3  * class.c - basic device class management
32 		ret = class_attr->show(cp->class, class_attr, buf);  in class_attr_show()
44 		ret = class_attr->store(cp->class, class_attr, buf, count);  in class_attr_store()
51 	struct class *class = cp->class;  in class_release()  local
53 	pr_debug("class '%s': release.\n", class->name);  in class_release()
55 	if (class->class_release)  in class_release()
56 		class->class_release(class);  in class_release()
58 		pr_debug("class '%s' does not have a release() function, "  in class_release()
59 			 "be careful\n", class->name);  in class_release()
67 	struct class *class = cp->class;  in class_child_ns_type()  local
69 	return class->ns_type;  in class_child_ns_type()
83 /* Hotplug events for classes go to the class subsys */
87 int class_create_file_ns(struct class *cls, const struct class_attribute *attr,  in class_create_file_ns()
100 void class_remove_file_ns(struct class *cls, const struct class_attribute *attr,  in class_remove_file_ns()
107 static struct class *class_get(struct class *cls)  in class_get()
114 static void class_put(struct class *cls)  in class_put()
134 static int class_add_groups(struct class *cls,  in class_add_groups()
140 static void class_remove_groups(struct class *cls,  in class_remove_groups()
146 int __class_register(struct class *cls, struct lock_class_key *key)  in __class_register()
151 	pr_debug("device class '%s': registering\n", cls->name);  in __class_register()
166 	/* set the default /sys/dev directory for devices of this class */  in __class_register()
171 	/* let the block class directory show up in the root of sysfs */  in __class_register()
178 	cp->class = cls;  in __class_register()
192 void class_unregister(struct class *cls)  in class_unregister()
194 	pr_debug("device class '%s': unregistering\n", cls->name);  in class_unregister()
199 static void class_create_release(struct class *cls)  in class_create_release()
206  * class_create - create a struct class structure
207  * @owner: pointer to the module that is to "own" this struct class
208  * @name: pointer to a string for the name of this class.
209  * @key: the lock_class_key for this class; used by mutex lock debugging
211  * This is used to create a struct class pointer that can then be used
214  * Returns &struct class pointer on success, or ERR_PTR() on error.
219 struct class *__class_create(struct module *owner, const char *name,  in __class_create()
222 	struct class *cls;  in __class_create()
248  * class_destroy - destroys a struct class structure
249  * @cls: pointer to the struct class that is to be destroyed
254 void class_destroy(struct class *cls)  in class_destroy()
263  * class_dev_iter_init - initialize class device iterator
264  * @iter: class iterator to initialize
265  * @class: the class we wanna iterate over
269  * Initialize class iterator @iter such that it iterates over devices
270  * of @class.  If @start is set, the list iteration will start there,
274 void class_dev_iter_init(struct class_dev_iter *iter, struct class *class,  in class_dev_iter_init()  argument
281 	klist_iter_init_node(&class->p->klist_devices, &iter->ki, start_knode);  in class_dev_iter_init()
288  * @iter: class iterator to proceed
296  * calling back into class code.
316  * @iter: class iterator to finish
329  * @class: the class we're iterating
334  * Iterate over @class's list of devices, and call @fn for each,
342  * @fn is allowed to do anything including calling back into class
345 int class_for_each_device(struct class *class, struct device *start,  in class_for_each_device()  argument
352 	if (!class)  in class_for_each_device()
354 	if (!class->p) {  in class_for_each_device()
355 		WARN(1, "%s called for class '%s' before it was initialized",  in class_for_each_device()
356 		     __func__, class->name);  in class_for_each_device()
360 	class_dev_iter_init(&iter, class, start, NULL);  in class_for_each_device()
374  * @class: the class we're iterating
389  * @match is allowed to do anything including calling back into class
392 struct device *class_find_device(struct class *class, struct device *start,  in class_find_device()  argument
399 	if (!class)  in class_find_device()
401 	if (!class->p) {  in class_find_device()
402 		WARN(1, "%s called for class '%s' before it was initialized",  in class_find_device()
403 		     __func__, class->name);  in class_find_device()
407 	class_dev_iter_init(&iter, class, start, NULL);  in class_find_device()
422 	struct class *parent;  in class_interface_register()
426 	if (!class_intf || !class_intf->class)  in class_interface_register()
429 	parent = class_get(class_intf->class);  in class_interface_register()
448 	struct class *parent = class_intf->class;  in class_interface_unregister()
468 ssize_t show_class_attr_string(struct class *class,  in show_class_attr_string()  argument
484  * class_compat_register - register a compatibility class
485  * @name: the name of the class
487  * Compatibility class are meant as a temporary user-space compatibility
488  * workaround when converting a family of class devices to a bus devices.
507  * class_compat_unregister - unregister a compatibility class
508  * @cls: the class to unregister
518  * class_compat_create_link - create a compatibility class device link to
520  * @cls: the compatibility class
535 	 * class device would have one and we want to provide as much  in class_compat_create_link()
550  * class_compat_remove_link - remove a compatibility class device link to
552  * @cls: the compatibility class
568 	class_kset = kset_create_and_add("class", NULL, NULL);  in classes_init()