On Sun, 30 Aug 2026 at 11:18, Carlo Caione <[email protected]> wrote: > > RITY images select a base devicetree and an ordered list of overlays
What's an RITY image? > through the storage, storage_dev, dtb_path, boot_dtb, fdtfile and list_dtbo > environment variables. EFI boot needs the selected tree to be assembled > and published through fdt_addr before the operating system is started. > > The environment interface, source-discovery rules and appended-image layout > form a MediaTek-specific RITY contract. The referenced data uses existing > U-Boot image formats, filesystems and storage stacks. > > Add MediaTek support to consume that interface. It locates the selected > source on GPT block partitions or on the RITY UBI/UBIFS NOR layout, loads > the base DTB, applies list_dtbo in order and publishes the completed tree. > Both raw and authenticated DTB and DTBO inputs are supported. > > Expose mtk_fdt_prepare for interactive use. Retain the dtbprobe and > fdtprobe command names and positional arguments used by RITY EFI boot > environments. Also provide bootembedded for legacy boot. It locates and > runs the appended RITY boot script through the standard source command, > leaving the legacy policy and authentication to source and bootm. > > The command entry points live under cmd/mediatek and are documented under > doc/usage/cmd. The implementation uses existing block, MTD, UBI/UBIFS, > libfdt overlay, image verification, source and bootm services. > > Signed-off-by: Carlo Caione <[email protected]> > --- > Changes in v2: > - Clarify that the RITY contract is MediaTek-specific and uses existing > U-Boot formats and storage stacks. > - Move command entry points and command configuration under cmd/mediatek. > - Add documentation for mtk_fdt_prepare, dtbprobe, fdtprobe and > bootembedded. > - Rebase onto commit 658fc6aee957 ("fs/squashfs: fix directory table integer > overflow" series merge). > - Link to v1: > https://patch.msgid.link/20260828-ccaione-upstream-mtk-fdt-prepare-v1-0-bf80b489e...@baylibre.com > > --- > Carlo Caione (3): > arm: mediatek: add RITY devicetree preparation > arm: mediatek: add RITY devicetree compatibility commands > arm: mediatek: add bootembedded compatibility command > > MAINTAINERS | 3 + > arch/arm/include/asm/arch-mediatek/fdt_prepare.h | 10 + > arch/arm/mach-mediatek/Kconfig | 25 ++ > arch/arm/mach-mediatek/Makefile | 1 + > arch/arm/mach-mediatek/fdt_prepare.c | 501 > +++++++++++++++++++++++ > cmd/Kconfig | 1 + > cmd/Makefile | 3 + > cmd/mediatek/Kconfig | 31 ++ > cmd/mediatek/Makefile | 4 + > cmd/mediatek/bootembedded.c | 59 +++ > cmd/mediatek/fdt_prepare.c | 65 +++ > doc/usage/cmd/bootembedded.rst | 51 +++ > doc/usage/cmd/mtk_fdt_prepare.rst | 90 ++++ > 13 files changed, 844 insertions(+) > --- > base-commit: 658fc6aee95784139f070f9945cb3bc5da8d7d22 > change-id: 20260827-ccaione-upstream-mtk-fdt-prepare-68f51a5fd2ea > > Best regards, > -- > Carlo Caione <[email protected]> >
