1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2016 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * Copyright (c) 2021-2022 The FreeBSD Foundation 8 * 9 * Portions of this software were developed by Björn Zeeb 10 * under sponsorship from the FreeBSD Foundation. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice unmodified, this list of conditions, and the following 17 * disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 #ifndef _LINUXKPI_LINUX_DEVICE_H_ 34 #define _LINUXKPI_LINUX_DEVICE_H_ 35 36 #include <linux/err.h> 37 #include <linux/types.h> 38 #include <linux/kobject.h> 39 #include <linux/sysfs.h> 40 #include <linux/list.h> 41 #include <linux/compiler.h> 42 #include <linux/module.h> 43 #include <linux/workqueue.h> 44 #include <linux/kdev_t.h> 45 #include <linux/backlight.h> 46 #include <linux/pm.h> 47 #include <linux/idr.h> 48 #include <linux/overflow.h> 49 #include <linux/ratelimit.h> /* via linux/dev_printk.h */ 50 #include <linux/fwnode.h> 51 #include <asm/atomic.h> 52 53 #include <sys/bus.h> 54 #include <sys/backlight.h> 55 56 struct device; 57 58 struct class { 59 const char *name; 60 struct module *owner; 61 struct kobject kobj; 62 devclass_t bsdclass; 63 const struct dev_pm_ops *pm; 64 const struct attribute_group **dev_groups; 65 void (*class_release)(struct class *class); 66 void (*dev_release)(struct device *dev); 67 char * (*devnode)(struct device *dev, umode_t *mode); 68 }; 69 70 struct dev_pm_ops { 71 int (*prepare)(struct device *dev); 72 void (*complete)(struct device *dev); 73 int (*suspend)(struct device *dev); 74 int (*suspend_late)(struct device *dev); 75 int (*resume)(struct device *dev); 76 int (*resume_early)(struct device *dev); 77 int (*freeze)(struct device *dev); 78 int (*freeze_late)(struct device *dev); 79 int (*thaw)(struct device *dev); 80 int (*thaw_early)(struct device *dev); 81 int (*poweroff)(struct device *dev); 82 int (*poweroff_late)(struct device *dev); 83 int (*restore)(struct device *dev); 84 int (*restore_early)(struct device *dev); 85 int (*runtime_suspend)(struct device *dev); 86 int (*runtime_resume)(struct device *dev); 87 int (*runtime_idle)(struct device *dev); 88 }; 89 90 struct device_driver { 91 const char *name; 92 const struct dev_pm_ops *pm; 93 }; 94 95 struct device_type { 96 const char *name; 97 }; 98 99 struct device { 100 struct device *parent; 101 struct list_head irqents; 102 device_t bsddev; 103 /* 104 * The following flag is used to determine if the LinuxKPI is 105 * responsible for detaching the BSD device or not. If the 106 * LinuxKPI got the BSD device using devclass_get_device(), it 107 * must not try to detach or delete it, because it's already 108 * done somewhere else. 109 */ 110 bool bsddev_attached_here; 111 struct device_driver *driver; 112 struct device_type *type; 113 dev_t devt; 114 struct class *class; 115 void (*release)(struct device *dev); 116 struct kobject kobj; 117 void *dma_priv; 118 void *driver_data; 119 unsigned int irq; 120 #define LINUX_IRQ_INVALID 65535 121 unsigned int irq_start; 122 unsigned int irq_end; 123 const struct attribute_group **groups; 124 struct fwnode_handle *fwnode; 125 struct cdev *backlight_dev; 126 struct backlight_device *bd; 127 128 spinlock_t devres_lock; 129 struct list_head devres_head; 130 131 struct dev_pm_info power; 132 }; 133 134 extern struct device linux_root_device; 135 extern struct kobject linux_class_root; 136 extern const struct kobj_type linux_dev_ktype; 137 extern const struct kobj_type linux_class_ktype; 138 139 struct class_attribute { 140 struct attribute attr; 141 ssize_t (*show)(struct class *, struct class_attribute *, char *); 142 ssize_t (*store)(struct class *, struct class_attribute *, const char *, size_t); 143 const void *(*namespace)(struct class *, const struct class_attribute *); 144 }; 145 146 #define CLASS_ATTR(_name, _mode, _show, _store) \ 147 struct class_attribute class_attr_##_name = \ 148 { { #_name, NULL, _mode }, _show, _store } 149 150 struct device_attribute { 151 struct attribute attr; 152 ssize_t (*show)(struct device *, 153 struct device_attribute *, char *); 154 ssize_t (*store)(struct device *, 155 struct device_attribute *, const char *, 156 size_t); 157 }; 158 159 #define DEVICE_ATTR(_name, _mode, _show, _store) \ 160 struct device_attribute dev_attr_##_name = \ 161 __ATTR(_name, _mode, _show, _store) 162 #define DEVICE_ATTR_RO(_name) \ 163 struct device_attribute dev_attr_##_name = __ATTR_RO(_name) 164 #define DEVICE_ATTR_WO(_name) \ 165 struct device_attribute dev_attr_##_name = __ATTR_WO(_name) 166 #define DEVICE_ATTR_RW(_name) \ 167 struct device_attribute dev_attr_##_name = __ATTR_RW(_name) 168 169 /* Simple class attribute that is just a static string */ 170 struct class_attribute_string { 171 struct class_attribute attr; 172 char *str; 173 }; 174 175 static inline ssize_t 176 show_class_attr_string(struct class *class, 177 struct class_attribute *attr, char *buf) 178 { 179 struct class_attribute_string *cs; 180 cs = container_of(attr, struct class_attribute_string, attr); 181 return snprintf(buf, PAGE_SIZE, "%s\n", cs->str); 182 } 183 184 /* Currently read-only only */ 185 #define _CLASS_ATTR_STRING(_name, _mode, _str) \ 186 { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } 187 #define CLASS_ATTR_STRING(_name, _mode, _str) \ 188 struct class_attribute_string class_attr_##_name = \ 189 _CLASS_ATTR_STRING(_name, _mode, _str) 190 191 #define dev_printk(lvl, dev, fmt, ...) \ 192 device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 193 194 #define dev_emerg(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 195 #define dev_alert(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 196 #define dev_crit(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 197 #define dev_err(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 198 #define dev_warn(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 199 #define dev_notice(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 200 #define dev_info(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 201 #define dev_dbg(dev, fmt, ...) do { } while (0) 202 203 #define dev_WARN(dev, fmt, ...) \ 204 device_printf((dev)->bsddev, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__) 205 206 #define dev_WARN_ONCE(dev, condition, fmt, ...) do { \ 207 static bool __dev_WARN_ONCE; \ 208 bool __ret_warn_on = (condition); \ 209 if (unlikely(__ret_warn_on)) { \ 210 if (!__dev_WARN_ONCE) { \ 211 __dev_WARN_ONCE = true; \ 212 device_printf((dev)->bsddev, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__); \ 213 } \ 214 } \ 215 } while (0) 216 217 #define dev_info_once(dev, ...) do { \ 218 static bool __dev_info_once; \ 219 if (!__dev_info_once) { \ 220 __dev_info_once = true; \ 221 dev_info(dev, __VA_ARGS__); \ 222 } \ 223 } while (0) 224 225 #define dev_warn_once(dev, ...) do { \ 226 static bool __dev_warn_once; \ 227 if (!__dev_warn_once) { \ 228 __dev_warn_once = 1; \ 229 dev_warn(dev, __VA_ARGS__); \ 230 } \ 231 } while (0) 232 233 #define dev_err_once(dev, ...) do { \ 234 static bool __dev_err_once; \ 235 if (!__dev_err_once) { \ 236 __dev_err_once = 1; \ 237 dev_err(dev, __VA_ARGS__); \ 238 } \ 239 } while (0) 240 241 #define dev_dbg_once(dev, ...) do { \ 242 static bool __dev_dbg_once; \ 243 if (!__dev_dbg_once) { \ 244 __dev_dbg_once = 1; \ 245 dev_dbg(dev, __VA_ARGS__); \ 246 } \ 247 } while (0) 248 249 #define dev_err_ratelimited(dev, ...) do { \ 250 static linux_ratelimit_t __ratelimited; \ 251 if (linux_ratelimited(&__ratelimited)) \ 252 dev_err(dev, __VA_ARGS__); \ 253 } while (0) 254 255 #define dev_warn_ratelimited(dev, ...) do { \ 256 static linux_ratelimit_t __ratelimited; \ 257 if (linux_ratelimited(&__ratelimited)) \ 258 dev_warn(dev, __VA_ARGS__); \ 259 } while (0) 260 261 #define dev_dbg_ratelimited(dev, ...) do { \ 262 static linux_ratelimit_t __ratelimited; \ 263 if (linux_ratelimited(&__ratelimited)) \ 264 dev_dbg(dev, __VA_ARGS__); \ 265 } while (0) 266 267 /* Public and LinuxKPI internal devres functions. */ 268 void *lkpi_devres_alloc(void(*release)(struct device *, void *), size_t, gfp_t); 269 void lkpi_devres_add(struct device *, void *); 270 void lkpi_devres_free(void *); 271 void *lkpi_devres_find(struct device *, void(*release)(struct device *, void *), 272 int (*match)(struct device *, void *, void *), void *); 273 int lkpi_devres_destroy(struct device *, void(*release)(struct device *, void *), 274 int (*match)(struct device *, void *, void *), void *); 275 #define devres_alloc(_r, _s, _g) lkpi_devres_alloc(_r, _s, _g) 276 #define devres_add(_d, _p) lkpi_devres_add(_d, _p) 277 #define devres_free(_p) lkpi_devres_free(_p) 278 #define devres_find(_d, _rfn, _mfn, _mp) \ 279 lkpi_devres_find(_d, _rfn, _mfn, _mp) 280 #define devres_destroy(_d, _rfn, _mfn, _mp) \ 281 lkpi_devres_destroy(_d, _rfn, _mfn, _mp) 282 void lkpi_devres_release_free_list(struct device *); 283 void lkpi_devres_unlink(struct device *, void *); 284 void lkpi_devm_kmalloc_release(struct device *, void *); 285 #define devm_kfree(_d, _p) lkpi_devm_kmalloc_release(_d, _p) 286 287 static inline const char * 288 dev_driver_string(const struct device *dev) 289 { 290 driver_t *drv; 291 const char *str = ""; 292 293 if (dev->bsddev != NULL) { 294 drv = device_get_driver(dev->bsddev); 295 if (drv != NULL) 296 str = drv->name; 297 } 298 299 return (str); 300 } 301 302 static inline void * 303 dev_get_drvdata(const struct device *dev) 304 { 305 306 return dev->driver_data; 307 } 308 309 static inline void 310 dev_set_drvdata(struct device *dev, void *data) 311 { 312 313 dev->driver_data = data; 314 } 315 316 static inline struct device * 317 get_device(struct device *dev) 318 { 319 320 if (dev) 321 kobject_get(&dev->kobj); 322 323 return (dev); 324 } 325 326 static inline char * 327 dev_name(const struct device *dev) 328 { 329 330 return kobject_name(&dev->kobj); 331 } 332 333 #define dev_set_name(_dev, _fmt, ...) \ 334 kobject_set_name(&(_dev)->kobj, (_fmt), ##__VA_ARGS__) 335 336 static inline void 337 put_device(struct device *dev) 338 { 339 340 if (dev) 341 kobject_put(&dev->kobj); 342 } 343 344 struct class *class_create(struct module *owner, const char *name); 345 #if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION >= 60400 346 #define class_create(name) class_create(NULL, name) 347 #endif 348 349 static inline int 350 class_register(struct class *class) 351 { 352 353 class->bsdclass = devclass_create(class->name); 354 kobject_init(&class->kobj, &linux_class_ktype); 355 kobject_set_name(&class->kobj, class->name); 356 kobject_add(&class->kobj, &linux_class_root, class->name); 357 358 return (0); 359 } 360 361 static inline void 362 class_unregister(struct class *class) 363 { 364 365 kobject_put(&class->kobj); 366 } 367 368 static inline struct device *kobj_to_dev(struct kobject *kobj) 369 { 370 return container_of(kobj, struct device, kobj); 371 } 372 373 struct device *device_create(struct class *class, struct device *parent, 374 dev_t devt, void *drvdata, const char *fmt, ...); 375 struct device *device_create_groups_vargs(struct class *class, struct device *parent, 376 dev_t devt, void *drvdata, const struct attribute_group **groups, 377 const char *fmt, va_list args); 378 379 /* 380 * Devices are registered and created for exporting to sysfs. Create 381 * implies register and register assumes the device fields have been 382 * setup appropriately before being called. 383 */ 384 static inline void 385 device_initialize(struct device *dev) 386 { 387 device_t bsddev = NULL; 388 int unit = -1; 389 390 if (dev->devt) { 391 unit = MINOR(dev->devt); 392 bsddev = devclass_get_device(dev->class->bsdclass, unit); 393 dev->bsddev_attached_here = false; 394 } else if (dev->parent == NULL) { 395 bsddev = devclass_get_device(dev->class->bsdclass, 0); 396 dev->bsddev_attached_here = false; 397 } else { 398 dev->bsddev_attached_here = true; 399 } 400 401 if (bsddev == NULL && dev->parent != NULL) { 402 bsddev = device_add_child(dev->parent->bsddev, 403 dev->class->kobj.name, unit); 404 } 405 406 if (bsddev != NULL) 407 device_set_softc(bsddev, dev); 408 409 dev->bsddev = bsddev; 410 MPASS(dev->bsddev != NULL); 411 kobject_init(&dev->kobj, &linux_dev_ktype); 412 413 spin_lock_init(&dev->devres_lock); 414 INIT_LIST_HEAD(&dev->devres_head); 415 } 416 417 static inline int 418 device_add(struct device *dev) 419 { 420 if (dev->bsddev != NULL) { 421 if (dev->devt == 0) 422 dev->devt = makedev(0, device_get_unit(dev->bsddev)); 423 } 424 kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev)); 425 426 if (dev->groups) 427 return (sysfs_create_groups(&dev->kobj, dev->groups)); 428 429 return (0); 430 } 431 432 static inline void 433 device_create_release(struct device *dev) 434 { 435 kfree(dev); 436 } 437 438 static inline struct device * 439 device_create_with_groups(struct class *class, 440 struct device *parent, dev_t devt, void *drvdata, 441 const struct attribute_group **groups, const char *fmt, ...) 442 { 443 va_list vargs; 444 struct device *dev; 445 446 va_start(vargs, fmt); 447 dev = device_create_groups_vargs(class, parent, devt, drvdata, 448 groups, fmt, vargs); 449 va_end(vargs); 450 return dev; 451 } 452 453 static inline bool 454 device_is_registered(struct device *dev) 455 { 456 457 return (dev->bsddev != NULL); 458 } 459 460 static inline int 461 device_register(struct device *dev) 462 { 463 device_t bsddev = NULL; 464 int unit = -1; 465 466 if (device_is_registered(dev)) 467 goto done; 468 469 if (dev->devt) { 470 unit = MINOR(dev->devt); 471 bsddev = devclass_get_device(dev->class->bsdclass, unit); 472 dev->bsddev_attached_here = false; 473 } else if (dev->parent == NULL) { 474 bsddev = devclass_get_device(dev->class->bsdclass, 0); 475 dev->bsddev_attached_here = false; 476 } else { 477 dev->bsddev_attached_here = true; 478 } 479 if (bsddev == NULL && dev->parent != NULL) { 480 bsddev = device_add_child(dev->parent->bsddev, 481 dev->class->kobj.name, unit); 482 } 483 if (bsddev != NULL) { 484 if (dev->devt == 0) 485 dev->devt = makedev(0, device_get_unit(bsddev)); 486 device_set_softc(bsddev, dev); 487 } 488 dev->bsddev = bsddev; 489 done: 490 kobject_init(&dev->kobj, &linux_dev_ktype); 491 kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev)); 492 493 sysfs_create_groups(&dev->kobj, dev->class->dev_groups); 494 495 return (0); 496 } 497 498 static inline void 499 device_unregister(struct device *dev) 500 { 501 device_t bsddev; 502 503 sysfs_remove_groups(&dev->kobj, dev->class->dev_groups); 504 505 bsddev = dev->bsddev; 506 dev->bsddev = NULL; 507 508 if (bsddev != NULL && dev->bsddev_attached_here) { 509 bus_topo_lock(); 510 device_delete_child(device_get_parent(bsddev), bsddev); 511 bus_topo_unlock(); 512 } 513 put_device(dev); 514 } 515 516 static inline void 517 device_del(struct device *dev) 518 { 519 device_t bsddev; 520 521 bsddev = dev->bsddev; 522 dev->bsddev = NULL; 523 524 if (bsddev != NULL && dev->bsddev_attached_here) { 525 bus_topo_lock(); 526 device_delete_child(device_get_parent(bsddev), bsddev); 527 bus_topo_unlock(); 528 } 529 } 530 531 static inline void 532 device_destroy(struct class *class, dev_t devt) 533 { 534 device_t bsddev; 535 int unit; 536 537 unit = MINOR(devt); 538 bsddev = devclass_get_device(class->bsdclass, unit); 539 if (bsddev != NULL) 540 device_unregister(device_get_softc(bsddev)); 541 } 542 543 static inline void 544 device_release_driver(struct device *dev) 545 { 546 547 #if 0 548 /* This leads to panics. Disable temporarily. Keep to rework. */ 549 550 /* We also need to cleanup LinuxKPI bits. What else? */ 551 lkpi_devres_release_free_list(dev); 552 dev_set_drvdata(dev, NULL); 553 /* Do not call dev->release! */ 554 555 bus_topo_lock(); 556 if (device_is_attached(dev->bsddev)) 557 device_detach(dev->bsddev); 558 bus_topo_unlock(); 559 #endif 560 } 561 562 static inline int 563 device_reprobe(struct device *dev) 564 { 565 int error; 566 567 device_release_driver(dev); 568 bus_topo_lock(); 569 error = device_probe_and_attach(dev->bsddev); 570 bus_topo_unlock(); 571 572 return (-error); 573 } 574 575 static inline void 576 device_set_wakeup_enable(struct device *dev __unused, bool enable __unused) 577 { 578 579 /* 580 * XXX-BZ TODO This is used by wireless drivers supporting WoWLAN which 581 * we currently do not support. 582 */ 583 } 584 585 static inline int 586 device_wakeup_enable(struct device *dev) 587 { 588 589 device_set_wakeup_enable(dev, true); 590 return (0); 591 } 592 593 static inline bool 594 device_iommu_mapped(struct device *dev __unused) 595 { 596 return (false); 597 } 598 599 #define dev_pm_set_driver_flags(dev, flags) do { \ 600 } while (0) 601 602 static inline void 603 linux_class_kfree(struct class *class) 604 { 605 606 kfree(class); 607 } 608 609 static inline void 610 class_destroy(struct class *class) 611 { 612 613 if (class == NULL) 614 return; 615 class_unregister(class); 616 } 617 618 static inline int 619 device_create_file(struct device *dev, const struct device_attribute *attr) 620 { 621 622 if (dev) 623 return sysfs_create_file(&dev->kobj, &attr->attr); 624 return -EINVAL; 625 } 626 627 static inline void 628 device_remove_file(struct device *dev, const struct device_attribute *attr) 629 { 630 631 if (dev) 632 sysfs_remove_file(&dev->kobj, &attr->attr); 633 } 634 635 static inline int 636 class_create_file(struct class *class, const struct class_attribute *attr) 637 { 638 639 if (class) 640 return sysfs_create_file(&class->kobj, &attr->attr); 641 return -EINVAL; 642 } 643 644 static inline void 645 class_remove_file(struct class *class, const struct class_attribute *attr) 646 { 647 648 if (class) 649 sysfs_remove_file(&class->kobj, &attr->attr); 650 } 651 652 #define dev_to_node(dev) linux_dev_to_node(dev) 653 #define of_node_to_nid(node) -1 654 int linux_dev_to_node(struct device *); 655 656 char *kvasprintf(gfp_t, const char *, va_list); 657 char *kasprintf(gfp_t, const char *, ...); 658 char *lkpi_devm_kasprintf(struct device *, gfp_t, const char *, ...); 659 660 #define devm_kasprintf(_dev, _gfp, _fmt, ...) \ 661 lkpi_devm_kasprintf(_dev, _gfp, _fmt, ##__VA_ARGS__) 662 663 static __inline void * 664 devm_kmalloc(struct device *dev, size_t size, gfp_t gfp) 665 { 666 void *p; 667 668 p = lkpi_devres_alloc(lkpi_devm_kmalloc_release, size, gfp); 669 if (p != NULL) 670 lkpi_devres_add(dev, p); 671 672 return (p); 673 } 674 675 static inline void * 676 devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp) 677 { 678 void *dst; 679 680 if (len == 0) 681 return (NULL); 682 683 dst = devm_kmalloc(dev, len, gfp); 684 if (dst != NULL) 685 memcpy(dst, src, len); 686 687 return (dst); 688 } 689 690 #define devm_kzalloc(_dev, _size, _gfp) \ 691 devm_kmalloc((_dev), (_size), (_gfp) | __GFP_ZERO) 692 693 #define devm_kcalloc(_dev, _sizen, _size, _gfp) \ 694 devm_kmalloc((_dev), ((_sizen) * (_size)), (_gfp) | __GFP_ZERO) 695 696 int lkpi_devm_add_action(struct device *dev, void (*action)(void *), void *data); 697 #define devm_add_action(dev, action, data) \ 698 lkpi_devm_add_action(dev, action, data); 699 int lkpi_devm_add_action_or_reset(struct device *dev, void (*action)(void *), void *data); 700 #define devm_add_action_or_reset(dev, action, data) \ 701 lkpi_devm_add_action_or_reset(dev, action, data) 702 703 int lkpi_devm_device_add_group(struct device *dev, const struct attribute_group *group); 704 #define devm_device_add_group(dev, group) \ 705 lkpi_devm_device_add_group(dev, group) 706 707 #endif /* _LINUXKPI_LINUX_DEVICE_H_ */ 708