I made some progress on this PR, it's ready to review again

https://github.com/NixOS/nixpkgs/pull/270763

It's a useful tool to get information from kernel and firmware about the type-c subsystem.
I want to use it to improve what data the firmware reports to the OS on framework systems

In reply to @saige:szp.lol
also recently switched to the cachyos kernel, specifically linuxPackages-cachyos-bore-lto which i think is the correct option? not sure yet if its having an effect (i thought i was already running the cachyos kernel a while ago tbh, but i must've accidentally reverted it or just completely imagined switching to it in the first place).

How did you get nix-cachyos-kernel to work with the framework kmod?
I get the following error:

error:
       … while calling the 'head' builtin
         at «github:NixOS/nixpkgs/71caefce12ba78d84fe618cf61644dce01cf3a96?narHash=sha256-yf3iYLGbGVlIthlQIk5/4/EQDZNNEmuqKZkQssMljuw%3D»/lib/attrsets.nix:1696:13:
         1695|           if length values == 1 || pred here (elemAt values 1) (head values) then
         1696|             head values
             |             ^
         1697|           else

       … while evaluating the attribute 'value'
         at «github:NixOS/nixpkgs/71caefce12ba78d84fe618cf61644dce01cf3a96?narHash=sha256-yf3iYLGbGVlIthlQIk5/4/EQDZNNEmuqKZkQssMljuw%3D»/lib/modules.nix:1118:7:
         1117|     // {
         1118|       value = addErrorContext "while evaluating the option `${showOption loc}':" value;
             |       ^
         1119|       inherit (res.defsFinal') highestPrio;

       … while evaluating the option `system.build.toplevel':

       … while evaluating definitions from `/nix/store/arylzmnn080w2i8hi0x45pgkd3mmp53r-source/nixos/modules/system/activation/top-level.nix':

       … while evaluating the option `assertions':

       … while evaluating definitions from `/nix/store/7icp9601511yjcl1x2nqrx7id4z10vkz-source/framework/kmod.nix':

       … while evaluating the option `hardware.framework.enableKmod':

       … while evaluating the option `boot.kernelPackages':

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: attribute 'extend' missing
       at «github:NixOS/nixpkgs/71caefce12ba78d84fe618cf61644dce01cf3a96?narHash=sha256-yf3iYLGbGVlIthlQIk5/4/EQDZNNEmuqKZkQssMljuw%3D»/nixos/modules/system/boot/kernel.nix:65:9:
           64|         kernelPackages:
           65|         kernelPackages.extend (
             |         ^
           66|           self: super: {