Hi Tim, On Tue, Feb 19, 2019 at 4:11 PM Tim Harvey <thar...@gateworks.com> wrote:
> Fabio / Stefano, > > Thanks for your quick response. Yes, I've been looking at the > mx6sabreauto conversion series and trying to plot a course for my > boards that won't completely thrash users - we need backwards > compatibility. > > We currently have a large list of IMX6 boards with different dtbs > (about 10 boards in total resulting in 20 dtbs b/c of the imx6q vs > imx6dl options). These currently are all covered by a single > SPL/U-Boot binary of board/gateworks/gw_ventana and not using > OF_CONTROL (as its relatively new for IMX6 and these boards have been > around for many years now). Boot scripts are setup to load the DTB > from the root filesystem which varies per OS between a ubi volume or > ext filesytem. > > So it looks like what I need to do is add all my device-tree's from > the kernel to U-Boot's arch/arm/dts, add SPL_MULTI_DTB_FIT support and > a board_fit_config_name_match() function for the SPL to pick the right > DTB. Some questions come to mind: > > 1. Where would I apply any fixup's to the DTBs before they are used by the > SPL? > > 2. I'm assuming the FIT image is embedded within the SPL and thus does > not require specific storage/filesystem support? > > 3. Users are used to being able to update the DTB's used by Linux by > updating them on the filesystem - does all of this give the user the > option of using either the DTB that U-Boot uses vs the DTB that > already exists on one of the partitions? If the bootscripts already > load a DTB from a filesystem does U-Boot's ft_board_setup() still > function normally? I don't have the answers to your questions. Added some folks who could probably help. When it comes to U-Boot DM, I am still at the beginner level :-) _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
