__class_create(9) [centos man page]

__CLASS_CREATE(9)					   Device drivers infrastructure					 __CLASS_CREATE(9)

NAME

       __class_create - create a struct class structure

SYNOPSIS

       struct class * __class_create(struct module * owner, const char * name, struct lock_class_key * key);

ARGUMENTS

       owner
	   pointer to the module that is to "own" this struct class

       name
	   pointer to a string for the name of this class.

       key
	   the lock_class_key for this class; used by mutex lock debugging

DESCRIPTION

       This is used to create a struct class pointer that can then be used in calls to device_create.

       Returns struct class pointer on success, or ERR_PTR on error.

       Note, the pointer created here is to be destroyed when finished by making a call to class_destroy.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							 __CLASS_CREATE(9)

STRUCT 
CLASS(9) 					   Device drivers infrastructure					   STRUCT CLASS(9)

NAME

       struct_class - device classes

SYNOPSIS

       struct class {
	 const char * name;
	 struct module * owner;
	 struct class_attribute * class_attrs;
	 struct device_attribute * dev_attrs;
	 const struct attribute_group ** dev_groups;
	 struct bin_attribute * dev_bin_attrs;
	 struct kobject * dev_kobj;
	 int (* dev_uevent) (struct device *dev, struct kobj_uevent_env *env);
	 char *(* devnode) (struct device *dev, umode_t *mode);
	 void (* class_release) (struct class *class);
	 void (* dev_release) (struct device *dev);
	 int (* suspend) (struct device *dev, pm_message_t state);
	 int (* resume) (struct device *dev);
	 const struct kobj_ns_type_operations * ns_type;
	 const void *(* namespace) (struct device *dev);
	 const struct dev_pm_ops * pm;
	 struct subsys_private * p;
       };

MEMBERS

       name
	   Name of the class.

       owner
	   The module owner.

       class_attrs
	   Default attributes of this class.

       dev_attrs
	   Default attributes of the devices belong to the class.

       dev_groups
	   Default attributes of the devices that belong to the class.

       dev_bin_attrs
	   Default binary attributes of the devices belong to the class.

       dev_kobj
	   The kobject that represents this class and links it into the hierarchy.

       dev_uevent
	   Called when a device is added, removed from this class, or a few other things that generate uevents to add the environment variables.

       devnode
	   Callback to provide the devtmpfs.

       class_release
	   Called to release this class.

       dev_release
	   Called to release the device.

       suspend
	   Used to put the device to sleep mode, usually to a low power state.

       resume
	   Used to bring the device from the sleep mode.

       ns_type
	   Callbacks so sysfs can detemine namespaces.

       namespace
	   Namespace of the device belongs to this class.

       pm
	   The default device power management operations of this class.

       p
	   The private data of the driver core, no one other than the driver core can touch this.

DESCRIPTION

       A class is a higher-level view of a device that abstracts out low-level implementation details. Drivers may see a SCSI disk or an ATA disk,
       but, at the class level, they are all simply disks. Classes allow user space to work with devices based on what they do, rather than how
       they are connected or how they work.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							   STRUCT CLASS(9)