Miscellaneous Devices¶
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int
misc_register(struct miscdevice * misc)¶ register a miscellaneous device
Parameters
struct miscdevice * misc- device structure
Description
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 * misc- device to unregister
Description
Unregister a miscellaneous device that was previously successfully registered withmisc_register().