Add GPL copyright notices

linux_driver/ai2c_platform_data.h

+/*
+ * This file is part of the Arduino I2C keyboard.
+ * Copyright (C) 2018  Forest Godfrey <fgodfrey@bigw.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
 #ifndef _AI2C_PLATFORM_DATA_H
 #define _AI2C_PLATFORM_DATA_H
 

linux_driver/arduino_i2c.c

+/*
+ * Arduino I2C Keyboard
+ * This kernel module provides evdev events for keys controlled by an I2C device.  An example
+ * compatible device is provided as an Arduino sketch in the directory above.
+ *
+ * Copyright (C) 2018  Forest Godfrey <fgodfrey@bigw.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+  * * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
 #include <linux/module.h>
 
 #include <linux/gpio.h>