From 37bd21ab3c81507bbcbb6022b51c297353e8b18a Mon Sep 17 00:00:00 2001
From: Thiago Sposito <th.spo@pm.me>
Date: Fri, 14 Nov 2025 12:21:55 -0300
Subject: [PATCH] chore: add i2c kernel module and group configuration

---
 hosts/common/default.nix | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/hosts/common/default.nix b/hosts/common/default.nix
index c78cc0d..d7878d4 100644
--- a/hosts/common/default.nix
+++ b/hosts/common/default.nix
@@ -9,6 +9,7 @@
   imports = [ ./users/thiago/default.nix ];
 
   boot.loader.systemd-boot.enable = true;
+  boot.kernelModules = [ "i2c-dev" ];
 
   nixpkgs.overlays = [
     (final: prev: {
@@ -105,10 +106,15 @@
     # xserver.displayManager.sessionCommands =
     #   "${pkgs.xorg.xmodmap}/bin/xmodmap -e 'keycode 64 = Alt_L'";
 
-    udev.packages = [
-      pkgs.libwacom
-      pkgs.nitrokey-udev-rules
-    ];
+    udev = {
+      packages = [
+        pkgs.libwacom
+        pkgs.nitrokey-udev-rules
+      ];
+      extraRules = ''
+        KERNEL=="i2c-[0-9]*", GROUP="i2c", MODE="0660"
+      '';
+    };
   };
 
   # hardware = {
@@ -126,6 +132,7 @@
   #   };
   # };
   users.groups.scard = { };
+  users.groups.i2c = { };
 
   time.timeZone = "America/Sao_Paulo";