1.device_create source位于:drivers\base\Core.c。向sysfs注册一个device,提供了强大的格式化注册接口。 1/**2* device_create - creates a device and registers it with sysfs3* @class: pointer to the struct class that this device should be registered to4* @parent: pointer to the parent struct d...
1.device_create source位于:drivers\base\Core.c。向sysfs注册一个device,提供了强大的格式化注册接口。 1/**2* device_create - creates a device and registers it with sysfs3* @class: pointer to the struct class that this device should be registered to4* @parent: pointer to the parent struct d...
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 ...
device_create_file不做详细解析,因为devices本来就是/sys文件系统中的重要概念 关键是devtmpfs_create_node 什么是Devtmpfs 的概念 Devtmpfs lets the kernel create a tmpfs very early at kernel initialization , before any driver core device is...
myclass=class_create(THIS_MODULE,"mychrdev");if(IS_ERR(myclass))gotoerr3;printk("class_create() ok\n");mydevice=device_create(myclass,NULL,dev,NULL,DEMO_NAME);if(IS_ERR(mydevice))gotoerr4;printk("device_create() ok\n");return0;// 有错误发生, 则撤销前面的步骤分配的...
int device_create_file(struct device *device, struct device_attribute * entry); void device_remove_file(struct device * dev, struct device_attribute * attr); 一个实例是:终端执行:cd /sys/class/leds/lcd-backlight, ls回显: uevent subsystem ...
devices_kset由kset_create_and_add创建,uevent_ops为device_uevent_ops bus_kset和devices_kset的parent都为NULL system_kset由kset_create_and_add创建,parent为devices_kset,uevent_ops为NULL bus_kset、devices_kset和system_kset的ktype都是默认的kset_ktype dev_kobj由kobject_create_and_add,作为sysfs_dev_...
ret = sysfs_create_link(&dev->kobj, &dev->driver->p->kobj, 27. 、160; "driver"); 28. if (ret) 29. sysfs_remove_li24、nk(&dev->driver->p->kobj, 30. kobject_name(&dev->kobj); 31. 32. return re25、t; 33. 34. 35. static void driver_sysfs_remove(struct device *...
int __initdevices_init(void){devices_kset=kset_create_and_add("devices",&device_uevent_ops,NULL);if(!devices_kset)return-ENOMEM;dev_kobj=kobject_create_and_add("dev",NULL);if(!dev_kobj)goto dev_kobj_err;sysfs_dev_block_kobj=kobject_create_and_add("block",dev_kobj);if(!sysfs_dev...
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