7  * subsystem, and only handles one master device, but this doesn't have to be
35 struct master {  struct
47 	struct master *master;  argument
64 	struct master *m = s->private;  in component_devices_show()
69 	seq_printf(s, "%-40s %20s\n", "master name", "status");  in component_devices_show()
109 static void component_master_debugfs_add(struct master *m)  in component_master_debugfs_add()
116 static void component_master_debugfs_del(struct master *m)  in component_master_debugfs_del()
124 static void component_master_debugfs_add(struct master *m)  in component_master_debugfs_add()
127 static void component_master_debugfs_del(struct master *m)  in component_master_debugfs_del()
132 static struct master *__master_find(struct device *dev,  in __master_find()
135 	struct master *m;  in __master_find()
144 static struct component *find_component(struct master *master,  in find_component()  argument
150 		if (c->master && c->master != master)  in find_component()
160 static int find_components(struct master *master)  in find_components()  argument
162 	struct component_match *match = master->match;  in find_components()
168 	 * any components which are found to this master.  in find_components()
174 		dev_dbg(master->dev, "Looking for component %zu\n", i);  in find_components()
179 		c = find_component(master, mc->compare, mc->data);  in find_components()
185 		dev_dbg(master->dev, "found component %s, duplicate %u\n", dev_name(c->dev), !!c->master);  in find_components()
187 		/* Attach this component to the master */  in find_components()
188 		match->compare[i].duplicate = !!c->master;  in find_components()
190 		c->master = master;  in find_components()
195 /* Detach component from associated master */
196 static void remove_component(struct master *master, struct component *c)  in remove_component()  argument
200 	/* Detach the component from this master. */  in remove_component()
201 	for (i = 0; i < master->match->num; i++)  in remove_component()
202 		if (master->match->compare[i].component == c)  in remove_component()
203 			master->match->compare[i].component = NULL;  in remove_component()
207  * Try to bring up a master.  If component is NULL, we're interested in
208  * this master, otherwise it's a component which must be present to try
209  * and bring up the master.
213 static int try_to_bring_up_master(struct master *master,  in try_to_bring_up_master()  argument
218 	dev_dbg(master->dev, "trying to bring up master\n");  in try_to_bring_up_master()
220 	if (find_components(master)) {  in try_to_bring_up_master()
221 		dev_dbg(master->dev, "master has incomplete components\n");  in try_to_bring_up_master()
225 	if (component && component->master != master) {  in try_to_bring_up_master()
226 		dev_dbg(master->dev, "master is not for this component (%s)\n",  in try_to_bring_up_master()
231 	if (!devres_open_group(master->dev, NULL, GFP_KERNEL))  in try_to_bring_up_master()
235 	ret = master->ops->bind(master->dev);  in try_to_bring_up_master()
237 		devres_release_group(master->dev, NULL);  in try_to_bring_up_master()
239 			dev_info(master->dev, "master bind failed: %d\n", ret);  in try_to_bring_up_master()
243 	master->bound = true;  in try_to_bring_up_master()
249 	struct master *m;  in try_to_bring_up_masters()
263 static void take_down_master(struct master *master)  in take_down_master()  argument
265 	if (master->bound) {  in take_down_master()
266 		master->ops->unbind(master->dev);  in take_down_master()
267 		devres_release_group(master->dev, NULL);  in take_down_master()
268 		master->bound = false;  in take_down_master()
272 static void component_match_release(struct device *master,  in component_match_release()  argument
281 			mc->release(master, mc->data);  in component_match_release()
320 void component_match_add_release(struct device *master,  in component_match_add_release()  argument
338 		devres_add(master, match);  in component_match_add_release()
347 		ret = component_match_realloc(master, match, new_size);  in component_match_add_release()
362 static void free_master(struct master *master)  in free_master()  argument
364 	struct component_match *match = master->match;  in free_master()
367 	component_master_debugfs_del(master);  in free_master()
368 	list_del(&master->node);  in free_master()
374 				c->master = NULL;  in free_master()
378 	kfree(master);  in free_master()
385 	struct master *master;  in component_master_add_with_match()  local
393 	master = kzalloc(sizeof(*master), GFP_KERNEL);  in component_master_add_with_match()
394 	if (!master)  in component_master_add_with_match()
397 	master->dev = dev;  in component_master_add_with_match()
398 	master->ops = ops;  in component_master_add_with_match()
399 	master->match = match;  in component_master_add_with_match()
401 	component_master_debugfs_add(master);  in component_master_add_with_match()
404 	list_add(&master->node, &masters);  in component_master_add_with_match()
406 	ret = try_to_bring_up_master(master, NULL);  in component_master_add_with_match()
409 		free_master(master);  in component_master_add_with_match()
420 	struct master *master;  in component_master_del()  local
423 	master = __master_find(dev, ops);  in component_master_del()
424 	if (master) {  in component_master_del()
425 		take_down_master(master);  in component_master_del()
426 		free_master(master);  in component_master_del()
433 	struct master *master, void *data)  in component_unbind()  argument
437 	component->ops->unbind(component->dev, master->dev, data);  in component_unbind()
446 	struct master *master;  in component_unbind_all()  local
452 	master = __master_find(master_dev, NULL);  in component_unbind_all()
453 	if (!master)  in component_unbind_all()
457 	for (i = master->match->num; i--; )  in component_unbind_all()
458 		if (!master->match->compare[i].duplicate) {  in component_unbind_all()
459 			c = master->match->compare[i].component;  in component_unbind_all()
460 			component_unbind(c, master, data);  in component_unbind_all()
465 static int component_bind(struct component *component, struct master *master,  in component_bind()  argument
475 	if (!devres_open_group(master->dev, NULL, GFP_KERNEL))  in component_bind()
484 		devres_release_group(master->dev, NULL);  in component_bind()
488 	dev_dbg(master->dev, "binding %s (ops %ps)\n",  in component_bind()
491 	ret = component->ops->bind(component->dev, master->dev, data);  in component_bind()
502 		devres_remove_group(master->dev, NULL);  in component_bind()
504 		dev_info(master->dev, "bound %s (ops %ps)\n",  in component_bind()
508 		devres_release_group(master->dev, NULL);  in component_bind()
511 			dev_err(master->dev, "failed to bind %s (ops %ps): %d\n",  in component_bind()
520 	struct master *master;  in component_bind_all()  local
527 	master = __master_find(master_dev, NULL);  in component_bind_all()
528 	if (!master)  in component_bind_all()
532 	for (i = 0; i < master->match->num; i++)  in component_bind_all()
533 		if (!master->match->compare[i].duplicate) {  in component_bind_all()
534 			c = master->match->compare[i].component;  in component_bind_all()
535 			ret = component_bind(c, master, data);  in component_bind_all()
542 			if (!master->match->compare[i - 1].duplicate) {  in component_bind_all()
543 				c = master->match->compare[i - 1].component;  in component_bind_all()
544 				component_unbind(c, master, data);  in component_bind_all()
571 		if (component->master)  in component_add()
572 			remove_component(component->master, component);  in component_add()
595 	if (component && component->master) {  in component_del()
596 		take_down_master(component->master);  in component_del()
597 		remove_component(component->master, component);  in component_del()