衡水wap网站建设价格,响应式学校网站模板下载,企业所得税2020最新,个人品牌网站建设//主要是在/sys/class/ 下创建一个 “name”的文件夹 #xff01;从linux内核2.6的某个版本之后#xff0c;devfs不复存在#xff0c;udev成为devfs的替代。相比devfs#xff0c;udev有很多优势#xff0c;在此就不罗嗦了#xff0c;提醒一点#xff0c;udev是应用层的东…//主要是在/sys/class/ 下创建一个 “name”的文件夹 从linux内核2.6的某个版本之后devfs不复存在udev成为devfs的替代。相比devfsudev有很多优势在此就不罗嗦了提醒一点udev是应用层的东东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 class_device_create创建对应的设备。大致用法如下
struct class *myclass class_create(THIS_MODULE, “my_device_driver”);
class_device_create(myclass, NULL, MKDEV(major_num, 0), NULL, “my_device”);
这样的module被加载时udev daemon就会自动在/dev下创建my_device设备文件。class_create()
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linux-2.6.22/include/linux/device.h
struct class *class_create(struct module *owner, const char *name)class_create - create a struct class structureowner: pointer to the module that is to own this struct classname: pointer to a string for the name of this class.
在/sys/class/下创建类目录class_device_create()
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linux-2.6.22/include/linux/device.h
struct class_device *class_device_create(struct class *cls,struct class_device *parent,dev_t devt,struct device *device,const char *fmt, ...)class_device_create - creates a class device and registers it with sysfscls: pointer to the struct class that this device should be registered to.parent: pointer to the parent struct class_device of this new device, if any.devt: the dev_t for the char device to be added.device: a pointer to a struct device that is assiociated with this class device.fmt: string for the class devices name
//主要是在/sys/class/ 下创建一个 “name”的文件夹 从linux内核2.6的某个版本之后devfs不复存在udev成为devfs的替代。相比devfsudev有很多优势在此就不罗嗦了提醒一点udev是应用层的东东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 class_device_create创建对应的设备。大致用法如下
struct class *myclass class_create(THIS_MODULE, “my_device_driver”);
class_device_create(myclass, NULL, MKDEV(major_num, 0), NULL, “my_device”);
这样的module被加载时udev daemon就会自动在/dev下创建my_device设备文件。class_create()
-------------------------------------------------
linux-2.6.22/include/linux/device.h
struct class *class_create(struct module *owner, const char *name)class_create - create a struct class structureowner: pointer to the module that is to own this struct classname: pointer to a string for the name of this class.
在/sys/class/下创建类目录class_device_create()
-------------------------------------------------
linux-2.6.22/include/linux/device.h
struct class_device *class_device_create(struct class *cls,struct class_device *parent,dev_t devt,struct device *device,const char *fmt, ...)class_device_create - creates a class device and registers it with sysfscls: pointer to the struct class that this device should be registered to.parent: pointer to the parent struct class_device of this new device, if any.devt: the dev_t for the char device to be added.device: a pointer to a struct device that is assiociated with this class device.fmt: string for the class devices name
