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// #include <linux/cdev.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include "main.h"
#include "platform.h"
// struct cdev *cdev;
struct device *dev;
struct class *class;
dev_t node = 0; // do not register /dev/lork
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);
goto free_class;
}
// create device (required for device attributes under /sys/class)
dev = device_create(class, NULL, node, NULL, "lork");
if (IS_ERR_OR_NULL(dev)) {
err = PTR_ERR(dev);
goto free_device;
}
// create platform driver
err = platform_driver_register(&lork_driver);
if (err) goto free_platform_driver;
// create driver attribute under /sys/bus/platform/drivers/gpio-extern
err = driver_create_file(&lork_driver.driver, &drv_attr_int);
if (err) goto free_drv_attr_int;
// create device attributes under /sys/class
err = device_create_file(dev, &dev_attr_int);
if (err) goto free_dev_attr_int;
err = device_create_file(dev, &dev_attr_str);
if (err) goto free_dev_attr_str;
printk("%s() OK\n", __PRETTY_FUNCTION__);
return 0;
free_dev_attr_str:
device_remove_file(dev, &dev_attr_str);
free_dev_attr_int:
device_remove_file(dev, &dev_attr_int);
free_drv_attr_int:
driver_remove_file(&lork_driver.driver, &drv_attr_int);
free_platform_driver:
platform_driver_unregister(&lork_driver);
free_device:
device_destroy(class, node);
free_class:
class_destroy(class);
printk("%s() -> %d\n", __PRETTY_FUNCTION__, err);
return err;
}
static void mod_exit(void) {
device_remove_file(dev, &dev_attr_str);
device_remove_file(dev, &dev_attr_int);
driver_remove_file(&lork_driver.driver, &drv_attr_int);
platform_driver_unregister(&lork_driver);
device_destroy(class, node);
class_destroy(class);
printk("%s()\n", __PRETTY_FUNCTION__);
}
module_init(mod_init);
module_exit(mod_exit);
MODULE_LICENSE("Dual MIT/GPL");
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