1 // SPDX-License-Identifier: GPL-2.0-only
3  * drivers/extcon/extcon.c - External Connector (extcon) framework.
33 	unsigned int type;
34 	unsigned int id;
53 		.name = "USB-HOST",
80 		.name = "FAST-CHARGER",
85 		.name = "SLOW-CHARGER",
112 		.name = "LINE-IN",
117 		.name = "LINE-OUT",
122 		.name = "VIDEO-IN",
127 		.name = "VIDEO-OUT",
132 		.name = "SPDIF-IN",
137 		.name = "SPDIF-OUT",
203  * struct extcon_cable - An internal data for an external connector.
214  * @usb_bits:		the bit array of the USB connector property capabilities
215  * @chg_bits:		the bit array of the charger connector property capabilities
216  * @jack_bits:		the bit array of the jack connector property capabilities
217  * @disp_bits:		the bit array of the display connector property capabilities
221 	int cable_index;
246 static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state)  in check_mutually_exclusive()
248 	int i;  in check_mutually_exclusive()
250 	if (!edev->mutually_exclusive)  in check_mutually_exclusive()
253 	for (i = 0; edev->mutually_exclusive[i]; i++) {  in check_mutually_exclusive()
254 		int weight;  in check_mutually_exclusive()
255 		u32 correspondants = new_state & edev->mutually_exclusive[i];  in check_mutually_exclusive()
266 static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id)  in find_cable_index_by_id()
268 	int i;  in find_cable_index_by_id()
270 	/* Find the index of extcon cable in edev->supported_cable */  in find_cable_index_by_id()
271 	for (i = 0; i < edev->max_supported; i++) {  in find_cable_index_by_id()
272 		if (edev->supported_cable[i] == id)  in find_cable_index_by_id()
276 	return -EINVAL;  in find_cable_index_by_id()
279 static int get_extcon_type(unsigned int prop)  in get_extcon_type()
291 		return -EINVAL;  in get_extcon_type()
295 static bool is_extcon_attached(struct extcon_dev *edev, unsigned int index)  in is_extcon_attached()
297 	return !!(edev->state & BIT(index));  in is_extcon_attached()
300 static bool is_extcon_changed(struct extcon_dev *edev, int index,  in is_extcon_changed()
303 	int state = !!(edev->state & BIT(index));  in is_extcon_changed()
307 static bool is_extcon_property_supported(unsigned int id, unsigned int prop)  in is_extcon_property_supported()
309 	int type;  in is_extcon_property_supported()
311 	/* Check whether the property is supported or not. */  in is_extcon_property_supported()
316 	/* Check whether a specific extcon id supports the property or not. */  in is_extcon_property_supported()
320 static int is_extcon_property_capability(struct extcon_dev *edev,  in is_extcon_property_capability()
321 				unsigned int id, int index,unsigned int prop)  in is_extcon_property_capability()
324 	int type, ret;  in is_extcon_property_capability()
326 	/* Check whether the property is supported or not. */  in is_extcon_property_capability()
331 	cable = &edev->cables[index];  in is_extcon_property_capability()
335 		ret = test_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits);  in is_extcon_property_capability()
338 		ret = test_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits);  in is_extcon_property_capability()
341 		ret = test_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits);  in is_extcon_property_capability()
344 		ret = test_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits);  in is_extcon_property_capability()
347 		ret = -EINVAL;  in is_extcon_property_capability()
353 static void init_property(struct extcon_dev *edev, unsigned int id, int index)  in init_property()
355 	unsigned int type = extcon_info[id].type;  in init_property()
356 	struct extcon_cable *cable = &edev->cables[index];  in init_property()
359 		memset(cable->usb_propval, 0, sizeof(cable->usb_propval));  in init_property()
361 		memset(cable->chg_propval, 0, sizeof(cable->chg_propval));  in init_property()
363 		memset(cable->jack_propval, 0, sizeof(cable->jack_propval));  in init_property()
365 		memset(cable->disp_propval, 0, sizeof(cable->disp_propval));  in init_property()
371 	int i, count = 0;  in state_show()
374 	if (edev->max_supported == 0)  in state_show()
375 		return sysfs_emit(buf, "%u\n", edev->state);  in state_show()
377 	for (i = 0; i < edev->max_supported; i++) {  in state_show()
379 				       extcon_info[edev->supported_cable[i]].name,  in state_show()
380 				       !!(edev->state & BIT(i)));  in state_show()
392 	return sysfs_emit(buf, "%s\n", edev->name);  in name_show()
401 	int i = cable->cable_index;  in cable_name_show()
404 			  extcon_info[cable->edev->supported_cable[i]].name);  in cable_name_show()
413 	int i = cable->cable_index;  in cable_state_show()
416 			  extcon_get_state(cable->edev, cable->edev->supported_cable[i]));  in cable_state_show()
420  * extcon_sync() - Synchronize the state for an external connector.
425  * the state and property of an external connector.
429 int extcon_sync(struct extcon_dev *edev, unsigned int id)  in extcon_sync()
435 	int env_offset = 0;  in extcon_sync()
436 	int length;  in extcon_sync()
437 	int index;  in extcon_sync()
438 	int state;  in extcon_sync()
442 		return -EINVAL;  in extcon_sync()
448 	spin_lock_irqsave(&edev->lock, flags);  in extcon_sync()
449 	state = !!(edev->state & BIT(index));  in extcon_sync()
450 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_sync()
456 	raw_notifier_call_chain(&edev->nh[index], state, edev);  in extcon_sync()
462 	raw_notifier_call_chain(&edev->nh_all, state, edev);  in extcon_sync()
464 	spin_lock_irqsave(&edev->lock, flags);  in extcon_sync()
469 		spin_unlock_irqrestore(&edev->lock, flags);  in extcon_sync()
471 		dev_err(&edev->dev, "out of memory in extcon_set_state\n");  in extcon_sync()
472 		kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE);  in extcon_sync()
474 		return -ENOMEM;  in extcon_sync()
477 	length = name_show(&edev->dev, NULL, prop_buf);  in extcon_sync()
479 		if (prop_buf[length - 1] == '\n')  in extcon_sync()
480 			prop_buf[length - 1] = 0;  in extcon_sync()
485 	length = state_show(&edev->dev, NULL, prop_buf);  in extcon_sync()
487 		if (prop_buf[length - 1] == '\n')  in extcon_sync()
488 			prop_buf[length - 1] = 0;  in extcon_sync()
495 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_sync()
496 	kobject_uevent_env(&edev->dev.kobj, KOBJ_CHANGE, envp);  in extcon_sync()
504  * extcon_get_state() - Get the state of an external connector.
510 int extcon_get_state(struct extcon_dev *edev, const unsigned int id)  in extcon_get_state()
512 	int index, state;  in extcon_get_state()
516 		return -EINVAL;  in extcon_get_state()
522 	spin_lock_irqsave(&edev->lock, flags);  in extcon_get_state()
524 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_get_state()
531  * extcon_set_state() - Set the state of an external connector.
543 int extcon_set_state(struct extcon_dev *edev, unsigned int id, bool state)  in extcon_set_state()
546 	int index, ret = 0;  in extcon_set_state()
549 		return -EINVAL;  in extcon_set_state()
555 	spin_lock_irqsave(&edev->lock, flags);  in extcon_set_state()
562 		(edev->state & ~BIT(index)) | (state & BIT(index)))) {  in extcon_set_state()
563 		ret = -EPERM;  in extcon_set_state()
568 	 * Initialize the value of extcon property before setting  in extcon_set_state()
576 		edev->state |= BIT(index);  in extcon_set_state()
578 		edev->state &= ~(BIT(index));  in extcon_set_state()
580 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_set_state()
587  * extcon_set_state_sync() - Set the state of an external connector with sync.
598 int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, bool state)  in extcon_set_state_sync()
600 	int ret;  in extcon_set_state_sync()
611  * extcon_get_property() - Get the property value of an external connector.
614  * @prop:	the property id indicating an extcon property
615  * @prop_val:	the pointer which store the value of extcon property
617  * Note that when getting the property value of external connector,
619  * return 0 without property value. Also, the each property should be
624 int extcon_get_property(struct extcon_dev *edev, unsigned int id,  in extcon_get_property()
625 				unsigned int prop,  in extcon_get_property()
630 	int index, ret = 0;  in extcon_get_property()
635 		return -EINVAL;  in extcon_get_property()
637 	/* Check whether the property is supported or not */  in extcon_get_property()
639 		return -EINVAL;  in extcon_get_property()
646 	spin_lock_irqsave(&edev->lock, flags);  in extcon_get_property()
648 	/* Check whether the property is available or not. */  in extcon_get_property()
650 		spin_unlock_irqrestore(&edev->lock, flags);  in extcon_get_property()
651 		return -EPERM;  in extcon_get_property()
657 	 * get the property value.  in extcon_get_property()
660 		spin_unlock_irqrestore(&edev->lock, flags);  in extcon_get_property()
664 	cable = &edev->cables[index];  in extcon_get_property()
666 	/* Get the property value according to extcon type */  in extcon_get_property()
669 		*prop_val = cable->usb_propval[prop - EXTCON_PROP_USB_MIN];  in extcon_get_property()
672 		*prop_val = cable->chg_propval[prop - EXTCON_PROP_CHG_MIN];  in extcon_get_property()
675 		*prop_val = cable->jack_propval[prop - EXTCON_PROP_JACK_MIN];  in extcon_get_property()
678 		*prop_val = cable->disp_propval[prop - EXTCON_PROP_DISP_MIN];  in extcon_get_property()
681 		ret = -EINVAL;  in extcon_get_property()
685 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_get_property()
692  * extcon_set_property() - Set the property value of an external connector.
695  * @prop:	the property id indicating an extcon property
696  * @prop_val:	the pointer including the new value of extcon property
698  * Note that each property should be included in the list of supported
703 int extcon_set_property(struct extcon_dev *edev, unsigned int id,  in extcon_set_property()
704 				unsigned int prop,  in extcon_set_property()
709 	int index, ret = 0;  in extcon_set_property()
712 		return -EINVAL;  in extcon_set_property()
714 	/* Check whether the property is supported or not */  in extcon_set_property()
716 		return -EINVAL;  in extcon_set_property()
723 	spin_lock_irqsave(&edev->lock, flags);  in extcon_set_property()
725 	/* Check whether the property is available or not. */  in extcon_set_property()
727 		spin_unlock_irqrestore(&edev->lock, flags);  in extcon_set_property()
728 		return -EPERM;  in extcon_set_property()
731 	cable = &edev->cables[index];  in extcon_set_property()
733 	/* Set the property value according to extcon type */  in extcon_set_property()
736 		cable->usb_propval[prop - EXTCON_PROP_USB_MIN] = prop_val;  in extcon_set_property()
739 		cable->chg_propval[prop - EXTCON_PROP_CHG_MIN] = prop_val;  in extcon_set_property()
742 		cable->jack_propval[prop - EXTCON_PROP_JACK_MIN] = prop_val;  in extcon_set_property()
745 		cable->disp_propval[prop - EXTCON_PROP_DISP_MIN] = prop_val;  in extcon_set_property()
748 		ret = -EINVAL;  in extcon_set_property()
752 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_set_property()
759  * extcon_set_property_sync() - Set property of an external connector with sync.
762  * @prop:	the property id indicating an extcon property
763  * @prop_val:	the pointer including the new value of extcon property
765  * Note that when setting the property value of external connector,
766  * the external connector should be attached. The each property should
771 int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,  in extcon_set_property_sync()
772 				unsigned int prop,  in extcon_set_property_sync()
775 	int ret;  in extcon_set_property_sync()
786  * extcon_get_property_capability() - Get the capability of the property
790  * @prop:	the property id indicating an extcon property
792  * Returns 1 if the property is available or 0 if not available.
794 int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id,  in extcon_get_property_capability()
795 					unsigned int prop)  in extcon_get_property_capability()
797 	int index;  in extcon_get_property_capability()
800 		return -EINVAL;  in extcon_get_property_capability()
802 	/* Check whether the property is supported or not */  in extcon_get_property_capability()
804 		return -EINVAL;  in extcon_get_property_capability()
816  * extcon_set_property_capability() - Set the capability of the property
820  * @prop:	the property id indicating an extcon property
822  * Note that this function set the capability of the property
824  * bitmap which mean the available state of the property.
828 int extcon_set_property_capability(struct extcon_dev *edev, unsigned int id,  in extcon_set_property_capability()
829 					unsigned int prop)  in extcon_set_property_capability()
832 	int index, type, ret = 0;  in extcon_set_property_capability()
835 		return -EINVAL;  in extcon_set_property_capability()
837 	/* Check whether the property is supported or not. */  in extcon_set_property_capability()
839 		return -EINVAL;  in extcon_set_property_capability()
850 	cable = &edev->cables[index];  in extcon_set_property_capability()
854 		__set_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits);  in extcon_set_property_capability()
857 		__set_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits);  in extcon_set_property_capability()
860 		__set_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits);  in extcon_set_property_capability()
863 		__set_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits);  in extcon_set_property_capability()
866 		ret = -EINVAL;  in extcon_set_property_capability()
874  * extcon_get_extcon_dev() - Get the extcon device instance from the name.
878  * NOTE: This function returns -EPROBE_DEFER so it may only be called from
886 		return ERR_PTR(-EINVAL);  in extcon_get_extcon_dev()
890 		if (!strcmp(sd->name, extcon_name))  in extcon_get_extcon_dev()
893 	sd = ERR_PTR(-EPROBE_DEFER);  in extcon_get_extcon_dev()
901  * extcon_register_notifier() - Register a notifier block to get notified by
913 int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,  in extcon_register_notifier()
917 	int ret, idx;  in extcon_register_notifier()
920 		return -EINVAL;  in extcon_register_notifier()
926 	spin_lock_irqsave(&edev->lock, flags);  in extcon_register_notifier()
927 	ret = raw_notifier_chain_register(&edev->nh[idx], nb);  in extcon_register_notifier()
928 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_register_notifier()
935  * extcon_unregister_notifier() - Unregister a notifier block from the extcon.
942 int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,  in extcon_unregister_notifier()
946 	int ret, idx;  in extcon_unregister_notifier()
949 		return -EINVAL;  in extcon_unregister_notifier()
955 	spin_lock_irqsave(&edev->lock, flags);  in extcon_unregister_notifier()
956 	ret = raw_notifier_chain_unregister(&edev->nh[idx], nb);  in extcon_unregister_notifier()
957 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_unregister_notifier()
964  * extcon_register_notifier_all() - Register a notifier block for all connectors.
975 int extcon_register_notifier_all(struct extcon_dev *edev,  in extcon_register_notifier_all()
979 	int ret;  in extcon_register_notifier_all()
982 		return -EINVAL;  in extcon_register_notifier_all()
984 	spin_lock_irqsave(&edev->lock, flags);  in extcon_register_notifier_all()
985 	ret = raw_notifier_chain_register(&edev->nh_all, nb);  in extcon_register_notifier_all()
986 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_register_notifier_all()
993  * extcon_unregister_notifier_all() - Unregister a notifier block from extcon.
999 int extcon_unregister_notifier_all(struct extcon_dev *edev,  in extcon_unregister_notifier_all()
1003 	int ret;  in extcon_unregister_notifier_all()
1006 		return -EINVAL;  in extcon_unregister_notifier_all()
1008 	spin_lock_irqsave(&edev->lock, flags);  in extcon_unregister_notifier_all()
1009 	ret = raw_notifier_chain_unregister(&edev->nh_all, nb);  in extcon_unregister_notifier_all()
1010 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_unregister_notifier_all()
1023 static int create_extcon_class(void)  in create_extcon_class()
1031 	extcon_class->dev_groups = extcon_groups;  in create_extcon_class()
1046  * extcon_dev_allocate() - Allocate the memory of extcon device.
1056 struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable)  in extcon_dev_allocate()
1061 		return ERR_PTR(-EINVAL);  in extcon_dev_allocate()
1065 		return ERR_PTR(-ENOMEM);  in extcon_dev_allocate()
1067 	edev->max_supported = 0;  in extcon_dev_allocate()
1068 	edev->supported_cable = supported_cable;  in extcon_dev_allocate()
1074  * extcon_dev_free() - Free the memory of extcon device.
1084  * extcon_alloc_cables() - alloc the cables for extcon device
1089 static int extcon_alloc_cables(struct extcon_dev *edev)  in extcon_alloc_cables()
1091 	int index;  in extcon_alloc_cables()
1096 		return -EINVAL;  in extcon_alloc_cables()
1098 	if (!edev->max_supported)  in extcon_alloc_cables()
1101 	edev->cables = kcalloc(edev->max_supported, sizeof(*edev->cables),  in extcon_alloc_cables()
1103 	if (!edev->cables)  in extcon_alloc_cables()
1104 		return -ENOMEM;  in extcon_alloc_cables()
1106 	for (index = 0; index < edev->max_supported; index++) {  in extcon_alloc_cables()
1107 		cable = &edev->cables[index];  in extcon_alloc_cables()
1111 			for (index--; index >= 0; index--) {  in extcon_alloc_cables()
1112 				cable = &edev->cables[index];  in extcon_alloc_cables()
1113 				kfree(cable->attr_g.name);  in extcon_alloc_cables()
1116 			kfree(edev->cables);  in extcon_alloc_cables()
1117 			return -ENOMEM;  in extcon_alloc_cables()
1120 		cable->edev = edev;  in extcon_alloc_cables()
1121 		cable->cable_index = index;  in extcon_alloc_cables()
1122 		cable->attrs[0] = &cable->attr_name.attr;  in extcon_alloc_cables()
1123 		cable->attrs[1] = &cable->attr_state.attr;  in extcon_alloc_cables()
1124 		cable->attrs[2] = NULL;  in extcon_alloc_cables()
1125 		cable->attr_g.name = str;  in extcon_alloc_cables()
1126 		cable->attr_g.attrs = cable->attrs;  in extcon_alloc_cables()
1128 		sysfs_attr_init(&cable->attr_name.attr);  in extcon_alloc_cables()
1129 		cable->attr_name.attr.name = "name";  in extcon_alloc_cables()
1130 		cable->attr_name.attr.mode = 0444;  in extcon_alloc_cables()
1131 		cable->attr_name.show = cable_name_show;  in extcon_alloc_cables()
1133 		sysfs_attr_init(&cable->attr_state.attr);  in extcon_alloc_cables()
1134 		cable->attr_state.attr.name = "state";  in extcon_alloc_cables()
1135 		cable->attr_state.attr.mode = 0444;  in extcon_alloc_cables()
1136 		cable->attr_state.show = cable_state_show;  in extcon_alloc_cables()
1143  * extcon_alloc_muex() - alloc the mutual exclusive for extcon device
1148 static int extcon_alloc_muex(struct extcon_dev *edev)  in extcon_alloc_muex()
1151 	int index;  in extcon_alloc_muex()
1154 		return -EINVAL;  in extcon_alloc_muex()
1156 	if (!(edev->max_supported && edev->mutually_exclusive))  in extcon_alloc_muex()
1160 	for (index = 0; edev->mutually_exclusive[index]; index++)  in extcon_alloc_muex()
1163 	edev->attrs_muex = kcalloc(index + 1, sizeof(*edev->attrs_muex),  in extcon_alloc_muex()
1165 	if (!edev->attrs_muex)  in extcon_alloc_muex()
1166 		return -ENOMEM;  in extcon_alloc_muex()
1168 	edev->d_attrs_muex = kcalloc(index, sizeof(*edev->d_attrs_muex),  in extcon_alloc_muex()
1170 	if (!edev->d_attrs_muex) {  in extcon_alloc_muex()
1171 		kfree(edev->attrs_muex);  in extcon_alloc_muex()
1172 		return -ENOMEM;  in extcon_alloc_muex()
1175 	for (index = 0; edev->mutually_exclusive[index]; index++) {  in extcon_alloc_muex()
1177 				 edev->mutually_exclusive[index]);  in extcon_alloc_muex()
1179 			for (index--; index >= 0; index--)  in extcon_alloc_muex()
1180 				kfree(edev->d_attrs_muex[index].attr.name);  in extcon_alloc_muex()
1182 			kfree(edev->d_attrs_muex);  in extcon_alloc_muex()
1183 			kfree(edev->attrs_muex);  in extcon_alloc_muex()
1184 			return -ENOMEM;  in extcon_alloc_muex()
1186 		sysfs_attr_init(&edev->d_attrs_muex[index].attr);  in extcon_alloc_muex()
1187 		edev->d_attrs_muex[index].attr.name = name;  in extcon_alloc_muex()
1188 		edev->d_attrs_muex[index].attr.mode = 0000;  in extcon_alloc_muex()
1189 		edev->attrs_muex[index] = &edev->d_attrs_muex[index].attr;  in extcon_alloc_muex()
1191 	edev->attr_g_muex.name = muex_name;  in extcon_alloc_muex()
1192 	edev->attr_g_muex.attrs = edev->attrs_muex;  in extcon_alloc_muex()
1198  * extcon_alloc_groups() - alloc the groups for extcon device
1203 static int extcon_alloc_groups(struct extcon_dev *edev)  in extcon_alloc_groups()
1205 	int index;  in extcon_alloc_groups()
1208 		return -EINVAL;  in extcon_alloc_groups()
1210 	if (!edev->max_supported)  in extcon_alloc_groups()
1213 	edev->extcon_dev_type.groups = kcalloc(edev->max_supported + 2,  in extcon_alloc_groups()
1214 					  sizeof(*edev->extcon_dev_type.groups),  in extcon_alloc_groups()
1216 	if (!edev->extcon_dev_type.groups)  in extcon_alloc_groups()
1217 		return -ENOMEM;  in extcon_alloc_groups()
1219 	edev->extcon_dev_type.name = dev_name(&edev->dev);  in extcon_alloc_groups()
1220 	edev->extcon_dev_type.release = dummy_sysfs_dev_release;  in extcon_alloc_groups()
1222 	for (index = 0; index < edev->max_supported; index++)  in extcon_alloc_groups()
1223 		edev->extcon_dev_type.groups[index] = &edev->cables[index].attr_g;  in extcon_alloc_groups()
1225 	if (edev->mutually_exclusive)  in extcon_alloc_groups()
1226 		edev->extcon_dev_type.groups[index] = &edev->attr_g_muex;  in extcon_alloc_groups()
1228 	edev->dev.type = &edev->extcon_dev_type;  in extcon_alloc_groups()
1234  * extcon_dev_register() - Register an new extcon device
1247 int extcon_dev_register(struct extcon_dev *edev)  in extcon_dev_register()
1249 	int ret, index;  in extcon_dev_register()
1255 	if (!edev || !edev->supported_cable)  in extcon_dev_register()
1256 		return -EINVAL;  in extcon_dev_register()
1258 	for (index = 0; edev->supported_cable[index] != EXTCON_NONE; index++);  in extcon_dev_register()
1260 	edev->max_supported = index;  in extcon_dev_register()
1262 		dev_err(&edev->dev,  in extcon_dev_register()
1264 		return -EINVAL;  in extcon_dev_register()
1267 	edev->dev.class = extcon_class;  in extcon_dev_register()
1268 	edev->dev.release = extcon_dev_release;  in extcon_dev_register()
1270 	edev->name = dev_name(edev->dev.parent);  in extcon_dev_register()
1271 	if (IS_ERR_OR_NULL(edev->name)) {  in extcon_dev_register()
1272 		dev_err(&edev->dev,  in extcon_dev_register()
1274 		return -EINVAL;  in extcon_dev_register()
1281 	edev->id = ret;  in extcon_dev_register()
1295 	spin_lock_init(&edev->lock);  in extcon_dev_register()
1296 	if (edev->max_supported) {  in extcon_dev_register()
1297 		edev->nh = kcalloc(edev->max_supported, sizeof(*edev->nh),  in extcon_dev_register()
1299 		if (!edev->nh) {  in extcon_dev_register()
1300 			ret = -ENOMEM;  in extcon_dev_register()
1305 	for (index = 0; index < edev->max_supported; index++)  in extcon_dev_register()
1306 		RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]);  in extcon_dev_register()
1308 	RAW_INIT_NOTIFIER_HEAD(&edev->nh_all);  in extcon_dev_register()
1310 	dev_set_drvdata(&edev->dev, edev);  in extcon_dev_register()
1311 	dev_set_name(&edev->dev, "extcon%d", edev->id);  in extcon_dev_register()
1312 	edev->state = 0;  in extcon_dev_register()
1314 	ret = device_register(&edev->dev);  in extcon_dev_register()
1316 		put_device(&edev->dev);  in extcon_dev_register()
1321 	list_add(&edev->entry, &extcon_dev_list);  in extcon_dev_register()
1327 	if (edev->max_supported)  in extcon_dev_register()
1328 		kfree(edev->nh);  in extcon_dev_register()
1330 	if (edev->max_supported)  in extcon_dev_register()
1331 		kfree(edev->extcon_dev_type.groups);  in extcon_dev_register()
1333 	if (edev->max_supported && edev->mutually_exclusive) {  in extcon_dev_register()
1334 		for (index = 0; edev->mutually_exclusive[index]; index++)  in extcon_dev_register()
1335 			kfree(edev->d_attrs_muex[index].attr.name);  in extcon_dev_register()
1336 		kfree(edev->d_attrs_muex);  in extcon_dev_register()
1337 		kfree(edev->attrs_muex);  in extcon_dev_register()
1340 	for (index = 0; index < edev->max_supported; index++)  in extcon_dev_register()
1341 		kfree(edev->cables[index].attr_g.name);  in extcon_dev_register()
1342 	if (edev->max_supported)  in extcon_dev_register()
1343 		kfree(edev->cables);  in extcon_dev_register()
1345 	ida_free(&extcon_dev_ids, edev->id);  in extcon_dev_register()
1352  * extcon_dev_unregister() - Unregister the extcon device.
1360 	int index;  in extcon_dev_unregister()
1366 	list_del(&edev->entry);  in extcon_dev_unregister()
1369 	if (!get_device(&edev->dev)) {  in extcon_dev_unregister()
1370 		dev_err(&edev->dev, "Failed to unregister extcon_dev\n");  in extcon_dev_unregister()
1374 	ida_free(&extcon_dev_ids, edev->id);  in extcon_dev_unregister()
1376 	device_unregister(&edev->dev);  in extcon_dev_unregister()
1378 	if (edev->mutually_exclusive && edev->max_supported) {  in extcon_dev_unregister()
1379 		for (index = 0; edev->mutually_exclusive[index];  in extcon_dev_unregister()
1381 			kfree(edev->d_attrs_muex[index].attr.name);  in extcon_dev_unregister()
1382 		kfree(edev->d_attrs_muex);  in extcon_dev_unregister()
1383 		kfree(edev->attrs_muex);  in extcon_dev_unregister()
1386 	for (index = 0; index < edev->max_supported; index++)  in extcon_dev_unregister()
1387 		kfree(edev->cables[index].attr_g.name);  in extcon_dev_unregister()
1389 	if (edev->max_supported) {  in extcon_dev_unregister()
1390 		kfree(edev->extcon_dev_type.groups);  in extcon_dev_unregister()
1391 		kfree(edev->cables);  in extcon_dev_unregister()
1392 		kfree(edev->nh);  in extcon_dev_unregister()
1395 	put_device(&edev->dev);  in extcon_dev_unregister()
1402  * extcon_find_edev_by_node - Find the extcon device from devicetree.
1413 		if (edev->dev.parent && device_match_of_node(edev->dev.parent, node))  in extcon_find_edev_by_node()
1415 	edev = ERR_PTR(-EPROBE_DEFER);  in extcon_find_edev_by_node()
1423  * extcon_get_edev_by_phandle - Get the extcon device from devicetree.
1429 struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)  in extcon_get_edev_by_phandle()
1436 		return ERR_PTR(-EINVAL);  in extcon_get_edev_by_phandle()
1442 		return ERR_PTR(-ENODEV);  in extcon_get_edev_by_phandle()
1455 	return ERR_PTR(-ENOSYS);  in extcon_find_edev_by_node()
1458 struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)  in extcon_get_edev_by_phandle()
1460 	return ERR_PTR(-ENOSYS);  in extcon_get_edev_by_phandle()
1469  * extcon_get_edev_name() - Get the name of the extcon device.
1474 	return !edev ? NULL : edev->name;  in extcon_get_edev_name()
1478 static int __init extcon_class_init(void)  in extcon_class_init()