7  * subsystem, and only handles one master device, but this doesn't have to be
61 struct master {  struct
72 	struct master *master;  argument
90 	struct master *m = s->private;  in component_devices_show()
95 	seq_printf(s, "%-40s %20s\n", "master name", "status");  in component_devices_show()
125 static void component_master_debugfs_add(struct master *m)  in component_master_debugfs_add()
131 static void component_master_debugfs_del(struct master *m)  in component_master_debugfs_del()
138 static void component_master_debugfs_add(struct master *m)  in component_master_debugfs_add()
141 static void component_master_debugfs_del(struct master *m)  in component_master_debugfs_del()
146 static struct master *__master_find(struct device *parent,  in __master_find()
149 	struct master *m;  in __master_find()
158 static struct component *find_component(struct master *master,  in find_component()  argument
164 		if (c->master && c->master != master)  in find_component()
178 static int find_components(struct master *master)  in find_components()  argument
180 	struct component_match *match = master->match;  in find_components()
186 	 * any components which are found to this master.  in find_components()
192 		dev_dbg(master->parent, "Looking for component %zu\n", i);  in find_components()
197 		c = find_component(master, mc);  in find_components()
203 		dev_dbg(master->parent, "found component %s, duplicate %u\n", dev_name(c->dev), !!c->master);  in find_components()
205 		/* Attach this component to the master */  in find_components()
206 		match->compare[i].duplicate = !!c->master;  in find_components()
208 		c->master = master;  in find_components()
213 /* Detach component from associated master */
214 static void remove_component(struct master *master, struct component *c)  in remove_component()  argument
218 	/* Detach the component from this master. */  in remove_component()
219 	for (i = 0; i < master->match->num; i++)  in remove_component()
220 		if (master->match->compare[i].component == c)  in remove_component()
221 			master->match->compare[i].component = NULL;  in remove_component()
225  * Try to bring up a master.  If component is NULL, we're interested in
226  * this master, otherwise it's a component which must be present to try
227  * and bring up the master.
231 static int try_to_bring_up_master(struct master *master,  in try_to_bring_up_master()  argument
236 	dev_dbg(master->parent, "trying to bring up master\n");  in try_to_bring_up_master()
238 	if (find_components(master)) {  in try_to_bring_up_master()
239 		dev_dbg(master->parent, "master has incomplete components\n");  in try_to_bring_up_master()
243 	if (component && component->master != master) {  in try_to_bring_up_master()
244 		dev_dbg(master->parent, "master is not for this component (%s)\n",  in try_to_bring_up_master()
249 	if (!devres_open_group(master->parent, NULL, GFP_KERNEL))  in try_to_bring_up_master()
253 	ret = master->ops->bind(master->parent);  in try_to_bring_up_master()
255 		devres_release_group(master->parent, NULL);  in try_to_bring_up_master()
257 			dev_info(master->parent, "master bind failed: %d\n", ret);  in try_to_bring_up_master()
261 	master->bound = true;  in try_to_bring_up_master()
267 	struct master *m;  in try_to_bring_up_masters()
281 static void take_down_master(struct master *master)  in take_down_master()  argument
283 	if (master->bound) {  in take_down_master()
284 		master->ops->unbind(master->parent);  in take_down_master()
285 		devres_release_group(master->parent, NULL);  in take_down_master()
286 		master->bound = false;  in take_down_master()
327 static void __component_match_add(struct device *master,  in __component_match_add()  argument
347 		devres_add(master, match);  in __component_match_add()
373  * @master: device with the aggregate driver
379  * Adds a new component match to the list stored in @matchptr, which the @master
391 void component_match_add_release(struct device *master,  in component_match_add_release()  argument
396 	__component_match_add(master, matchptr, release, compare, NULL,  in component_match_add_release()
403  * @master: device with the aggregate driver
408  * Adds a new component match to the list stored in @matchptr, which the @master
418 void component_match_add_typed(struct device *master,  in component_match_add_typed()  argument
422 	__component_match_add(master, matchptr, NULL, NULL, compare_typed,  in component_match_add_typed()
427 static void free_master(struct master *master)  in free_master()  argument
429 	struct component_match *match = master->match;  in free_master()
432 	component_master_debugfs_del(master);  in free_master()
433 	list_del(&master->node);  in free_master()
439 				c->master = NULL;  in free_master()
443 	kfree(master);  in free_master()
462 	struct master *master;  in component_master_add_with_match()  local
470 	master = kzalloc(sizeof(*master), GFP_KERNEL);  in component_master_add_with_match()
471 	if (!master)  in component_master_add_with_match()
474 	master->parent = parent;  in component_master_add_with_match()
475 	master->ops = ops;  in component_master_add_with_match()
476 	master->match = match;  in component_master_add_with_match()
478 	component_master_debugfs_add(master);  in component_master_add_with_match()
481 	list_add(&master->node, &masters);  in component_master_add_with_match()
483 	ret = try_to_bring_up_master(master, NULL);  in component_master_add_with_match()
486 		free_master(master);  in component_master_add_with_match()
506 	struct master *master;  in component_master_del()  local
509 	master = __master_find(parent, ops);  in component_master_del()
510 	if (master) {  in component_master_del()
511 		take_down_master(master);  in component_master_del()
512 		free_master(master);  in component_master_del()
519 	struct master *master, void *data)  in component_unbind()  argument
524 		component->ops->unbind(component->dev, master->parent, data);  in component_unbind()
542 	struct master *master;  in component_unbind_all()  local
548 	master = __master_find(parent, NULL);  in component_unbind_all()
549 	if (!master)  in component_unbind_all()
553 	for (i = master->match->num; i--; )  in component_unbind_all()
554 		if (!master->match->compare[i].duplicate) {  in component_unbind_all()
555 			c = master->match->compare[i].component;  in component_unbind_all()
556 			component_unbind(c, master, data);  in component_unbind_all()
561 static int component_bind(struct component *component, struct master *master,  in component_bind()  argument
571 	if (!devres_open_group(master->parent, NULL, GFP_KERNEL))  in component_bind()
580 		devres_release_group(master->parent, NULL);  in component_bind()
584 	dev_dbg(master->parent, "binding %s (ops %ps)\n",  in component_bind()
587 	ret = component->ops->bind(component->dev, master->parent, data);  in component_bind()
598 		devres_remove_group(master->parent, NULL);  in component_bind()
600 		dev_info(master->parent, "bound %s (ops %ps)\n",  in component_bind()
604 		devres_release_group(master->parent, NULL);  in component_bind()
607 			dev_err(master->parent, "failed to bind %s (ops %ps): %d\n",  in component_bind()
625 	struct master *master;  in component_bind_all()  local
632 	master = __master_find(parent, NULL);  in component_bind_all()
633 	if (!master)  in component_bind_all()
637 	for (i = 0; i < master->match->num; i++)  in component_bind_all()
638 		if (!master->match->compare[i].duplicate) {  in component_bind_all()
639 			c = master->match->compare[i].component;  in component_bind_all()
640 			ret = component_bind(c, master, data);  in component_bind_all()
647 			if (!master->match->compare[i - 1].duplicate) {  in component_bind_all()
648 				c = master->match->compare[i - 1].component;  in component_bind_all()
649 				component_unbind(c, master, data);  in component_bind_all()
678 		if (component->master)  in __component_add()
679 			remove_component(component->master, component);  in __component_add()
760 	if (component && component->master) {  in component_del()
761 		take_down_master(component->master);  in component_del()
762 		remove_component(component->master, component);  in component_del()