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TOMOYO Linux Cross Reference
Linux/include/linux/extcon-provider.h

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  1 /* SPDX-License-Identifier: GPL-2.0-only */
  2 /*
  3  * External Connector (extcon) framework
  4  * - linux/include/linux/extcon-provider.h for extcon provider device driver.
  5  *
  6  * Copyright (C) 2017 Samsung Electronics
  7  * Author: Chanwoo Choi <cw00.choi@samsung.com>
  8  */
  9 
 10 #ifndef __LINUX_EXTCON_PROVIDER_H__
 11 #define __LINUX_EXTCON_PROVIDER_H__
 12 
 13 #include <linux/extcon.h>
 14 
 15 struct extcon_dev;
 16 
 17 #if IS_ENABLED(CONFIG_EXTCON)
 18 
 19 /* Following APIs register/unregister the extcon device. */
 20 extern int extcon_dev_register(struct extcon_dev *edev);
 21 extern void extcon_dev_unregister(struct extcon_dev *edev);
 22 extern int devm_extcon_dev_register(struct device *dev,
 23                                 struct extcon_dev *edev);
 24 extern void devm_extcon_dev_unregister(struct device *dev,
 25                                 struct extcon_dev *edev);
 26 
 27 /* Following APIs allocate/free the memory of the extcon device. */
 28 extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable);
 29 extern void extcon_dev_free(struct extcon_dev *edev);
 30 extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
 31                                 const unsigned int *cable);
 32 extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);
 33 
 34 /* Synchronize the state and property value for each external connector. */
 35 extern int extcon_sync(struct extcon_dev *edev, unsigned int id);
 36 
 37 /*
 38  * Following APIs set the connected state of each external connector.
 39  * The 'id' argument indicates the defined external connector.
 40  */
 41 extern int extcon_set_state(struct extcon_dev *edev, unsigned int id,
 42                                 bool state);
 43 extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
 44                                 bool state);
 45 
 46 /*
 47  * Following APIs set the property of each external connector.
 48  * The 'id' argument indicates the defined external connector
 49  * and the 'prop' indicates the extcon property.
 50  *
 51  * And extcon_set_property_capability() set the capability of the property
 52  * for each external connector. They are used to set the capability of the
 53  * property of each external connector based on the id and property.
 54  */
 55 extern int extcon_set_property(struct extcon_dev *edev, unsigned int id,
 56                                 unsigned int prop,
 57                                 union extcon_property_value prop_val);
 58 extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,
 59                                 unsigned int prop,
 60                                 union extcon_property_value prop_val);
 61 extern int extcon_set_property_capability(struct extcon_dev *edev,
 62                                 unsigned int id, unsigned int prop);
 63 
 64 #else /* CONFIG_EXTCON */
 65 static inline int extcon_dev_register(struct extcon_dev *edev)
 66 {
 67         return 0;
 68 }
 69 
 70 static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
 71 
 72 static inline int devm_extcon_dev_register(struct device *dev,
 73                                 struct extcon_dev *edev)
 74 {
 75         return -EINVAL;
 76 }
 77 
 78 static inline void devm_extcon_dev_unregister(struct device *dev,
 79                                 struct extcon_dev *edev) { }
 80 
 81 static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
 82 {
 83         return ERR_PTR(-ENOSYS);
 84 }
 85 
 86 static inline void extcon_dev_free(struct extcon_dev *edev) { }
 87 
 88 static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
 89                                 const unsigned int *cable)
 90 {
 91         return ERR_PTR(-ENOSYS);
 92 }
 93 
 94 static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
 95 
 96 
 97 static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id,
 98                                 bool state)
 99 {
100         return 0;
101 }
102 
103 static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
104                                 bool state)
105 {
106         return 0;
107 }
108 
109 static inline int extcon_sync(struct extcon_dev *edev, unsigned int id)
110 {
111         return 0;
112 }
113 
114 static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id,
115                                 unsigned int prop,
116                                 union extcon_property_value prop_val)
117 {
118         return 0;
119 }
120 
121 static inline int extcon_set_property_sync(struct extcon_dev *edev,
122                                 unsigned int id, unsigned int prop,
123                                 union extcon_property_value prop_val)
124 {
125         return 0;
126 }
127 
128 static inline int extcon_set_property_capability(struct extcon_dev *edev,
129                                 unsigned int id, unsigned int prop)
130 {
131         return 0;
132 }
133 #endif /* CONFIG_EXTCON */
134 #endif /* __LINUX_EXTCON_PROVIDER_H__ */
135 

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