LinuxÇý¶¯Ñ§Ï°¼Ç¼ devfs_mk_cdev
LinuxÇý¶¯Ñ§Ï°¼Ç¼ devfs_mk_cdev
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int register_chrdev (unsigned int major, const char *name, struct file_operations *fops);
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int unregister_chrdev( unsigned int major, const char *name );
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static devfs_handle_t devfs_handle;
devfs_handle = devfs_register( NULL, DEVICE_NAME, DEVFS_FL_DEFAULT,
BUTTON_MAJOR,&sbc2410_buttons_fops, NULL);
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devfs_unregister( devfs_handle);
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int register_chrdev_region( dev_t first, unsigned int count, char *name );
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int alloc_chrdev_region( dev_t *dev, unsigned int firstminor,
unsigned int count, char *name );
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void unregister_chrdev_region( dev_t first, unsigned int count );
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struct cdev *my_cdev = cdev_alloc();
my_cdev->ops = &chr_fops;
void cdev_init( struct cdev *cdev, struct file_operations *fops);
int cdev_add( struct cdev *dev, dev_t num, unsigned int count);
2.6ÄÚºË×Ö·ûÉ豸Çý¶¯ÒƳýÒªÓãº
void cdev_del( struct cdev *dev );
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devfs_mk_cdev( MKDEV(LED_MAJOR, LED_MINOR),
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