1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Driver model for leds and led triggers 4 * 5 * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu> 6 * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com> 7 */ 8 #ifndef __LINUX_LEDS_H_INCLUDED 9 #define __LINUX_LEDS_H_INCLUDED 10 11 #include <dt-bindings/leds/common.h> 12 #include <linux/device.h> 13 #include <linux/mutex.h> 14 #include <linux/rwsem.h> 15 #include <linux/spinlock.h> 16 #include <linux/timer.h> 17 #include <linux/types.h> 18 #include <linux/workqueue.h> 19 20 struct attribute_group; 21 struct device_node; 22 struct fwnode_handle; 23 struct gpio_desc; 24 struct kernfs_node; 25 struct led_pattern; 26 struct platform_device; 27 28 /* 29 * LED Core 30 */ 31 32 /* This is obsolete/useless. We now support variable maximum brightness. */ 33 enum led_brightness { 34 LED_OFF = 0, 35 LED_ON = 1, 36 LED_HALF = 127, 37 LED_FULL = 255, 38 }; 39 40 enum led_default_state { 41 LEDS_DEFSTATE_OFF = 0, 42 LEDS_DEFSTATE_ON = 1, 43 LEDS_DEFSTATE_KEEP = 2, 44 }; 45 46 /** 47 * struct led_lookup_data - represents a single LED lookup entry 48 * 49 * @list: internal list of all LED lookup entries 50 * @provider: name of led_classdev providing the LED 51 * @dev_id: name of the device associated with this LED 52 * @con_id: name of the LED from the device's point of view 53 */ 54 struct led_lookup_data { 55 struct list_head list; 56 const char *provider; 57 const char *dev_id; 58 const char *con_id; 59 }; 60 61 struct led_init_data { 62 /* device fwnode handle */ 63 struct fwnode_handle *fwnode; 64 /* 65 * default <color:function> tuple, for backward compatibility 66 * with in-driver hard-coded LED names used as a fallback when 67 * DT "label" property is absent; it should be set to NULL 68 * in new LED class drivers. 69 */ 70 const char *default_label; 71 /* 72 * string to be used for devicename section of LED class device 73 * either for label based LED name composition path or for fwnode 74 * based when devname_mandatory is true 75 */ 76 const char *devicename; 77 /* 78 * indicates if LED name should always comprise devicename section; 79 * only LEDs exposed by drivers of hot-pluggable devices should 80 * set it to true 81 */ 82 bool devname_mandatory; 83 }; 84 85 #if IS_ENABLED(CONFIG_NEW_LEDS) 86 enum led_default_state led_init_default_state_get(struct fwnode_handle *fwnode); 87 #else 88 static inline enum led_default_state 89 led_init_default_state_get(struct fwnode_handle *fwnode) 90 { 91 return LEDS_DEFSTATE_OFF; 92 } 93 #endif 94 95 struct led_hw_trigger_type { 96 int dummy; 97 }; 98 99 struct led_classdev { 100 const char *name; 101 unsigned int brightness; 102 unsigned int max_brightness; 103 unsigned int color; 104 int flags; 105 106 /* Lower 16 bits reflect status */ 107 #define LED_SUSPENDED BIT(0) 108 #define LED_UNREGISTERING BIT(1) 109 /* Upper 16 bits reflect control information */ 110 #define LED_CORE_SUSPENDRESUME BIT(16) 111 #define LED_SYSFS_DISABLE BIT(17) 112 #define LED_DEV_CAP_FLASH BIT(18) 113 #define LED_HW_PLUGGABLE BIT(19) 114 #define LED_PANIC_INDICATOR BIT(20) 115 #define LED_BRIGHT_HW_CHANGED BIT(21) 116 #define LED_RETAIN_AT_SHUTDOWN BIT(22) 117 #define LED_INIT_DEFAULT_TRIGGER BIT(23) 118 119 /* set_brightness_work / blink_timer flags, atomic, private. */ 120 unsigned long work_flags; 121 122 #define LED_BLINK_SW 0 123 #define LED_BLINK_ONESHOT 1 124 #define LED_BLINK_ONESHOT_STOP 2 125 #define LED_BLINK_INVERT 3 126 #define LED_BLINK_BRIGHTNESS_CHANGE 4 127 #define LED_BLINK_DISABLE 5 128 /* Brightness off also disables hw-blinking so it is a separate action */ 129 #define LED_SET_BRIGHTNESS_OFF 6 130 #define LED_SET_BRIGHTNESS 7 131 #define LED_SET_BLINK 8 132 133 /* Set LED brightness level 134 * Must not sleep. Use brightness_set_blocking for drivers 135 * that can sleep while setting brightness. 136 */ 137 void (*brightness_set)(struct led_classdev *led_cdev, 138 enum led_brightness brightness); 139 /* 140 * Set LED brightness level immediately - it can block the caller for 141 * the time required for accessing a LED device register. 142 */ 143 int (*brightness_set_blocking)(struct led_classdev *led_cdev, 144 enum led_brightness brightness); 145 /* Get LED brightness level */ 146 enum led_brightness (*brightness_get)(struct led_classdev *led_cdev); 147 148 /* 149 * Activate hardware accelerated blink, delays are in milliseconds 150 * and if both are zero then a sensible default should be chosen. 151 * The call should adjust the timings in that case and if it can't 152 * match the values specified exactly. 153 * Deactivate blinking again when the brightness is set to LED_OFF 154 * via the brightness_set() callback. 155 * For led_blink_set_nosleep() the LED core assumes that blink_set 156 * implementations, of drivers which do not use brightness_set_blocking, 157 * will not sleep. Therefor if brightness_set_blocking is not set 158 * this function must not sleep! 159 */ 160 int (*blink_set)(struct led_classdev *led_cdev, 161 unsigned long *delay_on, 162 unsigned long *delay_off); 163 164 int (*pattern_set)(struct led_classdev *led_cdev, 165 struct led_pattern *pattern, u32 len, int repeat); 166 int (*pattern_clear)(struct led_classdev *led_cdev); 167 168 struct device *dev; 169 const struct attribute_group **groups; 170 171 struct list_head node; /* LED Device list */ 172 const char *default_trigger; /* Trigger to use */ 173 174 unsigned long blink_delay_on, blink_delay_off; 175 struct timer_list blink_timer; 176 int blink_brightness; 177 int new_blink_brightness; 178 void (*flash_resume)(struct led_classdev *led_cdev); 179 180 struct work_struct set_brightness_work; 181 int delayed_set_value; 182 unsigned long delayed_delay_on; 183 unsigned long delayed_delay_off; 184 185 #ifdef CONFIG_LEDS_TRIGGERS 186 /* Protects the trigger data below */ 187 struct rw_semaphore trigger_lock; 188 189 struct led_trigger *trigger; 190 struct list_head trig_list; 191 void *trigger_data; 192 /* true if activated - deactivate routine uses it to do cleanup */ 193 bool activated; 194 195 /* LEDs that have private triggers have this set */ 196 struct led_hw_trigger_type *trigger_type; 197 198 /* Unique trigger name supported by LED set in hw control mode */ 199 const char *hw_control_trigger; 200 /* 201 * Check if the LED driver supports the requested mode provided by the 202 * defined supported trigger to setup the LED to hw control mode. 203 * 204 * Return 0 on success. Return -EOPNOTSUPP when the passed flags are not 205 * supported and software fallback needs to be used. 206 * Return a negative error number on any other case for check fail due 207 * to various reason like device not ready or timeouts. 208 */ 209 int (*hw_control_is_supported)(struct led_classdev *led_cdev, 210 unsigned long flags); 211 /* 212 * Activate hardware control, LED driver will use the provided flags 213 * from the supported trigger and setup the LED to be driven by hardware 214 * following the requested mode from the trigger flags. 215 * Deactivate hardware blink control by setting brightness to LED_OFF via 216 * the brightness_set() callback. 217 * 218 * Return 0 on success, a negative error number on flags apply fail. 219 */ 220 int (*hw_control_set)(struct led_classdev *led_cdev, 221 unsigned long flags); 222 /* 223 * Get from the LED driver the current mode that the LED is set in hw 224 * control mode and put them in flags. 225 * Trigger can use this to get the initial state of a LED already set in 226 * hardware blink control. 227 * 228 * Return 0 on success, a negative error number on failing parsing the 229 * initial mode. Error from this function is NOT FATAL as the device 230 * may be in a not supported initial state by the attached LED trigger. 231 */ 232 int (*hw_control_get)(struct led_classdev *led_cdev, 233 unsigned long *flags); 234 /* 235 * Get the device this LED blinks in response to. 236 * e.g. for a PHY LED, it is the network device. If the LED is 237 * not yet associated to a device, return NULL. 238 */ 239 struct device *(*hw_control_get_device)(struct led_classdev *led_cdev); 240 #endif 241 242 #ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED 243 int brightness_hw_changed; 244 struct kernfs_node *brightness_hw_changed_kn; 245 #endif 246 247 /* Ensures consistent access to the LED Flash Class device */ 248 struct mutex led_access; 249 }; 250 251 /** 252 * led_classdev_register_ext - register a new object of LED class with 253 * init data 254 * @parent: LED controller device this LED is driven by 255 * @led_cdev: the led_classdev structure for this device 256 * @init_data: the LED class device initialization data 257 * 258 * Register a new object of LED class, with name derived from init_data. 259 * 260 * Returns: 0 on success or negative error value on failure 261 */ 262 int led_classdev_register_ext(struct device *parent, 263 struct led_classdev *led_cdev, 264 struct led_init_data *init_data); 265 266 /** 267 * led_classdev_register - register a new object of LED class 268 * @parent: LED controller device this LED is driven by 269 * @led_cdev: the led_classdev structure for this device 270 * 271 * Register a new object of LED class, with name derived from the name property 272 * of passed led_cdev argument. 273 * 274 * Returns: 0 on success or negative error value on failure 275 */ 276 static inline int led_classdev_register(struct device *parent, 277 struct led_classdev *led_cdev) 278 { 279 return led_classdev_register_ext(parent, led_cdev, NULL); 280 } 281 282 #if IS_ENABLED(CONFIG_LEDS_CLASS) 283 int devm_led_classdev_register_ext(struct device *parent, 284 struct led_classdev *led_cdev, 285 struct led_init_data *init_data); 286 #else 287 static inline int 288 devm_led_classdev_register_ext(struct device *parent, 289 struct led_classdev *led_cdev, 290 struct led_init_data *init_data) 291 { 292 return 0; 293 } 294 #endif 295 296 static inline int devm_led_classdev_register(struct device *parent, 297 struct led_classdev *led_cdev) 298 { 299 return devm_led_classdev_register_ext(parent, led_cdev, NULL); 300 } 301 void led_classdev_unregister(struct led_classdev *led_cdev); 302 void devm_led_classdev_unregister(struct device *parent, 303 struct led_classdev *led_cdev); 304 void led_classdev_suspend(struct led_classdev *led_cdev); 305 void led_classdev_resume(struct led_classdev *led_cdev); 306 307 void led_add_lookup(struct led_lookup_data *led_lookup); 308 void led_remove_lookup(struct led_lookup_data *led_lookup); 309 310 struct led_classdev *__must_check led_get(struct device *dev, char *con_id); 311 struct led_classdev *__must_check devm_led_get(struct device *dev, char *con_id); 312 313 extern struct led_classdev *of_led_get(struct device_node *np, int index); 314 extern void led_put(struct led_classdev *led_cdev); 315 struct led_classdev *__must_check devm_of_led_get(struct device *dev, 316 int index); 317 struct led_classdev *__must_check devm_of_led_get_optional(struct device *dev, 318 int index); 319 320 /** 321 * led_blink_set - set blinking with software fallback 322 * @led_cdev: the LED to start blinking 323 * @delay_on: the time it should be on (in ms) 324 * @delay_off: the time it should ble off (in ms) 325 * 326 * This function makes the LED blink, attempting to use the 327 * hardware acceleration if possible, but falling back to 328 * software blinking if there is no hardware blinking or if 329 * the LED refuses the passed values. 330 * 331 * This function may sleep! 332 * 333 * Note that if software blinking is active, simply calling 334 * led_cdev->brightness_set() will not stop the blinking, 335 * use led_set_brightness() instead. 336 */ 337 void led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on, 338 unsigned long *delay_off); 339 340 /** 341 * led_blink_set_nosleep - set blinking, guaranteed to not sleep 342 * @led_cdev: the LED to start blinking 343 * @delay_on: the time it should be on (in ms) 344 * @delay_off: the time it should ble off (in ms) 345 * 346 * This function makes the LED blink and is guaranteed to not sleep. Otherwise 347 * this is the same as led_blink_set(), see led_blink_set() for details. 348 */ 349 void led_blink_set_nosleep(struct led_classdev *led_cdev, unsigned long delay_on, 350 unsigned long delay_off); 351 352 /** 353 * led_blink_set_oneshot - do a oneshot software blink 354 * @led_cdev: the LED to start blinking 355 * @delay_on: the time it should be on (in ms) 356 * @delay_off: the time it should ble off (in ms) 357 * @invert: blink off, then on, leaving the led on 358 * 359 * This function makes the LED blink one time for delay_on + 360 * delay_off time, ignoring the request if another one-shot 361 * blink is already in progress. 362 * 363 * If invert is set, led blinks for delay_off first, then for 364 * delay_on and leave the led on after the on-off cycle. 365 * 366 * This function is guaranteed not to sleep. 367 */ 368 void led_blink_set_oneshot(struct led_classdev *led_cdev, 369 unsigned long *delay_on, unsigned long *delay_off, 370 int invert); 371 /** 372 * led_set_brightness - set LED brightness 373 * @led_cdev: the LED to set 374 * @brightness: the brightness to set it to 375 * 376 * Set an LED's brightness, and, if necessary, cancel the 377 * software blink timer that implements blinking when the 378 * hardware doesn't. This function is guaranteed not to sleep. 379 */ 380 void led_set_brightness(struct led_classdev *led_cdev, unsigned int brightness); 381 382 /** 383 * led_set_brightness_sync - set LED brightness synchronously 384 * @led_cdev: the LED to set 385 * @value: the brightness to set it to 386 * 387 * Set an LED's brightness immediately. This function will block 388 * the caller for the time required for accessing device registers, 389 * and it can sleep. 390 * 391 * Returns: 0 on success or negative error value on failure 392 */ 393 int led_set_brightness_sync(struct led_classdev *led_cdev, unsigned int value); 394 395 /** 396 * led_update_brightness - update LED brightness 397 * @led_cdev: the LED to query 398 * 399 * Get an LED's current brightness and update led_cdev->brightness 400 * member with the obtained value. 401 * 402 * Returns: 0 on success or negative error value on failure 403 */ 404 int led_update_brightness(struct led_classdev *led_cdev); 405 406 /** 407 * led_get_default_pattern - return default pattern 408 * 409 * @led_cdev: the LED to get default pattern for 410 * @size: pointer for storing the number of elements in returned array, 411 * modified only if return != NULL 412 * 413 * Return: Allocated array of integers with default pattern from device tree 414 * or NULL. Caller is responsible for kfree(). 415 */ 416 u32 *led_get_default_pattern(struct led_classdev *led_cdev, unsigned int *size); 417 418 /** 419 * led_sysfs_disable - disable LED sysfs interface 420 * @led_cdev: the LED to set 421 * 422 * Disable the led_cdev's sysfs interface. 423 */ 424 void led_sysfs_disable(struct led_classdev *led_cdev); 425 426 /** 427 * led_sysfs_enable - enable LED sysfs interface 428 * @led_cdev: the LED to set 429 * 430 * Enable the led_cdev's sysfs interface. 431 */ 432 void led_sysfs_enable(struct led_classdev *led_cdev); 433 434 /** 435 * led_compose_name - compose LED class device name 436 * @dev: LED controller device object 437 * @init_data: the LED class device initialization data 438 * @led_classdev_name: composed LED class device name 439 * 440 * Create LED class device name basing on the provided init_data argument. 441 * The name can have <devicename:color:function> or <color:function>. 442 * form, depending on the init_data configuration. 443 * 444 * Returns: 0 on success or negative error value on failure 445 */ 446 int led_compose_name(struct device *dev, struct led_init_data *init_data, 447 char *led_classdev_name); 448 449 /** 450 * led_sysfs_is_disabled - check if LED sysfs interface is disabled 451 * @led_cdev: the LED to query 452 * 453 * Returns: true if the led_cdev's sysfs interface is disabled. 454 */ 455 static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev) 456 { 457 return led_cdev->flags & LED_SYSFS_DISABLE; 458 } 459 460 /* 461 * LED Triggers 462 */ 463 /* Registration functions for simple triggers */ 464 #define DEFINE_LED_TRIGGER(x) static struct led_trigger *x; 465 #define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x; 466 467 #ifdef CONFIG_LEDS_TRIGGERS 468 469 #define TRIG_NAME_MAX 50 470 471 struct led_trigger { 472 /* Trigger Properties */ 473 const char *name; 474 int (*activate)(struct led_classdev *led_cdev); 475 void (*deactivate)(struct led_classdev *led_cdev); 476 477 /* LED-private triggers have this set */ 478 struct led_hw_trigger_type *trigger_type; 479 480 /* LEDs under control by this trigger (for simple triggers) */ 481 spinlock_t leddev_list_lock; 482 struct list_head led_cdevs; 483 484 /* Link to next registered trigger */ 485 struct list_head next_trig; 486 487 const struct attribute_group **groups; 488 }; 489 490 /* 491 * Currently the attributes in struct led_trigger::groups are added directly to 492 * the LED device. As this might change in the future, the following 493 * macros abstract getting the LED device and its trigger_data from the dev 494 * parameter passed to the attribute accessor functions. 495 */ 496 #define led_trigger_get_led(dev) ((struct led_classdev *)dev_get_drvdata((dev))) 497 #define led_trigger_get_drvdata(dev) (led_get_trigger_data(led_trigger_get_led(dev))) 498 499 /* Registration functions for complex triggers */ 500 int led_trigger_register(struct led_trigger *trigger); 501 void led_trigger_unregister(struct led_trigger *trigger); 502 int devm_led_trigger_register(struct device *dev, 503 struct led_trigger *trigger); 504 505 void led_trigger_register_simple(const char *name, 506 struct led_trigger **trigger); 507 void led_trigger_unregister_simple(struct led_trigger *trigger); 508 void led_trigger_event(struct led_trigger *trigger, enum led_brightness event); 509 void led_trigger_blink(struct led_trigger *trigger, unsigned long delay_on, 510 unsigned long delay_off); 511 void led_trigger_blink_oneshot(struct led_trigger *trigger, 512 unsigned long delay_on, 513 unsigned long delay_off, 514 int invert); 515 void led_trigger_set_default(struct led_classdev *led_cdev); 516 int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger); 517 void led_trigger_remove(struct led_classdev *led_cdev); 518 519 static inline void led_set_trigger_data(struct led_classdev *led_cdev, 520 void *trigger_data) 521 { 522 led_cdev->trigger_data = trigger_data; 523 } 524 525 static inline void *led_get_trigger_data(struct led_classdev *led_cdev) 526 { 527 return led_cdev->trigger_data; 528 } 529 530 /** 531 * led_trigger_rename_static - rename a trigger 532 * @name: the new trigger name 533 * @trig: the LED trigger to rename 534 * 535 * Change a LED trigger name by copying the string passed in 536 * name into current trigger name, which MUST be large 537 * enough for the new string. 538 * 539 * Note that name must NOT point to the same string used 540 * during LED registration, as that could lead to races. 541 * 542 * This is meant to be used on triggers with statically 543 * allocated name. 544 */ 545 void led_trigger_rename_static(const char *name, struct led_trigger *trig); 546 547 #define module_led_trigger(__led_trigger) \ 548 module_driver(__led_trigger, led_trigger_register, \ 549 led_trigger_unregister) 550 551 #else 552 553 /* Trigger has no members */ 554 struct led_trigger {}; 555 556 /* Trigger inline empty functions */ 557 static inline void led_trigger_register_simple(const char *name, 558 struct led_trigger **trigger) {} 559 static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {} 560 static inline void led_trigger_event(struct led_trigger *trigger, 561 enum led_brightness event) {} 562 static inline void led_trigger_blink(struct led_trigger *trigger, 563 unsigned long delay_on, 564 unsigned long delay_off) {} 565 static inline void led_trigger_blink_oneshot(struct led_trigger *trigger, 566 unsigned long delay_on, 567 unsigned long delay_off, 568 int invert) {} 569 static inline void led_trigger_set_default(struct led_classdev *led_cdev) {} 570 static inline int led_trigger_set(struct led_classdev *led_cdev, 571 struct led_trigger *trigger) 572 { 573 return 0; 574 } 575 576 static inline void led_trigger_remove(struct led_classdev *led_cdev) {} 577 static inline void led_set_trigger_data(struct led_classdev *led_cdev) {} 578 static inline void *led_get_trigger_data(struct led_classdev *led_cdev) 579 { 580 return NULL; 581 } 582 583 #endif /* CONFIG_LEDS_TRIGGERS */ 584 585 /* Trigger specific enum */ 586 enum led_trigger_netdev_modes { 587 TRIGGER_NETDEV_LINK = 0, 588 TRIGGER_NETDEV_LINK_10, 589 TRIGGER_NETDEV_LINK_100, 590 TRIGGER_NETDEV_LINK_1000, 591 TRIGGER_NETDEV_HALF_DUPLEX, 592 TRIGGER_NETDEV_FULL_DUPLEX, 593 TRIGGER_NETDEV_TX, 594 TRIGGER_NETDEV_RX, 595 596 /* Keep last */ 597 __TRIGGER_NETDEV_MAX, 598 }; 599 600 /* Trigger specific functions */ 601 #ifdef CONFIG_LEDS_TRIGGER_DISK 602 void ledtrig_disk_activity(bool write); 603 #else 604 static inline void ledtrig_disk_activity(bool write) {} 605 #endif 606 607 #ifdef CONFIG_LEDS_TRIGGER_MTD 608 void ledtrig_mtd_activity(void); 609 #else 610 static inline void ledtrig_mtd_activity(void) {} 611 #endif 612 613 #if defined(CONFIG_LEDS_TRIGGER_CAMERA) || defined(CONFIG_LEDS_TRIGGER_CAMERA_MODULE) 614 void ledtrig_flash_ctrl(bool on); 615 void ledtrig_torch_ctrl(bool on); 616 #else 617 static inline void ledtrig_flash_ctrl(bool on) {} 618 static inline void ledtrig_torch_ctrl(bool on) {} 619 #endif 620 621 /* 622 * Generic LED platform data for describing LED names and default triggers. 623 */ 624 struct led_info { 625 const char *name; 626 const char *default_trigger; 627 int flags; 628 }; 629 630 struct led_platform_data { 631 int num_leds; 632 struct led_info *leds; 633 }; 634 635 struct led_properties { 636 u32 color; 637 bool color_present; 638 const char *function; 639 u32 func_enum; 640 bool func_enum_present; 641 const char *label; 642 }; 643 644 typedef int (*gpio_blink_set_t)(struct gpio_desc *desc, int state, 645 unsigned long *delay_on, 646 unsigned long *delay_off); 647 648 /* For the leds-gpio driver */ 649 struct gpio_led { 650 const char *name; 651 const char *default_trigger; 652 unsigned gpio; 653 unsigned active_low : 1; 654 unsigned retain_state_suspended : 1; 655 unsigned panic_indicator : 1; 656 unsigned default_state : 2; 657 unsigned retain_state_shutdown : 1; 658 /* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */ 659 struct gpio_desc *gpiod; 660 }; 661 #define LEDS_GPIO_DEFSTATE_OFF LEDS_DEFSTATE_OFF 662 #define LEDS_GPIO_DEFSTATE_ON LEDS_DEFSTATE_ON 663 #define LEDS_GPIO_DEFSTATE_KEEP LEDS_DEFSTATE_KEEP 664 665 struct gpio_led_platform_data { 666 int num_leds; 667 const struct gpio_led *leds; 668 669 #define GPIO_LED_NO_BLINK_LOW 0 /* No blink GPIO state low */ 670 #define GPIO_LED_NO_BLINK_HIGH 1 /* No blink GPIO state high */ 671 #define GPIO_LED_BLINK 2 /* Please, blink */ 672 gpio_blink_set_t gpio_blink_set; 673 }; 674 675 #ifdef CONFIG_NEW_LEDS 676 struct platform_device *gpio_led_register_device( 677 int id, const struct gpio_led_platform_data *pdata); 678 #else 679 static inline struct platform_device *gpio_led_register_device( 680 int id, const struct gpio_led_platform_data *pdata) 681 { 682 return 0; 683 } 684 #endif 685 686 enum cpu_led_event { 687 CPU_LED_IDLE_START, /* CPU enters idle */ 688 CPU_LED_IDLE_END, /* CPU idle ends */ 689 CPU_LED_START, /* Machine starts, especially resume */ 690 CPU_LED_STOP, /* Machine stops, especially suspend */ 691 CPU_LED_HALTED, /* Machine shutdown */ 692 }; 693 #ifdef CONFIG_LEDS_TRIGGER_CPU 694 void ledtrig_cpu(enum cpu_led_event evt); 695 #else 696 static inline void ledtrig_cpu(enum cpu_led_event evt) 697 { 698 return; 699 } 700 #endif 701 702 #ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED 703 void led_classdev_notify_brightness_hw_changed( 704 struct led_classdev *led_cdev, unsigned int brightness); 705 #else 706 static inline void led_classdev_notify_brightness_hw_changed( 707 struct led_classdev *led_cdev, enum led_brightness brightness) { } 708 #endif 709 710 /** 711 * struct led_pattern - pattern interval settings 712 * @delta_t: pattern interval delay, in milliseconds 713 * @brightness: pattern interval brightness 714 */ 715 struct led_pattern { 716 u32 delta_t; 717 int brightness; 718 }; 719 720 enum led_audio { 721 LED_AUDIO_MUTE, /* master mute LED */ 722 LED_AUDIO_MICMUTE, /* mic mute LED */ 723 NUM_AUDIO_LEDS 724 }; 725 726 #if IS_ENABLED(CONFIG_LEDS_TRIGGER_AUDIO) 727 enum led_brightness ledtrig_audio_get(enum led_audio type); 728 void ledtrig_audio_set(enum led_audio type, enum led_brightness state); 729 #else 730 static inline enum led_brightness ledtrig_audio_get(enum led_audio type) 731 { 732 return LED_OFF; 733 } 734 static inline void ledtrig_audio_set(enum led_audio type, 735 enum led_brightness state) 736 { 737 } 738 #endif 739 740 #endif /* __LINUX_LEDS_H_INCLUDED */ 741