1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * pm_runtime.h - Device run-time power management helper functions. 4 * 5 * Copyright (C) 2009 Rafael J. Wysocki <[email protected]> 6 */ 7 8 #ifndef _LINUX_PM_RUNTIME_H 9 #define _LINUX_PM_RUNTIME_H 10 11 #include <linux/device.h> 12 #include <linux/notifier.h> 13 #include <linux/pm.h> 14 15 #include <linux/jiffies.h> 16 17 /* Runtime PM flag argument bits */ 18 #define RPM_ASYNC 0x01 /* Request is asynchronous */ 19 #define RPM_NOWAIT 0x02 /* Don't wait for concurrent 20 state change */ 21 #define RPM_GET_PUT 0x04 /* Increment/decrement the 22 usage_count */ 23 #define RPM_AUTO 0x08 /* Use autosuspend_delay */ 24 25 /* 26 * Use this for defining a set of PM operations to be used in all situations 27 * (system suspend, hibernation or runtime PM). 28 * 29 * Note that the behaviour differs from the deprecated UNIVERSAL_DEV_PM_OPS() 30 * macro, which uses the provided callbacks for both runtime PM and system 31 * sleep, while DEFINE_RUNTIME_DEV_PM_OPS() uses pm_runtime_force_suspend() 32 * and pm_runtime_force_resume() for its system sleep callbacks. 33 * 34 * If the underlying dev_pm_ops struct symbol has to be exported, use 35 * EXPORT_RUNTIME_DEV_PM_OPS() or EXPORT_GPL_RUNTIME_DEV_PM_OPS() instead. 36 */ 37 #define DEFINE_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \ 38 _DEFINE_DEV_PM_OPS(name, pm_runtime_force_suspend, \ 39 pm_runtime_force_resume, suspend_fn, \ 40 resume_fn, idle_fn) 41 42 #define EXPORT_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \ 43 EXPORT_DEV_PM_OPS(name) = { \ 44 RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \ 45 } 46 #define EXPORT_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn) \ 47 EXPORT_GPL_DEV_PM_OPS(name) = { \ 48 RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \ 49 } 50 #define EXPORT_NS_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn, ns) \ 51 EXPORT_NS_DEV_PM_OPS(name, ns) = { \ 52 RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \ 53 } 54 #define EXPORT_NS_GPL_RUNTIME_DEV_PM_OPS(name, suspend_fn, resume_fn, idle_fn, ns) \ 55 EXPORT_NS_GPL_DEV_PM_OPS(name, ns) = { \ 56 RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \ 57 } 58 59 #ifdef CONFIG_PM 60 extern struct workqueue_struct *pm_wq; 61 62 static inline bool queue_pm_work(struct work_struct *work) 63 { 64 return queue_work(pm_wq, work); 65 } 66 67 extern int pm_generic_runtime_suspend(struct device *dev); 68 extern int pm_generic_runtime_resume(struct device *dev); 69 extern bool pm_runtime_need_not_resume(struct device *dev); 70 extern int pm_runtime_force_suspend(struct device *dev); 71 extern int pm_runtime_force_resume(struct device *dev); 72 73 extern int __pm_runtime_idle(struct device *dev, int rpmflags); 74 extern int __pm_runtime_suspend(struct device *dev, int rpmflags); 75 extern int __pm_runtime_resume(struct device *dev, int rpmflags); 76 extern int pm_runtime_get_if_active(struct device *dev); 77 extern int pm_runtime_get_if_in_use(struct device *dev); 78 extern int pm_schedule_suspend(struct device *dev, unsigned int delay); 79 extern int __pm_runtime_set_status(struct device *dev, unsigned int status); 80 extern int pm_runtime_barrier(struct device *dev); 81 extern bool pm_runtime_block_if_disabled(struct device *dev); 82 extern void pm_runtime_unblock(struct device *dev); 83 extern void pm_runtime_enable(struct device *dev); 84 extern void __pm_runtime_disable(struct device *dev, bool check_resume); 85 extern void pm_runtime_allow(struct device *dev); 86 extern void pm_runtime_forbid(struct device *dev); 87 extern void pm_runtime_no_callbacks(struct device *dev); 88 extern void pm_runtime_irq_safe(struct device *dev); 89 extern void __pm_runtime_use_autosuspend(struct device *dev, bool use); 90 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay); 91 extern u64 pm_runtime_autosuspend_expiration(struct device *dev); 92 extern void pm_runtime_set_memalloc_noio(struct device *dev, bool enable); 93 extern void pm_runtime_get_suppliers(struct device *dev); 94 extern void pm_runtime_put_suppliers(struct device *dev); 95 extern void pm_runtime_new_link(struct device *dev); 96 extern void pm_runtime_drop_link(struct device_link *link); 97 extern void pm_runtime_release_supplier(struct device_link *link); 98 99 extern int devm_pm_runtime_enable(struct device *dev); 100 101 /** 102 * pm_suspend_ignore_children - Set runtime PM behavior regarding children. 103 * @dev: Target device. 104 * @enable: Whether or not to ignore possible dependencies on children. 105 * 106 * The dependencies of @dev on its children will not be taken into account by 107 * the runtime PM framework going forward if @enable is %true, or they will 108 * be taken into account otherwise. 109 */ 110 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) 111 { 112 dev->power.ignore_children = enable; 113 } 114 115 /** 116 * pm_runtime_get_noresume - Bump up runtime PM usage counter of a device. 117 * @dev: Target device. 118 */ 119 static inline void pm_runtime_get_noresume(struct device *dev) 120 { 121 atomic_inc(&dev->power.usage_count); 122 } 123 124 /** 125 * pm_runtime_put_noidle - Drop runtime PM usage counter of a device. 126 * @dev: Target device. 127 * 128 * Decrement the runtime PM usage counter of @dev unless it is 0 already. 129 */ 130 static inline void pm_runtime_put_noidle(struct device *dev) 131 { 132 atomic_add_unless(&dev->power.usage_count, -1, 0); 133 } 134 135 /** 136 * pm_runtime_suspended - Check whether or not a device is runtime-suspended. 137 * @dev: Target device. 138 * 139 * Return %true if runtime PM is enabled for @dev and its runtime PM status is 140 * %RPM_SUSPENDED, or %false otherwise. 141 * 142 * Note that the return value of this function can only be trusted if it is 143 * called under the runtime PM lock of @dev or under conditions in which 144 * runtime PM cannot be either disabled or enabled for @dev and its runtime PM 145 * status cannot change. 146 */ 147 static inline bool pm_runtime_suspended(struct device *dev) 148 { 149 return dev->power.runtime_status == RPM_SUSPENDED 150 && !dev->power.disable_depth; 151 } 152 153 /** 154 * pm_runtime_active - Check whether or not a device is runtime-active. 155 * @dev: Target device. 156 * 157 * Return %true if runtime PM is disabled for @dev or its runtime PM status is 158 * %RPM_ACTIVE, or %false otherwise. 159 * 160 * Note that the return value of this function can only be trusted if it is 161 * called under the runtime PM lock of @dev or under conditions in which 162 * runtime PM cannot be either disabled or enabled for @dev and its runtime PM 163 * status cannot change. 164 */ 165 static inline bool pm_runtime_active(struct device *dev) 166 { 167 return dev->power.runtime_status == RPM_ACTIVE 168 || dev->power.disable_depth; 169 } 170 171 /** 172 * pm_runtime_status_suspended - Check if runtime PM status is "suspended". 173 * @dev: Target device. 174 * 175 * Return %true if the runtime PM status of @dev is %RPM_SUSPENDED, or %false 176 * otherwise, regardless of whether or not runtime PM has been enabled for @dev. 177 * 178 * Note that the return value of this function can only be trusted if it is 179 * called under the runtime PM lock of @dev or under conditions in which the 180 * runtime PM status of @dev cannot change. 181 */ 182 static inline bool pm_runtime_status_suspended(struct device *dev) 183 { 184 return dev->power.runtime_status == RPM_SUSPENDED; 185 } 186 187 /** 188 * pm_runtime_enabled - Check if runtime PM is enabled. 189 * @dev: Target device. 190 * 191 * Return %true if runtime PM is enabled for @dev or %false otherwise. 192 * 193 * Note that the return value of this function can only be trusted if it is 194 * called under the runtime PM lock of @dev or under conditions in which 195 * runtime PM cannot be either disabled or enabled for @dev. 196 */ 197 static inline bool pm_runtime_enabled(struct device *dev) 198 { 199 return !dev->power.disable_depth; 200 } 201 202 /** 203 * pm_runtime_blocked - Check if runtime PM enabling is blocked. 204 * @dev: Target device. 205 * 206 * Do not call this function outside system suspend/resume code paths. 207 */ 208 static inline bool pm_runtime_blocked(struct device *dev) 209 { 210 return dev->power.last_status == RPM_BLOCKED; 211 } 212 213 /** 214 * pm_runtime_has_no_callbacks - Check if runtime PM callbacks may be present. 215 * @dev: Target device. 216 * 217 * Return %true if @dev is a special device without runtime PM callbacks or 218 * %false otherwise. 219 */ 220 static inline bool pm_runtime_has_no_callbacks(struct device *dev) 221 { 222 return dev->power.no_callbacks; 223 } 224 225 /** 226 * pm_runtime_mark_last_busy - Update the last access time of a device. 227 * @dev: Target device. 228 * 229 * Update the last access time of @dev used by the runtime PM autosuspend 230 * mechanism to the current time as returned by ktime_get_mono_fast_ns(). 231 */ 232 static inline void pm_runtime_mark_last_busy(struct device *dev) 233 { 234 WRITE_ONCE(dev->power.last_busy, ktime_get_mono_fast_ns()); 235 } 236 237 /** 238 * pm_runtime_is_irq_safe - Check if runtime PM can work in interrupt context. 239 * @dev: Target device. 240 * 241 * Return %true if @dev has been marked as an "IRQ-safe" device (with respect 242 * to runtime PM), in which case its runtime PM callabcks can be expected to 243 * work correctly when invoked from interrupt handlers. 244 */ 245 static inline bool pm_runtime_is_irq_safe(struct device *dev) 246 { 247 return dev->power.irq_safe; 248 } 249 250 extern u64 pm_runtime_suspended_time(struct device *dev); 251 252 #else /* !CONFIG_PM */ 253 254 static inline bool queue_pm_work(struct work_struct *work) { return false; } 255 256 static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } 257 static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } 258 static inline bool pm_runtime_need_not_resume(struct device *dev) {return true; } 259 static inline int pm_runtime_force_suspend(struct device *dev) { return 0; } 260 static inline int pm_runtime_force_resume(struct device *dev) { return 0; } 261 262 static inline int __pm_runtime_idle(struct device *dev, int rpmflags) 263 { 264 return -ENOSYS; 265 } 266 static inline int __pm_runtime_suspend(struct device *dev, int rpmflags) 267 { 268 return -ENOSYS; 269 } 270 static inline int __pm_runtime_resume(struct device *dev, int rpmflags) 271 { 272 return 1; 273 } 274 static inline int pm_schedule_suspend(struct device *dev, unsigned int delay) 275 { 276 return -ENOSYS; 277 } 278 static inline int pm_runtime_get_if_in_use(struct device *dev) 279 { 280 return -EINVAL; 281 } 282 static inline int pm_runtime_get_if_active(struct device *dev) 283 { 284 return -EINVAL; 285 } 286 static inline int __pm_runtime_set_status(struct device *dev, 287 unsigned int status) { return 0; } 288 static inline int pm_runtime_barrier(struct device *dev) { return 0; } 289 static inline bool pm_runtime_block_if_disabled(struct device *dev) { return true; } 290 static inline void pm_runtime_unblock(struct device *dev) {} 291 static inline void pm_runtime_enable(struct device *dev) {} 292 static inline void __pm_runtime_disable(struct device *dev, bool c) {} 293 static inline bool pm_runtime_blocked(struct device *dev) { return true; } 294 static inline void pm_runtime_allow(struct device *dev) {} 295 static inline void pm_runtime_forbid(struct device *dev) {} 296 297 static inline int devm_pm_runtime_enable(struct device *dev) { return 0; } 298 299 static inline void pm_suspend_ignore_children(struct device *dev, bool enable) {} 300 static inline void pm_runtime_get_noresume(struct device *dev) {} 301 static inline void pm_runtime_put_noidle(struct device *dev) {} 302 static inline bool pm_runtime_suspended(struct device *dev) { return false; } 303 static inline bool pm_runtime_active(struct device *dev) { return true; } 304 static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } 305 static inline bool pm_runtime_enabled(struct device *dev) { return false; } 306 307 static inline void pm_runtime_no_callbacks(struct device *dev) {} 308 static inline void pm_runtime_irq_safe(struct device *dev) {} 309 static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; } 310 311 static inline bool pm_runtime_has_no_callbacks(struct device *dev) { return false; } 312 static inline void pm_runtime_mark_last_busy(struct device *dev) {} 313 static inline void __pm_runtime_use_autosuspend(struct device *dev, 314 bool use) {} 315 static inline void pm_runtime_set_autosuspend_delay(struct device *dev, 316 int delay) {} 317 static inline u64 pm_runtime_autosuspend_expiration( 318 struct device *dev) { return 0; } 319 static inline void pm_runtime_set_memalloc_noio(struct device *dev, 320 bool enable){} 321 static inline void pm_runtime_get_suppliers(struct device *dev) {} 322 static inline void pm_runtime_put_suppliers(struct device *dev) {} 323 static inline void pm_runtime_new_link(struct device *dev) {} 324 static inline void pm_runtime_drop_link(struct device_link *link) {} 325 static inline void pm_runtime_release_supplier(struct device_link *link) {} 326 327 #endif /* !CONFIG_PM */ 328 329 /** 330 * pm_runtime_idle - Conditionally set up autosuspend of a device or suspend it. 331 * @dev: Target device. 332 * 333 * Invoke the "idle check" callback of @dev and, depending on its return value, 334 * set up autosuspend of @dev or suspend it (depending on whether or not 335 * autosuspend has been enabled for it). 336 */ 337 static inline int pm_runtime_idle(struct device *dev) 338 { 339 return __pm_runtime_idle(dev, 0); 340 } 341 342 /** 343 * pm_runtime_suspend - Suspend a device synchronously. 344 * @dev: Target device. 345 */ 346 static inline int pm_runtime_suspend(struct device *dev) 347 { 348 return __pm_runtime_suspend(dev, 0); 349 } 350 351 /** 352 * pm_runtime_autosuspend - Set up autosuspend of a device or suspend it. 353 * @dev: Target device. 354 * 355 * Set up autosuspend of @dev or suspend it (depending on whether or not 356 * autosuspend is enabled for it) without engaging its "idle check" callback. 357 */ 358 static inline int pm_runtime_autosuspend(struct device *dev) 359 { 360 return __pm_runtime_suspend(dev, RPM_AUTO); 361 } 362 363 /** 364 * pm_runtime_resume - Resume a device synchronously. 365 * @dev: Target device. 366 */ 367 static inline int pm_runtime_resume(struct device *dev) 368 { 369 return __pm_runtime_resume(dev, 0); 370 } 371 372 /** 373 * pm_request_idle - Queue up "idle check" execution for a device. 374 * @dev: Target device. 375 * 376 * Queue up a work item to run an equivalent of pm_runtime_idle() for @dev 377 * asynchronously. 378 */ 379 static inline int pm_request_idle(struct device *dev) 380 { 381 return __pm_runtime_idle(dev, RPM_ASYNC); 382 } 383 384 /** 385 * pm_request_resume - Queue up runtime-resume of a device. 386 * @dev: Target device. 387 */ 388 static inline int pm_request_resume(struct device *dev) 389 { 390 return __pm_runtime_resume(dev, RPM_ASYNC); 391 } 392 393 /** 394 * pm_request_autosuspend - Queue up autosuspend of a device. 395 * @dev: Target device. 396 * 397 * Queue up a work item to run an equivalent pm_runtime_autosuspend() for @dev 398 * asynchronously. 399 */ 400 static inline int pm_request_autosuspend(struct device *dev) 401 { 402 return __pm_runtime_suspend(dev, RPM_ASYNC | RPM_AUTO); 403 } 404 405 /** 406 * pm_runtime_get - Bump up usage counter and queue up resume of a device. 407 * @dev: Target device. 408 * 409 * Bump up the runtime PM usage counter of @dev and queue up a work item to 410 * carry out runtime-resume of it. 411 */ 412 static inline int pm_runtime_get(struct device *dev) 413 { 414 return __pm_runtime_resume(dev, RPM_GET_PUT | RPM_ASYNC); 415 } 416 417 /** 418 * pm_runtime_get_sync - Bump up usage counter of a device and resume it. 419 * @dev: Target device. 420 * 421 * Bump up the runtime PM usage counter of @dev and carry out runtime-resume of 422 * it synchronously. 423 * 424 * The possible return values of this function are the same as for 425 * pm_runtime_resume() and the runtime PM usage counter of @dev remains 426 * incremented in all cases, even if it returns an error code. 427 * Consider using pm_runtime_resume_and_get() instead of it, especially 428 * if its return value is checked by the caller, as this is likely to result 429 * in cleaner code. 430 */ 431 static inline int pm_runtime_get_sync(struct device *dev) 432 { 433 return __pm_runtime_resume(dev, RPM_GET_PUT); 434 } 435 436 /** 437 * pm_runtime_resume_and_get - Bump up usage counter of a device and resume it. 438 * @dev: Target device. 439 * 440 * Resume @dev synchronously and if that is successful, increment its runtime 441 * PM usage counter. Return 0 if the runtime PM usage counter of @dev has been 442 * incremented or a negative error code otherwise. 443 */ 444 static inline int pm_runtime_resume_and_get(struct device *dev) 445 { 446 int ret; 447 448 ret = __pm_runtime_resume(dev, RPM_GET_PUT); 449 if (ret < 0) { 450 pm_runtime_put_noidle(dev); 451 return ret; 452 } 453 454 return 0; 455 } 456 457 /** 458 * pm_runtime_put - Drop device usage counter and queue up "idle check" if 0. 459 * @dev: Target device. 460 * 461 * Decrement the runtime PM usage counter of @dev and if it turns out to be 462 * equal to 0, queue up a work item for @dev like in pm_request_idle(). 463 */ 464 static inline int pm_runtime_put(struct device *dev) 465 { 466 return __pm_runtime_idle(dev, RPM_GET_PUT | RPM_ASYNC); 467 } 468 469 /** 470 * __pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0. 471 * @dev: Target device. 472 * 473 * Decrement the runtime PM usage counter of @dev and if it turns out to be 474 * equal to 0, queue up a work item for @dev like in pm_request_autosuspend(). 475 */ 476 static inline int __pm_runtime_put_autosuspend(struct device *dev) 477 { 478 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 479 } 480 481 /** 482 * pm_runtime_put_autosuspend - Drop device usage counter and queue autosuspend if 0. 483 * @dev: Target device. 484 * 485 * Decrement the runtime PM usage counter of @dev and if it turns out to be 486 * equal to 0, queue up a work item for @dev like in pm_request_autosuspend(). 487 */ 488 static inline int pm_runtime_put_autosuspend(struct device *dev) 489 { 490 return __pm_runtime_suspend(dev, 491 RPM_GET_PUT | RPM_ASYNC | RPM_AUTO); 492 } 493 494 /** 495 * pm_runtime_put_sync - Drop device usage counter and run "idle check" if 0. 496 * @dev: Target device. 497 * 498 * Decrement the runtime PM usage counter of @dev and if it turns out to be 499 * equal to 0, invoke the "idle check" callback of @dev and, depending on its 500 * return value, set up autosuspend of @dev or suspend it (depending on whether 501 * or not autosuspend has been enabled for it). 502 * 503 * The possible return values of this function are the same as for 504 * pm_runtime_idle() and the runtime PM usage counter of @dev remains 505 * decremented in all cases, even if it returns an error code. 506 */ 507 static inline int pm_runtime_put_sync(struct device *dev) 508 { 509 return __pm_runtime_idle(dev, RPM_GET_PUT); 510 } 511 512 /** 513 * pm_runtime_put_sync_suspend - Drop device usage counter and suspend if 0. 514 * @dev: Target device. 515 * 516 * Decrement the runtime PM usage counter of @dev and if it turns out to be 517 * equal to 0, carry out runtime-suspend of @dev synchronously. 518 * 519 * The possible return values of this function are the same as for 520 * pm_runtime_suspend() and the runtime PM usage counter of @dev remains 521 * decremented in all cases, even if it returns an error code. 522 */ 523 static inline int pm_runtime_put_sync_suspend(struct device *dev) 524 { 525 return __pm_runtime_suspend(dev, RPM_GET_PUT); 526 } 527 528 /** 529 * pm_runtime_put_sync_autosuspend - Drop device usage counter and autosuspend if 0. 530 * @dev: Target device. 531 * 532 * Decrement the runtime PM usage counter of @dev and if it turns out to be 533 * equal to 0, set up autosuspend of @dev or suspend it synchronously (depending 534 * on whether or not autosuspend has been enabled for it). 535 * 536 * The possible return values of this function are the same as for 537 * pm_runtime_autosuspend() and the runtime PM usage counter of @dev remains 538 * decremented in all cases, even if it returns an error code. 539 */ 540 static inline int pm_runtime_put_sync_autosuspend(struct device *dev) 541 { 542 return __pm_runtime_suspend(dev, RPM_GET_PUT | RPM_AUTO); 543 } 544 545 /** 546 * pm_runtime_set_active - Set runtime PM status to "active". 547 * @dev: Target device. 548 * 549 * Set the runtime PM status of @dev to %RPM_ACTIVE and ensure that dependencies 550 * of it will be taken into account. 551 * 552 * It is not valid to call this function for devices with runtime PM enabled. 553 */ 554 static inline int pm_runtime_set_active(struct device *dev) 555 { 556 return __pm_runtime_set_status(dev, RPM_ACTIVE); 557 } 558 559 /** 560 * pm_runtime_set_suspended - Set runtime PM status to "suspended". 561 * @dev: Target device. 562 * 563 * Set the runtime PM status of @dev to %RPM_SUSPENDED and ensure that 564 * dependencies of it will be taken into account. 565 * 566 * It is not valid to call this function for devices with runtime PM enabled. 567 */ 568 static inline int pm_runtime_set_suspended(struct device *dev) 569 { 570 return __pm_runtime_set_status(dev, RPM_SUSPENDED); 571 } 572 573 /** 574 * pm_runtime_disable - Disable runtime PM for a device. 575 * @dev: Target device. 576 * 577 * Prevent the runtime PM framework from working with @dev by incrementing its 578 * "disable" counter. 579 * 580 * If the counter is zero when this function runs and there is a pending runtime 581 * resume request for @dev, it will be resumed. If the counter is still zero at 582 * that point, all of the pending runtime PM requests for @dev will be canceled 583 * and all runtime PM operations in progress involving it will be waited for to 584 * complete. 585 * 586 * For each invocation of this function for @dev, there must be a matching 587 * pm_runtime_enable() call, so that runtime PM is eventually enabled for it 588 * again. 589 */ 590 static inline void pm_runtime_disable(struct device *dev) 591 { 592 __pm_runtime_disable(dev, true); 593 } 594 595 /** 596 * pm_runtime_use_autosuspend - Allow autosuspend to be used for a device. 597 * @dev: Target device. 598 * 599 * Allow the runtime PM autosuspend mechanism to be used for @dev whenever 600 * requested (or "autosuspend" will be handled as direct runtime-suspend for 601 * it). 602 * 603 * NOTE: It's important to undo this with pm_runtime_dont_use_autosuspend() 604 * at driver exit time unless your driver initially enabled pm_runtime 605 * with devm_pm_runtime_enable() (which handles it for you). 606 */ 607 static inline void pm_runtime_use_autosuspend(struct device *dev) 608 { 609 __pm_runtime_use_autosuspend(dev, true); 610 } 611 612 /** 613 * pm_runtime_dont_use_autosuspend - Prevent autosuspend from being used. 614 * @dev: Target device. 615 * 616 * Prevent the runtime PM autosuspend mechanism from being used for @dev which 617 * means that "autosuspend" will be handled as direct runtime-suspend for it 618 * going forward. 619 */ 620 static inline void pm_runtime_dont_use_autosuspend(struct device *dev) 621 { 622 __pm_runtime_use_autosuspend(dev, false); 623 } 624 625 #endif 626