[PATCH] LP: add sysfs class support for lp devices

Add sysfs class support for lp devices.

Based on a patch from Hanna Linder <hannal@us.ibm.com>

drivers/char/lp.c

@@ -145,6 +145,7 @@
 struct lp_struct lp_table[LP_NO];
 
 static unsigned int lp_count = 0;
+static struct class_simple *lp_class;
 
 #ifdef CONFIG_LP_CONSOLE
 static struct parport *console_registered; // initially NULL
@@ -795,6 +796,8 @@ static int lp_register(int nr, struct parport *port)
 	if (reset)
 		lp_reset(nr);
 
+	class_simple_device_add(lp_class, MKDEV(LP_MAJOR, nr), NULL,
+				"lp%d", nr);
 	devfs_mk_cdev(MKDEV(LP_MAJOR, nr), S_IFCHR | S_IRUGO | S_IWUGO,
 			"printers/%d", nr);
 
@@ -897,6 +900,7 @@ int __init lp_init (void)
 	}
 
 	devfs_mk_dir("printers");
+	lp_class = class_simple_create(THIS_MODULE, "printer");
 
 	if (parport_register_driver (&lp_driver)) {
 		printk (KERN_ERR "lp: unable to register with parport\n");
@@ -958,8 +962,10 @@ static void lp_cleanup_module (void)
 			continue;
 		parport_unregister_device(lp_table[offset].dev);
 		devfs_remove("printers/%d", offset);
+		class_simple_device_remove(MKDEV(LP_MAJOR, offset));
 	}
 	devfs_remove("printers");
+	class_simple_destroy(lp_class);
 }
 
 __setup("lp=", lp_setup);