常见的设备注册函数

常见的设备注册函数来源: ChinaUnix博客 　日期：2008.07.06 10:49　(共有0条评论) 我要评论 1、register_chrdev

位置：fs/char_dev.c

原型：int register_chrdev(unsigned int major, const char *name,
      const struct file_operations *fops)

说明：
/**
* register_chrdev() - Register a major number for character devices.
* @major: major device number or 0 for dynamic allocation
* @name: name of this range of devices
* @fops: file operations associated with this devices
*
* If @major == 0 this functions will dynamically allocate a major and return
* its number.
*
* If @major > 0 this function will attempt to reserve a device with the given
* major number and will return zero on success.
*
* Returns a -ve errno on failure.
*
* The name of this device has nothing to do with the name of the device in
* /dev. It only helps to keep track of the different owners of devices. If
* your module name has only one type of devices it's ok to use e.g. the name
* of the module here.
*
* This function registers a range of 256 minor numbers. The first minor number
* is 0.
*/
2、register_netdev
位置：net/core/dev.c
原型：int register_netdev(struct net_device *dev)
说明：
/**
* register_netdev - register a network device
* @dev: device to register
*
* Take a completed network device structure and add it to the kernel
* interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier
* chain. 0 is returned on success. A negative errno code is returned
* on a failure to set up the device, or if the name is a duplicate.
*
* This is a wrapper around register_netdevice that takes the rtnl semaphore
* and expands the device name if you passed a format string to
* alloc_netdev.
*/
3、register_framebuffer
位置：driver/video/fbmem.c
原型：int
register_framebuffer(struct fb_info *fb_info)
说明：
/**
* register_framebuffer - registers a frame buffer device
* @fb_info: frame buffer info structure
*
* Registers a frame buffer device @fb_info.
*
* Returns negative errno on error, or zero for success.
*
*/
4、register_sound_dsp
位置：sound/sound_core.c
原型：int register_sound_dsp(const struct file_operations *fops, int dev)
说明：
/**
* register_sound_dsp - register a DSP device
* @fops: File operations for the driver
* @dev: Unit number to allocate
*
* Allocate a DSP device. Unit is the number of the DSP requested.
* Pass -1 to request the next free DSP unit. On success the allocated
* number is returned, on failure a negative error code is returned.
*
* This function allocates both the audio and dsp device entries together
* and will always allocate them as a matching pair - eg dsp3/audio3
*/
5、register_sound_mixer
位置：sound/sound_core.c
原型：int register_sound_mixer(const struct file_operations *fops, int dev)
说明：
/**
* register_sound_mixer - register a mixer device
* @fops: File operations for the driver
* @dev: Unit number to allocate
*
* Allocate a mixer device. Unit is the number of the mixer requested.
* Pass -1 to request the next free mixer unit. On success the allocated
* number is returned, on failure a negative error code is returned.
*/


本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u1/57747/showart_1074074.html