From 9554fe1cb2f5697e8f18ba3354ba352525f6bd51 Mon Sep 17 00:00:00 2001
From: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
Date: Tue, 13 Jan 2026 14:23:42 +0100
Subject: [PATCH] Allow user USB access to FTDI device in tent

---
 m/module/tc1-board.nix   | 15 +++++++++++++++
 m/tent/configuration.nix |  1 +
 2 files changed, 16 insertions(+)
 create mode 100644 m/module/tc1-board.nix

diff --git a/m/module/tc1-board.nix b/m/module/tc1-board.nix
new file mode 100644
index 00000000..27bc73b0
--- /dev/null
+++ b/m/module/tc1-board.nix
@@ -0,0 +1,15 @@
+{ lib, pkgs, ... }:
+
+{
+  # Allow user access to FTDI USB device
+  services.udev.packages = lib.singleton (pkgs.writeTextFile {
+    # Needs to be < 73
+    name = "60-ftdi-tc1.rules";
+    text = ''
+      # Bus 003 Device 003: ID 0403:6011 Future Technology Devices International, Ltd FT4232H Quad HS USB-UART/FIFO IC
+      # Use := to make sure it doesn't get changed later
+      SUBSYSTEMS=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6011", MODE:="0666", TAG+="uaccess"
+    '';
+    destination = "/etc/udev/rules.d/60-ftdi-tc1.rules";
+  });
+}
diff --git a/m/tent/configuration.nix b/m/tent/configuration.nix
index a165b6bc..2b7f3f42 100644
--- a/m/tent/configuration.nix
+++ b/m/tent/configuration.nix
@@ -16,6 +16,7 @@
     ../module/p.nix
     ../module/vpn-dac.nix
     ../module/hut-substituter.nix
+    ../module/tc1-board.nix
   ];
 
   # Select the this using the ID to avoid mismatches