Hi Kory, On Fri, 3 Oct 2025 at 10:34, Kory Maincent <[email protected]> wrote: > > This series converts the extension board framework to use UCLASS as > requested by Simon Glass, then adds extension support to pxe_utils > and bootmeth_efi (not tested) to enable extension boards devicetree load > in the standard boot process. > > The UCLASS implementation provides one driver that manages all > extension boards (alternative would be one U-Boot device per > extension board). Simon is that what you would expect?
I believe that allowing board-specific drivers is better, since some will want to check an EEPROM, some will use GPIO, etc. Also, for testing, we should have a driver for sandbox. Regards, Simon > > Signed-off-by: Kory Maincent <[email protected]> > --- > Kory Maincent (16): > MAINTAINERS: Add maintainer for extension board support > boot: Move extension board support from cmd/ to boot/ > boot: Add UCLASS support for extension boards > board: ti: Exclude cape detection from XPL builds > board: ti: Refactor cape detection code for readability > board: ti: Convert cape detection to use UCLASS framework > board: sunxi: Refactor CHIP board extension code > board: sunxi: Convert extension support to UCLASS framework > board: sandbox: Improve extension board scan implementation > board: sandbox: Convert extension support to UCLASS framework > board: compulab: Convert imx8mm-cl-iot-gate to UCLASS extension > framework > boot: Remove legacy extension board support > boot: extension: Move overlay apply custom logic to command level > boot: pxe_utils: Add extension board devicetree overlay support > boot: bootmeth_efi: Refactor distro_efi_try_bootflow_files return logic > boot: bootmeth_efi: Add extension board devicetree overlay support > > MAINTAINERS | 9 + > .../imx8mm-cl-iot-gate/imx8mm-cl-iot-gate.c | 60 ++++--- > board/sandbox/sandbox.c | 22 ++- > board/sunxi/chip.c | 33 ++-- > board/ti/common/Makefile | 2 + > board/ti/common/cape_detect.c | 52 +++--- > boot/Kconfig | 3 + > boot/Makefile | 1 + > boot/bootmeth_efi.c | 78 +++++++-- > boot/extension-uclass.c | 138 ++++++++++++++++ > boot/pxe_utils.c | 90 ++++++++++ > cmd/Kconfig | 5 +- > cmd/extension_board.c | 183 > ++++++++++----------- > doc/usage/cmd/extension.rst | 24 +-- > include/dm/uclass-id.h | 1 + > include/extension_board.h | 71 ++++++-- > 16 files changed, 544 insertions(+), 228 deletions(-) > --- > base-commit: 9710d98e8942151fc0c62d54100d9d27e8263d04 > change-id: 20250916-feature_sysboot_extension_board-958dd0072565 > > Best regards, > -- > Köry Maincent, Bootlin > Embedded Linux and kernel engineering > https://bootlin.com >
