetree')
| -rw-r--r-- | doc/develop/devicetree/control.rst | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/doc/develop/devicetree/control.rst b/doc/develop/devicetree/control.rst index 0e6f85d5af1..c71570d64b4 100644 --- a/doc/develop/devicetree/control.rst +++ b/doc/develop/devicetree/control.rst @@ -182,6 +182,24 @@ main file, in this order:: Only one of these is selected but of course you can #include another one within that file, to create a hierarchy of shared files. + +External .dtsi fragments +------------------------ + +Apart from describing the hardware present, U-Boot also uses its +control dtb for various configuration purposes. For example, the +public key(s) used for Verified Boot are embedded in a specific format +in a /signature node. + +As mentioned above, the U-Boot build system automatically includes a +`*-u-boot.dtsi` file, if found, containing U-Boot specific +quirks. However, some data, such as the mentioned public keys, are not +appropriate for upstream U-Boot but are better kept and maintained +outside the U-Boot repository. You can use CONFIG_DEVICE_TREE_INCLUDES +to specify a list of .dtsi files that will also be included when +building .dtb files. + + Relocation, SPL and TPL ----------------------- |