framework/12-inch: Add support for unl0kr

Signed-off-by: Daniel Schaefer <dhs@frame.work>

framework/12-inch/13th-gen-intel/README.md

@@ -12,3 +12,22 @@ $ fwupdmgr update
 ```
 
 - [Latest Update](https://fwupd.org/lvfs/devices/work.frame.Laptop12.RPL.BIOS.firmware)
+
+## Touchscreen support in initrd (for unl0kr)
+
+To unlock your LUKS disk encryption with an onscreen touch keyboard, you can use unl0kr.
+
+This module will automatically included the necessary kernel modules in initrd to make touchpad and touchscreen work when `boot.initrd.unl0kr.enable = true`.
+
+Example configuration:
+
+```nix
+{
+  boot.initrd.systemd.enable = true;
+  boot.initrd.unl0kr.enable = true;
+
+  boot.initrd.luks.devices."cryptroot" = {
+    device = "/dev/disk/by-uuid/YOUR-UUID-HERE";
+  };
+}
+```

framework/12-inch/13th-gen-intel/default.nix

@@ -9,5 +9,15 @@
   # before soc_button_array. Otherwise the tablet mode gpio doesn't work.
   # If correctly loaded, dmesg should show
   # input: gpio-keys as /devices/platform/INT33D3:00
-  boot.initrd.kernelModules = [ "pinctrl_tigerlake" ];
+  boot.initrd.kernelModules = [
+    "pinctrl_tigerlake"
+  ]
+  # Additional modules for touchscreen/touchpad in initrd (for unl0kr on-screen keyboard)
+  ++ lib.optionals config.boot.initrd.unl0kr.enable [
+    "intel_lpss_pci"
+    "i2c_hid_acpi"
+    "i2c_hid"
+    "hid_multitouch"
+    "hid_generic"
+  ];
 }