[deliverable/linux.git] / include / linux / extcon.h

/*
 *  External connector (extcon) class driver
 *
 * Copyright (C) 2015 Samsung Electronics
 * Author: Chanwoo Choi <cw00.choi@samsung.com>
 *
 * Copyright (C) 2012 Samsung Electronics
 * Author: Donggeun Kim <dg77.kim@samsung.com>
 * Author: MyungJoo Ham <myungjoo.ham@samsung.com>
 *
 * based on switch class driver
 * Copyright (C) 2008 Google, Inc.
 * Author: Mike Lockwood <lockwood@android.com>
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
*/

#ifndef __LINUX_EXTCON_H__
#define __LINUX_EXTCON_H__

#include <linux/device.h>

/*
 * Define the unique id of supported external connectors
 */
#define EXTCON_NONE			0

#define EXTCON_USB			1	/* USB connector */
#define EXTCON_USB_HOST			2

#define EXTCON_TA			3	/* Charger connector */
#define EXTCON_FAST_CHARGER		4
#define EXTCON_SLOW_CHARGER		5
#define EXTCON_CHARGE_DOWNSTREAM	6

#define EXTCON_LINE_IN			7	/* Audio/Video connector */
#define EXTCON_LINE_OUT			8
#define EXTCON_MICROPHONE		9
#define EXTCON_HEADPHONE		10
#define EXTCON_HDMI			11
#define EXTCON_MHL			12
#define EXTCON_DVI			13
#define EXTCON_VGA			14
#define EXTCON_SPDIF_IN			15
#define EXTCON_SPDIF_OUT		16
#define EXTCON_VIDEO_IN			17
#define EXTCON_VIDEO_OUT		18

#define EXTCON_DOCK			19	/* Misc connector */
#define EXTCON_JIG			20
#define EXTCON_MECHANICAL		21

struct extcon_cable;

/**
 * struct extcon_dev - An extcon device represents one external connector.
 * @name:		The name of this extcon device. Parent device name is
 *			used if NULL.
 * @supported_cable:	Array of supported cable names ending with EXTCON_NONE.
 *			If supported_cable is NULL, cable name related APIs
 *			are disabled.
 * @mutually_exclusive:	Array of mutually exclusive set of cables that cannot
 *			be attached simultaneously. The array should be
 *			ending with NULL or be NULL (no mutually exclusive
 *			cables). For example, if it is { 0x7, 0x30, 0}, then,
 *			{0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot
 *			be attached simulataneously. {0x7, 0} is equivalent to
 *			{0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
 *			can be no simultaneous connections.
 * @print_state:	An optional callback to override the method to print the
 *			status of the extcon device.
 * @dev:		Device of this extcon.
 * @state:		Attach/detach state of this extcon. Do not provide at
 *			register-time.
 * @nh:			Notifier for the state change events from this extcon
 * @entry:		To support list of extcon devices so that users can
 *			search for extcon devices based on the extcon name.
 * @lock:
 * @max_supported:	Internal value to store the number of cables.
 * @extcon_dev_type:	Device_type struct to provide attribute_groups
 *			customized for each extcon device.
 * @cables:		Sysfs subdirectories. Each represents one cable.
 *
 * In most cases, users only need to provide "User initializing data" of
 * this struct when registering an extcon. In some exceptional cases,
 * optional callbacks may be needed. However, the values in "internal data"
 * are overwritten by register function.
 */
struct extcon_dev {
	/* Optional user initializing data */
	const char *name;
	const unsigned int *supported_cable;
	const u32 *mutually_exclusive;

	/* Optional callbacks to override class functions */
	ssize_t	(*print_state)(struct extcon_dev *edev, char *buf);

	/* Internal data. Please do not set. */
	struct device dev;
	struct raw_notifier_head *nh;
	struct list_head entry;
	int max_supported;
	spinlock_t lock;	/* could be called by irq handler */
	u32 state;

	/* /sys/class/extcon/.../cable.n/... */
	struct device_type extcon_dev_type;
	struct extcon_cable *cables;

	/* /sys/class/extcon/.../mutually_exclusive/... */
	struct attribute_group attr_g_muex;
	struct attribute **attrs_muex;
	struct device_attribute *d_attrs_muex;
};

/**
 * struct extcon_cable - An internal data for each cable of extcon device.
 * @edev:		The extcon device
 * @cable_index:	Index of this cable in the edev
 * @attr_g:		Attribute group for the cable
 * @attr_name:		"name" sysfs entry
 * @attr_state:		"state" sysfs entry
 * @attrs:		Array pointing to attr_name and attr_state for attr_g
 */
struct extcon_cable {
	struct extcon_dev *edev;
	int cable_index;

	struct attribute_group attr_g;
	struct device_attribute attr_name;
	struct device_attribute attr_state;

	struct attribute *attrs[3]; /* to be fed to attr_g.attrs */
};

/**
 * struct extcon_specific_cable_nb - An internal data for
 *				     extcon_register_interest().
 * @user_nb:		user provided notifier block for events from
 *			a specific cable.
 * @cable_index:	the target cable.
 * @edev:		the target extcon device.
 * @previous_value:	the saved previous event value.
 */
struct extcon_specific_cable_nb {
	struct notifier_block *user_nb;
	int cable_index;
	struct extcon_dev *edev;
	unsigned long previous_value;
};

#if IS_ENABLED(CONFIG_EXTCON)

/*
 * Following APIs are for notifiers or configurations.
 * Notifiers are the external port and connection devices.
 */
extern int extcon_dev_register(struct extcon_dev *edev);
extern void extcon_dev_unregister(struct extcon_dev *edev);
extern int devm_extcon_dev_register(struct device *dev,
				    struct extcon_dev *edev);
extern void devm_extcon_dev_unregister(struct device *dev,
				       struct extcon_dev *edev);
extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);

/*
 * Following APIs control the memory of extcon device.
 */
extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable);
extern void extcon_dev_free(struct extcon_dev *edev);
extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
						   const unsigned int *cable);
extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);

/*
 * get/set/update_state access the 32b encoded state value, which represents
 * states of all possible cables of the multistate port. For example, if one
 * calls extcon_set_state(edev, 0x7), it may mean that all the three cables
 * are attached to the port.
 */
static inline u32 extcon_get_state(struct extcon_dev *edev)
{
	return edev->state;
}

extern int extcon_set_state(struct extcon_dev *edev, u32 state);
extern int extcon_update_state(struct extcon_dev *edev, u32 mask, u32 state);

/*
 * get/set_cable_state access each bit of the 32b encoded state value.
 * They are used to access the status of each cable based on the cable_name.
 */
extern int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id);
extern int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
				   bool cable_state);

extern int extcon_get_cable_state(struct extcon_dev *edev,
				  const char *cable_name);
extern int extcon_set_cable_state(struct extcon_dev *edev,
				  const char *cable_name, bool cable_state);

/*
 * Following APIs are for notifiees (those who want to be notified)
 * to register a callback for events from a specific cable of the extcon.
 * Notifiees are the connected device drivers wanting to get notified by
 * a specific external port of a connection device.
 */
extern int extcon_register_interest(struct extcon_specific_cable_nb *obj,
				    const char *extcon_name,
				    const char *cable_name,
				    struct notifier_block *nb);
extern int extcon_unregister_interest(struct extcon_specific_cable_nb *nb);

/*
 * Following APIs are to monitor every action of a notifier.
 * Registrar gets notified for every external port of a connection device.
 * Probably this could be used to debug an action of notifier; however,
 * we do not recommend to use this for normal 'notifiee' device drivers who
 * want to be notified by a specific external port of the notifier.
 */
extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
				    struct notifier_block *nb);
extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
				    struct notifier_block *nb);

/*
 * Following API get the extcon device from devicetree.
 * This function use phandle of devicetree to get extcon device directly.
 */
extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
						     int index);

/* Following API to get information of extcon device */
extern const char *extcon_get_edev_name(struct extcon_dev *edev);

#else /* CONFIG_EXTCON */
static inline int extcon_dev_register(struct extcon_dev *edev)
{
	return 0;
}

static inline void extcon_dev_unregister(struct extcon_dev *edev) { }

static inline int devm_extcon_dev_register(struct device *dev,
					   struct extcon_dev *edev)
{
	return -EINVAL;
}

static inline void devm_extcon_dev_unregister(struct device *dev,
					      struct extcon_dev *edev) { }

static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
{
	return ERR_PTR(-ENOSYS);
}

static inline void extcon_dev_free(struct extcon_dev *edev) { }

static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
						const unsigned int *cable)
{
	return ERR_PTR(-ENOSYS);
}

static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }

static inline u32 extcon_get_state(struct extcon_dev *edev)
{
	return 0;
}

static inline int extcon_set_state(struct extcon_dev *edev, u32 state)
{
	return 0;
}

static inline int extcon_update_state(struct extcon_dev *edev, u32 mask,
				       u32 state)
{
	return 0;
}

static inline int extcon_get_cable_state_(struct extcon_dev *edev,
					  unsigned int id)
{
	return 0;
}

static inline int extcon_set_cable_state_(struct extcon_dev *edev,
					  unsigned int id, bool cable_state)
{
	return 0;
}

static inline int extcon_get_cable_state(struct extcon_dev *edev,
			const char *cable_name)
{
	return 0;
}

static inline int extcon_set_cable_state(struct extcon_dev *edev,
			const char *cable_name, int state)
{
	return 0;
}

static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
{
	return NULL;
}

static inline int extcon_register_notifier(struct extcon_dev *edev,
					unsigned int id,
					struct notifier_block *nb)
{
	return 0;
}

static inline int extcon_unregister_notifier(struct extcon_dev *edev,
					unsigned int id,
					struct notifier_block *nb)
{
	return 0;
}

static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
					   const char *extcon_name,
					   const char *cable_name,
					   struct notifier_block *nb)
{
	return 0;
}

static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
						    *obj)
{
	return 0;
}

static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
							    int index)
{
	return ERR_PTR(-ENODEV);
}
#endif /* CONFIG_EXTCON */
#endif /* __LINUX_EXTCON_H__ */
Commit	Line	Data
de55d871 MH	1	/*
	2	* External connector (extcon) class driver
	3	*
2a9de9c0 CC	4	* Copyright (C) 2015 Samsung Electronics
	5	* Author: Chanwoo Choi <cw00.choi@samsung.com>
	6	*
de55d871 MH	7	* Copyright (C) 2012 Samsung Electronics
	8	* Author: Donggeun Kim <dg77.kim@samsung.com>
	9	* Author: MyungJoo Ham <myungjoo.ham@samsung.com>
	10	*
	11	* based on switch class driver
	12	* Copyright (C) 2008 Google, Inc.
	13	* Author: Mike Lockwood <lockwood@android.com>
	14	*
	15	* This software is licensed under the terms of the GNU General Public
	16	* License version 2, as published by the Free Software Foundation, and
	17	* may be copied, distributed, and modified under those terms.
	18	*
	19	* This program is distributed in the hope that it will be useful,
	20	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	* GNU General Public License for more details.
	23	*
	24	*/
	25
	26	#ifndef __LINUX_EXTCON_H__
	27	#define __LINUX_EXTCON_H__
	28
d851718f	29	#include <linux/device.h>
806d9dd7	30
73b6ecdb CC	31	/*
	32	* Define the unique id of supported external connectors
	33	*/
	34	#define EXTCON_NONE 0
	35
	36	#define EXTCON_USB 1 /* USB connector */
	37	#define EXTCON_USB_HOST 2
	38
	39	#define EXTCON_TA 3 /* Charger connector */
	40	#define EXTCON_FAST_CHARGER 4
	41	#define EXTCON_SLOW_CHARGER 5
	42	#define EXTCON_CHARGE_DOWNSTREAM 6
	43
	44	#define EXTCON_LINE_IN 7 /* Audio/Video connector */
	45	#define EXTCON_LINE_OUT 8
	46	#define EXTCON_MICROPHONE 9
	47	#define EXTCON_HEADPHONE 10
	48	#define EXTCON_HDMI 11
	49	#define EXTCON_MHL 12
	50	#define EXTCON_DVI 13
	51	#define EXTCON_VGA 14
	52	#define EXTCON_SPDIF_IN 15
	53	#define EXTCON_SPDIF_OUT 16
	54	#define EXTCON_VIDEO_IN 17
	55	#define EXTCON_VIDEO_OUT 18
	56
	57	#define EXTCON_DOCK 19 /* Misc connector */
	58	#define EXTCON_JIG 20
	59	#define EXTCON_MECHANICAL 21
806d9dd7 MH	60
	61	struct extcon_cable;
	62
de55d871 MH	63	/**
de55d871 MH	64	* struct extcon_dev - An extcon device represents one external connector.
a75e1c73 CC	65	* @name: The name of this extcon device. Parent device name is
a75e1c73 CC	66	* used if NULL.
2a9de9c0	67	* @supported_cable: Array of supported cable names ending with EXTCON_NONE.
806d9dd7 MH	68	* If supported_cable is NULL, cable name related APIs
806d9dd7 MH	69	* are disabled.
df072eb9	70	* @mutually_exclusive: Array of mutually exclusive set of cables that cannot
bde68e60 MH	71	* be attached simultaneously. The array should be
	72	* ending with NULL or be NULL (no mutually exclusive
	73	* cables). For example, if it is { 0x7, 0x30, 0}, then,
	74	* {0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot
	75	* be attached simulataneously. {0x7, 0} is equivalent to
	76	* {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
	77	* can be no simultaneous connections.
df072eb9	78	* @print_state: An optional callback to override the method to print the
a75e1c73	79	* status of the extcon device.
dae61651	80	* @dev: Device of this extcon.
a75e1c73 CC	81	* @state: Attach/detach state of this extcon. Do not provide at
	82	* register-time.
	83	* @nh: Notifier for the state change events from this extcon
b9ec23c0 CC	84	* @entry: To support list of extcon devices so that users can
b9ec23c0 CC	85	* search for extcon devices based on the extcon name.
df072eb9 MH	86	* @lock:
	87	* @max_supported: Internal value to store the number of cables.
	88	* @extcon_dev_type: Device_type struct to provide attribute_groups
806d9dd7	89	* customized for each extcon device.
a75e1c73	90	* @cables: Sysfs subdirectories. Each represents one cable.
de55d871 MH	91	*
	92	* In most cases, users only need to provide "User initializing data" of
	93	* this struct when registering an extcon. In some exceptional cases,
	94	* optional callbacks may be needed. However, the values in "internal data"
	95	* are overwritten by register function.
	96	*/
	97	struct extcon_dev {
a75e1c73 CC	98	/* Optional user initializing data */
a75e1c73 CC	99	const char *name;
73b6ecdb	100	const unsigned int *supported_cable;
a75e1c73	101	const u32 *mutually_exclusive;
de55d871	102
a75e1c73	103	/* Optional callbacks to override class functions */
de55d871 MH	104	ssize_t (print_state)(struct extcon_dev edev, char *buf);
de55d871 MH	105
a75e1c73	106	/* Internal data. Please do not set. */
dae61651	107	struct device dev;
046050f6	108	struct raw_notifier_head *nh;
74c5d09b	109	struct list_head entry;
806d9dd7	110	int max_supported;
a75e1c73 CC	111	spinlock_t lock; /* could be called by irq handler */
a75e1c73 CC	112	u32 state;
806d9dd7 MH	113
	114	/* /sys/class/extcon/.../cable.n/... */
	115	struct device_type extcon_dev_type;
	116	struct extcon_cable *cables;
a75e1c73	117
bde68e60 MH	118	/* /sys/class/extcon/.../mutually_exclusive/... */
	119	struct attribute_group attr_g_muex;
	120	struct attribute **attrs_muex;
	121	struct device_attribute *d_attrs_muex;
806d9dd7 MH	122	};
	123
	124	/**
a75e1c73 CC	125	* struct extcon_cable - An internal data for each cable of extcon device.
a75e1c73 CC	126	* @edev: The extcon device
df072eb9	127	* @cable_index: Index of this cable in the edev
a75e1c73 CC	128	* @attr_g: Attribute group for the cable
	129	* @attr_name: "name" sysfs entry
	130	* @attr_state: "state" sysfs entry
	131	* @attrs: Array pointing to attr_name and attr_state for attr_g
806d9dd7 MH	132	*/
	133	struct extcon_cable {
	134	struct extcon_dev *edev;
	135	int cable_index;
	136
	137	struct attribute_group attr_g;
	138	struct device_attribute attr_name;
	139	struct device_attribute attr_state;
	140
	141	struct attribute attrs[3]; / to be fed to attr_g.attrs */
	142	};
	143
	144	/**
	145	* struct extcon_specific_cable_nb - An internal data for
a75e1c73	146	* extcon_register_interest().
a75e1c73 CC	147	* @user_nb: user provided notifier block for events from
a75e1c73 CC	148	* a specific cable.
df072eb9	149	* @cable_index: the target cable.
a75e1c73	150	* @edev: the target extcon device.
df072eb9	151	* @previous_value: the saved previous event value.
806d9dd7 MH	152	*/
806d9dd7 MH	153	struct extcon_specific_cable_nb {
806d9dd7 MH	154	struct notifier_block *user_nb;
	155	int cable_index;
	156	struct extcon_dev *edev;
	157	unsigned long previous_value;
de55d871 MH	158	};
	159
	160	#if IS_ENABLED(CONFIG_EXTCON)
74c5d09b DK	161
	162	/*
	163	* Following APIs are for notifiers or configurations.
	164	* Notifiers are the external port and connection devices.
	165	*/
42d7d753	166	extern int extcon_dev_register(struct extcon_dev *edev);
de55d871	167	extern void extcon_dev_unregister(struct extcon_dev *edev);
1111244f SW	168	extern int devm_extcon_dev_register(struct device *dev,
	169	struct extcon_dev *edev);
	170	extern void devm_extcon_dev_unregister(struct device *dev,
	171	struct extcon_dev *edev);
74c5d09b	172	extern struct extcon_dev extcon_get_extcon_dev(const char extcon_name);
de55d871	173
a9af6522 CC	174	/*
	175	* Following APIs control the memory of extcon device.
	176	*/
73b6ecdb	177	extern struct extcon_dev extcon_dev_allocate(const unsigned int cable);
a9af6522	178	extern void extcon_dev_free(struct extcon_dev *edev);
739ba1bf	179	extern struct extcon_dev devm_extcon_dev_allocate(struct device dev,
73b6ecdb	180	const unsigned int *cable);
739ba1bf	181	extern void devm_extcon_dev_free(struct device dev, struct extcon_dev edev);
a9af6522	182
806d9dd7 MH	183	/*
	184	* get/set/update_state access the 32b encoded state value, which represents
	185	* states of all possible cables of the multistate port. For example, if one
	186	* calls extcon_set_state(edev, 0x7), it may mean that all the three cables
	187	* are attached to the port.
	188	*/
de55d871 MH	189	static inline u32 extcon_get_state(struct extcon_dev *edev)
	190	{
	191	return edev->state;
	192	}
	193
bde68e60 MH	194	extern int extcon_set_state(struct extcon_dev *edev, u32 state);
bde68e60 MH	195	extern int extcon_update_state(struct extcon_dev *edev, u32 mask, u32 state);
806d9dd7 MH	196
	197	/*
	198	* get/set_cable_state access each bit of the 32b encoded state value.
2a9de9c0	199	* They are used to access the status of each cable based on the cable_name.
806d9dd7	200	*/
73b6ecdb CC	201	extern int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id);
73b6ecdb CC	202	extern int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
806d9dd7 MH	203	bool cable_state);
	204
	205	extern int extcon_get_cable_state(struct extcon_dev *edev,
	206	const char *cable_name);
	207	extern int extcon_set_cable_state(struct extcon_dev *edev,
	208	const char *cable_name, bool cable_state);
	209
	210	/*
	211	* Following APIs are for notifiees (those who want to be notified)
	212	* to register a callback for events from a specific cable of the extcon.
	213	* Notifiees are the connected device drivers wanting to get notified by
	214	* a specific external port of a connection device.
	215	*/
	216	extern int extcon_register_interest(struct extcon_specific_cable_nb *obj,
	217	const char *extcon_name,
	218	const char *cable_name,
	219	struct notifier_block *nb);
	220	extern int extcon_unregister_interest(struct extcon_specific_cable_nb *nb);
74c5d09b DK	221
	222	/*
	223	* Following APIs are to monitor every action of a notifier.
c338bb03	224	* Registrar gets notified for every external port of a connection device.
806d9dd7	225	* Probably this could be used to debug an action of notifier; however,
c338bb03	226	* we do not recommend to use this for normal 'notifiee' device drivers who
806d9dd7	227	* want to be notified by a specific external port of the notifier.
74c5d09b	228	*/
73b6ecdb	229	extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
046050f6	230	struct notifier_block *nb);
73b6ecdb	231	extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
74c5d09b	232	struct notifier_block *nb);
1ad94ffe CC	233
	234	/*
	235	* Following API get the extcon device from devicetree.
	236	* This function use phandle of devicetree to get extcon device directly.
	237	*/
b9ec23c0 CC	238	extern struct extcon_dev extcon_get_edev_by_phandle(struct device dev,
b9ec23c0 CC	239	int index);
707d7550 CC	240
	241	/* Following API to get information of extcon device */
	242	extern const char extcon_get_edev_name(struct extcon_dev edev);
	243
de55d871	244	#else /* CONFIG_EXTCON */
42d7d753	245	static inline int extcon_dev_register(struct extcon_dev *edev)
de55d871 MH	246	{
	247	return 0;
	248	}
	249
	250	static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
	251
1111244f SW	252	static inline int devm_extcon_dev_register(struct device *dev,
	253	struct extcon_dev *edev)
	254	{
	255	return -EINVAL;
	256	}
	257
	258	static inline void devm_extcon_dev_unregister(struct device *dev,
	259	struct extcon_dev *edev) { }
	260
73b6ecdb	261	static inline struct extcon_dev extcon_dev_allocate(const unsigned int cable)
a9af6522 CC	262	{
	263	return ERR_PTR(-ENOSYS);
	264	}
	265
	266	static inline void extcon_dev_free(struct extcon_dev *edev) { }
	267
739ba1bf	268	static inline struct extcon_dev devm_extcon_dev_allocate(struct device dev,
73b6ecdb	269	const unsigned int *cable)
739ba1bf CC	270	{
	271	return ERR_PTR(-ENOSYS);
	272	}
	273
	274	static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
	275
de55d871 MH	276	static inline u32 extcon_get_state(struct extcon_dev *edev)
	277	{
	278	return 0;
	279	}
	280
bde68e60 MH	281	static inline int extcon_set_state(struct extcon_dev *edev, u32 state)
	282	{
	283	return 0;
	284	}
806d9dd7	285
bde68e60	286	static inline int extcon_update_state(struct extcon_dev *edev, u32 mask,
806d9dd7	287	u32 state)
bde68e60 MH	288	{
	289	return 0;
	290	}
806d9dd7	291
806d9dd7	292	static inline int extcon_get_cable_state_(struct extcon_dev *edev,
73b6ecdb	293	unsigned int id)
806d9dd7 MH	294	{
	295	return 0;
	296	}
	297
	298	static inline int extcon_set_cable_state_(struct extcon_dev *edev,
73b6ecdb	299	unsigned int id, bool cable_state)
806d9dd7 MH	300	{
	301	return 0;
	302	}
	303
	304	static inline int extcon_get_cable_state(struct extcon_dev *edev,
	305	const char *cable_name)
	306	{
	307	return 0;
	308	}
	309
	310	static inline int extcon_set_cable_state(struct extcon_dev *edev,
	311	const char *cable_name, int state)
	312	{
	313	return 0;
	314	}
	315
74c5d09b DK	316	static inline struct extcon_dev extcon_get_extcon_dev(const char extcon_name)
	317	{
	318	return NULL;
	319	}
	320
	321	static inline int extcon_register_notifier(struct extcon_dev *edev,
73b6ecdb	322	unsigned int id,
046050f6	323	struct notifier_block *nb)
74c5d09b DK	324	{
	325	return 0;
	326	}
	327
	328	static inline int extcon_unregister_notifier(struct extcon_dev *edev,
73b6ecdb	329	unsigned int id,
046050f6	330	struct notifier_block *nb)
74c5d09b DK	331	{
	332	return 0;
	333	}
	334
806d9dd7 MH	335	static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
	336	const char *extcon_name,
	337	const char *cable_name,
	338	struct notifier_block *nb)
	339	{
	340	return 0;
	341	}
	342
	343	static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
	344	*obj)
	345	{
	346	return 0;
	347	}
1ad94ffe CC	348
	349	static inline struct extcon_dev extcon_get_edev_by_phandle(struct device dev,
	350	int index)
	351	{
	352	return ERR_PTR(-ENODEV);
	353	}
de55d871 MH	354	#endif /* CONFIG_EXTCON */
de55d871 MH	355	#endif /* __LINUX_EXTCON_H__ */