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author | Alyssa Ross <hi@alyssa.is> | 2021-08-04 10:43:07 +0000 |
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committer | Alyssa Ross <hi@alyssa.is> | 2021-08-04 10:43:07 +0000 |
commit | 62614cbef7da005c1eda8c9400160f6bcd6546b8 (patch) | |
tree | c2630f69080637987b68acb1ee8676d2681fe304 /nixos/modules/hardware/i2c.nix | |
parent | d9c82ed3044c72cecf01c6ea042489d30914577c (diff) | |
parent | e24069138dfec3ef94f211f1da005bb5395adc11 (diff) | |
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Merge branch 'nixpkgs-update' into master
Diffstat (limited to 'nixos/modules/hardware/i2c.nix')
-rw-r--r-- | nixos/modules/hardware/i2c.nix | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/nixos/modules/hardware/i2c.nix b/nixos/modules/hardware/i2c.nix new file mode 100644 index 00000000000..ff14b4b1c89 --- /dev/null +++ b/nixos/modules/hardware/i2c.nix @@ -0,0 +1,43 @@ +{ config, lib, ... }: + +with lib; + +let + cfg = config.hardware.i2c; +in + +{ + options.hardware.i2c = { + enable = mkEnableOption '' + i2c devices support. By default access is granted to users in the "i2c" + group (will be created if non-existent) and any user with a seat, meaning + logged on the computer locally. + ''; + + group = mkOption { + type = types.str; + default = "i2c"; + description = '' + Grant access to i2c devices (/dev/i2c-*) to users in this group. + ''; + }; + }; + + config = mkIf cfg.enable { + + boot.kernelModules = [ "i2c-dev" ]; + + users.groups = mkIf (cfg.group == "i2c") { + i2c = { }; + }; + + services.udev.extraRules = '' + # allow group ${cfg.group} and users with a seat use of i2c devices + ACTION=="add", KERNEL=="i2c-[0-9]*", TAG+="uaccess", GROUP="${cfg.group}", MODE="660" + ''; + + }; + + meta.maintainers = [ maintainers.rnhmjoj ]; + +} |