Miscellaneous Devices¶
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int misc_register(struct miscdevice *misc)¶
register a miscellaneous device
Parameters
struct miscdevice *miscdevice structure
Register a miscellaneous device with the kernel. If the minor number is set to
MISC_DYNAMIC_MINORa minor number is assigned and placed in the minor field of the structure. For other cases the minor number requested is used.The structure passed is linked into the kernel and may not be destroyed until it has been unregistered. By default, an open() syscall to the device sets file->private_data to point to the structure. Drivers don’t need open in fops for this.
A zero is returned on success and a negative errno code for failure.
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void misc_deregister(struct miscdevice *misc)¶
unregister a miscellaneous device
Parameters
struct miscdevice *miscdevice to unregister
Unregister a miscellaneous device that was previously successfully registered with
misc_register().