linux 控制键盘上的led

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/leds.h>

static struct led_classdev my_led;

static int __init my_led_init(void) {
    my_led.name = "my_led";
    my_led.brightness = 255;
    my_led.max_brightness = 255;
    my_led.brightness_set = NULL;

    if (led_classdev_register(NULL, &my_led) < 0) {
        printk(KERN_ERR "Failed to register LED device\n");
        return -EIO;
    }

    printk(KERN_INFO "LED device registered\n");
    return 0;
}

static void __exit my_led_exit(void) {
    led_classdev_unregister(&my_led);
    printk(KERN_INFO "LED device unregistered\n");
}

module_init(my_led_init);
module_exit(my_led_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("A simple LED control module");

sudo setleds -L +num