From 9595b72bc118ddeaa3805b74d2772aa2c9f75048 Mon Sep 17 00:00:00 2001
From: Wolfgang Hottgenroth <wolfgang.hottgenroth@icloud.com>
Date: Mon, 16 Jun 2025 21:30:39 +0100
Subject: [PATCH] more io stuff

---
 driver/io.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/driver/io.c b/driver/io.c
index 0b3ea90..9cb89c7 100644
--- a/driver/io.c
+++ b/driver/io.c
@@ -1,9 +1,50 @@
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/ioctl.h>
 
 #include "io.h"
+#include "counter_io_calls.h"
+
+
+static dev_t io_device_no;
+static struct class *io_device_class;
+static struct cdev io_device;
+
+#define DRIVER_NAME "cntiodev"
+#define DRIVER_CLASS "CounterClass"
+
+
+
+static int io_open(struct inode *device_file, struct file *instance) {
+  printk("counter - Info! io open was called\n");
+  return 0;
+}
+
+static int io_close(struct inode *device_file, struct file *instance) {
+  printk("counter - Info! io close was called\n");
+  return 0;
+}
+
+
+
+static struct file_operations fops = {
+  .owner = THIS_MODULE,
+  .open = io_open,
+  .release = io_close,
+};
 
 int io_init(void) {
+  printk("counter - Info! io init\n");
+
+  if (alloc_chrdev_region(&io_device_no, 0, 1, DRIVER_NAME) < 0) {
+    printk("counter - ERROR! Device No. could not be allocated\n");
+    return -1;
+  }
+  printk("counter - Info! Device No. Major: %d, Minor: %d was registered!\n", my_device_nr >> 20, my_device_nr & 0xfffff);
+
+
+
   return 0;
 }