Hi Simon,
On Tue, 26 Dec 2023 at 04:48, Simon Glass sjg@chromium.org wrote:
Hi Raymond,
On Fri, Dec 22, 2023 at 9:32 PM Raymond Mao raymond.mao@linaro.org wrote:
Update the document and Kconfig to describe the behavior of board specific custom functions when CONFIG_OF_BOARD is defined.
Signed-off-by: Raymond Mao raymond.mao@linaro.org
doc/develop/devicetree/control.rst | 6 +++--- dts/Kconfig | 7 +++++-- 2 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/doc/develop/devicetree/control.rst
b/doc/develop/devicetree/control.rst
index cbb65c9b17..e061f4e812 100644 --- a/doc/develop/devicetree/control.rst +++ b/doc/develop/devicetree/control.rst @@ -104,9 +104,9 @@ in u-boot.bin so you can still just flash u-boot.bin
onto your board. If you are
using CONFIG_SPL_FRAMEWORK, then u-boot.img will be built to include
the device
tree binary.
-If CONFIG_OF_BOARD is defined, a board-specific routine will provide the -devicetree at runtime, for example if an earlier bootloader stage
creates
-it and passes it to U-Boot. +If CONFIG_OF_BOARD is defined, board-specific routines will provide the +bloblist and devicetree at runtime, for example if an earlier
bootloader stage
+creates it and passes it to U-Boot.
If CONFIG_SANDBOX is defined, then it will be read from a file on startup. Use the -d flag to U-Boot to specify the file to read, -D for
the
diff --git a/dts/Kconfig b/dts/Kconfig index 00c0aeff89..12d61dc748 100644 --- a/dts/Kconfig +++ b/dts/Kconfig @@ -110,8 +110,11 @@ config OF_BOARD default y if SANDBOX || OF_HAS_PRIOR_STAGE help If this option is enabled, the device tree is provided at
runtime by
a custom function called board_fdt_blob_setup(). The board mustimplement this function if it wishes to provide specialbehaviour.
a custom function called board_fdt_blob_setup().If this option is enabled, bloblist is provided at runtime by acustom function called board_bloblist_from_boot_arg().The board must implement these functions if it wishes toprovide
special behaviour.Again, this spec is not board-specific, so it should work on any ARM board, without board-specific code, just by enabling the feature.
dts/Kconfig is for all platforms. And from the view of a non-ARM platform,
this is still platform-specific.
[...]
Regards, Raymond