[PATCH 00/16] Convert extension support to UCLASS and adds its support to boot flows
Kory Maincent
kory.maincent at bootlin.com
Fri Oct 3 18:33:40 CEST 2025
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?
Signed-off-by: Kory Maincent <kory.maincent at bootlin.com>
---
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
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