The kernel uses structures of type struct cdev to represent char devices internally. Include <linux/cdev.h> so that you can use the following structures functions. struct cdev *cdev_alloc(void); //allocate a cdev void cdev_init(struct cdev *cdev, st…

转:http://www.linux-mtd.infradead.org/faq/general.html#L_mtd_what Note, you can find Ukranian translation of this page by Alyona Lompar (alyona.lompar@consultant.com) here. We have not assessed the contents, though. Table of contents Is an MTD device…

/** * alloc_chrdev_region() - register a range of char device numbers * @dev: output parameter for first assigned number * @baseminor: first of the requested range of minor numbers * @count: the number of minor numbers required * @name: the name of t…

Linux MTD (Memory Technology Device) subsystem analysis For Atheros char device 读了Linux MTD 源代码分析 对这部分有了整体的认识,结合现有代码,分析一下Atheros的MTD是如何使用的. Linux kernel: 2.6.31. Atheros platform: QCA9890??? 参考Linux MTD 源代码分析,这里把MTD分为4层,从上到下依次是:字符设备节点.字符设备.MTD 核心.FLA…

The Internal Representation of Device Numbers Within the kernel,the dev_t type(defined in linux/types.h ) is used to hold device numbers---both the major and minor parts. it should,instead,make use of a set of macros found in linux/kdev_t.h.To obtain…

遇到一个内核API--cdev_init 就找到这里来了. #ifndef _LINUX_CDEV_H #define _LINUX_CDEV_H #include <linux/kobject.h #include <linux/kdev_t.h> #include <linux/list.h> struct file_operations; struct inode; struct module; struct cdev { struct kobject kobj; st…

快速参考: #include <linux/types.h> dev_t dev_t is the type used to represent device numbers within the kernel. int MAJOR(dev_t dev); int MINOR(dev_t dev); Macros that extract the major and minor numbers from a device number. dev_t MKDEV(unsigned int maj…

来自:http://www.hovercool.com/en/Class_create,_device_create,_device_create_file 开始写Linux设备驱动程序的时候,很多时候都是利用mknod命令手动创建设备节点(包括ldd3中不少例子也是这样),实际上现在Linux内核为我们提供了一组函数,可以用来在模块加载的时候自动在/dev目录下创建相应设备节点,并在卸载模块时删除该节点. 内核中定义了struct class结构体,顾名思义,一个struct class结构体…

来自:http://www.hovercool.com/en/Class_create,_device_create,_device_create_file 开始写Linux设备驱动程序的时候,很多时候都是利用mknod命令手动创建设备节点(包括ldd3中不少例子也是这样),实际上现在Linux内核为我们提供了一组函数,可以用来在模块加载的时候自动在/dev目录下创建相应设备节点,并在卸载模块时删除该节点. 内核中定义了struct class结构体,顾名思义,一个struct class结构体…

“Do you pine for the nice days of Minix-1.1, when men were men and wrote their own device drivers?” Linus Torvalds Pre-requisites In order to develop Linux device drivers, it is necessary to have an understanding of the following: C programming. Some…