device_destroy - removes a device that was created with device_create() struct class that this device was registered with : the dev_t of the device that was previously registered
device_create - creates a device and registers it with sysfs struct class that this device should be registered to : pointer to the parent struct device of this new device, if any : the dev_t for the char device to be added : the data to be added to the device for callbacks : string for the device's name
This function can be used by char device classes. A struct device will be created in sysfs, registered to the specified class.
A "dev" file will be created, showing the dev_t for the device, if the dev_t is not 0,0. If a pointer to a parent struct device is passed in, the newly created struct device will be a child of that device in sysfs. The pointer to the struct device will be returned from the call. Any further sysfs files that might be required can be created using this pointer.
Note: the struct class passed to this function must have previously been created with a call to class_create().
This call unregisters and cleans up a device that was created with a call to device_create().
1.5.6