class_device_create — creates a class device and registers it with sysfs
struct class_device * class_device_create
(struct class * cls, struct class_device * parent, dev_t devt, struct device * device, const char * fmt, ...);
pointer to the struct class that this device should be registered to.
pointer to the parent struct class_device of this new device, if any.
the dev_t for the char device to be added.
a pointer to a struct device that is assiociated with this class device.
string for the class device's name
variable arguments
This function can be used by char device classes. A struct class_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 class_device is passed in, the newly created struct class_device will be a child of that device in sysfs. The pointer to the struct class_device will be returned from the call. Any further sysfs files that might be required can be created using this pointer.
the struct class passed to this function must have previously been created with a call to class_create.