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-rw-r--r--include/linux/extcon.h67
1 files changed, 35 insertions, 32 deletions
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index fcb51c88319f..c2b652dde72c 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -51,10 +51,10 @@
51enum extcon_cable_name { 51enum extcon_cable_name {
52 EXTCON_USB = 0, 52 EXTCON_USB = 0,
53 EXTCON_USB_HOST, 53 EXTCON_USB_HOST,
54 EXTCON_TA, /* Travel Adaptor */ 54 EXTCON_TA, /* Travel Adaptor */
55 EXTCON_FAST_CHARGER, 55 EXTCON_FAST_CHARGER,
56 EXTCON_SLOW_CHARGER, 56 EXTCON_SLOW_CHARGER,
57 EXTCON_CHARGE_DOWNSTREAM, /* Charging an external device */ 57 EXTCON_CHARGE_DOWNSTREAM, /* Charging an external device */
58 EXTCON_HDMI, 58 EXTCON_HDMI,
59 EXTCON_MHL, 59 EXTCON_MHL,
60 EXTCON_DVI, 60 EXTCON_DVI,
@@ -76,8 +76,8 @@ struct extcon_cable;
76 76
77/** 77/**
78 * struct extcon_dev - An extcon device represents one external connector. 78 * struct extcon_dev - An extcon device represents one external connector.
79 * @name: The name of this extcon device. Parent device name is used 79 * @name: The name of this extcon device. Parent device name is
80 * if NULL. 80 * used if NULL.
81 * @supported_cable: Array of supported cable names ending with NULL. 81 * @supported_cable: Array of supported cable names ending with NULL.
82 * If supported_cable is NULL, cable name related APIs 82 * If supported_cable is NULL, cable name related APIs
83 * are disabled. 83 * are disabled.
@@ -89,21 +89,21 @@ struct extcon_cable;
89 * be attached simulataneously. {0x7, 0} is equivalent to 89 * be attached simulataneously. {0x7, 0} is equivalent to
90 * {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there 90 * {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
91 * can be no simultaneous connections. 91 * can be no simultaneous connections.
92 * @print_name: An optional callback to override the method to print the 92 * @print_name: An optional callback to override the method to print the
93 * name of the extcon device. 93 * name of the extcon device.
94 * @print_state: An optional callback to override the method to print the 94 * @print_state: An optional callback to override the method to print the
95 * status of the extcon device. 95 * status of the extcon device.
96 * @dev: Device of this extcon. Do not provide at register-time. 96 * @dev: Device of this extcon. Do not provide at register-time.
97 * @state: Attach/detach state of this extcon. Do not provide at 97 * @state: Attach/detach state of this extcon. Do not provide at
98 * register-time 98 * register-time.
99 * @nh: Notifier for the state change events from this extcon 99 * @nh: Notifier for the state change events from this extcon
100 * @entry: To support list of extcon devices so that users can search 100 * @entry: To support list of extcon devices so that users can search
101 * for extcon devices based on the extcon name. 101 * for extcon devices based on the extcon name.
102 * @lock: 102 * @lock:
103 * @max_supported: Internal value to store the number of cables. 103 * @max_supported: Internal value to store the number of cables.
104 * @extcon_dev_type: Device_type struct to provide attribute_groups 104 * @extcon_dev_type: Device_type struct to provide attribute_groups
105 * customized for each extcon device. 105 * customized for each extcon device.
106 * @cables: Sysfs subdirectories. Each represents one cable. 106 * @cables: Sysfs subdirectories. Each represents one cable.
107 * 107 *
108 * In most cases, users only need to provide "User initializing data" of 108 * In most cases, users only need to provide "User initializing data" of
109 * this struct when registering an extcon. In some exceptional cases, 109 * this struct when registering an extcon. In some exceptional cases,
@@ -111,26 +111,27 @@ struct extcon_cable;
111 * are overwritten by register function. 111 * are overwritten by register function.
112 */ 112 */
113struct extcon_dev { 113struct extcon_dev {
114 /* --- Optional user initializing data --- */ 114 /* Optional user initializing data */
115 const char *name; 115 const char *name;
116 const char **supported_cable; 116 const char **supported_cable;
117 const u32 *mutually_exclusive; 117 const u32 *mutually_exclusive;
118 118
119 /* --- Optional callbacks to override class functions --- */ 119 /* Optional callbacks to override class functions */
120 ssize_t (*print_name)(struct extcon_dev *edev, char *buf); 120 ssize_t (*print_name)(struct extcon_dev *edev, char *buf);
121 ssize_t (*print_state)(struct extcon_dev *edev, char *buf); 121 ssize_t (*print_state)(struct extcon_dev *edev, char *buf);
122 122
123 /* --- Internal data. Please do not set. --- */ 123 /* Internal data. Please do not set. */
124 struct device *dev; 124 struct device *dev;
125 u32 state;
126 struct raw_notifier_head nh; 125 struct raw_notifier_head nh;
127 struct list_head entry; 126 struct list_head entry;
128 spinlock_t lock; /* could be called by irq handler */
129 int max_supported; 127 int max_supported;
128 spinlock_t lock; /* could be called by irq handler */
129 u32 state;
130 130
131 /* /sys/class/extcon/.../cable.n/... */ 131 /* /sys/class/extcon/.../cable.n/... */
132 struct device_type extcon_dev_type; 132 struct device_type extcon_dev_type;
133 struct extcon_cable *cables; 133 struct extcon_cable *cables;
134
134 /* /sys/class/extcon/.../mutually_exclusive/... */ 135 /* /sys/class/extcon/.../mutually_exclusive/... */
135 struct attribute_group attr_g_muex; 136 struct attribute_group attr_g_muex;
136 struct attribute **attrs_muex; 137 struct attribute **attrs_muex;
@@ -138,13 +139,13 @@ struct extcon_dev {
138}; 139};
139 140
140/** 141/**
141 * struct extcon_cable - An internal data for each cable of extcon device. 142 * struct extcon_cable - An internal data for each cable of extcon device.
142 * @edev: The extcon device 143 * @edev: The extcon device
143 * @cable_index: Index of this cable in the edev 144 * @cable_index: Index of this cable in the edev
144 * @attr_g: Attribute group for the cable 145 * @attr_g: Attribute group for the cable
145 * @attr_name: "name" sysfs entry 146 * @attr_name: "name" sysfs entry
146 * @attr_state: "state" sysfs entry 147 * @attr_state: "state" sysfs entry
147 * @attrs: Array pointing to attr_name and attr_state for attr_g 148 * @attrs: Array pointing to attr_name and attr_state for attr_g
148 */ 149 */
149struct extcon_cable { 150struct extcon_cable {
150 struct extcon_dev *edev; 151 struct extcon_dev *edev;
@@ -159,11 +160,13 @@ struct extcon_cable {
159 160
160/** 161/**
161 * struct extcon_specific_cable_nb - An internal data for 162 * struct extcon_specific_cable_nb - An internal data for
162 * extcon_register_interest(). 163 * extcon_register_interest().
163 * @internal_nb: a notifier block bridging extcon notifier and cable notifier. 164 * @internal_nb: A notifier block bridging extcon notifier
164 * @user_nb: user provided notifier block for events from a specific cable. 165 * and cable notifier.
166 * @user_nb: user provided notifier block for events from
167 * a specific cable.
165 * @cable_index: the target cable. 168 * @cable_index: the target cable.
166 * @edev: the target extcon device. 169 * @edev: the target extcon device.
167 * @previous_value: the saved previous event value. 170 * @previous_value: the saved previous event value.
168 */ 171 */
169struct extcon_specific_cable_nb { 172struct extcon_specific_cable_nb {