With this series barebox gains the capability to apply device tree overlays to the kernel device tree before starting the kernel with it. Which overlays are applied can be controlled with a set of globavars, for details see the documentation patch in this series. The particular usecase we have in mind with this series is that the rootfs has a bunch of device tree overlays in it which shall be applied based on bootloader knowledge. For example information of the exact board type might be stored in an EEPROM. Based on that information barebox can now pick the right overlays for that board from the rootfs. Interpreting the EEPROM content is board specific and not part of this series, for now the the globalvars must be set manually. Sascha Sascha Hauer (17): fdt: Check blob size during unflattening firmware: make device_node argument non const libbb: Add find_path function firmware: consolidate ifdefs firmware: Add search path firmware: Fix device_node matching firmware: recognize by reproducible name blspec: Set firmware searchpath overlay: only apply compatible trees overlay: Add of_overlay_apply_file() firmware: Load from global search path blspec: Rework firmware load of_overlay: apply overlays during booting blspec: Apply overlays from rootfs doc: devicetree: Refer to internal device tree also as live tree Documentation: Add documentation for device tree overlays of_firmware: Fix handling of firmware-name property Documentation/user/devicetree.rst | 39 +++++- arch/arm/boards/highbank/init.c | 2 +- arch/arm/boards/qemu-virt/board.c | 4 +- arch/arm/boards/raspberry-pi/rpi-common.c | 2 +- arch/arm/boards/webasto-ccbv2/board.c | 2 +- arch/arm/lib32/bootm.c | 2 +- commands/of_diff.c | 2 +- commands/of_display_timings.c | 2 +- commands/of_dump.c | 4 +- commands/of_overlay.c | 16 +-- commands/oftree.c | 2 +- common/blspec.c | 99 ++++++--------- common/bootm.c | 4 +- common/efi/efi.c | 2 +- common/firmware.c | 59 ++++++++- common/image-fit.c | 2 +- common/state/backend_format_dtb.c | 2 +- drivers/firmware/altera_serial.c | 1 + drivers/firmware/socfpga.c | 2 + drivers/firmware/zynqmp-fpga.c | 2 + drivers/of/base.c | 2 +- drivers/of/fdt.c | 17 ++- drivers/of/of_firmware.c | 56 ++------- drivers/of/overlay.c | 146 ++++++++++++++++++++++ include/firmware.h | 26 ++-- include/libbb.h | 4 +- include/of.h | 33 ++++- lib/libbb.c | 58 ++++++--- 28 files changed, 413 insertions(+), 179 deletions(-) -- 2.29.2 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
