[linux-2.6-block.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>
#include <linux/notifier.h>
#include <linux/sysfs.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>
74c5d09b	30	#include <linux/notifier.h>
d851718f	31	#include <linux/sysfs.h>
806d9dd7	32
73b6ecdb CC	33	/*
	34	* Define the unique id of supported external connectors
	35	*/
	36	#define EXTCON_NONE 0
	37
	38	#define EXTCON_USB 1 /* USB connector */
	39	#define EXTCON_USB_HOST 2
	40
	41	#define EXTCON_TA 3 /* Charger connector */
	42	#define EXTCON_FAST_CHARGER 4
	43	#define EXTCON_SLOW_CHARGER 5
	44	#define EXTCON_CHARGE_DOWNSTREAM 6
	45
	46	#define EXTCON_LINE_IN 7 /* Audio/Video connector */
	47	#define EXTCON_LINE_OUT 8
	48	#define EXTCON_MICROPHONE 9
	49	#define EXTCON_HEADPHONE 10
	50	#define EXTCON_HDMI 11
	51	#define EXTCON_MHL 12
	52	#define EXTCON_DVI 13
	53	#define EXTCON_VGA 14
	54	#define EXTCON_SPDIF_IN 15
	55	#define EXTCON_SPDIF_OUT 16
	56	#define EXTCON_VIDEO_IN 17
	57	#define EXTCON_VIDEO_OUT 18
	58
	59	#define EXTCON_DOCK 19 /* Misc connector */
	60	#define EXTCON_JIG 20
	61	#define EXTCON_MECHANICAL 21
806d9dd7 MH	62
	63	struct extcon_cable;
	64
de55d871 MH	65	/**
de55d871 MH	66	* struct extcon_dev - An extcon device represents one external connector.
a75e1c73 CC	67	* @name: The name of this extcon device. Parent device name is
a75e1c73 CC	68	* used if NULL.
2a9de9c0	69	* @supported_cable: Array of supported cable names ending with EXTCON_NONE.
806d9dd7 MH	70	* If supported_cable is NULL, cable name related APIs
806d9dd7 MH	71	* are disabled.
df072eb9	72	* @mutually_exclusive: Array of mutually exclusive set of cables that cannot
bde68e60 MH	73	* be attached simultaneously. The array should be
	74	* ending with NULL or be NULL (no mutually exclusive
	75	* cables). For example, if it is { 0x7, 0x30, 0}, then,
	76	* {0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot
	77	* be attached simulataneously. {0x7, 0} is equivalent to
	78	* {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
	79	* can be no simultaneous connections.
df072eb9	80	* @print_state: An optional callback to override the method to print the
a75e1c73	81	* status of the extcon device.
dae61651	82	* @dev: Device of this extcon.
a75e1c73 CC	83	* @state: Attach/detach state of this extcon. Do not provide at
	84	* register-time.
	85	* @nh: Notifier for the state change events from this extcon
b9ec23c0 CC	86	* @entry: To support list of extcon devices so that users can
b9ec23c0 CC	87	* search for extcon devices based on the extcon name.
df072eb9 MH	88	* @lock:
	89	* @max_supported: Internal value to store the number of cables.
	90	* @extcon_dev_type: Device_type struct to provide attribute_groups
806d9dd7	91	* customized for each extcon device.
a75e1c73	92	* @cables: Sysfs subdirectories. Each represents one cable.
de55d871 MH	93	*
	94	* In most cases, users only need to provide "User initializing data" of
	95	* this struct when registering an extcon. In some exceptional cases,
	96	* optional callbacks may be needed. However, the values in "internal data"
	97	* are overwritten by register function.
	98	*/
	99	struct extcon_dev {
a75e1c73 CC	100	/* Optional user initializing data */
a75e1c73 CC	101	const char *name;
73b6ecdb	102	const unsigned int *supported_cable;
a75e1c73	103	const u32 *mutually_exclusive;
de55d871	104
a75e1c73	105	/* Optional callbacks to override class functions */
de55d871 MH	106	ssize_t (print_state)(struct extcon_dev edev, char *buf);
de55d871 MH	107
a75e1c73	108	/* Internal data. Please do not set. */
dae61651	109	struct device dev;
046050f6	110	struct raw_notifier_head *nh;
74c5d09b	111	struct list_head entry;
806d9dd7	112	int max_supported;
a75e1c73 CC	113	spinlock_t lock; /* could be called by irq handler */
a75e1c73 CC	114	u32 state;
806d9dd7 MH	115
	116	/* /sys/class/extcon/.../cable.n/... */
	117	struct device_type extcon_dev_type;
	118	struct extcon_cable *cables;
a75e1c73	119
bde68e60 MH	120	/* /sys/class/extcon/.../mutually_exclusive/... */
	121	struct attribute_group attr_g_muex;
	122	struct attribute **attrs_muex;
	123	struct device_attribute *d_attrs_muex;
806d9dd7 MH	124	};
	125
	126	/**
a75e1c73 CC	127	* struct extcon_cable - An internal data for each cable of extcon device.
a75e1c73 CC	128	* @edev: The extcon device
df072eb9	129	* @cable_index: Index of this cable in the edev
a75e1c73 CC	130	* @attr_g: Attribute group for the cable
	131	* @attr_name: "name" sysfs entry
	132	* @attr_state: "state" sysfs entry
	133	* @attrs: Array pointing to attr_name and attr_state for attr_g
806d9dd7 MH	134	*/
	135	struct extcon_cable {
	136	struct extcon_dev *edev;
	137	int cable_index;
	138
	139	struct attribute_group attr_g;
	140	struct device_attribute attr_name;
	141	struct device_attribute attr_state;
	142
	143	struct attribute attrs[3]; / to be fed to attr_g.attrs */
	144	};
	145
	146	/**
	147	* struct extcon_specific_cable_nb - An internal data for
a75e1c73	148	* extcon_register_interest().
a75e1c73 CC	149	* @user_nb: user provided notifier block for events from
a75e1c73 CC	150	* a specific cable.
df072eb9	151	* @cable_index: the target cable.
a75e1c73	152	* @edev: the target extcon device.
df072eb9	153	* @previous_value: the saved previous event value.
806d9dd7 MH	154	*/
806d9dd7 MH	155	struct extcon_specific_cable_nb {
806d9dd7 MH	156	struct notifier_block *user_nb;
	157	int cable_index;
	158	struct extcon_dev *edev;
	159	unsigned long previous_value;
de55d871 MH	160	};
	161
	162	#if IS_ENABLED(CONFIG_EXTCON)
74c5d09b DK	163
	164	/*
	165	* Following APIs are for notifiers or configurations.
	166	* Notifiers are the external port and connection devices.
	167	*/
42d7d753	168	extern int extcon_dev_register(struct extcon_dev *edev);
de55d871	169	extern void extcon_dev_unregister(struct extcon_dev *edev);
1111244f SW	170	extern int devm_extcon_dev_register(struct device *dev,
	171	struct extcon_dev *edev);
	172	extern void devm_extcon_dev_unregister(struct device *dev,
	173	struct extcon_dev *edev);
74c5d09b	174	extern struct extcon_dev extcon_get_extcon_dev(const char extcon_name);
de55d871	175
a9af6522 CC	176	/*
	177	* Following APIs control the memory of extcon device.
	178	*/
73b6ecdb	179	extern struct extcon_dev extcon_dev_allocate(const unsigned int cable);
a9af6522	180	extern void extcon_dev_free(struct extcon_dev *edev);
739ba1bf	181	extern struct extcon_dev devm_extcon_dev_allocate(struct device dev,
73b6ecdb	182	const unsigned int *cable);
739ba1bf	183	extern void devm_extcon_dev_free(struct device dev, struct extcon_dev edev);
a9af6522	184
806d9dd7 MH	185	/*
	186	* get/set/update_state access the 32b encoded state value, which represents
	187	* states of all possible cables of the multistate port. For example, if one
	188	* calls extcon_set_state(edev, 0x7), it may mean that all the three cables
	189	* are attached to the port.
	190	*/
de55d871 MH	191	static inline u32 extcon_get_state(struct extcon_dev *edev)
	192	{
	193	return edev->state;
	194	}
	195
bde68e60 MH	196	extern int extcon_set_state(struct extcon_dev *edev, u32 state);
bde68e60 MH	197	extern int extcon_update_state(struct extcon_dev *edev, u32 mask, u32 state);
806d9dd7 MH	198
	199	/*
	200	* get/set_cable_state access each bit of the 32b encoded state value.
2a9de9c0	201	* They are used to access the status of each cable based on the cable_name.
806d9dd7	202	*/
73b6ecdb CC	203	extern int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id);
73b6ecdb CC	204	extern int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
806d9dd7 MH	205	bool cable_state);
	206
	207	extern int extcon_get_cable_state(struct extcon_dev *edev,
	208	const char *cable_name);
	209	extern int extcon_set_cable_state(struct extcon_dev *edev,
	210	const char *cable_name, bool cable_state);
	211
	212	/*
	213	* Following APIs are for notifiees (those who want to be notified)
	214	* to register a callback for events from a specific cable of the extcon.
	215	* Notifiees are the connected device drivers wanting to get notified by
	216	* a specific external port of a connection device.
	217	*/
	218	extern int extcon_register_interest(struct extcon_specific_cable_nb *obj,
	219	const char *extcon_name,
	220	const char *cable_name,
	221	struct notifier_block *nb);
	222	extern int extcon_unregister_interest(struct extcon_specific_cable_nb *nb);
74c5d09b DK	223
	224	/*
	225	* Following APIs are to monitor every action of a notifier.
c338bb03	226	* Registrar gets notified for every external port of a connection device.
806d9dd7	227	* Probably this could be used to debug an action of notifier; however,
c338bb03	228	* we do not recommend to use this for normal 'notifiee' device drivers who
806d9dd7	229	* want to be notified by a specific external port of the notifier.
74c5d09b	230	*/
73b6ecdb	231	extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
046050f6	232	struct notifier_block *nb);
73b6ecdb	233	extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
74c5d09b	234	struct notifier_block *nb);
1ad94ffe CC	235
	236	/*
	237	* Following API get the extcon device from devicetree.
	238	* This function use phandle of devicetree to get extcon device directly.
	239	*/
b9ec23c0 CC	240	extern struct extcon_dev extcon_get_edev_by_phandle(struct device dev,
b9ec23c0 CC	241	int index);
707d7550 CC	242
	243	/* Following API to get information of extcon device */
	244	extern const char extcon_get_edev_name(struct extcon_dev edev);
	245
de55d871	246	#else /* CONFIG_EXTCON */
42d7d753	247	static inline int extcon_dev_register(struct extcon_dev *edev)
de55d871 MH	248	{
	249	return 0;
	250	}
	251
	252	static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
	253
1111244f SW	254	static inline int devm_extcon_dev_register(struct device *dev,
	255	struct extcon_dev *edev)
	256	{
	257	return -EINVAL;
	258	}
	259
	260	static inline void devm_extcon_dev_unregister(struct device *dev,
	261	struct extcon_dev *edev) { }
	262
73b6ecdb	263	static inline struct extcon_dev extcon_dev_allocate(const unsigned int cable)
a9af6522 CC	264	{
	265	return ERR_PTR(-ENOSYS);
	266	}
	267
	268	static inline void extcon_dev_free(struct extcon_dev *edev) { }
	269
739ba1bf	270	static inline struct extcon_dev devm_extcon_dev_allocate(struct device dev,
73b6ecdb	271	const unsigned int *cable)
739ba1bf CC	272	{
	273	return ERR_PTR(-ENOSYS);
	274	}
	275
	276	static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
	277
de55d871 MH	278	static inline u32 extcon_get_state(struct extcon_dev *edev)
	279	{
	280	return 0;
	281	}
	282
bde68e60 MH	283	static inline int extcon_set_state(struct extcon_dev *edev, u32 state)
	284	{
	285	return 0;
	286	}
806d9dd7	287
bde68e60	288	static inline int extcon_update_state(struct extcon_dev *edev, u32 mask,
806d9dd7	289	u32 state)
bde68e60 MH	290	{
	291	return 0;
	292	}
806d9dd7	293
806d9dd7	294	static inline int extcon_get_cable_state_(struct extcon_dev *edev,
73b6ecdb	295	unsigned int id)
806d9dd7 MH	296	{
	297	return 0;
	298	}
	299
	300	static inline int extcon_set_cable_state_(struct extcon_dev *edev,
73b6ecdb	301	unsigned int id, bool cable_state)
806d9dd7 MH	302	{
	303	return 0;
	304	}
	305
	306	static inline int extcon_get_cable_state(struct extcon_dev *edev,
	307	const char *cable_name)
	308	{
	309	return 0;
	310	}
	311
	312	static inline int extcon_set_cable_state(struct extcon_dev *edev,
	313	const char *cable_name, int state)
	314	{
	315	return 0;
	316	}
	317
74c5d09b DK	318	static inline struct extcon_dev extcon_get_extcon_dev(const char extcon_name)
	319	{
	320	return NULL;
	321	}
	322
	323	static inline int extcon_register_notifier(struct extcon_dev *edev,
73b6ecdb	324	unsigned int id,
046050f6	325	struct notifier_block *nb)
74c5d09b DK	326	{
	327	return 0;
	328	}
	329
	330	static inline int extcon_unregister_notifier(struct extcon_dev *edev,
73b6ecdb	331	unsigned int id,
046050f6	332	struct notifier_block *nb)
74c5d09b DK	333	{
	334	return 0;
	335	}
	336
806d9dd7 MH	337	static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
	338	const char *extcon_name,
	339	const char *cable_name,
	340	struct notifier_block *nb)
	341	{
	342	return 0;
	343	}
	344
	345	static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
	346	*obj)
	347	{
	348	return 0;
	349	}
1ad94ffe CC	350
	351	static inline struct extcon_dev extcon_get_edev_by_phandle(struct device dev,
	352	int index)
	353	{
	354	return ERR_PTR(-ENODEV);
	355	}
de55d871 MH	356	#endif /* CONFIG_EXTCON */
de55d871 MH	357	#endif /* __LINUX_EXTCON_H__ */