diff options
| author | Alex Deymo <deymo@google.com> | 2017-04-02 01:25:20 -0700 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2017-05-09 20:35:06 -0400 |
| commit | 82f766d1d2c580a29bed340ea4dd9fa1b8ff05e0 (patch) | |
| tree | 81c70f6e469d4431d3852e2d6fe43443fff6ad5a /dts | |
| parent | 45a6d231b2f9b891a7df517fc40b8466e12f2b57 (diff) | |
Allow boards to initialize the DT at runtime.
In some boards like the Raspberry Pi the initial bootloader will pass
a DT to the kernel. When using U-Boot as such kernel, the board code in
U-Boot should be able to provide U-Boot with this, already assembled
device tree blob.
This patch introduces a new config option CONFIG_OF_BOARD to use instead
of CONFIG_OF_EMBED or CONFIG_OF_SEPARATE which will initialize the DT
from a board-specific funtion instead of bundling one with U-Boot or as
a separated file. This allows boards like the Raspberry Pi to reuse the
device tree passed from the bootcode.bin and start.elf firmware
files, including the run-time selected device tree overlays.
Signed-off-by: Alex Deymo <deymo@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'dts')
| -rw-r--r-- | dts/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/dts/Kconfig b/dts/Kconfig index 6fe7a5bc08..9a0622154a 100644 --- a/dts/Kconfig +++ b/dts/Kconfig @@ -51,6 +51,14 @@ config OF_EMBED and development only and is not recommended for production devices. Boards in the mainline U-Boot tree should not use it. +config OF_BOARD + bool "Provided by the board at runtime" + depends on !SANDBOX + help + If this option is enabled, the device tree will be provided by + the board at runtime if the board supports it, instead of being + bundled with the image. + config OF_HOSTFILE bool "Host filed DTB for DT control" depends on SANDBOX |