On 10.09.24 14:36, Frank Wunderlich wrote: > Am 10. September 2024 14:08:07 MESZ schrieb Jan Kiszka > <[email protected]>: >> On 10.09.24 08:38, Sumit Garg wrote: >>> Hi Jan, >>> >>> On Thu, 5 Sept 2024 at 12:08, Jan Kiszka <[email protected]> wrote: >>>> >>>> On 04.09.24 19:29, Frank Wunderlich wrote: >>>>> >>>>> >>>>>> Gesendet: Mittwoch, 04. September 2024 um 19:16 Uhr >>>>>> Von: "Jan Kiszka" <[email protected]> >>>>>> OK, our overlay sources are on their way into mainline, will only take >>>>>> until 6.12-rc1 to get them here. >>> >>> Glad to hear that. >>> >>>>>> To accelerate the preparation, I ported >>>>>> that change to a local branch - just to find out that OF_UPSTREAM has no >>>>>> clue about DT overlays so far. And it is not just that there are no >>>>>> build rules for them (that was quickly fixed). It's also that there is >>>>>> no way to trigger their build for your u-boot proper. >>>>>> >>>>>> Are there plans for addressing this? I'm inclined to revive my patch >>>>>> that allows to augment dtb-y from the board's config.mk. Better >>>>>> suggestions? >>>>> >>>>> Hi >>>>> >>>>> i hang also on this part, in my case i build the dtbos for the vendor and >>>>> try to use fdtoverlay to merge base-dt with the defined overlays. >>>>> >>>>> see commits till July 11th >>>>> >>>>> https://github.com/frank-w/u-boot/commits/2024-07-bpi-ofupstream-all/ >>>>> >>>>> this fails because the target for fdtoverlays needs targets for the dtbos >>>>> (have used the fdtoverlay target from linux)... >>>>> but i build then without dedicated target (while building the basedt). >>>>> >>>>> maybe you can help solving the "small" problem in makefile. >>>>> >>>> >>>> This is close but not quite the same scenario because I only need "our" >>>> dtbos, and there is no need to create dtbs with them applied (they will >>>> be used during dt fixup in our case). > > Where do you apply the dtbos? In my case it is > necessary to build the dtb with overlay as we have > no way to detect which overlay needs to be > applied.
In our case, during ft_board_setup, thus dynamically: https://source.denx.de/u-boot/u-boot/-/blob/7b2d4ecd7f6593771dd3118c8bab525d727a91e0/board/siemens/iot2050/board.c#L474 > > We have overlays for different mmc (sdmmc/emmc) > and spi (nand/ nor) settings which cannot be probed at runtime (or at least > we have not found > a way to do this). > > > Maybe someone can help getting ftdoverlay target working in uboot with the > dtbo list. Yeah, that would be another path that requires additional work. Sorry, I'm not familiar with those details myself. Jan -- Siemens AG, Technology Linux Expert Center
