hello_class = class_create(THIS_MODULE, classname); if(IS_ERR(hello_class)) { printk("Failed at class_create().Please exec [mknod] before operate the device/n"); } else { device_create(hello_class, NULL, devnum,NULL, devicename); } open_count = 0; langtype = english; inbuffer ...
提醒一点,udev是应用层的,不要试图在内核的配置选项里找到它;加入对udev的支持很简单,以作者所写的一个字符设备驱动为例,在驱动初始化的代码里调用class_create为该设备创建一个class,再为每个设备调用device_create创建对应的设备。大致用法如下: struct class *myclass ; class_create(THIS_MODULE, “my_device_...
13 mem_class = class_create(THIS_MODULE, "my_char_dev"); 14 if (mem_class==NULL) 15 { 16 printk("<0> create class failed!\n"); 17 return -1; 18 } 19 20 return 0; 21 } 22 23 static void __exit class_create_destroy_exit(void) 24 { 25 if (mem_class != NULL) 26 { ...
hello_class = class_create(THIS_MODULE, classname); if(IS_ERR(hello_class)) { printk("Failed at class_create().Please exec [mknod] before operate the device/n"); } else { device_create(hello_class, NULL, devnum,NULL, devicename); } open_count = 0; langtype = english; inbuffer ...
}mtd_class=class_create(THIS_MODULE,"mtd");//创建类if(IS_ERR(mtd_class)){printk(KERN_ERR"Error creating mtd class.\n");unregister_chrdev(MTD_CHAR_MAJOR,"mtd");returnPTR_ERR(mtd_class);}register_mtd_user(¬ifier);//调用register_mtd_user(),将notifier添加到mtd_notifiers链表中return0;...
if(IS_ERR(dev_class = class_create(THIS_MODULE,"my_class")))gotor_class; if(IS_ERR(device_create(dev_class,NULL, dev,NULL,"my_device")))gotor_device; init_waitqueue_head(&my_waitqueue); if((wait_thread = kthread_create(wait_function,NULL,"WaitThread")))wake_up_process(wait_thre...
}cls = class_create(THIS_MODULE, "hellocls");if (IS_ERR(cls)) {printk(KERN_ERR "class_create() failed for cls\n");result = PTR_ERR(cls);goto out_err_1;}devno = MKDEV(major, minor);class_dev = device_create(cls, NULL, devno, NULL, "hellodev");if (IS_ERR(class_dev)) ...
/sys/class/leds//trigger文件进行控制。 triggers:指向LED设备可用触发器的链表。 LED框架初始化 staticint__initleds_init(void){ leds_class = class_create(THIS_MODULE,"leds");if(IS_ERR(leds_class))returnPTR_ERR(leds_class); leds_class- >pm = &leds_class_dev_pm_ops; ...
driver1_class = class_create(THIS_MODULE, "driver1"); driver1_dev = device_create(driver1_class, NULL, MKDEV(major, 0), NULL, "driver1"); #endif return 0; } 3. driver1_exit() 函数 static void __exit driver1_exit(void)
class_create 一共有两个参数,参数 owner 一般为 THIS_MODULE,参数 name 是类名字。设备类名对应 /sys/class 目录的子目录名。返回值是个指向结构体 class 的指针,也就是创建的类。 卸载驱动程序的时候需要删除掉类,类删除函数为 class_destroy void class_destroy(struct class *cls); // cls要删除的类 ②...