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1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __LINUX_GPIO_CONSUMER_H 3#define __LINUX_GPIO_CONSUMER_H 4 5#include <linux/bug.h> 6#include <linux/err.h> 7#include <linux/kernel.h> 8 9struct device; 10 11/** 12 * Opaque descriptor for a GPIO. These are obtained using gpiod_get() and are 13 * preferable to the old integer-based handles. 14 * 15 * Contrary to integers, a pointer to a gpio_desc is guaranteed to be valid 16 * until the GPIO is released. 17 */ 18struct gpio_desc; 19 20/** 21 * Opaque descriptor for a structure of GPIO array attributes. This structure 22 * is attached to struct gpiod_descs obtained from gpiod_get_array() and can be 23 * passed back to get/set array functions in order to activate fast processing 24 * path if applicable. 25 */ 26struct gpio_array; 27 28/** 29 * Struct containing an array of descriptors that can be obtained using 30 * gpiod_get_array(). 31 */ 32struct gpio_descs { 33 struct gpio_array *info; 34 unsigned int ndescs; 35 struct gpio_desc *desc[]; 36}; 37 38#define GPIOD_FLAGS_BIT_DIR_SET BIT(0) 39#define GPIOD_FLAGS_BIT_DIR_OUT BIT(1) 40#define GPIOD_FLAGS_BIT_DIR_VAL BIT(2) 41#define GPIOD_FLAGS_BIT_OPEN_DRAIN BIT(3) 42#define GPIOD_FLAGS_BIT_NONEXCLUSIVE BIT(4) 43 44/** 45 * Optional flags that can be passed to one of gpiod_* to configure direction 46 * and output value. These values cannot be OR'd. 47 */ 48enum gpiod_flags { 49 GPIOD_ASIS = 0, 50 GPIOD_IN = GPIOD_FLAGS_BIT_DIR_SET, 51 GPIOD_OUT_LOW = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT, 52 GPIOD_OUT_HIGH = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT | 53 GPIOD_FLAGS_BIT_DIR_VAL, 54 GPIOD_OUT_LOW_OPEN_DRAIN = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_OPEN_DRAIN, 55 GPIOD_OUT_HIGH_OPEN_DRAIN = GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_OPEN_DRAIN, 56}; 57 58#ifdef CONFIG_GPIOLIB 59 60/* Return the number of GPIOs associated with a device / function */ 61int gpiod_count(struct device *dev, const char *con_id); 62 63/* Acquire and dispose GPIOs */ 64struct gpio_desc *__must_check gpiod_get(struct device *dev, 65 const char *con_id, 66 enum gpiod_flags flags); 67struct gpio_desc *__must_check gpiod_get_index(struct device *dev, 68 const char *con_id, 69 unsigned int idx, 70 enum gpiod_flags flags); 71struct gpio_desc *__must_check gpiod_get_optional(struct device *dev, 72 const char *con_id, 73 enum gpiod_flags flags); 74struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev, 75 const char *con_id, 76 unsigned int index, 77 enum gpiod_flags flags); 78struct gpio_descs *__must_check gpiod_get_array(struct device *dev, 79 const char *con_id, 80 enum gpiod_flags flags); 81struct gpio_descs *__must_check gpiod_get_array_optional(struct device *dev, 82 const char *con_id, 83 enum gpiod_flags flags); 84void gpiod_put(struct gpio_desc *desc); 85void gpiod_put_array(struct gpio_descs *descs); 86 87struct gpio_desc *__must_check devm_gpiod_get(struct device *dev, 88 const char *con_id, 89 enum gpiod_flags flags); 90struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev, 91 const char *con_id, 92 unsigned int idx, 93 enum gpiod_flags flags); 94struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev, 95 const char *con_id, 96 enum gpiod_flags flags); 97struct gpio_desc *__must_check 98devm_gpiod_get_index_optional(struct device *dev, const char *con_id, 99 unsigned int index, enum gpiod_flags flags); 100struct gpio_descs *__must_check devm_gpiod_get_array(struct device *dev, 101 const char *con_id, 102 enum gpiod_flags flags); 103struct gpio_descs *__must_check 104devm_gpiod_get_array_optional(struct device *dev, const char *con_id, 105 enum gpiod_flags flags); 106void devm_gpiod_put(struct device *dev, struct gpio_desc *desc); 107void devm_gpiod_unhinge(struct device *dev, struct gpio_desc *desc); 108void devm_gpiod_put_array(struct device *dev, struct gpio_descs *descs); 109 110int gpiod_get_direction(struct gpio_desc *desc); 111int gpiod_direction_input(struct gpio_desc *desc); 112int gpiod_direction_output(struct gpio_desc *desc, int value); 113int gpiod_direction_output_raw(struct gpio_desc *desc, int value); 114 115/* Value get/set from non-sleeping context */ 116int gpiod_get_value(const struct gpio_desc *desc); 117int gpiod_get_array_value(unsigned int array_size, 118 struct gpio_desc **desc_array, 119 struct gpio_array *array_info, 120 unsigned long *value_bitmap); 121void gpiod_set_value(struct gpio_desc *desc, int value); 122int gpiod_set_array_value(unsigned int array_size, 123 struct gpio_desc **desc_array, 124 struct gpio_array *array_info, 125 unsigned long *value_bitmap); 126int gpiod_get_raw_value(const struct gpio_desc *desc); 127int gpiod_get_raw_array_value(unsigned int array_size, 128 struct gpio_desc **desc_array, 129 struct gpio_array *array_info, 130 unsigned long *value_bitmap); 131void gpiod_set_raw_value(struct gpio_desc *desc, int value); 132int gpiod_set_raw_array_value(unsigned int array_size, 133 struct gpio_desc **desc_array, 134 struct gpio_array *array_info, 135 unsigned long *value_bitmap); 136 137/* Value get/set from sleeping context */ 138int gpiod_get_value_cansleep(const struct gpio_desc *desc); 139int gpiod_get_array_value_cansleep(unsigned int array_size, 140 struct gpio_desc **desc_array, 141 struct gpio_array *array_info, 142 unsigned long *value_bitmap); 143void gpiod_set_value_cansleep(struct gpio_desc *desc, int value); 144int gpiod_set_array_value_cansleep(unsigned int array_size, 145 struct gpio_desc **desc_array, 146 struct gpio_array *array_info, 147 unsigned long *value_bitmap); 148int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc); 149int gpiod_get_raw_array_value_cansleep(unsigned int array_size, 150 struct gpio_desc **desc_array, 151 struct gpio_array *array_info, 152 unsigned long *value_bitmap); 153void gpiod_set_raw_value_cansleep(struct gpio_desc *desc, int value); 154int gpiod_set_raw_array_value_cansleep(unsigned int array_size, 155 struct gpio_desc **desc_array, 156 struct gpio_array *array_info, 157 unsigned long *value_bitmap); 158 159int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce); 160int gpiod_set_transitory(struct gpio_desc *desc, bool transitory); 161void gpiod_toggle_active_low(struct gpio_desc *desc); 162 163int gpiod_is_active_low(const struct gpio_desc *desc); 164int gpiod_cansleep(const struct gpio_desc *desc); 165 166int gpiod_to_irq(const struct gpio_desc *desc); 167int gpiod_set_consumer_name(struct gpio_desc *desc, const char *name); 168 169/* Convert between the old gpio_ and new gpiod_ interfaces */ 170struct gpio_desc *gpio_to_desc(unsigned gpio); 171int desc_to_gpio(const struct gpio_desc *desc); 172 173/* Child properties interface */ 174struct fwnode_handle; 175 176struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode, 177 const char *propname, int index, 178 enum gpiod_flags dflags, 179 const char *label); 180struct gpio_desc *fwnode_gpiod_get_index(struct fwnode_handle *fwnode, 181 const char *con_id, int index, 182 enum gpiod_flags flags, 183 const char *label); 184struct gpio_desc *devm_fwnode_gpiod_get_index(struct device *dev, 185 struct fwnode_handle *child, 186 const char *con_id, int index, 187 enum gpiod_flags flags, 188 const char *label); 189 190#else /* CONFIG_GPIOLIB */ 191 192static inline int gpiod_count(struct device *dev, const char *con_id) 193{ 194 return 0; 195} 196 197static inline struct gpio_desc *__must_check gpiod_get(struct device *dev, 198 const char *con_id, 199 enum gpiod_flags flags) 200{ 201 return ERR_PTR(-ENOSYS); 202} 203static inline struct gpio_desc *__must_check 204gpiod_get_index(struct device *dev, 205 const char *con_id, 206 unsigned int idx, 207 enum gpiod_flags flags) 208{ 209 return ERR_PTR(-ENOSYS); 210} 211 212static inline struct gpio_desc *__must_check 213gpiod_get_optional(struct device *dev, const char *con_id, 214 enum gpiod_flags flags) 215{ 216 return NULL; 217} 218 219static inline struct gpio_desc *__must_check 220gpiod_get_index_optional(struct device *dev, const char *con_id, 221 unsigned int index, enum gpiod_flags flags) 222{ 223 return NULL; 224} 225 226static inline struct gpio_descs *__must_check 227gpiod_get_array(struct device *dev, const char *con_id, 228 enum gpiod_flags flags) 229{ 230 return ERR_PTR(-ENOSYS); 231} 232 233static inline struct gpio_descs *__must_check 234gpiod_get_array_optional(struct device *dev, const char *con_id, 235 enum gpiod_flags flags) 236{ 237 return NULL; 238} 239 240static inline void gpiod_put(struct gpio_desc *desc) 241{ 242 might_sleep(); 243 244 /* GPIO can never have been requested */ 245 WARN_ON(desc); 246} 247 248static inline void devm_gpiod_unhinge(struct device *dev, 249 struct gpio_desc *desc) 250{ 251 might_sleep(); 252 253 /* GPIO can never have been requested */ 254 WARN_ON(desc); 255} 256 257static inline void gpiod_put_array(struct gpio_descs *descs) 258{ 259 might_sleep(); 260 261 /* GPIO can never have been requested */ 262 WARN_ON(descs); 263} 264 265static inline struct gpio_desc *__must_check 266devm_gpiod_get(struct device *dev, 267 const char *con_id, 268 enum gpiod_flags flags) 269{ 270 return ERR_PTR(-ENOSYS); 271} 272static inline 273struct gpio_desc *__must_check 274devm_gpiod_get_index(struct device *dev, 275 const char *con_id, 276 unsigned int idx, 277 enum gpiod_flags flags) 278{ 279 return ERR_PTR(-ENOSYS); 280} 281 282static inline struct gpio_desc *__must_check 283devm_gpiod_get_optional(struct device *dev, const char *con_id, 284 enum gpiod_flags flags) 285{ 286 return NULL; 287} 288 289static inline struct gpio_desc *__must_check 290devm_gpiod_get_index_optional(struct device *dev, const char *con_id, 291 unsigned int index, enum gpiod_flags flags) 292{ 293 return NULL; 294} 295 296static inline struct gpio_descs *__must_check 297devm_gpiod_get_array(struct device *dev, const char *con_id, 298 enum gpiod_flags flags) 299{ 300 return ERR_PTR(-ENOSYS); 301} 302 303static inline struct gpio_descs *__must_check 304devm_gpiod_get_array_optional(struct device *dev, const char *con_id, 305 enum gpiod_flags flags) 306{ 307 return NULL; 308} 309 310static inline void devm_gpiod_put(struct device *dev, struct gpio_desc *desc) 311{ 312 might_sleep(); 313 314 /* GPIO can never have been requested */ 315 WARN_ON(desc); 316} 317 318static inline void devm_gpiod_put_array(struct device *dev, 319 struct gpio_descs *descs) 320{ 321 might_sleep(); 322 323 /* GPIO can never have been requested */ 324 WARN_ON(descs); 325} 326 327 328static inline int gpiod_get_direction(const struct gpio_desc *desc) 329{ 330 /* GPIO can never have been requested */ 331 WARN_ON(desc); 332 return -ENOSYS; 333} 334static inline int gpiod_direction_input(struct gpio_desc *desc) 335{ 336 /* GPIO can never have been requested */ 337 WARN_ON(desc); 338 return -ENOSYS; 339} 340static inline int gpiod_direction_output(struct gpio_desc *desc, int value) 341{ 342 /* GPIO can never have been requested */ 343 WARN_ON(desc); 344 return -ENOSYS; 345} 346static inline int gpiod_direction_output_raw(struct gpio_desc *desc, int value) 347{ 348 /* GPIO can never have been requested */ 349 WARN_ON(desc); 350 return -ENOSYS; 351} 352 353 354static inline int gpiod_get_value(const struct gpio_desc *desc) 355{ 356 /* GPIO can never have been requested */ 357 WARN_ON(desc); 358 return 0; 359} 360static inline int gpiod_get_array_value(unsigned int array_size, 361 struct gpio_desc **desc_array, 362 struct gpio_array *array_info, 363 unsigned long *value_bitmap) 364{ 365 /* GPIO can never have been requested */ 366 WARN_ON(desc_array); 367 return 0; 368} 369static inline void gpiod_set_value(struct gpio_desc *desc, int value) 370{ 371 /* GPIO can never have been requested */ 372 WARN_ON(desc); 373} 374static inline int gpiod_set_array_value(unsigned int array_size, 375 struct gpio_desc **desc_array, 376 struct gpio_array *array_info, 377 unsigned long *value_bitmap) 378{ 379 /* GPIO can never have been requested */ 380 WARN_ON(desc_array); 381 return 0; 382} 383static inline int gpiod_get_raw_value(const struct gpio_desc *desc) 384{ 385 /* GPIO can never have been requested */ 386 WARN_ON(desc); 387 return 0; 388} 389static inline int gpiod_get_raw_array_value(unsigned int array_size, 390 struct gpio_desc **desc_array, 391 struct gpio_array *array_info, 392 unsigned long *value_bitmap) 393{ 394 /* GPIO can never have been requested */ 395 WARN_ON(desc_array); 396 return 0; 397} 398static inline void gpiod_set_raw_value(struct gpio_desc *desc, int value) 399{ 400 /* GPIO can never have been requested */ 401 WARN_ON(desc); 402} 403static inline int gpiod_set_raw_array_value(unsigned int array_size, 404 struct gpio_desc **desc_array, 405 struct gpio_array *array_info, 406 unsigned long *value_bitmap) 407{ 408 /* GPIO can never have been requested */ 409 WARN_ON(desc_array); 410 return 0; 411} 412 413static inline int gpiod_get_value_cansleep(const struct gpio_desc *desc) 414{ 415 /* GPIO can never have been requested */ 416 WARN_ON(desc); 417 return 0; 418} 419static inline int gpiod_get_array_value_cansleep(unsigned int array_size, 420 struct gpio_desc **desc_array, 421 struct gpio_array *array_info, 422 unsigned long *value_bitmap) 423{ 424 /* GPIO can never have been requested */ 425 WARN_ON(desc_array); 426 return 0; 427} 428static inline void gpiod_set_value_cansleep(struct gpio_desc *desc, int value) 429{ 430 /* GPIO can never have been requested */ 431 WARN_ON(desc); 432} 433static inline int gpiod_set_array_value_cansleep(unsigned int array_size, 434 struct gpio_desc **desc_array, 435 struct gpio_array *array_info, 436 unsigned long *value_bitmap) 437{ 438 /* GPIO can never have been requested */ 439 WARN_ON(desc_array); 440 return 0; 441} 442static inline int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc) 443{ 444 /* GPIO can never have been requested */ 445 WARN_ON(desc); 446 return 0; 447} 448static inline int gpiod_get_raw_array_value_cansleep(unsigned int array_size, 449 struct gpio_desc **desc_array, 450 struct gpio_array *array_info, 451 unsigned long *value_bitmap) 452{ 453 /* GPIO can never have been requested */ 454 WARN_ON(desc_array); 455 return 0; 456} 457static inline void gpiod_set_raw_value_cansleep(struct gpio_desc *desc, 458 int value) 459{ 460 /* GPIO can never have been requested */ 461 WARN_ON(desc); 462} 463static inline int gpiod_set_raw_array_value_cansleep(unsigned int array_size, 464 struct gpio_desc **desc_array, 465 struct gpio_array *array_info, 466 unsigned long *value_bitmap) 467{ 468 /* GPIO can never have been requested */ 469 WARN_ON(desc_array); 470 return 0; 471} 472 473static inline int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce) 474{ 475 /* GPIO can never have been requested */ 476 WARN_ON(desc); 477 return -ENOSYS; 478} 479 480static inline int gpiod_set_transitory(struct gpio_desc *desc, bool transitory) 481{ 482 /* GPIO can never have been requested */ 483 WARN_ON(desc); 484 return -ENOSYS; 485} 486 487static inline void gpiod_toggle_active_low(struct gpio_desc *desc) 488{ 489 /* GPIO can never have been requested */ 490 WARN_ON(desc); 491} 492 493static inline int gpiod_is_active_low(const struct gpio_desc *desc) 494{ 495 /* GPIO can never have been requested */ 496 WARN_ON(desc); 497 return 0; 498} 499static inline int gpiod_cansleep(const struct gpio_desc *desc) 500{ 501 /* GPIO can never have been requested */ 502 WARN_ON(desc); 503 return 0; 504} 505 506static inline int gpiod_to_irq(const struct gpio_desc *desc) 507{ 508 /* GPIO can never have been requested */ 509 WARN_ON(desc); 510 return -EINVAL; 511} 512 513static inline int gpiod_set_consumer_name(struct gpio_desc *desc, 514 const char *name) 515{ 516 /* GPIO can never have been requested */ 517 WARN_ON(desc); 518 return -EINVAL; 519} 520 521static inline struct gpio_desc *gpio_to_desc(unsigned gpio) 522{ 523 return NULL; 524} 525 526static inline int desc_to_gpio(const struct gpio_desc *desc) 527{ 528 /* GPIO can never have been requested */ 529 WARN_ON(desc); 530 return -EINVAL; 531} 532 533/* Child properties interface */ 534struct fwnode_handle; 535 536static inline 537struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode, 538 const char *propname, int index, 539 enum gpiod_flags dflags, 540 const char *label) 541{ 542 return ERR_PTR(-ENOSYS); 543} 544 545static inline 546struct gpio_desc *fwnode_gpiod_get_index(struct fwnode_handle *fwnode, 547 const char *con_id, int index, 548 enum gpiod_flags flags, 549 const char *label) 550{ 551 return ERR_PTR(-ENOSYS); 552} 553 554static inline 555struct gpio_desc *devm_fwnode_gpiod_get_index(struct device *dev, 556 struct fwnode_handle *fwnode, 557 const char *con_id, int index, 558 enum gpiod_flags flags, 559 const char *label) 560{ 561 return ERR_PTR(-ENOSYS); 562} 563 564#endif /* CONFIG_GPIOLIB */ 565 566static inline 567struct gpio_desc *devm_fwnode_gpiod_get(struct device *dev, 568 struct fwnode_handle *fwnode, 569 const char *con_id, 570 enum gpiod_flags flags, 571 const char *label) 572{ 573 return devm_fwnode_gpiod_get_index(dev, fwnode, con_id, 0, 574 flags, label); 575} 576 577static inline 578struct gpio_desc *devm_fwnode_get_index_gpiod_from_child(struct device *dev, 579 const char *con_id, int index, 580 struct fwnode_handle *child, 581 enum gpiod_flags flags, 582 const char *label) 583{ 584 return devm_fwnode_gpiod_get_index(dev, child, con_id, index, 585 flags, label); 586} 587 588static inline 589struct gpio_desc *devm_fwnode_get_gpiod_from_child(struct device *dev, 590 const char *con_id, 591 struct fwnode_handle *child, 592 enum gpiod_flags flags, 593 const char *label) 594{ 595 return devm_fwnode_gpiod_get_index(dev, child, con_id, 0, flags, label); 596} 597 598#if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_OF_GPIO) 599struct device_node; 600 601struct gpio_desc *gpiod_get_from_of_node(struct device_node *node, 602 const char *propname, int index, 603 enum gpiod_flags dflags, 604 const char *label); 605 606#else /* CONFIG_GPIOLIB && CONFIG_OF_GPIO */ 607 608struct device_node; 609 610static inline 611struct gpio_desc *gpiod_get_from_of_node(struct device_node *node, 612 const char *propname, int index, 613 enum gpiod_flags dflags, 614 const char *label) 615{ 616 return ERR_PTR(-ENOSYS); 617} 618 619#endif /* CONFIG_GPIOLIB && CONFIG_OF_GPIO */ 620 621#ifdef CONFIG_GPIOLIB 622struct device_node; 623 624struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev, 625 struct device_node *node, 626 const char *propname, int index, 627 enum gpiod_flags dflags, 628 const char *label); 629 630#else /* CONFIG_GPIOLIB */ 631 632struct device_node; 633 634static inline 635struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev, 636 struct device_node *node, 637 const char *propname, int index, 638 enum gpiod_flags dflags, 639 const char *label) 640{ 641 return ERR_PTR(-ENOSYS); 642} 643 644#endif /* CONFIG_GPIOLIB */ 645 646struct acpi_gpio_params { 647 unsigned int crs_entry_index; 648 unsigned int line_index; 649 bool active_low; 650}; 651 652struct acpi_gpio_mapping { 653 const char *name; 654 const struct acpi_gpio_params *data; 655 unsigned int size; 656 657/* Ignore IoRestriction field */ 658#define ACPI_GPIO_QUIRK_NO_IO_RESTRICTION BIT(0) 659/* 660 * When ACPI GPIO mapping table is in use the index parameter inside it 661 * refers to the GPIO resource in _CRS method. That index has no 662 * distinction of actual type of the resource. When consumer wants to 663 * get GpioIo type explicitly, this quirk may be used. 664 */ 665#define ACPI_GPIO_QUIRK_ONLY_GPIOIO BIT(1) 666 667 unsigned int quirks; 668}; 669 670#if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_ACPI) 671 672struct acpi_device; 673 674int acpi_dev_add_driver_gpios(struct acpi_device *adev, 675 const struct acpi_gpio_mapping *gpios); 676void acpi_dev_remove_driver_gpios(struct acpi_device *adev); 677 678int devm_acpi_dev_add_driver_gpios(struct device *dev, 679 const struct acpi_gpio_mapping *gpios); 680void devm_acpi_dev_remove_driver_gpios(struct device *dev); 681 682#else /* CONFIG_GPIOLIB && CONFIG_ACPI */ 683 684struct acpi_device; 685 686static inline int acpi_dev_add_driver_gpios(struct acpi_device *adev, 687 const struct acpi_gpio_mapping *gpios) 688{ 689 return -ENXIO; 690} 691static inline void acpi_dev_remove_driver_gpios(struct acpi_device *adev) {} 692 693static inline int devm_acpi_dev_add_driver_gpios(struct device *dev, 694 const struct acpi_gpio_mapping *gpios) 695{ 696 return -ENXIO; 697} 698static inline void devm_acpi_dev_remove_driver_gpios(struct device *dev) {} 699 700#endif /* CONFIG_GPIOLIB && CONFIG_ACPI */ 701 702 703#if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_GPIO_SYSFS) 704 705int gpiod_export(struct gpio_desc *desc, bool direction_may_change); 706int gpiod_export_link(struct device *dev, const char *name, 707 struct gpio_desc *desc); 708void gpiod_unexport(struct gpio_desc *desc); 709 710#else /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */ 711 712static inline int gpiod_export(struct gpio_desc *desc, 713 bool direction_may_change) 714{ 715 return -ENOSYS; 716} 717 718static inline int gpiod_export_link(struct device *dev, const char *name, 719 struct gpio_desc *desc) 720{ 721 return -ENOSYS; 722} 723 724static inline void gpiod_unexport(struct gpio_desc *desc) 725{ 726} 727 728#endif /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */ 729 730#endif