MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 1 | /* |
Chanwoo Choi | b9ec23c | 2015-04-24 14:48:52 +0900 | [diff] [blame] | 2 | * drivers/extcon/extcon.c - External Connector (extcon) framework. |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 3 | * |
| 4 | * External connector (extcon) class driver |
| 5 | * |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 6 | * Copyright (C) 2015 Samsung Electronics |
| 7 | * Author: Chanwoo Choi <cw00.choi@samsung.com> |
| 8 | * |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 9 | * Copyright (C) 2012 Samsung Electronics |
| 10 | * Author: Donggeun Kim <dg77.kim@samsung.com> |
| 11 | * Author: MyungJoo Ham <myungjoo.ham@samsung.com> |
| 12 | * |
| 13 | * based on android/drivers/switch/switch_class.c |
| 14 | * Copyright (C) 2008 Google, Inc. |
| 15 | * Author: Mike Lockwood <lockwood@android.com> |
| 16 | * |
| 17 | * This software is licensed under the terms of the GNU General Public |
| 18 | * License version 2, as published by the Free Software Foundation, and |
| 19 | * may be copied, distributed, and modified under those terms. |
| 20 | * |
| 21 | * This program is distributed in the hope that it will be useful, |
| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 24 | * GNU General Public License for more details. |
Chanwoo Choi | b9ec23c | 2015-04-24 14:48:52 +0900 | [diff] [blame] | 25 | */ |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 26 | |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/device.h> |
| 31 | #include <linux/fs.h> |
| 32 | #include <linux/err.h> |
| 33 | #include <linux/extcon.h> |
Tomasz Figa | f841afb | 2014-10-16 15:11:44 +0200 | [diff] [blame] | 34 | #include <linux/of.h> |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 35 | #include <linux/slab.h> |
Mark Brown | 9baf322 | 2012-08-16 20:03:21 +0100 | [diff] [blame] | 36 | #include <linux/sysfs.h> |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 37 | |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 38 | #define SUPPORTED_CABLE_MAX 32 |
| 39 | #define CABLE_NAME_MAX 30 |
| 40 | |
Chanwoo Choi | 55e4e2f | 2016-07-11 16:34:52 +0900 | [diff] [blame^] | 41 | struct __extcon_info { |
| 42 | unsigned int type; |
| 43 | unsigned int id; |
| 44 | const char *name; |
| 45 | |
| 46 | } extcon_info[] = { |
| 47 | [EXTCON_NONE] = { |
| 48 | .type = EXTCON_TYPE_MISC, |
| 49 | .id = EXTCON_NONE, |
| 50 | .name = "NONE", |
| 51 | }, |
Chanwoo Choi | 73b6ecd | 2015-06-12 11:10:06 +0900 | [diff] [blame] | 52 | |
Chanwoo Choi | 8e9bc36 | 2015-05-19 19:58:49 +0900 | [diff] [blame] | 53 | /* USB external connector */ |
Chanwoo Choi | 55e4e2f | 2016-07-11 16:34:52 +0900 | [diff] [blame^] | 54 | [EXTCON_USB] = { |
| 55 | .type = EXTCON_TYPE_USB, |
| 56 | .id = EXTCON_USB, |
| 57 | .name = "USB", |
| 58 | }, |
| 59 | [EXTCON_USB_HOST] = { |
| 60 | .type = EXTCON_TYPE_USB, |
| 61 | .id = EXTCON_USB_HOST, |
| 62 | .name = "USB_HOST", |
| 63 | }, |
Chanwoo Choi | 8e9bc36 | 2015-05-19 19:58:49 +0900 | [diff] [blame] | 64 | |
Chanwoo Choi | 11eecf9 | 2015-10-03 14:15:13 +0900 | [diff] [blame] | 65 | /* Charging external connector */ |
Chanwoo Choi | 55e4e2f | 2016-07-11 16:34:52 +0900 | [diff] [blame^] | 66 | [EXTCON_CHG_USB_SDP] = { |
| 67 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, |
| 68 | .id = EXTCON_CHG_USB_SDP, |
| 69 | .name = "SDP", |
| 70 | }, |
| 71 | [EXTCON_CHG_USB_DCP] = { |
| 72 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, |
| 73 | .id = EXTCON_CHG_USB_DCP, |
| 74 | .name = "DCP", |
| 75 | }, |
| 76 | [EXTCON_CHG_USB_CDP] = { |
| 77 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, |
| 78 | .id = EXTCON_CHG_USB_CDP, |
| 79 | .name = "CDP", |
| 80 | }, |
| 81 | [EXTCON_CHG_USB_ACA] = { |
| 82 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, |
| 83 | .id = EXTCON_CHG_USB_ACA, |
| 84 | .name = "ACA", |
| 85 | }, |
| 86 | [EXTCON_CHG_USB_FAST] = { |
| 87 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, |
| 88 | .id = EXTCON_CHG_USB_FAST, |
| 89 | .name = "FAST-CHARGER", |
| 90 | }, |
| 91 | [EXTCON_CHG_USB_SLOW] = { |
| 92 | .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, |
| 93 | .id = EXTCON_CHG_USB_SLOW, |
| 94 | .name = "SLOW-CHARGER", |
| 95 | }, |
Chanwoo Choi | 8e9bc36 | 2015-05-19 19:58:49 +0900 | [diff] [blame] | 96 | |
Chanwoo Choi | 11eecf9 | 2015-10-03 14:15:13 +0900 | [diff] [blame] | 97 | /* Jack external connector */ |
Chanwoo Choi | 55e4e2f | 2016-07-11 16:34:52 +0900 | [diff] [blame^] | 98 | [EXTCON_JACK_MICROPHONE] = { |
| 99 | .type = EXTCON_TYPE_JACK, |
| 100 | .id = EXTCON_JACK_MICROPHONE, |
| 101 | .name = "MICROPHONE", |
| 102 | }, |
| 103 | [EXTCON_JACK_HEADPHONE] = { |
| 104 | .type = EXTCON_TYPE_JACK, |
| 105 | .id = EXTCON_JACK_HEADPHONE, |
| 106 | .name = "HEADPHONE", |
| 107 | }, |
| 108 | [EXTCON_JACK_LINE_IN] = { |
| 109 | .type = EXTCON_TYPE_JACK, |
| 110 | .id = EXTCON_JACK_LINE_IN, |
| 111 | .name = "LINE-IN", |
| 112 | }, |
| 113 | [EXTCON_JACK_LINE_OUT] = { |
| 114 | .type = EXTCON_TYPE_JACK, |
| 115 | .id = EXTCON_JACK_LINE_OUT, |
| 116 | .name = "LINE-OUT", |
| 117 | }, |
| 118 | [EXTCON_JACK_VIDEO_IN] = { |
| 119 | .type = EXTCON_TYPE_JACK, |
| 120 | .id = EXTCON_JACK_VIDEO_IN, |
| 121 | .name = "VIDEO-IN", |
| 122 | }, |
| 123 | [EXTCON_JACK_VIDEO_OUT] = { |
| 124 | .type = EXTCON_TYPE_JACK, |
| 125 | .id = EXTCON_JACK_VIDEO_OUT, |
| 126 | .name = "VIDEO-OUT", |
| 127 | }, |
| 128 | [EXTCON_JACK_SPDIF_IN] = { |
| 129 | .type = EXTCON_TYPE_JACK, |
| 130 | .id = EXTCON_JACK_SPDIF_IN, |
| 131 | .name = "SPDIF-IN", |
| 132 | }, |
| 133 | [EXTCON_JACK_SPDIF_OUT] = { |
| 134 | .type = EXTCON_TYPE_JACK, |
| 135 | .id = EXTCON_JACK_SPDIF_OUT, |
| 136 | .name = "SPDIF-OUT", |
| 137 | }, |
Chanwoo Choi | 8e9bc36 | 2015-05-19 19:58:49 +0900 | [diff] [blame] | 138 | |
Chanwoo Choi | 11eecf9 | 2015-10-03 14:15:13 +0900 | [diff] [blame] | 139 | /* Display external connector */ |
Chanwoo Choi | 55e4e2f | 2016-07-11 16:34:52 +0900 | [diff] [blame^] | 140 | [EXTCON_DISP_HDMI] = { |
| 141 | .type = EXTCON_TYPE_DISP, |
| 142 | .id = EXTCON_DISP_HDMI, |
| 143 | .name = "HDMI", |
| 144 | }, |
| 145 | [EXTCON_DISP_MHL] = { |
| 146 | .type = EXTCON_TYPE_DISP, |
| 147 | .id = EXTCON_DISP_MHL, |
| 148 | .name = "MHL", |
| 149 | }, |
| 150 | [EXTCON_DISP_DVI] = { |
| 151 | .type = EXTCON_TYPE_DISP, |
| 152 | .id = EXTCON_DISP_DVI, |
| 153 | .name = "DVI", |
| 154 | }, |
| 155 | [EXTCON_DISP_VGA] = { |
| 156 | .type = EXTCON_TYPE_DISP, |
| 157 | .id = EXTCON_DISP_VGA, |
| 158 | .name = "VGA", |
| 159 | }, |
Chanwoo Choi | 8e9bc36 | 2015-05-19 19:58:49 +0900 | [diff] [blame] | 160 | |
Chanwoo Choi | 11eecf9 | 2015-10-03 14:15:13 +0900 | [diff] [blame] | 161 | /* Miscellaneous external connector */ |
Chanwoo Choi | 55e4e2f | 2016-07-11 16:34:52 +0900 | [diff] [blame^] | 162 | [EXTCON_DOCK] = { |
| 163 | .type = EXTCON_TYPE_MISC, |
| 164 | .id = EXTCON_DOCK, |
| 165 | .name = "DOCK", |
| 166 | }, |
| 167 | [EXTCON_JIG] = { |
| 168 | .type = EXTCON_TYPE_MISC, |
| 169 | .id = EXTCON_JIG, |
| 170 | .name = "JIG", |
| 171 | }, |
| 172 | [EXTCON_MECHANICAL] = { |
| 173 | .type = EXTCON_TYPE_MISC, |
| 174 | .id = EXTCON_MECHANICAL, |
| 175 | .name = "MECHANICAL", |
| 176 | }, |
Chanwoo Choi | 8e9bc36 | 2015-05-19 19:58:49 +0900 | [diff] [blame] | 177 | |
Chanwoo Choi | 55e4e2f | 2016-07-11 16:34:52 +0900 | [diff] [blame^] | 178 | { /* sentinel */ } |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 179 | }; |
| 180 | |
Chanwoo Choi | 20f7b53 | 2016-06-27 19:17:06 +0900 | [diff] [blame] | 181 | /** |
| 182 | * struct extcon_cable - An internal data for each cable of extcon device. |
| 183 | * @edev: The extcon device |
| 184 | * @cable_index: Index of this cable in the edev |
| 185 | * @attr_g: Attribute group for the cable |
| 186 | * @attr_name: "name" sysfs entry |
| 187 | * @attr_state: "state" sysfs entry |
| 188 | * @attrs: Array pointing to attr_name and attr_state for attr_g |
| 189 | */ |
| 190 | struct extcon_cable { |
| 191 | struct extcon_dev *edev; |
| 192 | int cable_index; |
| 193 | |
| 194 | struct attribute_group attr_g; |
| 195 | struct device_attribute attr_name; |
| 196 | struct device_attribute attr_state; |
| 197 | |
| 198 | struct attribute *attrs[3]; /* to be fed to attr_g.attrs */ |
| 199 | }; |
| 200 | |
Mark Brown | be3a07f | 2012-06-05 16:14:38 +0100 | [diff] [blame] | 201 | static struct class *extcon_class; |
MyungJoo Ham | 449a2bf | 2012-04-23 20:19:57 +0900 | [diff] [blame] | 202 | #if defined(CONFIG_ANDROID) |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 203 | static struct class_compat *switch_class; |
MyungJoo Ham | 449a2bf | 2012-04-23 20:19:57 +0900 | [diff] [blame] | 204 | #endif /* CONFIG_ANDROID */ |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 205 | |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 206 | static LIST_HEAD(extcon_dev_list); |
| 207 | static DEFINE_MUTEX(extcon_dev_list_lock); |
| 208 | |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 209 | /** |
| 210 | * check_mutually_exclusive - Check if new_state violates mutually_exclusive |
Chanwoo Choi | a75e1c7 | 2013-08-31 13:16:49 +0900 | [diff] [blame] | 211 | * condition. |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 212 | * @edev: the extcon device |
| 213 | * @new_state: new cable attach status for @edev |
| 214 | * |
| 215 | * Returns 0 if nothing violates. Returns the index + 1 for the first |
| 216 | * violated condition. |
| 217 | */ |
| 218 | static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state) |
| 219 | { |
| 220 | int i = 0; |
| 221 | |
| 222 | if (!edev->mutually_exclusive) |
| 223 | return 0; |
| 224 | |
| 225 | for (i = 0; edev->mutually_exclusive[i]; i++) { |
anish kumar | 28c0ada | 2012-08-30 00:35:10 +0530 | [diff] [blame] | 226 | int weight; |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 227 | u32 correspondants = new_state & edev->mutually_exclusive[i]; |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 228 | |
anish kumar | 28c0ada | 2012-08-30 00:35:10 +0530 | [diff] [blame] | 229 | /* calculate the total number of bits set */ |
| 230 | weight = hweight32(correspondants); |
| 231 | if (weight > 1) |
| 232 | return i + 1; |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | return 0; |
| 236 | } |
| 237 | |
Chanwoo Choi | 73b6ecd | 2015-06-12 11:10:06 +0900 | [diff] [blame] | 238 | static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id) |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 239 | { |
| 240 | int i; |
| 241 | |
| 242 | /* Find the the index of extcon cable in edev->supported_cable */ |
| 243 | for (i = 0; i < edev->max_supported; i++) { |
| 244 | if (edev->supported_cable[i] == id) |
| 245 | return i; |
| 246 | } |
| 247 | |
| 248 | return -EINVAL; |
| 249 | } |
| 250 | |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 251 | static bool is_extcon_changed(u32 prev, u32 new, int idx, bool *attached) |
| 252 | { |
| 253 | if (((prev >> idx) & 0x1) != ((new >> idx) & 0x1)) { |
Hans de Goede | f4513b0 | 2015-08-24 00:35:36 +0200 | [diff] [blame] | 254 | *attached = ((new >> idx) & 0x1) ? true : false; |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 255 | return true; |
| 256 | } |
| 257 | |
| 258 | return false; |
| 259 | } |
| 260 | |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 261 | static ssize_t state_show(struct device *dev, struct device_attribute *attr, |
| 262 | char *buf) |
| 263 | { |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 264 | int i, count = 0; |
Jingoo Han | cb8bb3a | 2013-09-09 14:33:32 +0900 | [diff] [blame] | 265 | struct extcon_dev *edev = dev_get_drvdata(dev); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 266 | |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 267 | if (edev->max_supported == 0) |
| 268 | return sprintf(buf, "%u\n", edev->state); |
| 269 | |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 270 | for (i = 0; i < edev->max_supported; i++) { |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 271 | count += sprintf(buf + count, "%s=%d\n", |
Chanwoo Choi | 55e4e2f | 2016-07-11 16:34:52 +0900 | [diff] [blame^] | 272 | extcon_info[edev->supported_cable[i]].name, |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 273 | !!(edev->state & (1 << i))); |
| 274 | } |
| 275 | |
| 276 | return count; |
| 277 | } |
Chanwoo Choi | 5d5321e | 2016-07-18 15:39:28 +0900 | [diff] [blame] | 278 | static DEVICE_ATTR_RO(state); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 279 | |
| 280 | static ssize_t name_show(struct device *dev, struct device_attribute *attr, |
| 281 | char *buf) |
| 282 | { |
Jingoo Han | cb8bb3a | 2013-09-09 14:33:32 +0900 | [diff] [blame] | 283 | struct extcon_dev *edev = dev_get_drvdata(dev); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 284 | |
Chanwoo Choi | 71c3ffa | 2015-04-15 15:02:01 +0900 | [diff] [blame] | 285 | return sprintf(buf, "%s\n", edev->name); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 286 | } |
Greg Kroah-Hartman | af01da0 | 2013-07-24 15:05:10 -0700 | [diff] [blame] | 287 | static DEVICE_ATTR_RO(name); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 288 | |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 289 | static ssize_t cable_name_show(struct device *dev, |
| 290 | struct device_attribute *attr, char *buf) |
| 291 | { |
| 292 | struct extcon_cable *cable = container_of(attr, struct extcon_cable, |
| 293 | attr_name); |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 294 | int i = cable->cable_index; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 295 | |
| 296 | return sprintf(buf, "%s\n", |
Chanwoo Choi | 55e4e2f | 2016-07-11 16:34:52 +0900 | [diff] [blame^] | 297 | extcon_info[cable->edev->supported_cable[i]].name); |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | static ssize_t cable_state_show(struct device *dev, |
| 301 | struct device_attribute *attr, char *buf) |
| 302 | { |
| 303 | struct extcon_cable *cable = container_of(attr, struct extcon_cable, |
| 304 | attr_state); |
| 305 | |
Roger Quadros | be052cc | 2015-07-07 16:06:15 +0300 | [diff] [blame] | 306 | int i = cable->cable_index; |
| 307 | |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 308 | return sprintf(buf, "%d\n", |
| 309 | extcon_get_cable_state_(cable->edev, |
Roger Quadros | be052cc | 2015-07-07 16:06:15 +0300 | [diff] [blame] | 310 | cable->edev->supported_cable[i])); |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 311 | } |
| 312 | |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 313 | /** |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 314 | * extcon_update_state() - Update the cable attach states of the extcon device |
Chanwoo Choi | a75e1c7 | 2013-08-31 13:16:49 +0900 | [diff] [blame] | 315 | * only for the masked bits. |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 316 | * @edev: the extcon device |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 317 | * @mask: the bit mask to designate updated bits. |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 318 | * @state: new cable attach status for @edev |
| 319 | * |
| 320 | * Changing the state sends uevent with environment variable containing |
| 321 | * the name of extcon device (envp[0]) and the state output (envp[1]). |
| 322 | * Tizen uses this format for extcon device to get events from ports. |
| 323 | * Android uses this format as well. |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 324 | * |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 325 | * Note that the notifier provides which bits are changed in the state |
| 326 | * variable with the val parameter (second) to the callback. |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 327 | */ |
Chanwoo Choi | 912465b | 2016-07-01 02:41:18 +0900 | [diff] [blame] | 328 | static int extcon_update_state(struct extcon_dev *edev, u32 mask, u32 state) |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 329 | { |
| 330 | char name_buf[120]; |
| 331 | char state_buf[120]; |
| 332 | char *prop_buf; |
| 333 | char *envp[3]; |
| 334 | int env_offset = 0; |
| 335 | int length; |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 336 | int index; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 337 | unsigned long flags; |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 338 | bool attached; |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 339 | |
Chanwoo Choi | 7eae43a | 2015-06-21 23:48:36 +0900 | [diff] [blame] | 340 | if (!edev) |
| 341 | return -EINVAL; |
| 342 | |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 343 | spin_lock_irqsave(&edev->lock, flags); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 344 | |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 345 | if (edev->state != ((edev->state & ~mask) | (state & mask))) { |
Roger Quadros | f7a8981 | 2015-07-06 17:46:58 +0300 | [diff] [blame] | 346 | u32 old_state; |
| 347 | |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 348 | if (check_mutually_exclusive(edev, (edev->state & ~mask) | |
| 349 | (state & mask))) { |
| 350 | spin_unlock_irqrestore(&edev->lock, flags); |
| 351 | return -EPERM; |
| 352 | } |
| 353 | |
Roger Quadros | f7a8981 | 2015-07-06 17:46:58 +0300 | [diff] [blame] | 354 | old_state = edev->state; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 355 | edev->state &= ~mask; |
| 356 | edev->state |= state & mask; |
| 357 | |
Roger Quadros | f7a8981 | 2015-07-06 17:46:58 +0300 | [diff] [blame] | 358 | for (index = 0; index < edev->max_supported; index++) { |
| 359 | if (is_extcon_changed(old_state, edev->state, index, |
| 360 | &attached)) |
| 361 | raw_notifier_call_chain(&edev->nh[index], |
| 362 | attached, edev); |
| 363 | } |
| 364 | |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 365 | /* This could be in interrupt handler */ |
| 366 | prop_buf = (char *)get_zeroed_page(GFP_ATOMIC); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 367 | if (prop_buf) { |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 368 | length = name_show(&edev->dev, NULL, prop_buf); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 369 | if (length > 0) { |
| 370 | if (prop_buf[length - 1] == '\n') |
| 371 | prop_buf[length - 1] = 0; |
| 372 | snprintf(name_buf, sizeof(name_buf), |
| 373 | "NAME=%s", prop_buf); |
| 374 | envp[env_offset++] = name_buf; |
| 375 | } |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 376 | length = state_show(&edev->dev, NULL, prop_buf); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 377 | if (length > 0) { |
| 378 | if (prop_buf[length - 1] == '\n') |
| 379 | prop_buf[length - 1] = 0; |
| 380 | snprintf(state_buf, sizeof(state_buf), |
| 381 | "STATE=%s", prop_buf); |
| 382 | envp[env_offset++] = state_buf; |
| 383 | } |
| 384 | envp[env_offset] = NULL; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 385 | /* Unlock early before uevent */ |
| 386 | spin_unlock_irqrestore(&edev->lock, flags); |
| 387 | |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 388 | kobject_uevent_env(&edev->dev.kobj, KOBJ_CHANGE, envp); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 389 | free_page((unsigned long)prop_buf); |
| 390 | } else { |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 391 | /* Unlock early before uevent */ |
| 392 | spin_unlock_irqrestore(&edev->lock, flags); |
| 393 | |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 394 | dev_err(&edev->dev, "out of memory in extcon_set_state\n"); |
| 395 | kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 396 | } |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 397 | } else { |
| 398 | /* No changes */ |
| 399 | spin_unlock_irqrestore(&edev->lock, flags); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 400 | } |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 401 | |
| 402 | return 0; |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 403 | } |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 404 | |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 405 | /** |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 406 | * extcon_get_cable_state_() - Get the status of a specific cable. |
| 407 | * @edev: the extcon device that has the cable. |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 408 | * @id: the unique id of each external connector in extcon enumeration. |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 409 | */ |
Chanwoo Choi | 73b6ecd | 2015-06-12 11:10:06 +0900 | [diff] [blame] | 410 | int extcon_get_cable_state_(struct extcon_dev *edev, const unsigned int id) |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 411 | { |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 412 | int index; |
| 413 | |
Chanwoo Choi | 7eae43a | 2015-06-21 23:48:36 +0900 | [diff] [blame] | 414 | if (!edev) |
| 415 | return -EINVAL; |
| 416 | |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 417 | index = find_cable_index_by_id(edev, id); |
| 418 | if (index < 0) |
| 419 | return index; |
| 420 | |
| 421 | if (edev->max_supported && edev->max_supported <= index) |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 422 | return -EINVAL; |
| 423 | |
| 424 | return !!(edev->state & (1 << index)); |
| 425 | } |
| 426 | EXPORT_SYMBOL_GPL(extcon_get_cable_state_); |
| 427 | |
| 428 | /** |
Axel Lin | 909f9ec | 2012-10-04 09:53:45 +0900 | [diff] [blame] | 429 | * extcon_set_cable_state_() - Set the status of a specific cable. |
Chanwoo Choi | a75e1c7 | 2013-08-31 13:16:49 +0900 | [diff] [blame] | 430 | * @edev: the extcon device that has the cable. |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 431 | * @id: the unique id of each external connector |
| 432 | * in extcon enumeration. |
| 433 | * @state: the new cable status. The default semantics is |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 434 | * true: attached / false: detached. |
| 435 | */ |
Chanwoo Choi | 73b6ecd | 2015-06-12 11:10:06 +0900 | [diff] [blame] | 436 | int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id, |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 437 | bool cable_state) |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 438 | { |
| 439 | u32 state; |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 440 | int index; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 441 | |
Chanwoo Choi | 7eae43a | 2015-06-21 23:48:36 +0900 | [diff] [blame] | 442 | if (!edev) |
| 443 | return -EINVAL; |
| 444 | |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 445 | index = find_cable_index_by_id(edev, id); |
| 446 | if (index < 0) |
| 447 | return index; |
| 448 | |
| 449 | if (edev->max_supported && edev->max_supported <= index) |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 450 | return -EINVAL; |
| 451 | |
| 452 | state = cable_state ? (1 << index) : 0; |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 453 | return extcon_update_state(edev, 1 << index, state); |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 454 | } |
| 455 | EXPORT_SYMBOL_GPL(extcon_set_cable_state_); |
| 456 | |
| 457 | /** |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 458 | * extcon_get_extcon_dev() - Get the extcon device instance from the name |
| 459 | * @extcon_name: The extcon name provided with extcon_dev_register() |
| 460 | */ |
| 461 | struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) |
| 462 | { |
| 463 | struct extcon_dev *sd; |
| 464 | |
Chanwoo Choi | 7eae43a | 2015-06-21 23:48:36 +0900 | [diff] [blame] | 465 | if (!extcon_name) |
| 466 | return ERR_PTR(-EINVAL); |
| 467 | |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 468 | mutex_lock(&extcon_dev_list_lock); |
| 469 | list_for_each_entry(sd, &extcon_dev_list, entry) { |
| 470 | if (!strcmp(sd->name, extcon_name)) |
| 471 | goto out; |
| 472 | } |
| 473 | sd = NULL; |
| 474 | out: |
| 475 | mutex_unlock(&extcon_dev_list_lock); |
| 476 | return sd; |
| 477 | } |
| 478 | EXPORT_SYMBOL_GPL(extcon_get_extcon_dev); |
| 479 | |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 480 | /** |
Peter Meerwald | c338bb0 | 2012-08-23 09:11:54 +0900 | [diff] [blame] | 481 | * extcon_register_notifier() - Register a notifiee to get notified by |
Chanwoo Choi | a75e1c7 | 2013-08-31 13:16:49 +0900 | [diff] [blame] | 482 | * any attach status changes from the extcon. |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 483 | * @edev: the extcon device that has the external connecotr. |
| 484 | * @id: the unique id of each external connector in extcon enumeration. |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 485 | * @nb: a notifier block to be registered. |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 486 | * |
| 487 | * Note that the second parameter given to the callback of nb (val) is |
| 488 | * "old_state", not the current state. The current state can be retrieved |
| 489 | * by looking at the third pameter (edev pointer)'s state value. |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 490 | */ |
Chanwoo Choi | 73b6ecd | 2015-06-12 11:10:06 +0900 | [diff] [blame] | 491 | int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 492 | struct notifier_block *nb) |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 493 | { |
Hans de Goede | 66bee35 | 2015-03-21 17:26:24 +0100 | [diff] [blame] | 494 | unsigned long flags; |
Maninder Singh | 2c8116a | 2016-08-01 14:51:30 +0530 | [diff] [blame] | 495 | int ret, idx = -EINVAL; |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 496 | |
Chanwoo Choi | 830ae44 | 2016-05-31 17:32:30 +0900 | [diff] [blame] | 497 | if (!nb) |
Chanwoo Choi | 7eae43a | 2015-06-21 23:48:36 +0900 | [diff] [blame] | 498 | return -EINVAL; |
| 499 | |
Chanwoo Choi | 830ae44 | 2016-05-31 17:32:30 +0900 | [diff] [blame] | 500 | if (edev) { |
| 501 | idx = find_cable_index_by_id(edev, id); |
Stephen Boyd | a05f44c | 2016-06-23 19:34:30 +0900 | [diff] [blame] | 502 | if (idx < 0) |
| 503 | return idx; |
Hans de Goede | 66bee35 | 2015-03-21 17:26:24 +0100 | [diff] [blame] | 504 | |
Chanwoo Choi | 830ae44 | 2016-05-31 17:32:30 +0900 | [diff] [blame] | 505 | spin_lock_irqsave(&edev->lock, flags); |
| 506 | ret = raw_notifier_chain_register(&edev->nh[idx], nb); |
| 507 | spin_unlock_irqrestore(&edev->lock, flags); |
| 508 | } else { |
| 509 | struct extcon_dev *extd; |
| 510 | |
| 511 | mutex_lock(&extcon_dev_list_lock); |
| 512 | list_for_each_entry(extd, &extcon_dev_list, entry) { |
| 513 | idx = find_cable_index_by_id(extd, id); |
| 514 | if (idx >= 0) |
| 515 | break; |
| 516 | } |
| 517 | mutex_unlock(&extcon_dev_list_lock); |
| 518 | |
| 519 | if (idx >= 0) { |
| 520 | edev = extd; |
| 521 | return extcon_register_notifier(extd, id, nb); |
| 522 | } else { |
| 523 | ret = -ENODEV; |
| 524 | } |
| 525 | } |
Hans de Goede | 66bee35 | 2015-03-21 17:26:24 +0100 | [diff] [blame] | 526 | |
| 527 | return ret; |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 528 | } |
| 529 | EXPORT_SYMBOL_GPL(extcon_register_notifier); |
| 530 | |
| 531 | /** |
Peter Meerwald | c338bb0 | 2012-08-23 09:11:54 +0900 | [diff] [blame] | 532 | * extcon_unregister_notifier() - Unregister a notifiee from the extcon device. |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 533 | * @edev: the extcon device that has the external connecotr. |
| 534 | * @id: the unique id of each external connector in extcon enumeration. |
| 535 | * @nb: a notifier block to be registered. |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 536 | */ |
Chanwoo Choi | 73b6ecd | 2015-06-12 11:10:06 +0900 | [diff] [blame] | 537 | int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 538 | struct notifier_block *nb) |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 539 | { |
Hans de Goede | 66bee35 | 2015-03-21 17:26:24 +0100 | [diff] [blame] | 540 | unsigned long flags; |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 541 | int ret, idx; |
| 542 | |
Chanwoo Choi | 7eae43a | 2015-06-21 23:48:36 +0900 | [diff] [blame] | 543 | if (!edev || !nb) |
| 544 | return -EINVAL; |
| 545 | |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 546 | idx = find_cable_index_by_id(edev, id); |
Stephen Boyd | a05f44c | 2016-06-23 19:34:30 +0900 | [diff] [blame] | 547 | if (idx < 0) |
| 548 | return idx; |
Hans de Goede | 66bee35 | 2015-03-21 17:26:24 +0100 | [diff] [blame] | 549 | |
| 550 | spin_lock_irqsave(&edev->lock, flags); |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 551 | ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); |
Hans de Goede | 66bee35 | 2015-03-21 17:26:24 +0100 | [diff] [blame] | 552 | spin_unlock_irqrestore(&edev->lock, flags); |
| 553 | |
| 554 | return ret; |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 555 | } |
| 556 | EXPORT_SYMBOL_GPL(extcon_unregister_notifier); |
| 557 | |
Greg Kroah-Hartman | af01da0 | 2013-07-24 15:05:10 -0700 | [diff] [blame] | 558 | static struct attribute *extcon_attrs[] = { |
| 559 | &dev_attr_state.attr, |
| 560 | &dev_attr_name.attr, |
| 561 | NULL, |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 562 | }; |
Greg Kroah-Hartman | af01da0 | 2013-07-24 15:05:10 -0700 | [diff] [blame] | 563 | ATTRIBUTE_GROUPS(extcon); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 564 | |
| 565 | static int create_extcon_class(void) |
| 566 | { |
| 567 | if (!extcon_class) { |
| 568 | extcon_class = class_create(THIS_MODULE, "extcon"); |
| 569 | if (IS_ERR(extcon_class)) |
| 570 | return PTR_ERR(extcon_class); |
Greg Kroah-Hartman | af01da0 | 2013-07-24 15:05:10 -0700 | [diff] [blame] | 571 | extcon_class->dev_groups = extcon_groups; |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 572 | |
MyungJoo Ham | 449a2bf | 2012-04-23 20:19:57 +0900 | [diff] [blame] | 573 | #if defined(CONFIG_ANDROID) |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 574 | switch_class = class_compat_register("switch"); |
| 575 | if (WARN(!switch_class, "cannot allocate")) |
| 576 | return -ENOMEM; |
MyungJoo Ham | 449a2bf | 2012-04-23 20:19:57 +0900 | [diff] [blame] | 577 | #endif /* CONFIG_ANDROID */ |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 578 | } |
| 579 | |
| 580 | return 0; |
| 581 | } |
| 582 | |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 583 | static void extcon_dev_release(struct device *dev) |
| 584 | { |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 585 | } |
| 586 | |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 587 | static const char *muex_name = "mutually_exclusive"; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 588 | static void dummy_sysfs_dev_release(struct device *dev) |
| 589 | { |
| 590 | } |
| 591 | |
Chanwoo Choi | a9af652 | 2014-04-24 19:46:49 +0900 | [diff] [blame] | 592 | /* |
| 593 | * extcon_dev_allocate() - Allocate the memory of extcon device. |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 594 | * @supported_cable: Array of supported extcon ending with EXTCON_NONE. |
Chanwoo Choi | a9af652 | 2014-04-24 19:46:49 +0900 | [diff] [blame] | 595 | * If supported_cable is NULL, cable name related APIs |
| 596 | * are disabled. |
| 597 | * |
| 598 | * This function allocates the memory for extcon device without allocating |
| 599 | * memory in each extcon provider driver and initialize default setting for |
| 600 | * extcon device. |
| 601 | * |
| 602 | * Return the pointer of extcon device if success or ERR_PTR(err) if fail |
| 603 | */ |
Chanwoo Choi | 73b6ecd | 2015-06-12 11:10:06 +0900 | [diff] [blame] | 604 | struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable) |
Chanwoo Choi | a9af652 | 2014-04-24 19:46:49 +0900 | [diff] [blame] | 605 | { |
| 606 | struct extcon_dev *edev; |
| 607 | |
Chanwoo Choi | 7eae43a | 2015-06-21 23:48:36 +0900 | [diff] [blame] | 608 | if (!supported_cable) |
| 609 | return ERR_PTR(-EINVAL); |
| 610 | |
Chanwoo Choi | a9af652 | 2014-04-24 19:46:49 +0900 | [diff] [blame] | 611 | edev = kzalloc(sizeof(*edev), GFP_KERNEL); |
| 612 | if (!edev) |
| 613 | return ERR_PTR(-ENOMEM); |
| 614 | |
| 615 | edev->max_supported = 0; |
| 616 | edev->supported_cable = supported_cable; |
| 617 | |
| 618 | return edev; |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * extcon_dev_free() - Free the memory of extcon device. |
| 623 | * @edev: the extcon device to free |
| 624 | */ |
| 625 | void extcon_dev_free(struct extcon_dev *edev) |
| 626 | { |
| 627 | kfree(edev); |
| 628 | } |
| 629 | EXPORT_SYMBOL_GPL(extcon_dev_free); |
| 630 | |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 631 | /** |
| 632 | * extcon_dev_register() - Register a new extcon device |
| 633 | * @edev : the new extcon device (should be allocated before calling) |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 634 | * |
| 635 | * Among the members of edev struct, please set the "user initializing data" |
| 636 | * in any case and set the "optional callbacks" if required. However, please |
| 637 | * do not set the values of "internal data", which are initialized by |
| 638 | * this function. |
| 639 | */ |
Chanwoo Choi | 42d7d75 | 2013-09-27 09:20:26 +0900 | [diff] [blame] | 640 | int extcon_dev_register(struct extcon_dev *edev) |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 641 | { |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 642 | int ret, index = 0; |
Chanwoo Choi | 71c3ffa | 2015-04-15 15:02:01 +0900 | [diff] [blame] | 643 | static atomic_t edev_no = ATOMIC_INIT(-1); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 644 | |
| 645 | if (!extcon_class) { |
| 646 | ret = create_extcon_class(); |
| 647 | if (ret < 0) |
| 648 | return ret; |
| 649 | } |
| 650 | |
Chanwoo Choi | 7eae43a | 2015-06-21 23:48:36 +0900 | [diff] [blame] | 651 | if (!edev || !edev->supported_cable) |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 652 | return -EINVAL; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 653 | |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 654 | for (; edev->supported_cable[index] != EXTCON_NONE; index++); |
| 655 | |
| 656 | edev->max_supported = index; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 657 | if (index > SUPPORTED_CABLE_MAX) { |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 658 | dev_err(&edev->dev, |
| 659 | "exceed the maximum number of supported cables\n"); |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 660 | return -EINVAL; |
| 661 | } |
| 662 | |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 663 | edev->dev.class = extcon_class; |
| 664 | edev->dev.release = extcon_dev_release; |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 665 | |
Chanwoo Choi | 71c3ffa | 2015-04-15 15:02:01 +0900 | [diff] [blame] | 666 | edev->name = dev_name(edev->dev.parent); |
Chanwoo Choi | 42d7d75 | 2013-09-27 09:20:26 +0900 | [diff] [blame] | 667 | if (IS_ERR_OR_NULL(edev->name)) { |
| 668 | dev_err(&edev->dev, |
| 669 | "extcon device name is null\n"); |
| 670 | return -EINVAL; |
| 671 | } |
Chanwoo Choi | 71c3ffa | 2015-04-15 15:02:01 +0900 | [diff] [blame] | 672 | dev_set_name(&edev->dev, "extcon%lu", |
| 673 | (unsigned long)atomic_inc_return(&edev_no)); |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 674 | |
| 675 | if (edev->max_supported) { |
| 676 | char buf[10]; |
| 677 | char *str; |
| 678 | struct extcon_cable *cable; |
| 679 | |
| 680 | edev->cables = kzalloc(sizeof(struct extcon_cable) * |
| 681 | edev->max_supported, GFP_KERNEL); |
| 682 | if (!edev->cables) { |
| 683 | ret = -ENOMEM; |
| 684 | goto err_sysfs_alloc; |
| 685 | } |
| 686 | for (index = 0; index < edev->max_supported; index++) { |
| 687 | cable = &edev->cables[index]; |
| 688 | |
| 689 | snprintf(buf, 10, "cable.%d", index); |
| 690 | str = kzalloc(sizeof(char) * (strlen(buf) + 1), |
| 691 | GFP_KERNEL); |
| 692 | if (!str) { |
| 693 | for (index--; index >= 0; index--) { |
| 694 | cable = &edev->cables[index]; |
| 695 | kfree(cable->attr_g.name); |
| 696 | } |
| 697 | ret = -ENOMEM; |
| 698 | |
| 699 | goto err_alloc_cables; |
| 700 | } |
| 701 | strcpy(str, buf); |
| 702 | |
| 703 | cable->edev = edev; |
| 704 | cable->cable_index = index; |
| 705 | cable->attrs[0] = &cable->attr_name.attr; |
| 706 | cable->attrs[1] = &cable->attr_state.attr; |
| 707 | cable->attrs[2] = NULL; |
| 708 | cable->attr_g.name = str; |
| 709 | cable->attr_g.attrs = cable->attrs; |
| 710 | |
Mark Brown | 9baf322 | 2012-08-16 20:03:21 +0100 | [diff] [blame] | 711 | sysfs_attr_init(&cable->attr_name.attr); |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 712 | cable->attr_name.attr.name = "name"; |
| 713 | cable->attr_name.attr.mode = 0444; |
| 714 | cable->attr_name.show = cable_name_show; |
| 715 | |
Mark Brown | 9baf322 | 2012-08-16 20:03:21 +0100 | [diff] [blame] | 716 | sysfs_attr_init(&cable->attr_state.attr); |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 717 | cable->attr_state.attr.name = "state"; |
Chanwoo Choi | ea9dd9d | 2013-05-22 19:31:59 +0900 | [diff] [blame] | 718 | cable->attr_state.attr.mode = 0444; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 719 | cable->attr_state.show = cable_state_show; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 720 | } |
| 721 | } |
| 722 | |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 723 | if (edev->max_supported && edev->mutually_exclusive) { |
| 724 | char buf[80]; |
| 725 | char *name; |
| 726 | |
| 727 | /* Count the size of mutually_exclusive array */ |
| 728 | for (index = 0; edev->mutually_exclusive[index]; index++) |
| 729 | ; |
| 730 | |
| 731 | edev->attrs_muex = kzalloc(sizeof(struct attribute *) * |
| 732 | (index + 1), GFP_KERNEL); |
| 733 | if (!edev->attrs_muex) { |
| 734 | ret = -ENOMEM; |
| 735 | goto err_muex; |
| 736 | } |
| 737 | |
| 738 | edev->d_attrs_muex = kzalloc(sizeof(struct device_attribute) * |
| 739 | index, GFP_KERNEL); |
| 740 | if (!edev->d_attrs_muex) { |
| 741 | ret = -ENOMEM; |
| 742 | kfree(edev->attrs_muex); |
| 743 | goto err_muex; |
| 744 | } |
| 745 | |
| 746 | for (index = 0; edev->mutually_exclusive[index]; index++) { |
| 747 | sprintf(buf, "0x%x", edev->mutually_exclusive[index]); |
| 748 | name = kzalloc(sizeof(char) * (strlen(buf) + 1), |
| 749 | GFP_KERNEL); |
| 750 | if (!name) { |
| 751 | for (index--; index >= 0; index--) { |
| 752 | kfree(edev->d_attrs_muex[index].attr. |
| 753 | name); |
| 754 | } |
| 755 | kfree(edev->d_attrs_muex); |
| 756 | kfree(edev->attrs_muex); |
| 757 | ret = -ENOMEM; |
| 758 | goto err_muex; |
| 759 | } |
| 760 | strcpy(name, buf); |
Mark Brown | 9baf322 | 2012-08-16 20:03:21 +0100 | [diff] [blame] | 761 | sysfs_attr_init(&edev->d_attrs_muex[index].attr); |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 762 | edev->d_attrs_muex[index].attr.name = name; |
| 763 | edev->d_attrs_muex[index].attr.mode = 0000; |
| 764 | edev->attrs_muex[index] = &edev->d_attrs_muex[index] |
| 765 | .attr; |
| 766 | } |
| 767 | edev->attr_g_muex.name = muex_name; |
| 768 | edev->attr_g_muex.attrs = edev->attrs_muex; |
| 769 | |
| 770 | } |
| 771 | |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 772 | if (edev->max_supported) { |
| 773 | edev->extcon_dev_type.groups = |
| 774 | kzalloc(sizeof(struct attribute_group *) * |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 775 | (edev->max_supported + 2), GFP_KERNEL); |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 776 | if (!edev->extcon_dev_type.groups) { |
| 777 | ret = -ENOMEM; |
| 778 | goto err_alloc_groups; |
| 779 | } |
| 780 | |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 781 | edev->extcon_dev_type.name = dev_name(&edev->dev); |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 782 | edev->extcon_dev_type.release = dummy_sysfs_dev_release; |
| 783 | |
| 784 | for (index = 0; index < edev->max_supported; index++) |
| 785 | edev->extcon_dev_type.groups[index] = |
| 786 | &edev->cables[index].attr_g; |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 787 | if (edev->mutually_exclusive) |
| 788 | edev->extcon_dev_type.groups[index] = |
| 789 | &edev->attr_g_muex; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 790 | |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 791 | edev->dev.type = &edev->extcon_dev_type; |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 792 | } |
| 793 | |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 794 | ret = device_register(&edev->dev); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 795 | if (ret) { |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 796 | put_device(&edev->dev); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 797 | goto err_dev; |
| 798 | } |
MyungJoo Ham | 449a2bf | 2012-04-23 20:19:57 +0900 | [diff] [blame] | 799 | #if defined(CONFIG_ANDROID) |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 800 | if (switch_class) |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 801 | ret = class_compat_create_link(switch_class, &edev->dev, NULL); |
MyungJoo Ham | 449a2bf | 2012-04-23 20:19:57 +0900 | [diff] [blame] | 802 | #endif /* CONFIG_ANDROID */ |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 803 | |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 804 | spin_lock_init(&edev->lock); |
| 805 | |
Chanwoo Choi | 046050f | 2015-05-19 20:01:12 +0900 | [diff] [blame] | 806 | edev->nh = devm_kzalloc(&edev->dev, |
| 807 | sizeof(*edev->nh) * edev->max_supported, GFP_KERNEL); |
| 808 | if (!edev->nh) { |
| 809 | ret = -ENOMEM; |
| 810 | goto err_dev; |
| 811 | } |
| 812 | |
| 813 | for (index = 0; index < edev->max_supported; index++) |
| 814 | RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]); |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 815 | |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 816 | dev_set_drvdata(&edev->dev, edev); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 817 | edev->state = 0; |
Donggeun Kim | 74c5d09 | 2012-04-20 14:16:24 +0900 | [diff] [blame] | 818 | |
| 819 | mutex_lock(&extcon_dev_list_lock); |
| 820 | list_add(&edev->entry, &extcon_dev_list); |
| 821 | mutex_unlock(&extcon_dev_list_lock); |
| 822 | |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 823 | return 0; |
| 824 | |
| 825 | err_dev: |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 826 | if (edev->max_supported) |
| 827 | kfree(edev->extcon_dev_type.groups); |
| 828 | err_alloc_groups: |
MyungJoo Ham | bde68e6 | 2012-04-20 14:16:26 +0900 | [diff] [blame] | 829 | if (edev->max_supported && edev->mutually_exclusive) { |
| 830 | for (index = 0; edev->mutually_exclusive[index]; index++) |
| 831 | kfree(edev->d_attrs_muex[index].attr.name); |
| 832 | kfree(edev->d_attrs_muex); |
| 833 | kfree(edev->attrs_muex); |
| 834 | } |
| 835 | err_muex: |
MyungJoo Ham | 806d9dd | 2012-04-20 14:16:25 +0900 | [diff] [blame] | 836 | for (index = 0; index < edev->max_supported; index++) |
| 837 | kfree(edev->cables[index].attr_g.name); |
| 838 | err_alloc_cables: |
| 839 | if (edev->max_supported) |
| 840 | kfree(edev->cables); |
| 841 | err_sysfs_alloc: |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 842 | return ret; |
| 843 | } |
| 844 | EXPORT_SYMBOL_GPL(extcon_dev_register); |
| 845 | |
| 846 | /** |
| 847 | * extcon_dev_unregister() - Unregister the extcon device. |
Peter Meerwald | c338bb0 | 2012-08-23 09:11:54 +0900 | [diff] [blame] | 848 | * @edev: the extcon device instance to be unregistered. |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 849 | * |
| 850 | * Note that this does not call kfree(edev) because edev was not allocated |
| 851 | * by this class. |
| 852 | */ |
| 853 | void extcon_dev_unregister(struct extcon_dev *edev) |
| 854 | { |
anish kumar | 57e7cd3 | 2012-10-22 09:43:33 +0900 | [diff] [blame] | 855 | int index; |
| 856 | |
Chanwoo Choi | 7eae43a | 2015-06-21 23:48:36 +0900 | [diff] [blame] | 857 | if (!edev) |
| 858 | return; |
| 859 | |
anish kumar | 57e7cd3 | 2012-10-22 09:43:33 +0900 | [diff] [blame] | 860 | mutex_lock(&extcon_dev_list_lock); |
| 861 | list_del(&edev->entry); |
| 862 | mutex_unlock(&extcon_dev_list_lock); |
| 863 | |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 864 | if (IS_ERR_OR_NULL(get_device(&edev->dev))) { |
| 865 | dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n", |
| 866 | dev_name(&edev->dev)); |
anish kumar | 57e7cd3 | 2012-10-22 09:43:33 +0900 | [diff] [blame] | 867 | return; |
| 868 | } |
| 869 | |
Wang, Xiaoming | 7585ca0 | 2013-11-01 18:48:14 -0400 | [diff] [blame] | 870 | device_unregister(&edev->dev); |
| 871 | |
anish kumar | 57e7cd3 | 2012-10-22 09:43:33 +0900 | [diff] [blame] | 872 | if (edev->mutually_exclusive && edev->max_supported) { |
| 873 | for (index = 0; edev->mutually_exclusive[index]; |
| 874 | index++) |
| 875 | kfree(edev->d_attrs_muex[index].attr.name); |
| 876 | kfree(edev->d_attrs_muex); |
| 877 | kfree(edev->attrs_muex); |
| 878 | } |
| 879 | |
| 880 | for (index = 0; index < edev->max_supported; index++) |
| 881 | kfree(edev->cables[index].attr_g.name); |
| 882 | |
| 883 | if (edev->max_supported) { |
| 884 | kfree(edev->extcon_dev_type.groups); |
| 885 | kfree(edev->cables); |
| 886 | } |
| 887 | |
| 888 | #if defined(CONFIG_ANDROID) |
| 889 | if (switch_class) |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 890 | class_compat_remove_link(switch_class, &edev->dev, NULL); |
anish kumar | 57e7cd3 | 2012-10-22 09:43:33 +0900 | [diff] [blame] | 891 | #endif |
Chanwoo Choi | dae6165 | 2013-09-27 09:19:40 +0900 | [diff] [blame] | 892 | put_device(&edev->dev); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 893 | } |
| 894 | EXPORT_SYMBOL_GPL(extcon_dev_unregister); |
| 895 | |
Chanwoo Choi | 1ad94ff | 2014-03-18 19:55:46 +0900 | [diff] [blame] | 896 | #ifdef CONFIG_OF |
| 897 | /* |
| 898 | * extcon_get_edev_by_phandle - Get the extcon device from devicetree |
| 899 | * @dev - instance to the given device |
| 900 | * @index - index into list of extcon_dev |
| 901 | * |
| 902 | * return the instance of extcon device |
| 903 | */ |
| 904 | struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) |
| 905 | { |
| 906 | struct device_node *node; |
| 907 | struct extcon_dev *edev; |
| 908 | |
Chanwoo Choi | 7eae43a | 2015-06-21 23:48:36 +0900 | [diff] [blame] | 909 | if (!dev) |
| 910 | return ERR_PTR(-EINVAL); |
| 911 | |
Chanwoo Choi | 1ad94ff | 2014-03-18 19:55:46 +0900 | [diff] [blame] | 912 | if (!dev->of_node) { |
Stephen Boyd | e8752b7 | 2016-07-05 11:57:05 -0700 | [diff] [blame] | 913 | dev_dbg(dev, "device does not have a device node entry\n"); |
Chanwoo Choi | 1ad94ff | 2014-03-18 19:55:46 +0900 | [diff] [blame] | 914 | return ERR_PTR(-EINVAL); |
| 915 | } |
| 916 | |
| 917 | node = of_parse_phandle(dev->of_node, "extcon", index); |
| 918 | if (!node) { |
Stephen Boyd | e8752b7 | 2016-07-05 11:57:05 -0700 | [diff] [blame] | 919 | dev_dbg(dev, "failed to get phandle in %s node\n", |
Chanwoo Choi | 1ad94ff | 2014-03-18 19:55:46 +0900 | [diff] [blame] | 920 | dev->of_node->full_name); |
| 921 | return ERR_PTR(-ENODEV); |
| 922 | } |
| 923 | |
Tomasz Figa | f841afb | 2014-10-16 15:11:44 +0200 | [diff] [blame] | 924 | mutex_lock(&extcon_dev_list_lock); |
| 925 | list_for_each_entry(edev, &extcon_dev_list, entry) { |
| 926 | if (edev->dev.parent && edev->dev.parent->of_node == node) { |
| 927 | mutex_unlock(&extcon_dev_list_lock); |
Peter Chen | 5d5c4c1 | 2016-07-01 18:41:55 +0900 | [diff] [blame] | 928 | of_node_put(node); |
Tomasz Figa | f841afb | 2014-10-16 15:11:44 +0200 | [diff] [blame] | 929 | return edev; |
| 930 | } |
Chanwoo Choi | 1ad94ff | 2014-03-18 19:55:46 +0900 | [diff] [blame] | 931 | } |
Tomasz Figa | f841afb | 2014-10-16 15:11:44 +0200 | [diff] [blame] | 932 | mutex_unlock(&extcon_dev_list_lock); |
Peter Chen | 5d5c4c1 | 2016-07-01 18:41:55 +0900 | [diff] [blame] | 933 | of_node_put(node); |
Chanwoo Choi | 1ad94ff | 2014-03-18 19:55:46 +0900 | [diff] [blame] | 934 | |
Tomasz Figa | f841afb | 2014-10-16 15:11:44 +0200 | [diff] [blame] | 935 | return ERR_PTR(-EPROBE_DEFER); |
Chanwoo Choi | 1ad94ff | 2014-03-18 19:55:46 +0900 | [diff] [blame] | 936 | } |
| 937 | #else |
| 938 | struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) |
| 939 | { |
| 940 | return ERR_PTR(-ENOSYS); |
| 941 | } |
| 942 | #endif /* CONFIG_OF */ |
| 943 | EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle); |
| 944 | |
Chanwoo Choi | 707d755 | 2015-04-15 13:57:51 +0900 | [diff] [blame] | 945 | /** |
| 946 | * extcon_get_edev_name() - Get the name of the extcon device. |
| 947 | * @edev: the extcon device |
| 948 | */ |
| 949 | const char *extcon_get_edev_name(struct extcon_dev *edev) |
| 950 | { |
| 951 | return !edev ? NULL : edev->name; |
| 952 | } |
| 953 | |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 954 | static int __init extcon_class_init(void) |
| 955 | { |
| 956 | return create_extcon_class(); |
| 957 | } |
| 958 | module_init(extcon_class_init); |
| 959 | |
| 960 | static void __exit extcon_class_exit(void) |
| 961 | { |
Peter Huewe | 0dc77b6 | 2012-09-24 15:32:31 +0900 | [diff] [blame] | 962 | #if defined(CONFIG_ANDROID) |
| 963 | class_compat_unregister(switch_class); |
| 964 | #endif |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 965 | class_destroy(extcon_class); |
| 966 | } |
| 967 | module_exit(extcon_class_exit); |
| 968 | |
Chanwoo Choi | 2a9de9c | 2015-04-24 19:16:05 +0900 | [diff] [blame] | 969 | MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); |
MyungJoo Ham | de55d87 | 2012-04-20 14:16:22 +0900 | [diff] [blame] | 970 | MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>"); |
| 971 | MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>"); |
| 972 | MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); |
| 973 | MODULE_DESCRIPTION("External connector (extcon) class driver"); |
| 974 | MODULE_LICENSE("GPL"); |