added code to register a device with input.h

1 files changed, 26 insertions, 1 deletions

diff --git a/skey.c b/skey.c
index e252cec..de255ab 100644
--- a/skey.c
+++ b/skey.c
@@ -5,6 +5,7 @@
 #include <linux/kthread.h>
 #include <linux/delay.h>
 #include <linux/sched.h>
+#include "keymap.h"
 /*
  * defines whether to access the gpios so other parts of the kernel module can
  * be tested on systems w/o the prerequisite GPIOs
@@ -22,11 +23,16 @@ static __initdata unsigned int row_pins[3] = {3, 6, 5};
 static __initdata char * clabels[10] = {"C0", "C1", "C2", "C3", "C4", "C5", "C6", "C7", "C8", "C9",};
 static __initdata char * rlabels[3] = {"R0", "R1", "R2"};
 /*
- * variables for setting up the thread
+ * task struct for setting up the thread
  */
 
 static struct task_struct *update_task;
 /*
+ * input.h input device
+ */
+struct input_dev * skey_dev;
+
+/*
  *This function is called every timer-period to actually read the keyboard
  */
 int skey_update_thread (void *data) {
@@ -121,6 +127,23 @@ static int  __init skey_init (void) {
 	} else {
 		printk(KERN_ALERT "skey: currently in test mode with gpio use disabled\n");
 	}
+	/*
+	 * sets up input.h device
+	 */
+	skey_dev = input_allocate_device();
+	if (!skey_dev) {
+		printk(KERN_ALERT "skey: unable to allocate input device\n");
+		return -ENOMEM;
+	}
+	// declares the event code and typesthe device emmits
+	set_bit(EV_KEY, skey_dev->evbit);
+	set_bit(EV_REL, skey_dev->evbit);
+	set_bit(KEY_A, skey_dev.keybit);
+	// registers the device
+	if (input_register_device(skey_dev)) {
+		input_free_device(skey_dev);
+		return -EINVAL;
+	}
 	//sets up update thread
 	printk("skey: setting up update thread...\n");
 	update_task = kthread_run(skey_update_thread, NULL, "skey_update_thread");
@@ -150,6 +173,8 @@ static void __exit skey_exit (void) {
 	}
 	//deletes the thread
 	kthread_stop(update_task);
+	//frees input device
+	input_free_device(skey_dev);
 	printk(KERN_INFO "skey: module exited\n");
 	return;
 }