On 2017-01-05, Riku Voipio wrote: > I only recently noticed that Debian doesn't seem use U-boot > support for extlinux style boot menus. This makes jumping > between kernel versions frustrating. > > I've taken the old syslinux support for menu generation and > re-purposed it for u-boot: > > https://github.com/suihkulokki/u-boot-update
Thanks for working on this! Karsten Merker, Ian Campbell and I had a bit of a discussion during Debconf15 about doing exactly this, and then I discovered it was removed From the syslinux/extlinux packages and put it on the back burner... This would also be good to do for debian-installer images (one concern was how widespread support for the "chosen" console was, as there was no way to pass the console via extlinux.conf in a platform agnostic way). > Note location is temporary, I don't know if this is > preferrable as independent package, part of flash-kernel > or even u-boot package itself. Indeed. On the one hand, it'd be nice to keep it outside of flash-kernel, so as not to require flash-kernel and it's dependencies. I could include it in the u-boot-tools package, but I'd want it to default to doing nothing out of the box, if someone is relying on a boot script this could break their boot configuration. It could also be implemented as a separate package and enabled by default; probably too late for stretch, though. > Setting this up for Dragonboard 410c is matter of: > > # echo U_BOOT_FDT=\"qcom/apq8016-sbc.dtb\" > /etc/default/u-boot > > This could be truly platform agnostic by using the > the "fdtdir" keyword in the menu. However, on u-boot the > fdtfile is "apq8016-sbc.dtb", missing the qcom/ directory > prefix. We need to submit a patch for u-boot to search device > tree from vendor sub-dirs too. Yes, that would be nice. I made a couple fixes for my use-case and tested with pine64. I've submitted a pull request that fixes an issue with falling back to using "fdtdir" and make the "fdtdir" configurable via a variable to improve compatibility with flash-kernel or when /boot is on a separate partition: https://github.com/suihkulokki/u-boot-update/pull/1 My workaround was to use flash-kernel to copy the dtb into /boot (which I had to do anyways, since /boot was on a separate partition), and configure /boot/dtbs/$VERSION in my patches above. live well, vagrant
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