1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * drivers/extcon/extcon.c - External Connector (extcon) framework. 4 * 5 * Copyright (C) 2015 Samsung Electronics 6 * Author: Chanwoo Choi <cw00.choi@samsung.com> 7 * 8 * Copyright (C) 2012 Samsung Electronics 9 * Author: Donggeun Kim <dg77.kim@samsung.com> 10 * Author: MyungJoo Ham <myungjoo.ham@samsung.com> 11 * 12 * based on android/drivers/switch/switch_class.c 13 * Copyright (C) 2008 Google, Inc. 14 * Author: Mike Lockwood <lockwood@android.com> 15 */ 16 17 #include <linux/module.h> 18 #include <linux/types.h> 19 #include <linux/init.h> 20 #include <linux/device.h> 21 #include <linux/fs.h> 22 #include <linux/err.h> 23 #include <linux/of.h> 24 #include <linux/slab.h> 25 #include <linux/sysfs.h> 26 27 #include "extcon.h" 28 29 #define SUPPORTED_CABLE_MAX 32 30 31 static const struct __extcon_info { 32 unsigned int type; 33 unsigned int id; 34 const char *name; 35 36 } extcon_info[] = { 37 [EXTCON_NONE] = { 38 .type = EXTCON_TYPE_MISC, 39 .id = EXTCON_NONE, 40 .name = "NONE", 41 }, 42 43 /* USB external connector */ 44 [EXTCON_USB] = { 45 .type = EXTCON_TYPE_USB, 46 .id = EXTCON_USB, 47 .name = "USB", 48 }, 49 [EXTCON_USB_HOST] = { 50 .type = EXTCON_TYPE_USB, 51 .id = EXTCON_USB_HOST, 52 .name = "USB-HOST", 53 }, 54 55 /* Charging external connector */ 56 [EXTCON_CHG_USB_SDP] = { 57 .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 58 .id = EXTCON_CHG_USB_SDP, 59 .name = "SDP", 60 }, 61 [EXTCON_CHG_USB_DCP] = { 62 .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 63 .id = EXTCON_CHG_USB_DCP, 64 .name = "DCP", 65 }, 66 [EXTCON_CHG_USB_CDP] = { 67 .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 68 .id = EXTCON_CHG_USB_CDP, 69 .name = "CDP", 70 }, 71 [EXTCON_CHG_USB_ACA] = { 72 .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 73 .id = EXTCON_CHG_USB_ACA, 74 .name = "ACA", 75 }, 76 [EXTCON_CHG_USB_FAST] = { 77 .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 78 .id = EXTCON_CHG_USB_FAST, 79 .name = "FAST-CHARGER", 80 }, 81 [EXTCON_CHG_USB_SLOW] = { 82 .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 83 .id = EXTCON_CHG_USB_SLOW, 84 .name = "SLOW-CHARGER", 85 }, 86 [EXTCON_CHG_WPT] = { 87 .type = EXTCON_TYPE_CHG, 88 .id = EXTCON_CHG_WPT, 89 .name = "WPT", 90 }, 91 [EXTCON_CHG_USB_PD] = { 92 .type = EXTCON_TYPE_CHG | EXTCON_TYPE_USB, 93 .id = EXTCON_CHG_USB_PD, 94 .name = "PD", 95 }, 96 97 /* Jack external connector */ 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 }, 138 139 /* Display external connector */ 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 }, 160 [EXTCON_DISP_DP] = { 161 .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB, 162 .id = EXTCON_DISP_DP, 163 .name = "DP", 164 }, 165 [EXTCON_DISP_HMD] = { 166 .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB, 167 .id = EXTCON_DISP_HMD, 168 .name = "HMD", 169 }, 170 171 /* Miscellaneous external connector */ 172 [EXTCON_DOCK] = { 173 .type = EXTCON_TYPE_MISC, 174 .id = EXTCON_DOCK, 175 .name = "DOCK", 176 }, 177 [EXTCON_JIG] = { 178 .type = EXTCON_TYPE_MISC, 179 .id = EXTCON_JIG, 180 .name = "JIG", 181 }, 182 [EXTCON_MECHANICAL] = { 183 .type = EXTCON_TYPE_MISC, 184 .id = EXTCON_MECHANICAL, 185 .name = "MECHANICAL", 186 }, 187 188 { /* sentinel */ } 189 }; 190 191 /** 192 * struct extcon_cable - An internal data for an external connector. 193 * @edev: the extcon device 194 * @cable_index: the index of this cable in the edev 195 * @attr_g: the attribute group for the cable 196 * @attr_name: "name" sysfs entry 197 * @attr_state: "state" sysfs entry 198 * @attrs: the array pointing to attr_name and attr_state for attr_g 199 */ 200 struct extcon_cable { 201 struct extcon_dev *edev; 202 int cable_index; 203 204 struct attribute_group attr_g; 205 struct device_attribute attr_name; 206 struct device_attribute attr_state; 207 208 struct attribute *attrs[3]; /* to be fed to attr_g.attrs */ 209 210 union extcon_property_value usb_propval[EXTCON_PROP_USB_CNT]; 211 union extcon_property_value chg_propval[EXTCON_PROP_CHG_CNT]; 212 union extcon_property_value jack_propval[EXTCON_PROP_JACK_CNT]; 213 union extcon_property_value disp_propval[EXTCON_PROP_DISP_CNT]; 214 215 unsigned long usb_bits[BITS_TO_LONGS(EXTCON_PROP_USB_CNT)]; 216 unsigned long chg_bits[BITS_TO_LONGS(EXTCON_PROP_CHG_CNT)]; 217 unsigned long jack_bits[BITS_TO_LONGS(EXTCON_PROP_JACK_CNT)]; 218 unsigned long disp_bits[BITS_TO_LONGS(EXTCON_PROP_DISP_CNT)]; 219 }; 220 221 static struct class *extcon_class; 222 223 static LIST_HEAD(extcon_dev_list); 224 static DEFINE_MUTEX(extcon_dev_list_lock); 225 226 static int check_mutually_exclusive(struct extcon_dev *edev, u32 new_state) 227 { 228 int i = 0; 229 230 if (!edev->mutually_exclusive) 231 return 0; 232 233 for (i = 0; edev->mutually_exclusive[i]; i++) { 234 int weight; 235 u32 correspondants = new_state & edev->mutually_exclusive[i]; 236 237 /* calculate the total number of bits set */ 238 weight = hweight32(correspondants); 239 if (weight > 1) 240 return i + 1; 241 } 242 243 return 0; 244 } 245 246 static int find_cable_index_by_id(struct extcon_dev *edev, const unsigned int id) 247 { 248 int i; 249 250 /* Find the the index of extcon cable in edev->supported_cable */ 251 for (i = 0; i < edev->max_supported; i++) { 252 if (edev->supported_cable[i] == id) 253 return i; 254 } 255 256 return -EINVAL; 257 } 258 259 static int get_extcon_type(unsigned int prop) 260 { 261 switch (prop) { 262 case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 263 return EXTCON_TYPE_USB; 264 case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 265 return EXTCON_TYPE_CHG; 266 case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 267 return EXTCON_TYPE_JACK; 268 case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 269 return EXTCON_TYPE_DISP; 270 default: 271 return -EINVAL; 272 } 273 } 274 275 static bool is_extcon_attached(struct extcon_dev *edev, unsigned int index) 276 { 277 return !!(edev->state & BIT(index)); 278 } 279 280 static bool is_extcon_changed(struct extcon_dev *edev, int index, 281 bool new_state) 282 { 283 int state = !!(edev->state & BIT(index)); 284 return (state != new_state); 285 } 286 287 static bool is_extcon_property_supported(unsigned int id, unsigned int prop) 288 { 289 int type; 290 291 /* Check whether the property is supported or not. */ 292 type = get_extcon_type(prop); 293 if (type < 0) 294 return false; 295 296 /* Check whether a specific extcon id supports the property or not. */ 297 return !!(extcon_info[id].type & type); 298 } 299 300 static int is_extcon_property_capability(struct extcon_dev *edev, 301 unsigned int id, int index,unsigned int prop) 302 { 303 struct extcon_cable *cable; 304 int type, ret; 305 306 /* Check whether the property is supported or not. */ 307 type = get_extcon_type(prop); 308 if (type < 0) 309 return type; 310 311 cable = &edev->cables[index]; 312 313 switch (type) { 314 case EXTCON_TYPE_USB: 315 ret = test_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); 316 break; 317 case EXTCON_TYPE_CHG: 318 ret = test_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); 319 break; 320 case EXTCON_TYPE_JACK: 321 ret = test_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); 322 break; 323 case EXTCON_TYPE_DISP: 324 ret = test_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); 325 break; 326 default: 327 ret = -EINVAL; 328 } 329 330 return ret; 331 } 332 333 static void init_property(struct extcon_dev *edev, unsigned int id, int index) 334 { 335 unsigned int type = extcon_info[id].type; 336 struct extcon_cable *cable = &edev->cables[index]; 337 338 if (EXTCON_TYPE_USB & type) 339 memset(cable->usb_propval, 0, sizeof(cable->usb_propval)); 340 if (EXTCON_TYPE_CHG & type) 341 memset(cable->chg_propval, 0, sizeof(cable->chg_propval)); 342 if (EXTCON_TYPE_JACK & type) 343 memset(cable->jack_propval, 0, sizeof(cable->jack_propval)); 344 if (EXTCON_TYPE_DISP & type) 345 memset(cable->disp_propval, 0, sizeof(cable->disp_propval)); 346 } 347 348 static ssize_t state_show(struct device *dev, struct device_attribute *attr, 349 char *buf) 350 { 351 int i, count = 0; 352 struct extcon_dev *edev = dev_get_drvdata(dev); 353 354 if (edev->max_supported == 0) 355 return sprintf(buf, "%u\n", edev->state); 356 357 for (i = 0; i < edev->max_supported; i++) { 358 count += sprintf(buf + count, "%s=%d\n", 359 extcon_info[edev->supported_cable[i]].name, 360 !!(edev->state & BIT(i))); 361 } 362 363 return count; 364 } 365 static DEVICE_ATTR_RO(state); 366 367 static ssize_t name_show(struct device *dev, struct device_attribute *attr, 368 char *buf) 369 { 370 struct extcon_dev *edev = dev_get_drvdata(dev); 371 372 return sprintf(buf, "%s\n", edev->name); 373 } 374 static DEVICE_ATTR_RO(name); 375 376 static ssize_t cable_name_show(struct device *dev, 377 struct device_attribute *attr, char *buf) 378 { 379 struct extcon_cable *cable = container_of(attr, struct extcon_cable, 380 attr_name); 381 int i = cable->cable_index; 382 383 return sprintf(buf, "%s\n", 384 extcon_info[cable->edev->supported_cable[i]].name); 385 } 386 387 static ssize_t cable_state_show(struct device *dev, 388 struct device_attribute *attr, char *buf) 389 { 390 struct extcon_cable *cable = container_of(attr, struct extcon_cable, 391 attr_state); 392 393 int i = cable->cable_index; 394 395 return sprintf(buf, "%d\n", 396 extcon_get_state(cable->edev, cable->edev->supported_cable[i])); 397 } 398 399 /** 400 * extcon_sync() - Synchronize the state for an external connector. 401 * @edev: the extcon device 402 * 403 * Note that this function send a notification in order to synchronize 404 * the state and property of an external connector. 405 * 406 * Returns 0 if success or error number if fail. 407 */ 408 int extcon_sync(struct extcon_dev *edev, unsigned int id) 409 { 410 char name_buf[120]; 411 char state_buf[120]; 412 char *prop_buf; 413 char *envp[3]; 414 int env_offset = 0; 415 int length; 416 int index; 417 int state; 418 unsigned long flags; 419 420 if (!edev) 421 return -EINVAL; 422 423 index = find_cable_index_by_id(edev, id); 424 if (index < 0) 425 return index; 426 427 spin_lock_irqsave(&edev->lock, flags); 428 state = !!(edev->state & BIT(index)); 429 spin_unlock_irqrestore(&edev->lock, flags); 430 431 /* 432 * Call functions in a raw notifier chain for the specific one 433 * external connector. 434 */ 435 raw_notifier_call_chain(&edev->nh[index], state, edev); 436 437 /* 438 * Call functions in a raw notifier chain for the all supported 439 * external connectors. 440 */ 441 raw_notifier_call_chain(&edev->nh_all, state, edev); 442 443 spin_lock_irqsave(&edev->lock, flags); 444 /* This could be in interrupt handler */ 445 prop_buf = (char *)get_zeroed_page(GFP_ATOMIC); 446 if (!prop_buf) { 447 /* Unlock early before uevent */ 448 spin_unlock_irqrestore(&edev->lock, flags); 449 450 dev_err(&edev->dev, "out of memory in extcon_set_state\n"); 451 kobject_uevent(&edev->dev.kobj, KOBJ_CHANGE); 452 453 return -ENOMEM; 454 } 455 456 length = name_show(&edev->dev, NULL, prop_buf); 457 if (length > 0) { 458 if (prop_buf[length - 1] == '\n') 459 prop_buf[length - 1] = 0; 460 snprintf(name_buf, sizeof(name_buf), "NAME=%s", prop_buf); 461 envp[env_offset++] = name_buf; 462 } 463 464 length = state_show(&edev->dev, NULL, prop_buf); 465 if (length > 0) { 466 if (prop_buf[length - 1] == '\n') 467 prop_buf[length - 1] = 0; 468 snprintf(state_buf, sizeof(state_buf), "STATE=%s", prop_buf); 469 envp[env_offset++] = state_buf; 470 } 471 envp[env_offset] = NULL; 472 473 /* Unlock early before uevent */ 474 spin_unlock_irqrestore(&edev->lock, flags); 475 kobject_uevent_env(&edev->dev.kobj, KOBJ_CHANGE, envp); 476 free_page((unsigned long)prop_buf); 477 478 return 0; 479 } 480 EXPORT_SYMBOL_GPL(extcon_sync); 481 482 /** 483 * extcon_get_state() - Get the state of an external connector. 484 * @edev: the extcon device 485 * @id: the unique id indicating an external connector 486 * 487 * Returns 0 if success or error number if fail. 488 */ 489 int extcon_get_state(struct extcon_dev *edev, const unsigned int id) 490 { 491 int index, state; 492 unsigned long flags; 493 494 if (!edev) 495 return -EINVAL; 496 497 index = find_cable_index_by_id(edev, id); 498 if (index < 0) 499 return index; 500 501 spin_lock_irqsave(&edev->lock, flags); 502 state = is_extcon_attached(edev, index); 503 spin_unlock_irqrestore(&edev->lock, flags); 504 505 return state; 506 } 507 EXPORT_SYMBOL_GPL(extcon_get_state); 508 509 /** 510 * extcon_set_state() - Set the state of an external connector. 511 * @edev: the extcon device 512 * @id: the unique id indicating an external connector 513 * @state: the new state of an external connector. 514 * the default semantics is true: attached / false: detached. 515 * 516 * Note that this function set the state of an external connector without 517 * a notification. To synchronize the state of an external connector, 518 * have to use extcon_set_state_sync() and extcon_sync(). 519 * 520 * Returns 0 if success or error number if fail. 521 */ 522 int extcon_set_state(struct extcon_dev *edev, unsigned int id, bool state) 523 { 524 unsigned long flags; 525 int index, ret = 0; 526 527 if (!edev) 528 return -EINVAL; 529 530 index = find_cable_index_by_id(edev, id); 531 if (index < 0) 532 return index; 533 534 spin_lock_irqsave(&edev->lock, flags); 535 536 /* Check whether the external connector's state is changed. */ 537 if (!is_extcon_changed(edev, index, state)) 538 goto out; 539 540 if (check_mutually_exclusive(edev, 541 (edev->state & ~BIT(index)) | (state & BIT(index)))) { 542 ret = -EPERM; 543 goto out; 544 } 545 546 /* 547 * Initialize the value of extcon property before setting 548 * the detached state for an external connector. 549 */ 550 if (!state) 551 init_property(edev, id, index); 552 553 /* Update the state for an external connector. */ 554 if (state) 555 edev->state |= BIT(index); 556 else 557 edev->state &= ~(BIT(index)); 558 out: 559 spin_unlock_irqrestore(&edev->lock, flags); 560 561 return ret; 562 } 563 EXPORT_SYMBOL_GPL(extcon_set_state); 564 565 /** 566 * extcon_set_state_sync() - Set the state of an external connector with sync. 567 * @edev: the extcon device 568 * @id: the unique id indicating an external connector 569 * @state: the new state of external connector. 570 * the default semantics is true: attached / false: detached. 571 * 572 * Note that this function set the state of external connector 573 * and synchronize the state by sending a notification. 574 * 575 * Returns 0 if success or error number if fail. 576 */ 577 int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id, bool state) 578 { 579 int ret, index; 580 unsigned long flags; 581 582 index = find_cable_index_by_id(edev, id); 583 if (index < 0) 584 return index; 585 586 /* Check whether the external connector's state is changed. */ 587 spin_lock_irqsave(&edev->lock, flags); 588 ret = is_extcon_changed(edev, index, state); 589 spin_unlock_irqrestore(&edev->lock, flags); 590 if (!ret) 591 return 0; 592 593 ret = extcon_set_state(edev, id, state); 594 if (ret < 0) 595 return ret; 596 597 return extcon_sync(edev, id); 598 } 599 EXPORT_SYMBOL_GPL(extcon_set_state_sync); 600 601 /** 602 * extcon_get_property() - Get the property value of an external connector. 603 * @edev: the extcon device 604 * @id: the unique id indicating an external connector 605 * @prop: the property id indicating an extcon property 606 * @prop_val: the pointer which store the value of extcon property 607 * 608 * Note that when getting the property value of external connector, 609 * the external connector should be attached. If detached state, function 610 * return 0 without property value. Also, the each property should be 611 * included in the list of supported properties according to extcon type. 612 * 613 * Returns 0 if success or error number if fail. 614 */ 615 int extcon_get_property(struct extcon_dev *edev, unsigned int id, 616 unsigned int prop, 617 union extcon_property_value *prop_val) 618 { 619 struct extcon_cable *cable; 620 unsigned long flags; 621 int index, ret = 0; 622 623 *prop_val = (union extcon_property_value){0}; 624 625 if (!edev) 626 return -EINVAL; 627 628 /* Check whether the property is supported or not */ 629 if (!is_extcon_property_supported(id, prop)) 630 return -EINVAL; 631 632 /* Find the cable index of external connector by using id */ 633 index = find_cable_index_by_id(edev, id); 634 if (index < 0) 635 return index; 636 637 spin_lock_irqsave(&edev->lock, flags); 638 639 /* Check whether the property is available or not. */ 640 if (!is_extcon_property_capability(edev, id, index, prop)) { 641 spin_unlock_irqrestore(&edev->lock, flags); 642 return -EPERM; 643 } 644 645 /* 646 * Check whether the external connector is attached. 647 * If external connector is detached, the user can not 648 * get the property value. 649 */ 650 if (!is_extcon_attached(edev, index)) { 651 spin_unlock_irqrestore(&edev->lock, flags); 652 return 0; 653 } 654 655 cable = &edev->cables[index]; 656 657 /* Get the property value according to extcon type */ 658 switch (prop) { 659 case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 660 *prop_val = cable->usb_propval[prop - EXTCON_PROP_USB_MIN]; 661 break; 662 case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 663 *prop_val = cable->chg_propval[prop - EXTCON_PROP_CHG_MIN]; 664 break; 665 case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 666 *prop_val = cable->jack_propval[prop - EXTCON_PROP_JACK_MIN]; 667 break; 668 case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 669 *prop_val = cable->disp_propval[prop - EXTCON_PROP_DISP_MIN]; 670 break; 671 default: 672 ret = -EINVAL; 673 break; 674 } 675 676 spin_unlock_irqrestore(&edev->lock, flags); 677 678 return ret; 679 } 680 EXPORT_SYMBOL_GPL(extcon_get_property); 681 682 /** 683 * extcon_set_property() - Set the property value of an external connector. 684 * @edev: the extcon device 685 * @id: the unique id indicating an external connector 686 * @prop: the property id indicating an extcon property 687 * @prop_val: the pointer including the new value of extcon property 688 * 689 * Note that each property should be included in the list of supported 690 * properties according to the extcon type. 691 * 692 * Returns 0 if success or error number if fail. 693 */ 694 int extcon_set_property(struct extcon_dev *edev, unsigned int id, 695 unsigned int prop, 696 union extcon_property_value prop_val) 697 { 698 struct extcon_cable *cable; 699 unsigned long flags; 700 int index, ret = 0; 701 702 if (!edev) 703 return -EINVAL; 704 705 /* Check whether the property is supported or not */ 706 if (!is_extcon_property_supported(id, prop)) 707 return -EINVAL; 708 709 /* Find the cable index of external connector by using id */ 710 index = find_cable_index_by_id(edev, id); 711 if (index < 0) 712 return index; 713 714 spin_lock_irqsave(&edev->lock, flags); 715 716 /* Check whether the property is available or not. */ 717 if (!is_extcon_property_capability(edev, id, index, prop)) { 718 spin_unlock_irqrestore(&edev->lock, flags); 719 return -EPERM; 720 } 721 722 cable = &edev->cables[index]; 723 724 /* Set the property value according to extcon type */ 725 switch (prop) { 726 case EXTCON_PROP_USB_MIN ... EXTCON_PROP_USB_MAX: 727 cable->usb_propval[prop - EXTCON_PROP_USB_MIN] = prop_val; 728 break; 729 case EXTCON_PROP_CHG_MIN ... EXTCON_PROP_CHG_MAX: 730 cable->chg_propval[prop - EXTCON_PROP_CHG_MIN] = prop_val; 731 break; 732 case EXTCON_PROP_JACK_MIN ... EXTCON_PROP_JACK_MAX: 733 cable->jack_propval[prop - EXTCON_PROP_JACK_MIN] = prop_val; 734 break; 735 case EXTCON_PROP_DISP_MIN ... EXTCON_PROP_DISP_MAX: 736 cable->disp_propval[prop - EXTCON_PROP_DISP_MIN] = prop_val; 737 break; 738 default: 739 ret = -EINVAL; 740 break; 741 } 742 743 spin_unlock_irqrestore(&edev->lock, flags); 744 745 return ret; 746 } 747 EXPORT_SYMBOL_GPL(extcon_set_property); 748 749 /** 750 * extcon_set_property_sync() - Set property of an external connector with sync. 751 * @prop_val: the pointer including the new value of extcon property 752 * 753 * Note that when setting the property value of external connector, 754 * the external connector should be attached. The each property should 755 * be included in the list of supported properties according to extcon type. 756 * 757 * Returns 0 if success or error number if fail. 758 */ 759 int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id, 760 unsigned int prop, 761 union extcon_property_value prop_val) 762 { 763 int ret; 764 765 ret = extcon_set_property(edev, id, prop, prop_val); 766 if (ret < 0) 767 return ret; 768 769 return extcon_sync(edev, id); 770 } 771 EXPORT_SYMBOL_GPL(extcon_set_property_sync); 772 773 /** 774 * extcon_get_property_capability() - Get the capability of the property 775 * for an external connector. 776 * @edev: the extcon device 777 * @id: the unique id indicating an external connector 778 * @prop: the property id indicating an extcon property 779 * 780 * Returns 1 if the property is available or 0 if not available. 781 */ 782 int extcon_get_property_capability(struct extcon_dev *edev, unsigned int id, 783 unsigned int prop) 784 { 785 int index; 786 787 if (!edev) 788 return -EINVAL; 789 790 /* Check whether the property is supported or not */ 791 if (!is_extcon_property_supported(id, prop)) 792 return -EINVAL; 793 794 /* Find the cable index of external connector by using id */ 795 index = find_cable_index_by_id(edev, id); 796 if (index < 0) 797 return index; 798 799 return is_extcon_property_capability(edev, id, index, prop); 800 } 801 EXPORT_SYMBOL_GPL(extcon_get_property_capability); 802 803 /** 804 * extcon_set_property_capability() - Set the capability of the property 805 * for an external connector. 806 * @edev: the extcon device 807 * @id: the unique id indicating an external connector 808 * @prop: the property id indicating an extcon property 809 * 810 * Note that this function set the capability of the property 811 * for an external connector in order to mark the bit in capability 812 * bitmap which mean the available state of the property. 813 * 814 * Returns 0 if success or error number if fail. 815 */ 816 int extcon_set_property_capability(struct extcon_dev *edev, unsigned int id, 817 unsigned int prop) 818 { 819 struct extcon_cable *cable; 820 int index, type, ret = 0; 821 822 if (!edev) 823 return -EINVAL; 824 825 /* Check whether the property is supported or not. */ 826 if (!is_extcon_property_supported(id, prop)) 827 return -EINVAL; 828 829 /* Find the cable index of external connector by using id. */ 830 index = find_cable_index_by_id(edev, id); 831 if (index < 0) 832 return index; 833 834 type = get_extcon_type(prop); 835 if (type < 0) 836 return type; 837 838 cable = &edev->cables[index]; 839 840 switch (type) { 841 case EXTCON_TYPE_USB: 842 __set_bit(prop - EXTCON_PROP_USB_MIN, cable->usb_bits); 843 break; 844 case EXTCON_TYPE_CHG: 845 __set_bit(prop - EXTCON_PROP_CHG_MIN, cable->chg_bits); 846 break; 847 case EXTCON_TYPE_JACK: 848 __set_bit(prop - EXTCON_PROP_JACK_MIN, cable->jack_bits); 849 break; 850 case EXTCON_TYPE_DISP: 851 __set_bit(prop - EXTCON_PROP_DISP_MIN, cable->disp_bits); 852 break; 853 default: 854 ret = -EINVAL; 855 } 856 857 return ret; 858 } 859 EXPORT_SYMBOL_GPL(extcon_set_property_capability); 860 861 /** 862 * extcon_get_extcon_dev() - Get the extcon device instance from the name. 863 * @extcon_name: the extcon name provided with extcon_dev_register() 864 * 865 * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 866 */ 867 struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) 868 { 869 struct extcon_dev *sd; 870 871 if (!extcon_name) 872 return ERR_PTR(-EINVAL); 873 874 mutex_lock(&extcon_dev_list_lock); 875 list_for_each_entry(sd, &extcon_dev_list, entry) { 876 if (!strcmp(sd->name, extcon_name)) 877 goto out; 878 } 879 sd = NULL; 880 out: 881 mutex_unlock(&extcon_dev_list_lock); 882 return sd; 883 } 884 EXPORT_SYMBOL_GPL(extcon_get_extcon_dev); 885 886 /** 887 * extcon_register_notifier() - Register a notifier block to get notified by 888 * any state changes from the extcon. 889 * @edev: the extcon device 890 * @id: the unique id indicating an external connector 891 * @nb: a notifier block to be registered 892 * 893 * Note that the second parameter given to the callback of nb (val) is 894 * the current state of an external connector and the third pameter 895 * is the pointer of extcon device. 896 * 897 * Returns 0 if success or error number if fail. 898 */ 899 int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, 900 struct notifier_block *nb) 901 { 902 unsigned long flags; 903 int ret, idx = -EINVAL; 904 905 if (!edev || !nb) 906 return -EINVAL; 907 908 idx = find_cable_index_by_id(edev, id); 909 if (idx < 0) 910 return idx; 911 912 spin_lock_irqsave(&edev->lock, flags); 913 ret = raw_notifier_chain_register(&edev->nh[idx], nb); 914 spin_unlock_irqrestore(&edev->lock, flags); 915 916 return ret; 917 } 918 EXPORT_SYMBOL_GPL(extcon_register_notifier); 919 920 /** 921 * extcon_unregister_notifier() - Unregister a notifier block from the extcon. 922 * @edev: the extcon device 923 * @id: the unique id indicating an external connector 924 * @nb: a notifier block to be registered 925 * 926 * Returns 0 if success or error number if fail. 927 */ 928 int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, 929 struct notifier_block *nb) 930 { 931 unsigned long flags; 932 int ret, idx; 933 934 if (!edev || !nb) 935 return -EINVAL; 936 937 idx = find_cable_index_by_id(edev, id); 938 if (idx < 0) 939 return idx; 940 941 spin_lock_irqsave(&edev->lock, flags); 942 ret = raw_notifier_chain_unregister(&edev->nh[idx], nb); 943 spin_unlock_irqrestore(&edev->lock, flags); 944 945 return ret; 946 } 947 EXPORT_SYMBOL_GPL(extcon_unregister_notifier); 948 949 /** 950 * extcon_register_notifier_all() - Register a notifier block for all connectors. 951 * @edev: the extcon device 952 * @nb: a notifier block to be registered 953 * 954 * Note that this function registers a notifier block in order to receive 955 * the state change of all supported external connectors from extcon device. 956 * And the second parameter given to the callback of nb (val) is 957 * the current state and the third pameter is the pointer of extcon device. 958 * 959 * Returns 0 if success or error number if fail. 960 */ 961 int extcon_register_notifier_all(struct extcon_dev *edev, 962 struct notifier_block *nb) 963 { 964 unsigned long flags; 965 int ret; 966 967 if (!edev || !nb) 968 return -EINVAL; 969 970 spin_lock_irqsave(&edev->lock, flags); 971 ret = raw_notifier_chain_register(&edev->nh_all, nb); 972 spin_unlock_irqrestore(&edev->lock, flags); 973 974 return ret; 975 } 976 EXPORT_SYMBOL_GPL(extcon_register_notifier_all); 977 978 /** 979 * extcon_unregister_notifier_all() - Unregister a notifier block from extcon. 980 * @edev: the extcon device 981 * @nb: a notifier block to be registered 982 * 983 * Returns 0 if success or error number if fail. 984 */ 985 int extcon_unregister_notifier_all(struct extcon_dev *edev, 986 struct notifier_block *nb) 987 { 988 unsigned long flags; 989 int ret; 990 991 if (!edev || !nb) 992 return -EINVAL; 993 994 spin_lock_irqsave(&edev->lock, flags); 995 ret = raw_notifier_chain_unregister(&edev->nh_all, nb); 996 spin_unlock_irqrestore(&edev->lock, flags); 997 998 return ret; 999 } 1000 EXPORT_SYMBOL_GPL(extcon_unregister_notifier_all); 1001 1002 static struct attribute *extcon_attrs[] = { 1003 &dev_attr_state.attr, 1004 &dev_attr_name.attr, 1005 NULL, 1006 }; 1007 ATTRIBUTE_GROUPS(extcon); 1008 1009 static int create_extcon_class(void) 1010 { 1011 if (!extcon_class) { 1012 extcon_class = class_create(THIS_MODULE, "extcon"); 1013 if (IS_ERR(extcon_class)) 1014 return PTR_ERR(extcon_class); 1015 extcon_class->dev_groups = extcon_groups; 1016 } 1017 1018 return 0; 1019 } 1020 1021 static void extcon_dev_release(struct device *dev) 1022 { 1023 } 1024 1025 static const char *muex_name = "mutually_exclusive"; 1026 static void dummy_sysfs_dev_release(struct device *dev) 1027 { 1028 } 1029 1030 /* 1031 * extcon_dev_allocate() - Allocate the memory of extcon device. 1032 * @supported_cable: the array of the supported external connectors 1033 * ending with EXTCON_NONE. 1034 * 1035 * Note that this function allocates the memory for extcon device 1036 * and initialize default setting for the extcon device. 1037 * 1038 * Returns the pointer memory of allocated extcon_dev if success 1039 * or ERR_PTR(err) if fail. 1040 */ 1041 struct extcon_dev *extcon_dev_allocate(const unsigned int *supported_cable) 1042 { 1043 struct extcon_dev *edev; 1044 1045 if (!supported_cable) 1046 return ERR_PTR(-EINVAL); 1047 1048 edev = kzalloc(sizeof(*edev), GFP_KERNEL); 1049 if (!edev) 1050 return ERR_PTR(-ENOMEM); 1051 1052 edev->max_supported = 0; 1053 edev->supported_cable = supported_cable; 1054 1055 return edev; 1056 } 1057 1058 /* 1059 * extcon_dev_free() - Free the memory of extcon device. 1060 * @edev: the extcon device 1061 */ 1062 void extcon_dev_free(struct extcon_dev *edev) 1063 { 1064 kfree(edev); 1065 } 1066 EXPORT_SYMBOL_GPL(extcon_dev_free); 1067 1068 /** 1069 * extcon_dev_register() - Register an new extcon device 1070 * @edev: the extcon device to be registered 1071 * 1072 * Among the members of edev struct, please set the "user initializing data" 1073 * do not set the values of "internal data", which are initialized by 1074 * this function. 1075 * 1076 * Note that before calling this funciton, have to allocate the memory 1077 * of an extcon device by using the extcon_dev_allocate(). And the extcon 1078 * dev should include the supported_cable information. 1079 * 1080 * Returns 0 if success or error number if fail. 1081 */ 1082 int extcon_dev_register(struct extcon_dev *edev) 1083 { 1084 int ret, index = 0; 1085 static atomic_t edev_no = ATOMIC_INIT(-1); 1086 1087 if (!extcon_class) { 1088 ret = create_extcon_class(); 1089 if (ret < 0) 1090 return ret; 1091 } 1092 1093 if (!edev || !edev->supported_cable) 1094 return -EINVAL; 1095 1096 for (; edev->supported_cable[index] != EXTCON_NONE; index++); 1097 1098 edev->max_supported = index; 1099 if (index > SUPPORTED_CABLE_MAX) { 1100 dev_err(&edev->dev, 1101 "exceed the maximum number of supported cables\n"); 1102 return -EINVAL; 1103 } 1104 1105 edev->dev.class = extcon_class; 1106 edev->dev.release = extcon_dev_release; 1107 1108 edev->name = dev_name(edev->dev.parent); 1109 if (IS_ERR_OR_NULL(edev->name)) { 1110 dev_err(&edev->dev, 1111 "extcon device name is null\n"); 1112 return -EINVAL; 1113 } 1114 dev_set_name(&edev->dev, "extcon%lu", 1115 (unsigned long)atomic_inc_return(&edev_no)); 1116 1117 if (edev->max_supported) { 1118 char *str; 1119 struct extcon_cable *cable; 1120 1121 edev->cables = kcalloc(edev->max_supported, 1122 sizeof(struct extcon_cable), 1123 GFP_KERNEL); 1124 if (!edev->cables) { 1125 ret = -ENOMEM; 1126 goto err_sysfs_alloc; 1127 } 1128 for (index = 0; index < edev->max_supported; index++) { 1129 cable = &edev->cables[index]; 1130 1131 str = kasprintf(GFP_KERNEL, "cable.%d", index); 1132 if (!str) { 1133 for (index--; index >= 0; index--) { 1134 cable = &edev->cables[index]; 1135 kfree(cable->attr_g.name); 1136 } 1137 ret = -ENOMEM; 1138 1139 goto err_alloc_cables; 1140 } 1141 1142 cable->edev = edev; 1143 cable->cable_index = index; 1144 cable->attrs[0] = &cable->attr_name.attr; 1145 cable->attrs[1] = &cable->attr_state.attr; 1146 cable->attrs[2] = NULL; 1147 cable->attr_g.name = str; 1148 cable->attr_g.attrs = cable->attrs; 1149 1150 sysfs_attr_init(&cable->attr_name.attr); 1151 cable->attr_name.attr.name = "name"; 1152 cable->attr_name.attr.mode = 0444; 1153 cable->attr_name.show = cable_name_show; 1154 1155 sysfs_attr_init(&cable->attr_state.attr); 1156 cable->attr_state.attr.name = "state"; 1157 cable->attr_state.attr.mode = 0444; 1158 cable->attr_state.show = cable_state_show; 1159 } 1160 } 1161 1162 if (edev->max_supported && edev->mutually_exclusive) { 1163 char *name; 1164 1165 /* Count the size of mutually_exclusive array */ 1166 for (index = 0; edev->mutually_exclusive[index]; index++) 1167 ; 1168 1169 edev->attrs_muex = kcalloc(index + 1, 1170 sizeof(struct attribute *), 1171 GFP_KERNEL); 1172 if (!edev->attrs_muex) { 1173 ret = -ENOMEM; 1174 goto err_muex; 1175 } 1176 1177 edev->d_attrs_muex = kcalloc(index, 1178 sizeof(struct device_attribute), 1179 GFP_KERNEL); 1180 if (!edev->d_attrs_muex) { 1181 ret = -ENOMEM; 1182 kfree(edev->attrs_muex); 1183 goto err_muex; 1184 } 1185 1186 for (index = 0; edev->mutually_exclusive[index]; index++) { 1187 name = kasprintf(GFP_KERNEL, "0x%x", 1188 edev->mutually_exclusive[index]); 1189 if (!name) { 1190 for (index--; index >= 0; index--) { 1191 kfree(edev->d_attrs_muex[index].attr. 1192 name); 1193 } 1194 kfree(edev->d_attrs_muex); 1195 kfree(edev->attrs_muex); 1196 ret = -ENOMEM; 1197 goto err_muex; 1198 } 1199 sysfs_attr_init(&edev->d_attrs_muex[index].attr); 1200 edev->d_attrs_muex[index].attr.name = name; 1201 edev->d_attrs_muex[index].attr.mode = 0000; 1202 edev->attrs_muex[index] = &edev->d_attrs_muex[index] 1203 .attr; 1204 } 1205 edev->attr_g_muex.name = muex_name; 1206 edev->attr_g_muex.attrs = edev->attrs_muex; 1207 1208 } 1209 1210 if (edev->max_supported) { 1211 edev->extcon_dev_type.groups = 1212 kcalloc(edev->max_supported + 2, 1213 sizeof(struct attribute_group *), 1214 GFP_KERNEL); 1215 if (!edev->extcon_dev_type.groups) { 1216 ret = -ENOMEM; 1217 goto err_alloc_groups; 1218 } 1219 1220 edev->extcon_dev_type.name = dev_name(&edev->dev); 1221 edev->extcon_dev_type.release = dummy_sysfs_dev_release; 1222 1223 for (index = 0; index < edev->max_supported; index++) 1224 edev->extcon_dev_type.groups[index] = 1225 &edev->cables[index].attr_g; 1226 if (edev->mutually_exclusive) 1227 edev->extcon_dev_type.groups[index] = 1228 &edev->attr_g_muex; 1229 1230 edev->dev.type = &edev->extcon_dev_type; 1231 } 1232 1233 ret = device_register(&edev->dev); 1234 if (ret) { 1235 put_device(&edev->dev); 1236 goto err_dev; 1237 } 1238 1239 spin_lock_init(&edev->lock); 1240 edev->nh = devm_kcalloc(&edev->dev, edev->max_supported, 1241 sizeof(*edev->nh), GFP_KERNEL); 1242 if (!edev->nh) { 1243 ret = -ENOMEM; 1244 goto err_dev; 1245 } 1246 1247 for (index = 0; index < edev->max_supported; index++) 1248 RAW_INIT_NOTIFIER_HEAD(&edev->nh[index]); 1249 1250 RAW_INIT_NOTIFIER_HEAD(&edev->nh_all); 1251 1252 dev_set_drvdata(&edev->dev, edev); 1253 edev->state = 0; 1254 1255 mutex_lock(&extcon_dev_list_lock); 1256 list_add(&edev->entry, &extcon_dev_list); 1257 mutex_unlock(&extcon_dev_list_lock); 1258 1259 return 0; 1260 1261 err_dev: 1262 if (edev->max_supported) 1263 kfree(edev->extcon_dev_type.groups); 1264 err_alloc_groups: 1265 if (edev->max_supported && edev->mutually_exclusive) { 1266 for (index = 0; edev->mutually_exclusive[index]; index++) 1267 kfree(edev->d_attrs_muex[index].attr.name); 1268 kfree(edev->d_attrs_muex); 1269 kfree(edev->attrs_muex); 1270 } 1271 err_muex: 1272 for (index = 0; index < edev->max_supported; index++) 1273 kfree(edev->cables[index].attr_g.name); 1274 err_alloc_cables: 1275 if (edev->max_supported) 1276 kfree(edev->cables); 1277 err_sysfs_alloc: 1278 return ret; 1279 } 1280 EXPORT_SYMBOL_GPL(extcon_dev_register); 1281 1282 /** 1283 * extcon_dev_unregister() - Unregister the extcon device. 1284 * @edev: the extcon device to be unregistered. 1285 * 1286 * Note that this does not call kfree(edev) because edev was not allocated 1287 * by this class. 1288 */ 1289 void extcon_dev_unregister(struct extcon_dev *edev) 1290 { 1291 int index; 1292 1293 if (!edev) 1294 return; 1295 1296 mutex_lock(&extcon_dev_list_lock); 1297 list_del(&edev->entry); 1298 mutex_unlock(&extcon_dev_list_lock); 1299 1300 if (IS_ERR_OR_NULL(get_device(&edev->dev))) { 1301 dev_err(&edev->dev, "Failed to unregister extcon_dev (%s)\n", 1302 dev_name(&edev->dev)); 1303 return; 1304 } 1305 1306 device_unregister(&edev->dev); 1307 1308 if (edev->mutually_exclusive && edev->max_supported) { 1309 for (index = 0; edev->mutually_exclusive[index]; 1310 index++) 1311 kfree(edev->d_attrs_muex[index].attr.name); 1312 kfree(edev->d_attrs_muex); 1313 kfree(edev->attrs_muex); 1314 } 1315 1316 for (index = 0; index < edev->max_supported; index++) 1317 kfree(edev->cables[index].attr_g.name); 1318 1319 if (edev->max_supported) { 1320 kfree(edev->extcon_dev_type.groups); 1321 kfree(edev->cables); 1322 } 1323 1324 put_device(&edev->dev); 1325 } 1326 EXPORT_SYMBOL_GPL(extcon_dev_unregister); 1327 1328 #ifdef CONFIG_OF 1329 1330 /* 1331 * extcon_find_edev_by_node - Find the extcon device from devicetree. 1332 * @node : OF node identifying edev 1333 * 1334 * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 1335 */ 1336 struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) 1337 { 1338 struct extcon_dev *edev; 1339 1340 mutex_lock(&extcon_dev_list_lock); 1341 list_for_each_entry(edev, &extcon_dev_list, entry) 1342 if (edev->dev.parent && edev->dev.parent->of_node == node) 1343 goto out; 1344 edev = ERR_PTR(-EPROBE_DEFER); 1345 out: 1346 mutex_unlock(&extcon_dev_list_lock); 1347 1348 return edev; 1349 } 1350 1351 /* 1352 * extcon_get_edev_by_phandle - Get the extcon device from devicetree. 1353 * @dev : the instance to the given device 1354 * @index : the index into list of extcon_dev 1355 * 1356 * Return the pointer of extcon device if success or ERR_PTR(err) if fail. 1357 */ 1358 struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) 1359 { 1360 struct device_node *node; 1361 struct extcon_dev *edev; 1362 1363 if (!dev) 1364 return ERR_PTR(-EINVAL); 1365 1366 if (!dev->of_node) { 1367 dev_dbg(dev, "device does not have a device node entry\n"); 1368 return ERR_PTR(-EINVAL); 1369 } 1370 1371 node = of_parse_phandle(dev->of_node, "extcon", index); 1372 if (!node) { 1373 dev_dbg(dev, "failed to get phandle in %pOF node\n", 1374 dev->of_node); 1375 return ERR_PTR(-ENODEV); 1376 } 1377 1378 edev = extcon_find_edev_by_node(node); 1379 of_node_put(node); 1380 1381 return edev; 1382 } 1383 1384 #else 1385 1386 struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) 1387 { 1388 return ERR_PTR(-ENOSYS); 1389 } 1390 1391 struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) 1392 { 1393 return ERR_PTR(-ENOSYS); 1394 } 1395 1396 #endif /* CONFIG_OF */ 1397 1398 EXPORT_SYMBOL_GPL(extcon_find_edev_by_node); 1399 EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle); 1400 1401 /** 1402 * extcon_get_edev_name() - Get the name of the extcon device. 1403 * @edev: the extcon device 1404 */ 1405 const char *extcon_get_edev_name(struct extcon_dev *edev) 1406 { 1407 return !edev ? NULL : edev->name; 1408 } 1409 EXPORT_SYMBOL_GPL(extcon_get_edev_name); 1410 1411 static int __init extcon_class_init(void) 1412 { 1413 return create_extcon_class(); 1414 } 1415 module_init(extcon_class_init); 1416 1417 static void __exit extcon_class_exit(void) 1418 { 1419 class_destroy(extcon_class); 1420 } 1421 module_exit(extcon_class_exit); 1422 1423 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 1424 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); 1425 MODULE_DESCRIPTION("External Connector (extcon) framework"); 1426 MODULE_LICENSE("GPL v2"); 1427