armv7l-linux: add a beagleboard.org kernel + platform. #31110
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Pretty sure the instructions on the wiki for BeagleBone boards already have this covered. @dezgeg’s generic armv7l install image worked out of the box when I used it a few months ago. This kernel simply adds some functionality that upstream Linux doesn’t support on this hardware, mainly related to GPIO. edit: but once this is merged, I can add a comment on the wiki explaining how to switch to this kernel. |
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| kernelPatches = args.kernelPatches; | ||
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| features.iwlwifi = true; |
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I think this features section needs to be:
features = {
efiBootStub = false;
} // (args.features or {});
if CONFIG_EFI_STUB is not enabled, or dropped if not (since the default is 'true'). This was changed in commit 8525b78
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Thanks. I wrote this several months ago and didn't catch the change.
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@dezgeg what are your thoughts on the extra platform? Keep it, or should the existing |
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Yeah, you could just update the On my TODO list is to eventually figure out a way to move the platform-specific defconfig names to the kernel expressions themselves (i.e. ... because typically if you specify only one of those lines, the end result is something unexpected. |
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Yeah, the most intuitive thing would be to specify a default, overridable kernel in the platform config. Anyway, I will make these changes and update the PR. |
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OK, I made the suggested fixes, including updating the existing I normally don't need to amend a PR, so I just pushed the changes on top of the original ones, which makes this kind of messy; but I think you all can fix that on your end when you merge it, right? Or do I need to rebase? |
Motivation for this change
/cc @dezgeg
beagleboard.org maintains a kernel fork for its armv7l-based BeagleBone platforms, maintained by @RobertCNelson. The fork adds support for BeagleBone-specific pinmuxes, DTSes, etc., and does a good job of tracking upstream.
I have been using kernels built from this kernel tree with NixOS on a BeagleBone Black for the past 5 months with great success. The device has maintained 100% uptime in an outdoor environment, running several services that read and write GPIO pins.
(Note: Robert maintains several kernel versions in this fork. I have only tested the 4.9 version, so that is the version used by this derivation.)
Things done
This patch adds a derivation for the beagleboard.org kernel; and a new variant of the existing
beagleboneplatform which uses thebb.org_defconfigdefconfig from the kernel fork.Alternatively, you could drop the new platform and simply modify the existing
beagleboneplatform to use this defconfig.build-use-sandboxinnix.confon non-NixOS)nix-shell -p nox --run "nox-review wip"./result/bin/)