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kernelPatches: ath driver: allow setting regulatory domain

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Ports an OpenWRT patch for Atheros wireless drivers (ath*) which allows
the user to change the regulatory domain code to the one which actually
applies.

All Atheros devices have a regulatory domain burned into their EEPROM.
When using a device as AP, this domain is frequently overly restrictive
when compared to the regulation which applies in the country the device
actually operates in; often, this restriction disallows IR on all
channels making it impossible to use the device as an AP at all.

This commit introduces the NixOS config option
networking.wireless.athUserRegulatoryDomain which, if enabled, applies
the patch and sets the kernel config option ATH_USER_REGD.

The original OpenWRT patch targets Linux 5.8.
This commit is contained in:
Vincent Haupert 2021-01-04 19:47:44 +01:00
parent 14121941b1
commit af8abf141d
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GPG key ID: A8B605E96F82B4E4
3 changed files with 45 additions and 0 deletions
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31
nixos/modules/hardware/network/ath-user-regd.nix Normal file
View file

@ -0,0 +1,31 @@
{ config, lib, pkgs, ... }:
with lib;
let
kernelVersion = config.boot.kernelPackages.kernel.version;
linuxKernelMinVersion = "5.8";
kernelPatch = pkgs.kernelPatches.ath_regd_optional // {
extraConfig = ''
ATH_USER_REGD y
'';
};
in
{
options.networking.wireless.athUserRegulatoryDomain = mkOption {
default = false;
type = types.bool;
description = ''
If enabled, sets the ATH_USER_REGD kernel config switch to true to
disable the enforcement of EEPROM regulatory restrictions for ath
drivers. Requires at least Linux ${linuxKernelMinVersion}.
'';
};
config = mkIf config.networking.wireless.athUserRegulatoryDomain {
assertions = singleton {
assertion = lessThan 0 (builtins.compareVersions kernelVersion linuxKernelMinVersion);
message = "ATH_USER_REGD patch for kernels older than ${linuxKernelMinVersion} not ported yet!";
};
boot.kernelPatches = [ kernelPatch ];
};
}

1
nixos/modules/module-list.nix
View file

@ -52,6 +52,7 @@
./hardware/ledger.nix
./hardware/logitech.nix
./hardware/mcelog.nix
./hardware/network/ath-user-regd.nix
./hardware/network/b43.nix
./hardware/network/intel-2200bg.nix
./hardware/nitrokey.nix

13
pkgs/os-specific/linux/kernel/patches.nix
View file

@ -1,6 +1,19 @@
{ lib, fetchpatch, fetchurl }:
{
ath_regd_optional = rec {
name = "ath_regd_optional";
patch = fetchpatch {
name = name + ".patch";
url = "https://github.com/openwrt/openwrt/raw/ed2015c38617ed6624471e77f27fbb0c58c8c660/package/kernel/mac80211/patches/ath/402-ath_regd_optional.patch";
sha256 = "1ssDXSweHhF+pMZyd6kSrzeW60eb6MO6tlf0il17RC0=";
postFetch = ''
sed -i 's/CPTCFG_/CONFIG_/g' $out
sed -i '/--- a\/local-symbols/,$d' $out
'';
};
};
bridge_stp_helper =
{ name = "bridge-stp-helper";
patch = ./bridge-stp-helper.patch;