include/linux/leds.h

   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  32 /* This is obsolete/useless.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 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 #define LED_MULTI_COLOR         BIT(25)
 112
 113         /* set_brightness_work / blink_timer flags, atomic, private. */
 114         unsigned long           work_flags;
 115
 116 #define LED_BLINK_SW                    0
 117 #define LED_BLINK_ONESHOT               1
 118 #define LED_BLINK_ONESHOT_STOP          2
 119 #define LED_BLINK_INVERT                3
 120 #define LED_BLINK_BRIGHTNESS_CHANGE     4
 121 #define LED_BLINK_DISABLE               5
 122         /* Brightness off also disables hw-blinking so it is a separate action */
 123 #define LED_SET_BRIGHTNESS_OFF          6
 124 #define LED_SET_BRIGHTNESS              7
 125 #define LED_SET_BLINK                   8
 126
 127         /* Set LED brightness level
 128          * Must not sleep. Use brightness_set_blocking for drivers
 129          * that can sleep while setting brightness.
 130          */
 131         void            (*brightness_set)(struct led_classdev *led_cdev,
 132                                           enum led_brightness brightness);
 133         /*
 134          * Set LED brightness level immediately - it can block the caller for
 135          * the time required for accessing a LED device register.
 136          */
 137         int (*brightness_set_blocking)(struct led_classdev *led_cdev,
 138                                        enum led_brightness brightness);
 139         /* Get LED brightness level */
 140         enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);
 141
 142         /*
 143          * Activate hardware accelerated blink, delays are in milliseconds
 144          * and if both are zero then a sensible default should be chosen.
 145          * The call should adjust the timings in that case and if it can't
 146          * match the values specified exactly.
 147          * Deactivate blinking again when the brightness is set to LED_OFF
 148          * via the brightness_set() callback.
 149          * For led_blink_set_nosleep() the LED core assumes that blink_set
 150          * implementations, of drivers which do not use brightness_set_blocking,
 151          * will not sleep. Therefor if brightness_set_blocking is not set
 152          * this function must not sleep!
 153          */
 154         int             (*blink_set)(struct led_classdev *led_cdev,
 155                                      unsigned long *delay_on,
 156                                      unsigned long *delay_off);
 157
 158         int (*pattern_set)(struct led_classdev *led_cdev,
 159                            struct led_pattern *pattern, u32 len, int repeat);
 160         int (*pattern_clear)(struct led_classdev *led_cdev);
 161
 162         struct device           *dev;
 163         const struct attribute_group    **groups;
 164
 165         struct list_head         node;                  /* LED Device list */
 166         const char              *default_trigger;       /* Trigger to use */
 167
 168         unsigned long            blink_delay_on, blink_delay_off;
 169         struct timer_list        blink_timer;
 170         int                      blink_brightness;
 171         int                      new_blink_brightness;
 172         void                    (*flash_resume)(struct led_classdev *led_cdev);
 173
 174         struct workqueue_struct *wq;                    /* LED workqueue */
 175         struct work_struct      set_brightness_work;
 176         int                     delayed_set_value;
 177         unsigned long           delayed_delay_on;
 178         unsigned long           delayed_delay_off;
 179
 180 #ifdef CONFIG_LEDS_TRIGGERS
 181         /* Protects the trigger data below */
 182         struct rw_semaphore      trigger_lock;
 183
 184         struct led_trigger      *trigger;
 185         struct list_head         trig_list;
 186         void                    *trigger_data;
 187         /* true if activated - deactivate routine uses it to do cleanup */
 188         bool                    activated;
 189
 190         /* LEDs that have private triggers have this set */
 191         struct led_hw_trigger_type      *trigger_type;
 192
 193         /* Unique trigger name supported by LED set in hw control mode */
 194         const char              *hw_control_trigger;
 195         /*
 196          * Check if the LED driver supports the requested mode provided by the
 197          * defined supported trigger to setup the LED to hw control mode.
 198          *
 199          * Return 0 on success. Return -EOPNOTSUPP when the passed flags are not
 200          * supported and software fallback needs to be used.
 201          * Return a negative error number on any other case  for check fail due
 202          * to various reason like device not ready or timeouts.
 203          */
 204         int                     (*hw_control_is_supported)(struct led_classdev *led_cdev,
 205                                                            unsigned long flags);
 206         /*
 207          * Activate hardware control, LED driver will use the provided flags
 208          * from the supported trigger and setup the LED to be driven by hardware
 209          * following the requested mode from the trigger flags.
 210          * Deactivate hardware blink control by setting brightness to LED_OFF via
 211          * the brightness_set() callback.
 212          *
 213          * Return 0 on success, a negative error number on flags apply fail.
 214          */
 215         int                     (*hw_control_set)(struct led_classdev *led_cdev,
 216                                                   unsigned long flags);
 217         /*
 218          * Get from the LED driver the current mode that the LED is set in hw
 219          * control mode and put them in flags.
 220          * Trigger can use this to get the initial state of a LED already set in
 221          * hardware blink control.
 222          *
 223          * Return 0 on success, a negative error number on failing parsing the
 224          * initial mode. Error from this function is NOT FATAL as the device
 225          * may be in a not supported initial state by the attached LED trigger.
 226          */
 227         int                     (*hw_control_get)(struct led_classdev *led_cdev,
 228                                                   unsigned long *flags);
 229         /*
 230          * Get the device this LED blinks in response to.
 231          * e.g. for a PHY LED, it is the network device. If the LED is
 232          * not yet associated to a device, return NULL.
 233          */
 234         struct device           *(*hw_control_get_device)(struct led_classdev *led_cdev);
 235 #endif
 236
 237 #ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED
 238         int                      brightness_hw_changed;
 239         struct kernfs_node      *brightness_hw_changed_kn;
 240 #endif
 241
 242         /* Ensures consistent access to the LED class device */
 243         struct mutex            led_access;
 244 };
 245
 246 /**
 247  * led_classdev_register_ext - register a new object of LED class with
 248  *                             init data
 249  * @parent: LED controller device this LED is driven by
 250  * @led_cdev: the led_classdev structure for this device
 251  * @init_data: the LED class device initialization data
 252  *
 253  * Register a new object of LED class, with name derived from init_data.
 254  *
 255  * Returns: 0 on success or negative error value on failure
 256  */
 257 int led_classdev_register_ext(struct device *parent,
 258                                      struct led_classdev *led_cdev,
 259                                      struct led_init_data *init_data);
 260
 261 /**
 262  * led_classdev_register - register a new object of LED class
 263  * @parent: LED controller device this LED is driven by
 264  * @led_cdev: the led_classdev structure for this device
 265  *
 266  * Register a new object of LED class, with name derived from the name property
 267  * of passed led_cdev argument.
 268  *
 269  * Returns: 0 on success or negative error value on failure
 270  */
 271 static inline int led_classdev_register(struct device *parent,
 272                                         struct led_classdev *led_cdev)
 273 {
 274         return led_classdev_register_ext(parent, led_cdev, NULL);
 275 }
 276
 277 int devm_led_classdev_register_ext(struct device *parent,
 278                                           struct led_classdev *led_cdev,
 279                                           struct led_init_data *init_data);
 280 static inline int devm_led_classdev_register(struct device *parent,
 281                                              struct led_classdev *led_cdev)
 282 {
 283         return devm_led_classdev_register_ext(parent, led_cdev, NULL);
 284 }
 285 void led_classdev_unregister(struct led_classdev *led_cdev);
 286 void devm_led_classdev_unregister(struct device *parent,
 287                                   struct led_classdev *led_cdev);
 288 void led_classdev_suspend(struct led_classdev *led_cdev);
 289 void led_classdev_resume(struct led_classdev *led_cdev);
 290
 291 void led_add_lookup(struct led_lookup_data *led_lookup);
 292 void led_remove_lookup(struct led_lookup_data *led_lookup);
 293
 294 struct led_classdev *__must_check led_get(struct device *dev, char *con_id);
 295 struct led_classdev *__must_check devm_led_get(struct device *dev, char *con_id);
 296
 297 extern struct led_classdev *of_led_get(struct device_node *np, int index);
 298 extern void led_put(struct led_classdev *led_cdev);
 299 struct led_classdev *__must_check devm_of_led_get(struct device *dev,
 300                                                   int index);
 301 struct led_classdev *__must_check devm_of_led_get_optional(struct device *dev,
 302                                                   int index);
 303
 304 /**
 305  * led_blink_set - set blinking with software fallback
 306  * @led_cdev: the LED to start blinking
 307  * @delay_on: the time it should be on (in ms)
 308  * @delay_off: the time it should ble off (in ms)
 309  *
 310  * This function makes the LED blink, attempting to use the
 311  * hardware acceleration if possible, but falling back to
 312  * software blinking if there is no hardware blinking or if
 313  * the LED refuses the passed values.
 314  *
 315  * This function may sleep!
 316  *
 317  * Note that if software blinking is active, simply calling
 318  * led_cdev->brightness_set() will not stop the blinking,
 319  * use led_set_brightness() instead.
 320  */
 321 void led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
 322                    unsigned long *delay_off);
 323
 324 /**
 325  * led_blink_set_nosleep - set blinking, guaranteed to not sleep
 326  * @led_cdev: the LED to start blinking
 327  * @delay_on: the time it should be on (in ms)
 328  * @delay_off: the time it should ble off (in ms)
 329  *
 330  * This function makes the LED blink and is guaranteed to not sleep. Otherwise
 331  * this is the same as led_blink_set(), see led_blink_set() for details.
 332  */
 333 void led_blink_set_nosleep(struct led_classdev *led_cdev, unsigned long delay_on,
 334                            unsigned long delay_off);
 335
 336 /**
 337  * led_blink_set_oneshot - do a oneshot software blink
 338  * @led_cdev: the LED to start blinking
 339  * @delay_on: the time it should be on (in ms)
 340  * @delay_off: the time it should ble off (in ms)
 341  * @invert: blink off, then on, leaving the led on
 342  *
 343  * This function makes the LED blink one time for delay_on +
 344  * delay_off time, ignoring the request if another one-shot
 345  * blink is already in progress.
 346  *
 347  * If invert is set, led blinks for delay_off first, then for
 348  * delay_on and leave the led on after the on-off cycle.
 349  *
 350  * This function is guaranteed not to sleep.
 351  */
 352 void led_blink_set_oneshot(struct led_classdev *led_cdev,
 353                            unsigned long *delay_on, unsigned long *delay_off,
 354                            int invert);
 355 /**
 356  * led_set_brightness - set LED brightness
 357  * @led_cdev: the LED to set
 358  * @brightness: the brightness to set it to
 359  *
 360  * Set an LED's brightness, and, if necessary, cancel the
 361  * software blink timer that implements blinking when the
 362  * hardware doesn't. This function is guaranteed not to sleep.
 363  */
 364 void led_set_brightness(struct led_classdev *led_cdev, unsigned int brightness);
 365
 366 /**
 367  * led_set_brightness_sync - set LED brightness synchronously
 368  * @led_cdev: the LED to set
 369  * @value: the brightness to set it to
 370  *
 371  * Set an LED's brightness immediately. This function will block
 372  * the caller for the time required for accessing device registers,
 373  * and it can sleep.
 374  *
 375  * Returns: 0 on success or negative error value on failure
 376  */
 377 int led_set_brightness_sync(struct led_classdev *led_cdev, unsigned int value);
 378
 379 /**
 380  * led_mc_set_brightness - set mc LED color intensity values and brightness
 381  * @led_cdev: the LED to set
 382  * @intensity_value: array of per color intensity values to set
 383  * @num_colors: amount of entries in intensity_value array
 384  * @brightness: the brightness to set the LED to
 385  *
 386  * Set a multi-color LED's per color intensity values and brightness.
 387  * If necessary, this cancels the software blink timer. This function is
 388  * guaranteed not to sleep.
 389  *
 390  * Calling this function on a non multi-color led_classdev or with the wrong
 391  * num_colors value is an error. In this case an error will be logged once
 392  * and the call will do nothing.
 393  */
 394 void led_mc_set_brightness(struct led_classdev *led_cdev,
 395                            unsigned int *intensity_value, unsigned int num_colors,
 396                            unsigned int brightness);
 397
 398 /**
 399  * led_update_brightness - update LED brightness
 400  * @led_cdev: the LED to query
 401  *
 402  * Get an LED's current brightness and update led_cdev->brightness
 403  * member with the obtained value.
 404  *
 405  * Returns: 0 on success or negative error value on failure
 406  */
 407 int led_update_brightness(struct led_classdev *led_cdev);
 408
 409 /**
 410  * led_get_default_pattern - return default pattern
 411  *
 412  * @led_cdev: the LED to get default pattern for
 413  * @size:     pointer for storing the number of elements in returned array,
 414  *            modified only if return != NULL
 415  *
 416  * Return:    Allocated array of integers with default pattern from device tree
 417  *            or NULL.  Caller is responsible for kfree().
 418  */
 419 u32 *led_get_default_pattern(struct led_classdev *led_cdev, unsigned int *size);
 420
 421 /**
 422  * led_sysfs_disable - disable LED sysfs interface
 423  * @led_cdev: the LED to set
 424  *
 425  * Disable the led_cdev's sysfs interface.
 426  */
 427 void led_sysfs_disable(struct led_classdev *led_cdev);
 428
 429 /**
 430  * led_sysfs_enable - enable LED sysfs interface
 431  * @led_cdev: the LED to set
 432  *
 433  * Enable the led_cdev's sysfs interface.
 434  */
 435 void led_sysfs_enable(struct led_classdev *led_cdev);
 436
 437 /**
 438  * led_compose_name - compose LED class device name
 439  * @dev: LED controller device object
 440  * @init_data: the LED class device initialization data
 441  * @led_classdev_name: composed LED class device name
 442  *
 443  * Create LED class device name basing on the provided init_data argument.
 444  * The name can have <devicename:color:function> or <color:function>.
 445  * form, depending on the init_data configuration.
 446  *
 447  * Returns: 0 on success or negative error value on failure
 448  */
 449 int led_compose_name(struct device *dev, struct led_init_data *init_data,
 450                      char *led_classdev_name);
 451
 452 /**
 453  * led_get_color_name - get string representation of color ID
 454  * @color_id: The LED_COLOR_ID_* constant
 455  *
 456  * Get the string name of a LED_COLOR_ID_* constant.
 457  *
 458  * Returns: A string constant or NULL on an invalid ID.
 459  */
 460 const char *led_get_color_name(u8 color_id);
 461
 462 /**
 463  * led_sysfs_is_disabled - check if LED sysfs interface is disabled
 464  * @led_cdev: the LED to query
 465  *
 466  * Returns: true if the led_cdev's sysfs interface is disabled.
 467  */
 468 static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev)
 469 {
 470         return led_cdev->flags & LED_SYSFS_DISABLE;
 471 }
 472
 473 /*
 474  * LED Triggers
 475  */
 476 /* Registration functions for simple triggers */
 477 #define DEFINE_LED_TRIGGER(x)           static struct led_trigger *x;
 478 #define DEFINE_LED_TRIGGER_GLOBAL(x)    struct led_trigger *x;
 479
 480 #ifdef CONFIG_LEDS_TRIGGERS
 481
 482 #define TRIG_NAME_MAX 50
 483
 484 struct led_trigger {
 485         /* Trigger Properties */
 486         const char       *name;
 487         int             (*activate)(struct led_classdev *led_cdev);
 488         void            (*deactivate)(struct led_classdev *led_cdev);
 489
 490         /* Brightness set by led_trigger_event */
 491         enum led_brightness brightness;
 492
 493         /* LED-private triggers have this set */
 494         struct led_hw_trigger_type *trigger_type;
 495
 496         /* LEDs under control by this trigger (for simple triggers) */
 497         spinlock_t        leddev_list_lock;
 498         struct list_head  led_cdevs;
 499
 500         /* Link to next registered trigger */
 501         struct list_head  next_trig;
 502
 503         const struct attribute_group **groups;
 504 };
 505
 506 /*
 507  * Currently the attributes in struct led_trigger::groups are added directly to
 508  * the LED device. As this might change in the future, the following
 509  * macros abstract getting the LED device and its trigger_data from the dev
 510  * parameter passed to the attribute accessor functions.
 511  */
 512 #define led_trigger_get_led(dev)        ((struct led_classdev *)dev_get_drvdata((dev)))
 513 #define led_trigger_get_drvdata(dev)    (led_get_trigger_data(led_trigger_get_led(dev)))
 514
 515 /* Registration functions for complex triggers */
 516 int led_trigger_register(struct led_trigger *trigger);
 517 void led_trigger_unregister(struct led_trigger *trigger);
 518 int devm_led_trigger_register(struct device *dev,
 519                                      struct led_trigger *trigger);
 520
 521 void led_trigger_register_simple(const char *name,
 522                                 struct led_trigger **trigger);
 523 void led_trigger_unregister_simple(struct led_trigger *trigger);
 524 void led_trigger_event(struct led_trigger *trigger,  enum led_brightness event);
 525 void led_mc_trigger_event(struct led_trigger *trig,
 526                           unsigned int *intensity_value, unsigned int num_colors,
 527                           enum led_brightness brightness);
 528 void led_trigger_blink(struct led_trigger *trigger, unsigned long delay_on,
 529                        unsigned long delay_off);
 530 void led_trigger_blink_oneshot(struct led_trigger *trigger,
 531                                unsigned long delay_on,
 532                                unsigned long delay_off,
 533                                int invert);
 534 void led_trigger_set_default(struct led_classdev *led_cdev);
 535 int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger);
 536 void led_trigger_remove(struct led_classdev *led_cdev);
 537
 538 static inline void led_set_trigger_data(struct led_classdev *led_cdev,
 539                                         void *trigger_data)
 540 {
 541         led_cdev->trigger_data = trigger_data;
 542 }
 543
 544 static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
 545 {
 546         return led_cdev->trigger_data;
 547 }
 548
 549 static inline enum led_brightness
 550 led_trigger_get_brightness(const struct led_trigger *trigger)
 551 {
 552         return trigger ? trigger->brightness : LED_OFF;
 553 }
 554
 555 #define module_led_trigger(__led_trigger) \
 556         module_driver(__led_trigger, led_trigger_register, \
 557                       led_trigger_unregister)
 558
 559 #else
 560
 561 /* Trigger has no members */
 562 struct led_trigger {};
 563
 564 /* Trigger inline empty functions */
 565 static inline void led_trigger_register_simple(const char *name,
 566                                         struct led_trigger **trigger) {}
 567 static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {}
 568 static inline void led_trigger_event(struct led_trigger *trigger,
 569                                 enum led_brightness event) {}
 570 static inline void led_mc_trigger_event(struct led_trigger *trig,
 571                                 unsigned int *intensity_value, unsigned int num_colors,
 572                                 enum led_brightness brightness) {}
 573 static inline void led_trigger_blink(struct led_trigger *trigger,
 574                                       unsigned long delay_on,
 575                                       unsigned long delay_off) {}
 576 static inline void led_trigger_blink_oneshot(struct led_trigger *trigger,
 577                                       unsigned long delay_on,
 578                                       unsigned long delay_off,
 579                                       int invert) {}
 580 static inline void led_trigger_set_default(struct led_classdev *led_cdev) {}
 581 static inline int led_trigger_set(struct led_classdev *led_cdev,
 582                                   struct led_trigger *trigger)
 583 {
 584         return 0;
 585 }
 586
 587 static inline void led_trigger_remove(struct led_classdev *led_cdev) {}
 588 static inline void led_set_trigger_data(struct led_classdev *led_cdev) {}
 589 static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
 590 {
 591         return NULL;
 592 }
 593
 594 static inline enum led_brightness
 595 led_trigger_get_brightness(const struct led_trigger *trigger)
 596 {
 597         return LED_OFF;
 598 }
 599
 600 #endif /* CONFIG_LEDS_TRIGGERS */
 601
 602 /* Trigger specific enum */
 603 enum led_trigger_netdev_modes {
 604         TRIGGER_NETDEV_LINK = 0,
 605         TRIGGER_NETDEV_LINK_10,
 606         TRIGGER_NETDEV_LINK_100,
 607         TRIGGER_NETDEV_LINK_1000,
 608         TRIGGER_NETDEV_LINK_2500,
 609         TRIGGER_NETDEV_LINK_5000,
 610         TRIGGER_NETDEV_LINK_10000,
 611         TRIGGER_NETDEV_HALF_DUPLEX,
 612         TRIGGER_NETDEV_FULL_DUPLEX,
 613         TRIGGER_NETDEV_TX,
 614         TRIGGER_NETDEV_RX,
 615         TRIGGER_NETDEV_TX_ERR,
 616         TRIGGER_NETDEV_RX_ERR,
 617
 618         /* Keep last */
 619         __TRIGGER_NETDEV_MAX,
 620 };
 621
 622 /* Trigger specific functions */
 623 #ifdef CONFIG_LEDS_TRIGGER_DISK
 624 void ledtrig_disk_activity(bool write);
 625 #else
 626 static inline void ledtrig_disk_activity(bool write) {}
 627 #endif
 628
 629 #ifdef CONFIG_LEDS_TRIGGER_MTD
 630 void ledtrig_mtd_activity(void);
 631 #else
 632 static inline void ledtrig_mtd_activity(void) {}
 633 #endif
 634
 635 #if defined(CONFIG_LEDS_TRIGGER_CAMERA) || defined(CONFIG_LEDS_TRIGGER_CAMERA_MODULE)
 636 void ledtrig_flash_ctrl(bool on);
 637 void ledtrig_torch_ctrl(bool on);
 638 #else
 639 static inline void ledtrig_flash_ctrl(bool on) {}
 640 static inline void ledtrig_torch_ctrl(bool on) {}
 641 #endif
 642
 643 /*
 644  * Generic LED platform data for describing LED names and default triggers.
 645  */
 646 struct led_info {
 647         const char      *name;
 648         const char      *default_trigger;
 649         int             flags;
 650 };
 651
 652 struct led_platform_data {
 653         int             num_leds;
 654         struct led_info *leds;
 655 };
 656
 657 struct led_properties {
 658         u32             color;
 659         bool            color_present;
 660         const char      *function;
 661         u32             func_enum;
 662         bool            func_enum_present;
 663         const char      *label;
 664 };
 665
 666 typedef int (*gpio_blink_set_t)(struct gpio_desc *desc, int state,
 667                                 unsigned long *delay_on,
 668                                 unsigned long *delay_off);
 669
 670 /* For the leds-gpio driver */
 671 struct gpio_led {
 672         const char *name;
 673         const char *default_trigger;
 674         unsigned        gpio;
 675         unsigned        active_low : 1;
 676         unsigned        retain_state_suspended : 1;
 677         unsigned        panic_indicator : 1;
 678         unsigned        default_state : 2;
 679         unsigned        retain_state_shutdown : 1;
 680         /* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */
 681         struct gpio_desc *gpiod;
 682 };
 683 #define LEDS_GPIO_DEFSTATE_OFF          LEDS_DEFSTATE_OFF
 684 #define LEDS_GPIO_DEFSTATE_ON           LEDS_DEFSTATE_ON
 685 #define LEDS_GPIO_DEFSTATE_KEEP         LEDS_DEFSTATE_KEEP
 686
 687 struct gpio_led_platform_data {
 688         int             num_leds;
 689         const struct gpio_led *leds;
 690
 691 #define GPIO_LED_NO_BLINK_LOW   0       /* No blink GPIO state low */
 692 #define GPIO_LED_NO_BLINK_HIGH  1       /* No blink GPIO state high */
 693 #define GPIO_LED_BLINK          2       /* Please, blink */
 694         gpio_blink_set_t        gpio_blink_set;
 695 };
 696
 697 #ifdef CONFIG_LEDS_GPIO_REGISTER
 698 struct platform_device *gpio_led_register_device(
 699                 int id, const struct gpio_led_platform_data *pdata);
 700 #else
 701 static inline struct platform_device *gpio_led_register_device(
 702                 int id, const struct gpio_led_platform_data *pdata)
 703 {
 704         return 0;
 705 }
 706 #endif
 707
 708 enum cpu_led_event {
 709         CPU_LED_IDLE_START,     /* CPU enters idle */
 710         CPU_LED_IDLE_END,       /* CPU idle ends */
 711         CPU_LED_START,          /* Machine starts, especially resume */
 712         CPU_LED_STOP,           /* Machine stops, especially suspend */
 713         CPU_LED_HALTED,         /* Machine shutdown */
 714 };
 715 #ifdef CONFIG_LEDS_TRIGGER_CPU
 716 void ledtrig_cpu(enum cpu_led_event evt);
 717 #else
 718 static inline void ledtrig_cpu(enum cpu_led_event evt)
 719 {
 720         return;
 721 }
 722 #endif
 723
 724 #ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED
 725 void led_classdev_notify_brightness_hw_changed(
 726         struct led_classdev *led_cdev, unsigned int brightness);
 727 #else
 728 static inline void led_classdev_notify_brightness_hw_changed(
 729         struct led_classdev *led_cdev, enum led_brightness brightness) { }
 730 #endif
 731
 732 /**
 733  * struct led_pattern - pattern interval settings
 734  * @delta_t: pattern interval delay, in milliseconds
 735  * @brightness: pattern interval brightness
 736  */
 737 struct led_pattern {
 738         u32 delta_t;
 739         int brightness;
 740 };
 741
 742 enum led_audio {
 743         LED_AUDIO_MUTE,         /* master mute LED */
 744         LED_AUDIO_MICMUTE,      /* mic mute LED */
 745         NUM_AUDIO_LEDS
 746 };
 747
 748 #endif          /* __LINUX_LEDS_H_INCLUDED */