On 27. 03. 19 16:38, Jean-Jacques Hiblot wrote: > > The purpose of this series is to provide the SPL with ability to apply > overlays for u-boot. this is only a RFC so far, to get a feedback on the > approach. > > Our use-case is the support of the daughter boards of the AM65x EVM. In > Linux, each board is supported by a unique overlay. The presence of the > boards is detected at runtime, and some useful features (like USB) are > implemented on those daughter boards. Instead of providing multiple dtbs > and fall in a combinatorial pit, we propose to use DT overlays. > > Patch #1 "spl: fit: Add support for applying DT overlay" has been posted > a few weeks ago by Michal Simek. > Patch #2 and #3 amend Michal's patch. > Patch #4 and #5 are simple fixes for the Makefile > Patch #6 is not required but relates to this series and will be required > later by the AM6x platform > Patch #7 may be a bit controversial. It basically replaces u-boot.img with > a symlink to u-boot.itb in case we use a "complex" FIT (ie: if > SPL_FIT_SOURCE or SPL_FIT_GENERATOR are set). This breaks buildman for > several platforms because not all the binaries embedded in the FIT are > available. > Patch #9 adds a way to dynamically select the DT overlays. That is were we > would use HW detection to select the required overlays. In that case, the > board-level code tells what overlay it needs (it gives the name of the > node). > Patch #10 disables advanced SPL FIT features to keep the size of the SPL of > the am335x_evm in check > Patch #11 is not required, but demonstrates on a DRA76-evm how this series > can be used. > > On arm, if overlay are supported, this series increases the size of the SPL > by 3-4 kB. > > Changes in v2: > - reworked board_fit_get_additionnal_images() and how it used in spl_fit.c > - removed dtbo generation from dtso files and use .dts extension for the > overlays > - add dynamic allocation usage in a separate patch > - defconfig change for the am335x_evm
This series looks better. Is this able to also handle different images then just dtbs? Thanks, Michal _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
