3  * The class-specific portions of the driver model
26  * struct class - device classes
27  * @name:	Name of the class.
29  * @class_groups: Default attributes of this class.
30  * @dev_groups:	Default attributes of the devices that belong to the class.
31  * @dev_kobj:	The kobject that represents this class and links it into the hierarchy.
32  * @dev_uevent:	Called when a device is added, removed from this class, or a
36  * @class_release: Called to release this class.
40  * @namespace:	Namespace of the device belongs to this class.
41  * @get_ownership: Allows class to specify uid/gid of the sysfs directories
42  *		for the devices belonging to the class. Usually tied to
44  * @pm:		The default device power management operations of this class.
48  * A class is a higher-level view of a device that abstracts out low-level
50  * at the class level, they are all simply disks. Classes allow user space
54 struct class {  struct
65 	void (*class_release)(struct class *class);  argument
87 extern int __must_check __class_register(struct class *class,  argument
89 extern void class_unregister(struct class *class);
93 #define class_register(class)			\  argument
96 	__class_register(class, &__key);	\
108 				struct class *class,
114 extern int class_for_each_device(struct class *class, struct device *start,
117 extern struct device *class_find_device(struct class *class,
124  * @class: class type
127 static inline struct device *class_find_device_by_name(struct class *class,  in class_find_device_by_name()  argument
130 	return class_find_device(class, NULL, name, device_match_name);  in class_find_device_by_name()
136  * @class: class type
140 class_find_device_by_of_node(struct class *class, const struct device_node *np)  in class_find_device_by_of_node()  argument
142 	return class_find_device(class, NULL, np, device_match_of_node);  in class_find_device_by_of_node()
148  * @class: class type
152 class_find_device_by_fwnode(struct class *class,  in class_find_device_by_fwnode()  argument
155 	return class_find_device(class, NULL, fwnode, device_match_fwnode);  in class_find_device_by_fwnode()
161  * @class: class type
164 static inline struct device *class_find_device_by_devt(struct class *class,  in class_find_device_by_devt()  argument
167 	return class_find_device(class, NULL, &devt, device_match_devt);  in class_find_device_by_devt()
175  * @class: class type
179 class_find_device_by_acpi_dev(struct class *class, const struct acpi_device *adev)  in class_find_device_by_acpi_dev()  argument
181 	return class_find_device(class, NULL, adev, device_match_acpi_dev);  in class_find_device_by_acpi_dev()
185 class_find_device_by_acpi_dev(struct class *class, const void *adev)  in class_find_device_by_acpi_dev()  argument
193 	ssize_t (*show)(struct class *class, struct class_attribute *attr,
195 	ssize_t (*store)(struct class *class, struct class_attribute *attr,
206 extern int __must_check class_create_file_ns(struct class *class,
209 extern void class_remove_file_ns(struct class *class,
213 static inline int __must_check class_create_file(struct class *class,  in class_create_file()  argument
216 	return class_create_file_ns(class, attr, NULL);  in class_create_file()
219 static inline void class_remove_file(struct class *class,  in class_remove_file()  argument
222 	return class_remove_file_ns(class, attr, NULL);  in class_remove_file()
225 /* Simple class attribute that is just a static string */
238 extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
243 	struct class		*class;  member
252 extern struct class * __must_check __class_create(struct module *owner,
255 extern void class_destroy(struct class *cls);
261  * class_create - create a struct class structure
262  * @owner: pointer to the module that is to "own" this struct class
263  * @name: pointer to a string for the name of this class.
265  * This is used to create a struct class pointer that can then be used
268  * Returns &struct class pointer on success, or ERR_PTR() on error.