#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>

#include "main.h"
#include "platform.h"

struct class* class;

static int mod_init(void) {
	int err;

	// create /sys/class/lork
	class = class_create("lork");
	if (IS_ERR_OR_NULL(class)) {
		err = PTR_ERR(class);
		printk(KERN_ERR "class_create error %d\n", err);
		goto free_class;
	}

	// create platform driver
	err = platform_driver_register(&lork_driver);
	if (err) goto return_err;

	// create attribute under /sys/bus/platform/drivers/gpio-extern
	err = driver_create_file(&lork_driver.driver, &attr);
	if (err) goto return_err;

	printk("%s() OK\n", __PRETTY_FUNCTION__);
	return 0;

return_err:
free_class:
	class_destroy(class);
	printk("%s() -> %d\n", __PRETTY_FUNCTION__, err);
	return err;
}

static void mod_exit(void) {
	driver_remove_file(&lork_driver.driver, &attr);
	platform_driver_unregister(&lork_driver);
	class_destroy(class);
	printk("%s()\n", __PRETTY_FUNCTION__);
}

module_init(mod_init);
module_exit(mod_exit);
MODULE_LICENSE("Dual MIT/GPL");