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176aa360 CC |
1 | /* |
2 | * External Connector (extcon) framework | |
3 | * - linux/include/linux/extcon-provider.h for extcon provider device driver. | |
4 | * | |
5 | * Copyright (C) 2017 Samsung Electronics | |
6 | * Author: Chanwoo Choi <cw00.choi@samsung.com> | |
7 | * | |
8 | * This software is licensed under the terms of the GNU General Public | |
9 | * License version 2, as published by the Free Software Foundation, and | |
10 | * may be copied, distributed, and modified under those terms. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | */ | |
17 | ||
18 | #ifndef __LINUX_EXTCON_PROVIDER_H__ | |
19 | #define __LINUX_EXTCON_PROVIDER_H__ | |
20 | ||
21 | #include <linux/extcon.h> | |
22 | ||
23 | struct extcon_dev; | |
24 | ||
25 | #if IS_ENABLED(CONFIG_EXTCON) | |
26 | ||
27 | /* Following APIs register/unregister the extcon device. */ | |
28 | extern int extcon_dev_register(struct extcon_dev *edev); | |
29 | extern void extcon_dev_unregister(struct extcon_dev *edev); | |
30 | extern int devm_extcon_dev_register(struct device *dev, | |
31 | struct extcon_dev *edev); | |
32 | extern void devm_extcon_dev_unregister(struct device *dev, | |
33 | struct extcon_dev *edev); | |
34 | ||
35 | /* Following APIs allocate/free the memory of the extcon device. */ | |
36 | extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable); | |
37 | extern void extcon_dev_free(struct extcon_dev *edev); | |
38 | extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev, | |
39 | const unsigned int *cable); | |
40 | extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev); | |
41 | ||
42 | /* Synchronize the state and property value for each external connector. */ | |
43 | extern int extcon_sync(struct extcon_dev *edev, unsigned int id); | |
44 | ||
45 | /* | |
46 | * Following APIs set the connected state of each external connector. | |
47 | * The 'id' argument indicates the defined external connector. | |
48 | */ | |
49 | extern int extcon_set_state(struct extcon_dev *edev, unsigned int id, | |
50 | bool state); | |
51 | extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, | |
52 | bool state); | |
53 | ||
54 | /* | |
55 | * Following APIs set the property of each external connector. | |
56 | * The 'id' argument indicates the defined external connector | |
57 | * and the 'prop' indicates the extcon property. | |
58 | * | |
59 | * And extcon_set_property_capability() set the capability of the property | |
60 | * for each external connector. They are used to set the capability of the | |
61 | * property of each external connector based on the id and property. | |
62 | */ | |
63 | extern int extcon_set_property(struct extcon_dev *edev, unsigned int id, | |
64 | unsigned int prop, | |
65 | union extcon_property_value prop_val); | |
66 | extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id, | |
67 | unsigned int prop, | |
68 | union extcon_property_value prop_val); | |
69 | extern int extcon_set_property_capability(struct extcon_dev *edev, | |
70 | unsigned int id, unsigned int prop); | |
71 | ||
72 | #else /* CONFIG_EXTCON */ | |
73 | static inline int extcon_dev_register(struct extcon_dev *edev) | |
74 | { | |
75 | return 0; | |
76 | } | |
77 | ||
78 | static inline void extcon_dev_unregister(struct extcon_dev *edev) { } | |
79 | ||
80 | static inline int devm_extcon_dev_register(struct device *dev, | |
81 | struct extcon_dev *edev) | |
82 | { | |
83 | return -EINVAL; | |
84 | } | |
85 | ||
86 | static inline void devm_extcon_dev_unregister(struct device *dev, | |
87 | struct extcon_dev *edev) { } | |
88 | ||
89 | static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable) | |
90 | { | |
91 | return ERR_PTR(-ENOSYS); | |
92 | } | |
93 | ||
94 | static inline void extcon_dev_free(struct extcon_dev *edev) { } | |
95 | ||
96 | static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev, | |
97 | const unsigned int *cable) | |
98 | { | |
99 | return ERR_PTR(-ENOSYS); | |
100 | } | |
101 | ||
102 | static inline void devm_extcon_dev_free(struct extcon_dev *edev) { } | |
103 | ||
104 | ||
105 | static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id, | |
106 | bool state) | |
107 | { | |
108 | return 0; | |
109 | } | |
110 | ||
111 | static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, | |
112 | bool state) | |
113 | { | |
114 | return 0; | |
115 | } | |
116 | ||
117 | static inline int extcon_sync(struct extcon_dev *edev, unsigned int id) | |
118 | { | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static inline int extcon_set_property(struct extcon_dev *edev, unsigned int id, | |
123 | unsigned int prop, | |
124 | union extcon_property_value prop_val) | |
125 | { | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static inline int extcon_set_property_sync(struct extcon_dev *edev, | |
130 | unsigned int id, unsigned int prop, | |
131 | union extcon_property_value prop_val) | |
132 | { | |
133 | return 0; | |
134 | } | |
135 | ||
136 | static inline int extcon_set_property_capability(struct extcon_dev *edev, | |
137 | unsigned int id, unsigned int prop) | |
138 | { | |
139 | return 0; | |
140 | } | |
141 | #endif /* CONFIG_EXTCON */ | |
142 | #endif /* __LINUX_EXTCON_PROVIDER_H__ */ |