WATCHDOG: don't auto-grab eurotechwdt.

index b14e9d1..c4eb06c 100644
@@ -56,6 +56,7 @@
 #include <linux/notifier.h>
 #include <linux/reboot.h>
 #include <linux/init.h>
+#include <linux/isa.h>
 
 #include <asm/io.h>
 #include <asm/uaccess.h>

@@ -70,8 +71,8 @@ static char eur_expect_close;
  * You can use eurwdt=x,y to set these now.
  */
 
-static int io = 0x3f0;
-static int irq = 10;
+static int io;			/* 0x3f0 */
+static int irq = -1;		/* 10    */
 static char *ev = "int";
 
 #define WDT_TIMEOUT		60                /* 1 minute */

@@ -95,9 +96,9 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" _
 
 
 module_param(io, int, 0);
-MODULE_PARM_DESC(io, "Eurotech WDT io port (default=0x3f0)");
+MODULE_PARM_DESC(io, "Eurotech WDT io port (mandatory)");
 module_param(irq, int, 0);
-MODULE_PARM_DESC(irq, "Eurotech WDT irq (default=10)");
+MODULE_PARM_DESC(irq, "Eurotech WDT irq (mandatory)");
 module_param(ev, charp, 0);
 MODULE_PARM_DESC(ev, "Eurotech WDT event type (default is `int')");
 

@@ -385,41 +386,28 @@ static struct notifier_block eurwdt_notifier = {
 	.notifier_call = eurwdt_notify_sys,
 };
 
-/**
- * cleanup_module:
- *
- * Unload the watchdog. You cannot do this with any file handles open.
- * If your watchdog is set to continue ticking on close and you unload
- * it, well it keeps ticking. We won't get the interrupt but the board
- * will not touch PC memory so all is fine. You just have to load a new
- * module in 60 seconds or reboot.
- */
-
-static void __exit eurwdt_exit(void)
+static int __devinit eurwdt_isa_match(struct device *dev, unsigned int id)
 {
-	eurwdt_lock_chip();
+	int match = io != 0 && irq != -1;
 
-	misc_deregister(&eurwdt_miscdev);
+	if (!match)
+		dev_err(dev, "please specify io and irq\n");
 
-	unregister_reboot_notifier(&eurwdt_notifier);
-	release_region(io, 2);
-	free_irq(irq, NULL);
+	return match;
 }
 
-/**
- * eurwdt_init:
- *
+/*
  * Set up the WDT watchdog board. After grabbing the resources
  * we require we need also to unlock the device.
  * The open() function will actually kick the board off.
  */
 
-static int __init eurwdt_init(void)
+static int __devinit eurwdt_isa_probe(struct device *dev, unsigned int id)
 {
 	int ret;
 
 	ret = request_irq(irq, eurwdt_interrupt, IRQF_DISABLED, "eurwdt", NULL);
-	if(ret) {
+	if (ret) {
 		printk(KERN_ERR "eurwdt: IRQ %d is not free.\n", irq);
 		goto out;
 	}

@@ -464,8 +452,48 @@ outirq:
 	goto out;
 }
 
-module_init(eurwdt_init);
-module_exit(eurwdt_exit);
+/*
+ * Unload the watchdog. You cannot do this with any file handles open.
+ * If your watchdog is set to continue ticking on close and you unload
+ * it, well it keeps ticking. We won't get the interrupt but the board
+ * will not touch PC memory so all is fine. You just have to load a new
+ * module in 60 seconds or reboot.
+ */
+
+static int __devexit eurwdt_isa_remove(struct device *dev, unsigned int id)
+{
+	eurwdt_lock_chip();
+
+	misc_deregister(&eurwdt_miscdev);
+
+	unregister_reboot_notifier(&eurwdt_notifier);
+	release_region(io, 2);
+	free_irq(irq, NULL);
+	return 0;
+}
+
+static struct isa_driver eurwdt_isa_driver = {
+	.match		= eurwdt_isa_match,
+	.probe		= eurwdt_isa_probe,
+	.remove		= __devexit_p(eurwdt_isa_remove),
+	.driver		= {
+		.owner	= THIS_MODULE,
+		.name	= "eurwdt",
+	},
+};
+
+static int __init eurwdt_init_module(void)
+{
+	return isa_register_driver(&eurwdt_isa_driver, 1);
+}
+
+static void __exit eurwdt_exit_module(void)
+{
+	isa_unregister_driver(&eurwdt_isa_driver);
+}
+
+module_init(eurwdt_init_module);
+module_exit(eurwdt_exit_module);
 
 MODULE_AUTHOR("Rodolfo Giometti");
 MODULE_DESCRIPTION("Driver for Eurotech CPU-1220/1410 on board watchdog");