1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Driver model for leds and led triggers 4 * 5 * Copyright (C) 2005 John Lenz <[email protected]> 6 * Copyright (C) 2005 Richard Purdie <[email protected]> 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24 struct kernfs_node; 25 struct led_pattern; 26 struct platform_device; 27 28 /* 29 * LED Core 30 */ 31 32 /* This is obsolete/useless.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 enum led_default_state led_init_default_state_get(struct fwnode_handle *fwnode); 86 87 struct led_hw_trigger_type { 88 int dummy; 89 }; 90 91 struct led_classdev { 92 const char *name; 93 unsigned int brightness; 94 unsigned int max_brightness; 95 unsigned int color; 96 int flags; 97 98 /* Lower 16 bits reflect status */ 99 #define LED_SUSPENDED BIT(0) 100 #define LED_UNREGISTERING BIT(1) 101 /* Upper 16 bits reflect control information */ 102 #define LED_CORE_SUSPENDRESUME BIT(16) 103 #define LED_SYSFS_DISABLE BIT(17) 104 #define LED_DEV_CAP_FLASH BIT(18) 105 #define LED_HW_PLUGGABLE BIT(19) 106 #define LED_PANIC_INDICATOR BIT(20) 107 #define LED_BRIGHT_HW_CHANGED BIT(21) 108 #define LED_RETAIN_AT_SHUTDOWN BIT(22) 109 #define LED_INIT_DEFAULT_TRIGGER BIT(23) 110 #define LED_REJECT_NAME_CONFLICT BIT(24) 111 112 /* set_brightness_work / blink_timer flags, atomic, private. */ 113 unsigned long work_flags; 114 115 #define LED_BLINK_SW 0 116 #define LED_BLINK_ONESHOT 1 117 #define LED_BLINK_ONESHOT_STOP 2 118 #define LED_BLINK_INVERT 3 119 #define LED_BLINK_BRIGHTNESS_CHANGE 4 120 #define LED_BLINK_DISABLE 5 121 /* Brightness off also disables hw-blinking so it is a separate action */ 122 #define LED_SET_BRIGHTNESS_OFF 6 123 #define LED_SET_BRIGHTNESS 7 124 #define LED_SET_BLINK 8 125 126 /* Set LED brightness level 127 * Must not sleep. Use brightness_set_blocking for drivers 128 * that can sleep while setting brightness. 129 */ 130 void (*brightness_set)(struct led_classdev *led_cdev, 131 enum led_brightness brightness); 132 /* 133 * Set LED brightness level immediately - it can block the caller for 134 * the time required for accessing a LED device register. 135 */ 136 int (*brightness_set_blocking)(struct led_classdev *led_cdev, 137 enum led_brightness brightness); 138 /* Get LED brightness level */ 139 enum led_brightness (*brightness_get)(struct led_classdev *led_cdev); 140 141 /* 142 * Activate hardware accelerated blink, delays are in milliseconds 143 * and if both are zero then a sensible default should be chosen. 144 * The call should adjust the timings in that case and if it can't 145 * match the values specified exactly. 146 * Deactivate blinking again when the brightness is set to LED_OFF 147 * via the brightness_set() callback. 148 * For led_blink_set_nosleep() the LED core assumes that blink_set 149 * implementations, of drivers which do not use brightness_set_blocking, 150 * will not sleep. Therefor if brightness_set_blocking is not set 151 * this function must not sleep! 152 */ 153 int (*blink_set)(struct led_classdev *led_cdev, 154 unsigned long *delay_on, 155 unsigned long *delay_off); 156 157 int (*pattern_set)(struct led_classdev *led_cdev, 158 struct led_pattern *pattern, u32 len, int repeat); 159 int (*pattern_clear)(struct led_classdev *led_cdev); 160 161 struct device *dev; 162 const struct attribute_group **groups; 163 164 struct list_head node; /* LED Device list */ 165 const char *default_trigger; /* Trigger to use */ 166 167 unsigned long blink_delay_on, blink_delay_off; 168 struct timer_list blink_timer; 169 int blink_brightness; 170 int new_blink_brightness; 171 void (*flash_resume)(struct led_classdev *led_cdev); 172 173 struct work_struct set_brightness_work; 174 int delayed_set_value; 175 unsigned long delayed_delay_on; 176 unsigned long delayed_delay_off; 177 178 #ifdef CONFIG_LEDS_TRIGGERS 179 /* Protects the trigger data below */ 180 struct rw_semaphore trigger_lock; 181 182 struct led_trigger *trigger; 183 struct list_head trig_list; 184 void *trigger_data; 185 /* true if activated - deactivate routine uses it to do cleanup */ 186 bool activated; 187 188 /* LEDs that have private triggers have this set */ 189 struct led_hw_trigger_type *trigger_type; 190 191 /* Unique trigger name supported by LED set in hw control mode */ 192 const char *hw_control_trigger; 193 /* 194 * Check if the LED driver supports the requested mode provided by the 195 * defined supported trigger to setup the LED to hw control mode. 196 * 197 * Return 0 on success. Return -EOPNOTSUPP when the passed flags are not 198 * supported and software fallback needs to be used. 199 * Return a negative error number on any other case for check fail due 200 * to various reason like device not ready or timeouts. 201 */ 202 int (*hw_control_is_supported)(struct led_classdev *led_cdev, 203 unsigned long flags); 204 /* 205 * Activate hardware control, LED driver will use the provided flags 206 * from the supported trigger and setup the LED to be driven by hardware 207 * following the requested mode from the trigger flags. 208 * Deactivate hardware blink control by setting brightness to LED_OFF via 209 * the brightness_set() callback. 210 * 211 * Return 0 on success, a negative error number on flags apply fail. 212 */ 213 int (*hw_control_set)(struct led_classdev *led_cdev, 214 unsigned long flags); 215 /* 216 * Get from the LED driver the current mode that the LED is set in hw 217 * control mode and put them in flags. 218 * Trigger can use this to get the initial state of a LED already set in 219 * hardware blink control. 220 * 221 * Return 0 on success, a negative error number on failing parsing the 222 * initial mode. Error from this function is NOT FATAL as the device 223 * may be in a not supported initial state by the attached LED trigger. 224 */ 225 int (*hw_control_get)(struct led_classdev *led_cdev, 226 unsigned long *flags); 227 /* 228 * Get the device this LED blinks in response to. 229 * e.g. for a PHY LED, it is the network device. If the LED is 230 * not yet associated to a device, return NULL. 231 */ 232 struct device *(*hw_control_get_device)(struct led_classdev *led_cdev); 233 #endif 234 235 #ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED 236 int brightness_hw_changed; 237 struct kernfs_node *brightness_hw_changed_kn; 238 #endif 239 240 /* Ensures consistent access to the LED Flash Class device */ 241 struct mutex led_access; 242 }; 243 244 /** 245 * led_classdev_register_ext - register a new object of LED class with 246 * init data 247 * @parent: LED controller device this LED is driven by 248 * @led_cdev: the led_classdev structure for this device 249 * @init_data: the LED class device initialization data 250 * 251 * Register a new object of LED class, with name derived from init_data. 252 * 253 * Returns: 0 on success or negative error value on failure 254 */ 255 int led_classdev_register_ext(struct device *parent, 256 struct led_classdev *led_cdev, 257 struct led_init_data *init_data); 258 259 /** 260 * led_classdev_register - register a new object of LED class 261 * @parent: LED controller device this LED is driven by 262 * @led_cdev: the led_classdev structure for this device 263 * 264 * Register a new object of LED class, with name derived from the name property 265 * of passed led_cdev argument. 266 * 267 * Returns: 0 on success or negative error value on failure 268 */ 269 static inline int led_classdev_register(struct device *parent, 270 struct led_classdev *led_cdev) 271 { 272 return led_classdev_register_ext(parent, led_cdev, NULL); 273 } 274 275 int devm_led_classdev_register_ext(struct device *parent, 276 struct led_classdev *led_cdev, 277 struct led_init_data *init_data); 278 static inline int devm_led_classdev_register(struct device *parent, 279 struct led_classdev *led_cdev) 280 { 281 return devm_led_classdev_register_ext(parent, led_cdev, NULL); 282 } 283 void led_classdev_unregister(struct led_classdev *led_cdev); 284 void devm_led_classdev_unregister(struct device *parent, 285 struct led_classdev *led_cdev); 286 void led_classdev_suspend(struct led_classdev *led_cdev); 287 void led_classdev_resume(struct led_classdev *led_cdev); 288 289 void led_add_lookup(struct led_lookup_data *led_lookup); 290 void led_remove_lookup(struct led_lookup_data *led_lookup); 291 292 struct led_classdev *__must_check led_get(struct device *dev, char *con_id); 293 struct led_classdev *__must_check devm_led_get(struct device *dev, char *con_id); 294 295 extern struct led_classdev *of_led_get(struct device_node *np, int index); 296 extern void led_put(struct led_classdev *led_cdev); 297 struct led_classdev *__must_check devm_of_led_get(struct device *dev, 298 int index); 299 struct led_classdev *__must_check devm_of_led_get_optional(struct device *dev, 300 int index); 301 302 /** 303 * led_blink_set - set blinking with software fallback 304 * @led_cdev: the LED to start blinking 305 * @delay_on: the time it should be on (in ms) 306 * @delay_off: the time it should ble off (in ms) 307 * 308 * This function makes the LED blink, attempting to use the 309 * hardware acceleration if possible, but falling back to 310 * software blinking if there is no hardware blinking or if 311 * the LED refuses the passed values. 312 * 313 * This function may sleep! 314 * 315 * Note that if software blinking is active, simply calling 316 * led_cdev->brightness_set() will not stop the blinking, 317 * use led_set_brightness() instead. 318 */ 319 void led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on, 320 unsigned long *delay_off); 321 322 /** 323 * led_blink_set_nosleep - set blinking, guaranteed to not sleep 324 * @led_cdev: the LED to start blinking 325 * @delay_on: the time it should be on (in ms) 326 * @delay_off: the time it should ble off (in ms) 327 * 328 * This function makes the LED blink and is guaranteed to not sleep. Otherwise 329 * this is the same as led_blink_set(), see led_blink_set() for details. 330 */ 331 void led_blink_set_nosleep(struct led_classdev *led_cdev, unsigned long delay_on, 332 unsigned long delay_off); 333 334 /** 335 * led_blink_set_oneshot - do a oneshot software blink 336 * @led_cdev: the LED to start blinking 337 * @delay_on: the time it should be on (in ms) 338 * @delay_off: the time it should ble off (in ms) 339 * @invert: blink off, then on, leaving the led on 340 * 341 * This function makes the LED blink one time for delay_on + 342 * delay_off time, ignoring the request if another one-shot 343 * blink is already in progress. 344 * 345 * If invert is set, led blinks for delay_off first, then for 346 * delay_on and leave the led on after the on-off cycle. 347 * 348 * This function is guaranteed not to sleep. 349 */ 350 void led_blink_set_oneshot(struct led_classdev *led_cdev, 351 unsigned long *delay_on, unsigned long *delay_off, 352 int invert); 353 /** 354 * led_set_brightness - set LED brightness 355 * @led_cdev: the LED to set 356 * @brightness: the brightness to set it to 357 * 358 * Set an LED's brightness, and, if necessary, cancel the 359 * software blink timer that implements blinking when the 360 * hardware doesn't. This function is guaranteed not to sleep. 361 */ 362 void led_set_brightness(struct led_classdev *led_cdev, unsigned int brightness); 363 364 /** 365 * led_set_brightness_sync - set LED brightness synchronously 366 * @led_cdev: the LED to set 367 * @value: the brightness to set it to 368 * 369 * Set an LED's brightness immediately. This function will block 370 * the caller for the time required for accessing device registers, 371 * and it can sleep. 372 * 373 * Returns: 0 on success or negative error value on failure 374 */ 375 int led_set_brightness_sync(struct led_classdev *led_cdev, unsigned int value); 376 377 /** 378 * led_update_brightness - update LED brightness 379 * @led_cdev: the LED to query 380 * 381 * Get an LED's current brightness and update led_cdev->brightness 382 * member with the obtained value. 383 * 384 * Returns: 0 on success or negative error value on failure 385 */ 386 int led_update_brightness(struct led_classdev *led_cdev); 387 388 /** 389 * led_get_default_pattern - return default pattern 390 * 391 * @led_cdev: the LED to get default pattern for 392 * @size: pointer for storing the number of elements in returned array, 393 * modified only if return != NULL 394 * 395 * Return: Allocated array of integers with default pattern from device tree 396 * or NULL. Caller is responsible for kfree(). 397 */ 398 u32 *led_get_default_pattern(struct led_classdev *led_cdev, unsigned int *size); 399 400 /** 401 * led_sysfs_disable - disable LED sysfs interface 402 * @led_cdev: the LED to set 403 * 404 * Disable the led_cdev's sysfs interface. 405 */ 406 void led_sysfs_disable(struct led_classdev *led_cdev); 407 408 /** 409 * led_sysfs_enable - enable LED sysfs interface 410 * @led_cdev: the LED to set 411 * 412 * Enable the led_cdev's sysfs interface. 413 */ 414 void led_sysfs_enable(struct led_classdev *led_cdev); 415 416 /** 417 * led_compose_name - compose LED class device name 418 * @dev: LED controller device object 419 * @init_data: the LED class device initialization data 420 * @led_classdev_name: composed LED class device name 421 * 422 * Create LED class device name basing on the provided init_data argument. 423 * The name can have <devicename:color:function> or <color:function>. 424 * form, depending on the init_data configuration. 425 * 426 * Returns: 0 on success or negative error value on failure 427 */ 428 int led_compose_name(struct device *dev, struct led_init_data *init_data, 429 char *led_classdev_name); 430 431 /** 432 * led_get_color_name - get string representation of color ID 433 * @color_id: The LED_COLOR_ID_* constant 434 * 435 * Get the string name of a LED_COLOR_ID_* constant. 436 * 437 * Returns: A string constant or NULL on an invalid ID. 438 */ 439 const char *led_get_color_name(u8 color_id); 440 441 /** 442 * led_sysfs_is_disabled - check if LED sysfs interface is disabled 443 * @led_cdev: the LED to query 444 * 445 * Returns: true if the led_cdev's sysfs interface is disabled. 446 */ 447 static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev) 448 { 449 return led_cdev->flags & LED_SYSFS_DISABLE; 450 } 451 452 /* 453 * LED Triggers 454 */ 455 /* Registration functions for simple triggers */ 456 #define DEFINE_LED_TRIGGER(x) static struct led_trigger *x; 457 #define DEFINE_LED_TRIGGER_GLOBAL(x) struct led_trigger *x; 458 459 #ifdef CONFIG_LEDS_TRIGGERS 460 461 #define TRIG_NAME_MAX 50 462 463 struct led_trigger { 464 /* Trigger Properties */ 465 const char *name; 466 int (*activate)(struct led_classdev *led_cdev); 467 void (*deactivate)(struct led_classdev *led_cdev); 468 469 /* Brightness set by led_trigger_event */ 470 enum led_brightness brightness; 471 472 /* LED-private triggers have this set */ 473 struct led_hw_trigger_type *trigger_type; 474 475 /* LEDs under control by this trigger (for simple triggers) */ 476 spinlock_t leddev_list_lock; 477 struct list_head led_cdevs; 478 479 /* Link to next registered trigger */ 480 struct list_head next_trig; 481 482 const struct attribute_group **groups; 483 }; 484 485 /* 486 * Currently the attributes in struct led_trigger::groups are added directly to 487 * the LED device. As this might change in the future, the following 488 * macros abstract getting the LED device and its trigger_data from the dev 489 * parameter passed to the attribute accessor functions. 490 */ 491 #define led_trigger_get_led(dev) ((struct led_classdev *)dev_get_drvdata((dev))) 492 #define led_trigger_get_drvdata(dev) (led_get_trigger_data(led_trigger_get_led(dev))) 493 494 /* Registration functions for complex triggers */ 495 int led_trigger_register(struct led_trigger *trigger); 496 void led_trigger_unregister(struct led_trigger *trigger); 497 int devm_led_trigger_register(struct device *dev, 498 struct led_trigger *trigger); 499 500 void led_trigger_register_simple(const char *name, 501 struct led_trigger **trigger); 502 void led_trigger_unregister_simple(struct led_trigger *trigger); 503 void led_trigger_event(struct led_trigger *trigger, enum led_brightness event); 504 void led_trigger_blink(struct led_trigger *trigger, unsigned long delay_on, 505 unsigned long delay_off); 506 void led_trigger_blink_oneshot(struct led_trigger *trigger, 507 unsigned long delay_on, 508 unsigned long delay_off, 509 int invert); 510 void led_trigger_set_default(struct led_classdev *led_cdev); 511 int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger); 512 void led_trigger_remove(struct led_classdev *led_cdev); 513 514 static inline void led_set_trigger_data(struct led_classdev *led_cdev, 515 void *trigger_data) 516 { 517 led_cdev->trigger_data = trigger_data; 518 } 519 520 static inline void *led_get_trigger_data(struct led_classdev *led_cdev) 521 { 522 return led_cdev->trigger_data; 523 } 524 525 static inline enum led_brightness 526 led_trigger_get_brightness(const struct led_trigger *trigger) 527 { 528 return trigger ? trigger->brightness : LED_OFF; 529 } 530 531 #define module_led_trigger(__led_trigger) \ 532 module_driver(__led_trigger, led_trigger_register, \ 533 led_trigger_unregister) 534 535 #else 536 537 /* Trigger has no members */ 538 struct led_trigger {}; 539 540 /* Trigger inline empty functions */ 541 static inline void led_trigger_register_simple(const char *name, 542 struct led_trigger **trigger) {} 543 static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {} 544 static inline void led_trigger_event(struct led_trigger *trigger, 545 enum led_brightness event) {} 546 static inline void led_trigger_blink(struct led_trigger *trigger, 547 unsigned long delay_on, 548 unsigned long delay_off) {} 549 static inline void led_trigger_blink_oneshot(struct led_trigger *trigger, 550 unsigned long delay_on, 551 unsigned long delay_off, 552 int invert) {} 553 static inline void led_trigger_set_default(struct led_classdev *led_cdev) {} 554 static inline int led_trigger_set(struct led_classdev *led_cdev, 555 struct led_trigger *trigger) 556 { 557 return 0; 558 } 559 560 static inline void led_trigger_remove(struct led_classdev *led_cdev) {} 561 static inline void led_set_trigger_data(struct led_classdev *led_cdev) {} 562 static inline void *led_get_trigger_data(struct led_classdev *led_cdev) 563 { 564 return NULL; 565 } 566 567 static inline enum led_brightness 568 led_trigger_get_brightness(const struct led_trigger *trigger) 569 { 570 return LED_OFF; 571 } 572 573 #endif /* CONFIG_LEDS_TRIGGERS */ 574 575 /* Trigger specific enum */ 576 enum led_trigger_netdev_modes { 577 TRIGGER_NETDEV_LINK = 0, 578 TRIGGER_NETDEV_LINK_10, 579 TRIGGER_NETDEV_LINK_100, 580 TRIGGER_NETDEV_LINK_1000, 581 TRIGGER_NETDEV_LINK_2500, 582 TRIGGER_NETDEV_LINK_5000, 583 TRIGGER_NETDEV_LINK_10000, 584 TRIGGER_NETDEV_HALF_DUPLEX, 585 TRIGGER_NETDEV_FULL_DUPLEX, 586 TRIGGER_NETDEV_TX, 587 TRIGGER_NETDEV_RX, 588 589 /* Keep last */ 590 __TRIGGER_NETDEV_MAX, 591 }; 592 593 /* Trigger specific functions */ 594 #ifdef CONFIG_LEDS_TRIGGER_DISK 595 void ledtrig_disk_activity(bool write); 596 #else 597 static inline void ledtrig_disk_activity(bool write) {} 598 #endif 599 600 #ifdef CONFIG_LEDS_TRIGGER_MTD 601 void ledtrig_mtd_activity(void); 602 #else 603 static inline void ledtrig_mtd_activity(void) {} 604 #endif 605 606 #if defined(CONFIG_LEDS_TRIGGER_CAMERA) || defined(CONFIG_LEDS_TRIGGER_CAMERA_MODULE) 607 void ledtrig_flash_ctrl(bool on); 608 void ledtrig_torch_ctrl(bool on); 609 #else 610 static inline void ledtrig_flash_ctrl(bool on) {} 611 static inline void ledtrig_torch_ctrl(bool on) {} 612 #endif 613 614 /* 615 * Generic LED platform data for describing LED names and default triggers. 616 */ 617 struct led_info { 618 const char *name; 619 const char *default_trigger; 620 int flags; 621 }; 622 623 struct led_platform_data { 624 int num_leds; 625 struct led_info *leds; 626 }; 627 628 struct led_properties { 629 u32 color; 630 bool color_present; 631 const char *function; 632 u32 func_enum; 633 bool func_enum_present; 634 const char *label; 635 }; 636 637 typedef int (*gpio_blink_set_t)(struct gpio_desc *desc, int state, 638 unsigned long *delay_on, 639 unsigned long *delay_off); 640 641 /* For the leds-gpio driver */ 642 struct gpio_led { 643 const char *name; 644 const char *default_trigger; 645 unsigned gpio; 646 unsigned active_low : 1; 647 unsigned retain_state_suspended : 1; 648 unsigned panic_indicator : 1; 649 unsigned default_state : 2; 650 unsigned retain_state_shutdown : 1; 651 /* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */ 652 struct gpio_desc *gpiod; 653 }; 654 #define LEDS_GPIO_DEFSTATE_OFF LEDS_DEFSTATE_OFF 655 #define LEDS_GPIO_DEFSTATE_ON LEDS_DEFSTATE_ON 656 #define LEDS_GPIO_DEFSTATE_KEEP LEDS_DEFSTATE_KEEP 657 658 struct gpio_led_platform_data { 659 int num_leds; 660 const struct gpio_led *leds; 661 662 #define GPIO_LED_NO_BLINK_LOW 0 /* No blink GPIO state low */ 663 #define GPIO_LED_NO_BLINK_HIGH 1 /* No blink GPIO state high */ 664 #define GPIO_LED_BLINK 2 /* Please, blink */ 665 gpio_blink_set_t gpio_blink_set; 666 }; 667 668 #ifdef CONFIG_LEDS_GPIO_REGISTER 669 struct platform_device *gpio_led_register_device( 670 int id, const struct gpio_led_platform_data *pdata); 671 #else 672 static inline struct platform_device *gpio_led_register_device( 673 int id, const struct gpio_led_platform_data *pdata) 674 { 675 return 0; 676 } 677 #endif 678 679 enum cpu_led_event { 680 CPU_LED_IDLE_START, /* CPU enters idle */ 681 CPU_LED_IDLE_END, /* CPU idle ends */ 682 CPU_LED_START, /* Machine starts, especially resume */ 683 CPU_LED_STOP, /* Machine stops, especially suspend */ 684 CPU_LED_HALTED, /* Machine shutdown */ 685 }; 686 #ifdef CONFIG_LEDS_TRIGGER_CPU 687 void ledtrig_cpu(enum cpu_led_event evt); 688 #else 689 static inline void ledtrig_cpu(enum cpu_led_event evt) 690 { 691 return; 692 } 693 #endif 694 695 #ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED 696 void led_classdev_notify_brightness_hw_changed( 697 struct led_classdev *led_cdev, unsigned int brightness); 698 #else 699 static inline void led_classdev_notify_brightness_hw_changed( 700 struct led_classdev *led_cdev, enum led_brightness brightness) { } 701 #endif 702 703 /** 704 * struct led_pattern - pattern interval settings 705 * @delta_t: pattern interval delay, in milliseconds 706 * @brightness: pattern interval brightness 707 */ 708 struct led_pattern { 709 u32 delta_t; 710 int brightness; 711 }; 712 713 enum led_audio { 714 LED_AUDIO_MUTE, /* master mute LED */ 715 LED_AUDIO_MICMUTE, /* mic mute LED */ 716 NUM_AUDIO_LEDS 717 }; 718 719 #endif /* __LINUX_LEDS_H_INCLUDED */ 720