1 // SPDX-License-Identifier: GPL-2.0-only
3  * drivers/extcon/extcon.c - External Connector (extcon) framework.
20 #include <linux/device.h>
33 	unsigned int id;  member
39 		.id = EXTCON_NONE,
46 		.id = EXTCON_USB,
51 		.id = EXTCON_USB_HOST,
52 		.name = "USB-HOST",
58 		.id = EXTCON_CHG_USB_SDP,
63 		.id = EXTCON_CHG_USB_DCP,
68 		.id = EXTCON_CHG_USB_CDP,
73 		.id = EXTCON_CHG_USB_ACA,
78 		.id = EXTCON_CHG_USB_FAST,
79 		.name = "FAST-CHARGER",
83 		.id = EXTCON_CHG_USB_SLOW,
84 		.name = "SLOW-CHARGER",
88 		.id = EXTCON_CHG_WPT,
93 		.id = EXTCON_CHG_USB_PD,
100 		.id = EXTCON_JACK_MICROPHONE,
105 		.id = EXTCON_JACK_HEADPHONE,
110 		.id = EXTCON_JACK_LINE_IN,
111 		.name = "LINE-IN",
115 		.id = EXTCON_JACK_LINE_OUT,
116 		.name = "LINE-OUT",
120 		.id = EXTCON_JACK_VIDEO_IN,
121 		.name = "VIDEO-IN",
125 		.id = EXTCON_JACK_VIDEO_OUT,
126 		.name = "VIDEO-OUT",
130 		.id = EXTCON_JACK_SPDIF_IN,
131 		.name = "SPDIF-IN",
135 		.id = EXTCON_JACK_SPDIF_OUT,
136 		.name = "SPDIF-OUT",
142 		.id = EXTCON_DISP_HDMI,
147 		.id = EXTCON_DISP_MHL,
152 		.id = EXTCON_DISP_DVI,
157 		.id = EXTCON_DISP_VGA,
162 		.id = EXTCON_DISP_DP,
167 		.id = EXTCON_DISP_HMD,
174 		.id = EXTCON_DOCK,
179 		.id = EXTCON_JIG,
184 		.id = EXTCON_MECHANICAL,
192  * struct extcon_cable - An internal data for an external connector.
193  * @edev:		the extcon device
230 	if (!edev->mutually_exclusive)  in check_mutually_exclusive()
233 	for (i = 0; edev->mutually_exclusive[i]; i++) {  in check_mutually_exclusive()
235 		u32 correspondants = new_state & edev->mutually_exclusive[i];  in check_mutually_exclusive()
246 static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id)  in find_cable_index_by_id()  argument
250 	/* Find the the index of extcon cable in edev->supported_cable */  in find_cable_index_by_id()
251 	for (i = 0; i < edev->max_supported; i++) {  in find_cable_index_by_id()
252 		if (edev->supported_cable[i] == id)  in find_cable_index_by_id()
256 	return -EINVAL;  in find_cable_index_by_id()
271 		return -EINVAL;  in get_extcon_type()
277 	return !!(edev->state & BIT(index));  in is_extcon_attached()
283 	int state = !!(edev->state & BIT(index));  in is_extcon_changed()
287 static bool is_extcon_property_supported(unsigned int id, unsigned int prop)  in is_extcon_property_supported()  argument
296 	/* Check whether a specific extcon id supports the property or not. */  in is_extcon_property_supported()
297 	return !!(extcon_info[id].type & type);  in is_extcon_property_supported()
301 				unsigned int id, int index,unsigned int prop)  in is_extcon_property_capability()  argument
311 	cable = &edev->cables[index];  in is_extcon_property_capability()
315 		ret = test_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits);  in is_extcon_property_capability()
318 		ret = test_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits);  in is_extcon_property_capability()
321 		ret = test_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits);  in is_extcon_property_capability()
324 		ret = test_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits);  in is_extcon_property_capability()
327 		ret = -EINVAL;  in is_extcon_property_capability()
333 static void init_property(struct extcon_dev *edev, unsigned int id, int index)  in init_property()  argument
335 	unsigned int type = extcon_info[id].type;  in init_property()
336 	struct extcon_cable *cable = &edev->cables[index];  in init_property()
339 		memset(cable->usb_propval, 0, sizeof(cable->usb_propval));  in init_property()
341 		memset(cable->chg_propval, 0, sizeof(cable->chg_propval));  in init_property()
343 		memset(cable->jack_propval, 0, sizeof(cable->jack_propval));  in init_property()
345 		memset(cable->disp_propval, 0, sizeof(cable->disp_propval));  in init_property()
348 static ssize_t state_show(struct device *dev, struct device_attribute *attr,  in state_show()
354 	if (edev->max_supported == 0)  in state_show()
355 		return sprintf(buf, "%u\n", edev->state);  in state_show()
357 	for (i = 0; i < edev->max_supported; i++) {  in state_show()
359 				extcon_info[edev->supported_cable[i]].name,  in state_show()
360 				 !!(edev->state & BIT(i)));  in state_show()
367 static ssize_t name_show(struct device *dev, struct device_attribute *attr,  in name_show()
372 	return sprintf(buf, "%s\n", edev->name);  in name_show()
376 static ssize_t cable_name_show(struct device *dev,  in cable_name_show()
381 	int i = cable->cable_index;  in cable_name_show()
384 			extcon_info[cable->edev->supported_cable[i]].name);  in cable_name_show()
387 static ssize_t cable_state_show(struct device *dev,  in cable_state_show()
393 	int i = cable->cable_index;  in cable_state_show()
396 		extcon_get_state(cable->edev, cable->edev->supported_cable[i]));  in cable_state_show()
400  * extcon_sync() - Synchronize the state for an external connector.
401  * @edev:	the extcon device
408 int extcon_sync(struct extcon_dev *edev, unsigned int id)  in extcon_sync()  argument
421 		return -EINVAL;  in extcon_sync()
423 	index = find_cable_index_by_id(edev, id);  in extcon_sync()
427 	spin_lock_irqsave(&edev->lock, flags);  in extcon_sync()
428 	state = !!(edev->state & BIT(index));  in extcon_sync()
429 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_sync()
435 	raw_notifier_call_chain(&edev->nh[index], state, edev);  in extcon_sync()
441 	raw_notifier_call_chain(&edev->nh_all, state, edev);  in extcon_sync()
443 	spin_lock_irqsave(&edev->lock, flags);  in extcon_sync()
448 		spin_unlock_irqrestore(&edev->lock, flags);  in extcon_sync()
450 		dev_err(&edev->dev, "out of memory in extcon_set_state\n");  in extcon_sync()
451 		kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE);  in extcon_sync()
453 		return -ENOMEM;  in extcon_sync()
456 	length = name_show(&edev->dev, NULL, prop_buf);  in extcon_sync()
458 		if (prop_buf[length - 1] == '\n')  in extcon_sync()
459 			prop_buf[length - 1] = 0;  in extcon_sync()
464 	length = state_show(&edev->dev, NULL, prop_buf);  in extcon_sync()
466 		if (prop_buf[length - 1] == '\n')  in extcon_sync()
467 			prop_buf[length - 1] = 0;  in extcon_sync()
474 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_sync()
475 	kobject_uevent_env(&edev->dev.kobj, KOBJ_CHANGE, envp);  in extcon_sync()
483  * extcon_get_state() - Get the state of an external connector.
484  * @edev:	the extcon device
485  * @id:		the unique id indicating an external connector
489 int extcon_get_state(struct extcon_dev *edev, const unsigned int id)  in extcon_get_state()  argument
495 		return -EINVAL;  in extcon_get_state()
497 	index = find_cable_index_by_id(edev, id);  in extcon_get_state()
501 	spin_lock_irqsave(&edev->lock, flags);  in extcon_get_state()
503 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_get_state()
510  * extcon_set_state() - Set the state of an external connector.
511  * @edev:	the extcon device
512  * @id:		the unique id indicating an external connector
522 int extcon_set_state(struct extcon_dev *edev, unsigned int id, bool state)  in extcon_set_state()  argument
528 		return -EINVAL;  in extcon_set_state()
530 	index = find_cable_index_by_id(edev, id);  in extcon_set_state()
534 	spin_lock_irqsave(&edev->lock, flags);  in extcon_set_state()
541 		(edev->state & ~BIT(index)) | (state & BIT(index)))) {  in extcon_set_state()
542 		ret = -EPERM;  in extcon_set_state()
551 		init_property(edev, id, index);  in extcon_set_state()
555 		edev->state |= BIT(index);  in extcon_set_state()
557 		edev->state &= ~(BIT(index));  in extcon_set_state()
559 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_set_state()
566  * extcon_set_state_sync() - Set the state of an external connector with sync.
567  * @edev:	the extcon device
568  * @id:		the unique id indicating an external connector
577 int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, bool state)  in extcon_set_state_sync()  argument
582 	index = find_cable_index_by_id(edev, id);  in extcon_set_state_sync()
587 	spin_lock_irqsave(&edev->lock, flags);  in extcon_set_state_sync()
589 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_set_state_sync()
593 	ret = extcon_set_state(edev, id, state);  in extcon_set_state_sync()
597 	return extcon_sync(edev, id);  in extcon_set_state_sync()
602  * extcon_get_property() - Get the property value of an external connector.
603  * @edev:	the extcon device
604  * @id:		the unique id indicating an external connector
605  * @prop:	the property id indicating an extcon property
615 int extcon_get_property(struct extcon_dev *edev, unsigned int id,  in extcon_get_property()  argument
626 		return -EINVAL;  in extcon_get_property()
629 	if (!is_extcon_property_supported(id, prop))  in extcon_get_property()
630 		return -EINVAL;  in extcon_get_property()
632 	/* Find the cable index of external connector by using id */  in extcon_get_property()
633 	index = find_cable_index_by_id(edev, id);  in extcon_get_property()
637 	spin_lock_irqsave(&edev->lock, flags);  in extcon_get_property()
640 	if (!is_extcon_property_capability(edev, id, index, prop)) {  in extcon_get_property()
641 		spin_unlock_irqrestore(&edev->lock, flags);  in extcon_get_property()
642 		return -EPERM;  in extcon_get_property()
651 		spin_unlock_irqrestore(&edev->lock, flags);  in extcon_get_property()
655 	cable = &edev->cables[index];  in extcon_get_property()
660 		*prop_val = cable->usb_propval[prop - EXTCON_PROP_USB_MIN];  in extcon_get_property()
663 		*prop_val = cable->chg_propval[prop - EXTCON_PROP_CHG_MIN];  in extcon_get_property()
666 		*prop_val = cable->jack_propval[prop - EXTCON_PROP_JACK_MIN];  in extcon_get_property()
669 		*prop_val = cable->disp_propval[prop - EXTCON_PROP_DISP_MIN];  in extcon_get_property()
672 		ret = -EINVAL;  in extcon_get_property()
676 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_get_property()
683  * extcon_set_property() - Set the property value of an external connector.
684  * @edev:	the extcon device
685  * @id:		the unique id indicating an external connector
686  * @prop:	the property id indicating an extcon property
694 int extcon_set_property(struct extcon_dev *edev, unsigned int id,  in extcon_set_property()  argument
703 		return -EINVAL;  in extcon_set_property()
706 	if (!is_extcon_property_supported(id, prop))  in extcon_set_property()
707 		return -EINVAL;  in extcon_set_property()
709 	/* Find the cable index of external connector by using id */  in extcon_set_property()
710 	index = find_cable_index_by_id(edev, id);  in extcon_set_property()
714 	spin_lock_irqsave(&edev->lock, flags);  in extcon_set_property()
717 	if (!is_extcon_property_capability(edev, id, index, prop)) {  in extcon_set_property()
718 		spin_unlock_irqrestore(&edev->lock, flags);  in extcon_set_property()
719 		return -EPERM;  in extcon_set_property()
722 	cable = &edev->cables[index];  in extcon_set_property()
727 		cable->usb_propval[prop - EXTCON_PROP_USB_MIN] = prop_val;  in extcon_set_property()
730 		cable->chg_propval[prop - EXTCON_PROP_CHG_MIN] = prop_val;  in extcon_set_property()
733 		cable->jack_propval[prop - EXTCON_PROP_JACK_MIN] = prop_val;  in extcon_set_property()
736 		cable->disp_propval[prop - EXTCON_PROP_DISP_MIN] = prop_val;  in extcon_set_property()
739 		ret = -EINVAL;  in extcon_set_property()
743 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_set_property()
750  * extcon_set_property_sync() - Set property of an external connector with sync.
759 int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,  in extcon_set_property_sync()  argument
765 	ret = extcon_set_property(edev, id, prop, prop_val);  in extcon_set_property_sync()
769 	return extcon_sync(edev, id);  in extcon_set_property_sync()
774  * extcon_get_property_capability() - Get the capability of the property
776  * @edev:	the extcon device
777  * @id:		the unique id indicating an external connector
778  * @prop:	the property id indicating an extcon property
782 int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id,  in extcon_get_property_capability()  argument
788 		return -EINVAL;  in extcon_get_property_capability()
791 	if (!is_extcon_property_supported(id, prop))  in extcon_get_property_capability()
792 		return -EINVAL;  in extcon_get_property_capability()
794 	/* Find the cable index of external connector by using id */  in extcon_get_property_capability()
795 	index = find_cable_index_by_id(edev, id);  in extcon_get_property_capability()
799 	return is_extcon_property_capability(edev, id, index, prop);  in extcon_get_property_capability()
804  * extcon_set_property_capability() - Set the capability of the property
806  * @edev:	the extcon device
807  * @id:		the unique id indicating an external connector
808  * @prop:	the property id indicating an extcon property
816 int extcon_set_property_capability(struct extcon_dev *edev, unsigned int id,  in extcon_set_property_capability()  argument
823 		return -EINVAL;  in extcon_set_property_capability()
826 	if (!is_extcon_property_supported(id, prop))  in extcon_set_property_capability()
827 		return -EINVAL;  in extcon_set_property_capability()
829 	/* Find the cable index of external connector by using id. */  in extcon_set_property_capability()
830 	index = find_cable_index_by_id(edev, id);  in extcon_set_property_capability()
838 	cable = &edev->cables[index];  in extcon_set_property_capability()
842 		__set_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits);  in extcon_set_property_capability()
845 		__set_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits);  in extcon_set_property_capability()
848 		__set_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits);  in extcon_set_property_capability()
851 		__set_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits);  in extcon_set_property_capability()
854 		ret = -EINVAL;  in extcon_set_property_capability()
862  * extcon_get_extcon_dev() - Get the extcon device instance from the name.
865  * Return the pointer of extcon device if success or ERR_PTR(err) if fail.
872 		return ERR_PTR(-EINVAL);  in extcon_get_extcon_dev()
876 		if (!strcmp(sd->name, extcon_name))  in extcon_get_extcon_dev()
887  * extcon_register_notifier() - Register a notifier block to get notified by
889  * @edev:	the extcon device
890  * @id:		the unique id indicating an external connector
895  * is the pointer of extcon device.
899 int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,  in extcon_register_notifier()  argument
906 		return -EINVAL;  in extcon_register_notifier()
908 	idx = find_cable_index_by_id(edev, id);  in extcon_register_notifier()
912 	spin_lock_irqsave(&edev->lock, flags);  in extcon_register_notifier()
913 	ret = raw_notifier_chain_register(&edev->nh[idx], nb);  in extcon_register_notifier()
914 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_register_notifier()
921  * extcon_unregister_notifier() - Unregister a notifier block from the extcon.
922  * @edev:	the extcon device
923  * @id:		the unique id indicating an external connector
928 int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,  in extcon_unregister_notifier()  argument
935 		return -EINVAL;  in extcon_unregister_notifier()
937 	idx = find_cable_index_by_id(edev, id);  in extcon_unregister_notifier()
941 	spin_lock_irqsave(&edev->lock, flags);  in extcon_unregister_notifier()
942 	ret = raw_notifier_chain_unregister(&edev->nh[idx], nb);  in extcon_unregister_notifier()
943 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_unregister_notifier()
950  * extcon_register_notifier_all() - Register a notifier block for all connectors.
951  * @edev:	the extcon device
955  * the state change of all supported external connectors from extcon device.
957  * the current state and the third pameter is the pointer of extcon device.
968 		return -EINVAL;  in extcon_register_notifier_all()
970 	spin_lock_irqsave(&edev->lock, flags);  in extcon_register_notifier_all()
971 	ret = raw_notifier_chain_register(&edev->nh_all, nb);  in extcon_register_notifier_all()
972 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_register_notifier_all()
979  * extcon_unregister_notifier_all() - Unregister a notifier block from extcon.
980  * @edev:	the extcon device
992 		return -EINVAL;  in extcon_unregister_notifier_all()
994 	spin_lock_irqsave(&edev->lock, flags);  in extcon_unregister_notifier_all()
995 	ret = raw_notifier_chain_unregister(&edev->nh_all, nb);  in extcon_unregister_notifier_all()
996 	spin_unlock_irqrestore(&edev->lock, flags);  in extcon_unregister_notifier_all()
1015 		extcon_class->dev_groups = extcon_groups;  in create_extcon_class()
1021 static void extcon_dev_release(struct device *dev)  in extcon_dev_release()
1026 static void dummy_sysfs_dev_release(struct device *dev)  in dummy_sysfs_dev_release()
1031  * extcon_dev_allocate() - Allocate the memory of extcon device.
1035  * Note that this function allocates the memory for extcon device 
1036  * and initialize default setting for the extcon device.
1046 		return ERR_PTR(-EINVAL);  in extcon_dev_allocate()
1050 		return ERR_PTR(-ENOMEM);  in extcon_dev_allocate()
1052 	edev->max_supported = 0;  in extcon_dev_allocate()
1053 	edev->supported_cable = supported_cable;  in extcon_dev_allocate()
1059  * extcon_dev_free() - Free the memory of extcon device.
1060  * @edev:	the extcon device
1069  * extcon_dev_register() - Register an new extcon device
1070  * @edev:	the extcon device to be registered
1077  * of an extcon device by using the extcon_dev_allocate(). And the extcon
1085 	static atomic_t edev_no = ATOMIC_INIT(-1);  in extcon_dev_register()
1093 	if (!edev || !edev->supported_cable)  in extcon_dev_register()
1094 		return -EINVAL;  in extcon_dev_register()
1096 	for (; edev->supported_cable[index] != EXTCON_NONE; index++);  in extcon_dev_register()
1098 	edev->max_supported = index;  in extcon_dev_register()
1100 		dev_err(&edev->dev,  in extcon_dev_register()
1102 		return -EINVAL;  in extcon_dev_register()
1105 	edev->dev.class = extcon_class;  in extcon_dev_register()
1106 	edev->dev.release = extcon_dev_release;  in extcon_dev_register()
1108 	edev->name = dev_name(edev->dev.parent);  in extcon_dev_register()
1109 	if (IS_ERR_OR_NULL(edev->name)) {  in extcon_dev_register()
1110 		dev_err(&edev->dev,  in extcon_dev_register()
1111 			"extcon device name is null\n");  in extcon_dev_register()
1112 		return -EINVAL;  in extcon_dev_register()
1114 	dev_set_name(&edev->dev, "extcon%lu",  in extcon_dev_register()
1117 	if (edev->max_supported) {  in extcon_dev_register()
1121 		edev->cables = kcalloc(edev->max_supported,  in extcon_dev_register()
1124 		if (!edev->cables) {  in extcon_dev_register()
1125 			ret = -ENOMEM;  in extcon_dev_register()
1128 		for (index = 0; index < edev->max_supported; index++) {  in extcon_dev_register()
1129 			cable = &edev->cables[index];  in extcon_dev_register()
1133 				for (index--; index >= 0; index--) {  in extcon_dev_register()
1134 					cable = &edev->cables[index];  in extcon_dev_register()
1135 					kfree(cable->attr_g.name);  in extcon_dev_register()
1137 				ret = -ENOMEM;  in extcon_dev_register()
1142 			cable->edev = edev;  in extcon_dev_register()
1143 			cable->cable_index = index;  in extcon_dev_register()
1144 			cable->attrs[0] = &cable->attr_name.attr;  in extcon_dev_register()
1145 			cable->attrs[1] = &cable->attr_state.attr;  in extcon_dev_register()
1146 			cable->attrs[2] = NULL;  in extcon_dev_register()
1147 			cable->attr_g.name = str;  in extcon_dev_register()
1148 			cable->attr_g.attrs = cable->attrs;  in extcon_dev_register()
1150 			sysfs_attr_init(&cable->attr_name.attr);  in extcon_dev_register()
1151 			cable->attr_name.attr.name = "name";  in extcon_dev_register()
1152 			cable->attr_name.attr.mode = 0444;  in extcon_dev_register()
1153 			cable->attr_name.show = cable_name_show;  in extcon_dev_register()
1155 			sysfs_attr_init(&cable->attr_state.attr);  in extcon_dev_register()
1156 			cable->attr_state.attr.name = "state";  in extcon_dev_register()
1157 			cable->attr_state.attr.mode = 0444;  in extcon_dev_register()
1158 			cable->attr_state.show = cable_state_show;  in extcon_dev_register()
1162 	if (edev->max_supported && edev->mutually_exclusive) {  in extcon_dev_register()
1166 		for (index = 0; edev->mutually_exclusive[index]; index++)  in extcon_dev_register()
1169 		edev->attrs_muex = kcalloc(index + 1,  in extcon_dev_register()
1172 		if (!edev->attrs_muex) {  in extcon_dev_register()
1173 			ret = -ENOMEM;  in extcon_dev_register()
1177 		edev->d_attrs_muex = kcalloc(index,  in extcon_dev_register()
1180 		if (!edev->d_attrs_muex) {  in extcon_dev_register()
1181 			ret = -ENOMEM;  in extcon_dev_register()
1182 			kfree(edev->attrs_muex);  in extcon_dev_register()
1186 		for (index = 0; edev->mutually_exclusive[index]; index++) {  in extcon_dev_register()
1188 					 edev->mutually_exclusive[index]);  in extcon_dev_register()
1190 				for (index--; index >= 0; index--) {  in extcon_dev_register()
1191 					kfree(edev->d_attrs_muex[index].attr.  in extcon_dev_register()
1194 				kfree(edev->d_attrs_muex);  in extcon_dev_register()
1195 				kfree(edev->attrs_muex);  in extcon_dev_register()
1196 				ret = -ENOMEM;  in extcon_dev_register()
1199 			sysfs_attr_init(&edev->d_attrs_muex[index].attr);  in extcon_dev_register()
1200 			edev->d_attrs_muex[index].attr.name = name;  in extcon_dev_register()
1201 			edev->d_attrs_muex[index].attr.mode = 0000;  in extcon_dev_register()
1202 			edev->attrs_muex[index] = &edev->d_attrs_muex[index]  in extcon_dev_register()
1205 		edev->attr_g_muex.name = muex_name;  in extcon_dev_register()
1206 		edev->attr_g_muex.attrs = edev->attrs_muex;  in extcon_dev_register()
1210 	if (edev->max_supported) {  in extcon_dev_register()
1211 		edev->extcon_dev_type.groups =  in extcon_dev_register()
1212 			kcalloc(edev->max_supported + 2,  in extcon_dev_register()
1215 		if (!edev->extcon_dev_type.groups) {  in extcon_dev_register()
1216 			ret = -ENOMEM;  in extcon_dev_register()
1220 		edev->extcon_dev_type.name = dev_name(&edev->dev);  in extcon_dev_register()
1221 		edev->extcon_dev_type.release = dummy_sysfs_dev_release;  in extcon_dev_register()
1223 		for (index = 0; index < edev->max_supported; index++)  in extcon_dev_register()
1224 			edev->extcon_dev_type.groups[index] =  in extcon_dev_register()
1225 				&edev->cables[index].attr_g;  in extcon_dev_register()
1226 		if (edev->mutually_exclusive)  in extcon_dev_register()
1227 			edev->extcon_dev_type.groups[index] =  in extcon_dev_register()
1228 				&edev->attr_g_muex;  in extcon_dev_register()
1230 		edev->dev.type = &edev->extcon_dev_type;  in extcon_dev_register()
1233 	ret = device_register(&edev->dev);  in extcon_dev_register()
1235 		put_device(&edev->dev);  in extcon_dev_register()
1239 	spin_lock_init(&edev->lock);  in extcon_dev_register()
1240 	edev->nh = devm_kcalloc(&edev->dev, edev->max_supported,  in extcon_dev_register()
1241 				sizeof(*edev->nh), GFP_KERNEL);  in extcon_dev_register()
1242 	if (!edev->nh) {  in extcon_dev_register()
1243 		ret = -ENOMEM;  in extcon_dev_register()
1247 	for (index = 0; index < edev->max_supported; index++)  in extcon_dev_register()
1248 		RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]);  in extcon_dev_register()
1250 	RAW_INIT_NOTIFIER_HEAD(&edev->nh_all);  in extcon_dev_register()
1252 	dev_set_drvdata(&edev->dev, edev);  in extcon_dev_register()
1253 	edev->state = 0;  in extcon_dev_register()
1256 	list_add(&edev->entry, &extcon_dev_list);  in extcon_dev_register()
1262 	if (edev->max_supported)  in extcon_dev_register()
1263 		kfree(edev->extcon_dev_type.groups);  in extcon_dev_register()
1265 	if (edev->max_supported && edev->mutually_exclusive) {  in extcon_dev_register()
1266 		for (index = 0; edev->mutually_exclusive[index]; index++)  in extcon_dev_register()
1267 			kfree(edev->d_attrs_muex[index].attr.name);  in extcon_dev_register()
1268 		kfree(edev->d_attrs_muex);  in extcon_dev_register()
1269 		kfree(edev->attrs_muex);  in extcon_dev_register()
1272 	for (index = 0; index < edev->max_supported; index++)  in extcon_dev_register()
1273 		kfree(edev->cables[index].attr_g.name);  in extcon_dev_register()
1275 	if (edev->max_supported)  in extcon_dev_register()
1276 		kfree(edev->cables);  in extcon_dev_register()
1283  * extcon_dev_unregister() - Unregister the extcon device.
1284  * @edev:	the extcon device to be unregistered.
1297 	list_del(&edev->entry);  in extcon_dev_unregister()
1300 	if (IS_ERR_OR_NULL(get_device(&edev->dev))) {  in extcon_dev_unregister()
1301 		dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n",  in extcon_dev_unregister()
1302 				dev_name(&edev->dev));  in extcon_dev_unregister()
1306 	device_unregister(&edev->dev);  in extcon_dev_unregister()
1308 	if (edev->mutually_exclusive && edev->max_supported) {  in extcon_dev_unregister()
1309 		for (index = 0; edev->mutually_exclusive[index];  in extcon_dev_unregister()
1311 			kfree(edev->d_attrs_muex[index].attr.name);  in extcon_dev_unregister()
1312 		kfree(edev->d_attrs_muex);  in extcon_dev_unregister()
1313 		kfree(edev->attrs_muex);  in extcon_dev_unregister()
1316 	for (index = 0; index < edev->max_supported; index++)  in extcon_dev_unregister()
1317 		kfree(edev->cables[index].attr_g.name);  in extcon_dev_unregister()
1319 	if (edev->max_supported) {  in extcon_dev_unregister()
1320 		kfree(edev->extcon_dev_type.groups);  in extcon_dev_unregister()
1321 		kfree(edev->cables);  in extcon_dev_unregister()
1324 	put_device(&edev->dev);  in extcon_dev_unregister()
1331  * extcon_find_edev_by_node - Find the extcon device from devicetree.
1334  * Return the pointer of extcon device if success or ERR_PTR(err) if fail.
1342 		if (edev->dev.parent && edev->dev.parent->of_node == node)  in extcon_find_edev_by_node()
1344 	edev = ERR_PTR(-EPROBE_DEFER);  in extcon_find_edev_by_node()
1352  * extcon_get_edev_by_phandle - Get the extcon device from devicetree.
1353  * @dev		: the instance to the given device
1356  * Return the pointer of extcon device if success or ERR_PTR(err) if fail.
1358 struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)  in extcon_get_edev_by_phandle()
1364 		return ERR_PTR(-EINVAL);  in extcon_get_edev_by_phandle()
1366 	if (!dev->of_node) {  in extcon_get_edev_by_phandle()
1367 		dev_dbg(dev, "device does not have a device node entry\n");  in extcon_get_edev_by_phandle()
1368 		return ERR_PTR(-EINVAL);  in extcon_get_edev_by_phandle()
1371 	node = of_parse_phandle(dev->of_node, "extcon", index);  in extcon_get_edev_by_phandle()
1374 			dev->of_node);  in extcon_get_edev_by_phandle()
1375 		return ERR_PTR(-ENODEV);  in extcon_get_edev_by_phandle()
1388 	return ERR_PTR(-ENOSYS);  in extcon_find_edev_by_node()
1391 struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)  in extcon_get_edev_by_phandle()
1393 	return ERR_PTR(-ENOSYS);  in extcon_get_edev_by_phandle()
1402  * extcon_get_edev_name() - Get the name of the extcon device.
1403  * @edev:	the extcon device
1407 	return !edev ? NULL : edev->name;  in extcon_get_edev_name()