/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Driver model for leds and led triggers
 *
 * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
 * Copyright (C) 2005 Richard Purdie <rpurdie@openedhand.com>
 */
#ifndef __LINUX_LEDS_H_INCLUDED
#define __LINUX_LEDS_H_INCLUDED

#include <dt-bindings/leds/common.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/workqueue.h>

struct attribute_group;
struct device_node;
struct fwnode_handle;
struct gpio_desc;
struct kernfs_node;
struct led_pattern;
struct platform_device;

/*
 * LED Core
 */

/* This is obsolete/useless. We now support variable maximum brightness. */
enum led_brightness {
        LED_OFF         = 0,
        LED_ON          = 1,
        LED_HALF        = 127,
        LED_FULL        = 255,
};

enum led_default_state {
        LEDS_DEFSTATE_OFF       = 0,
        LEDS_DEFSTATE_ON        = 1,
        LEDS_DEFSTATE_KEEP      = 2,
};

/**
 * struct led_lookup_data - represents a single LED lookup entry
 *
 * @list: internal list of all LED lookup entries
 * @provider: name of led_classdev providing the LED
 * @dev_id: name of the device associated with this LED
 * @con_id: name of the LED from the device's point of view
 */
struct led_lookup_data {
        struct list_head list;
        const char *provider;
        const char *dev_id;
        const char *con_id;
};

struct led_init_data {
        /* device fwnode handle */
        struct fwnode_handle *fwnode;
        /*
         * default <color:function> tuple, for backward compatibility
         * with in-driver hard-coded LED names used as a fallback when
         * DT "label" property is absent; it should be set to NULL
         * in new LED class drivers.
         */
        const char *default_label;
        /*
         * string to be used for devicename section of LED class device
         * either for label based LED name composition path or for fwnode
         * based when devname_mandatory is true
         */
        const char *devicename;
        /*
         * indicates if LED name should always comprise devicename section;
         * only LEDs exposed by drivers of hot-pluggable devices should
         * set it to true
         */
        bool devname_mandatory;
};

enum led_default_state led_init_default_state_get(struct fwnode_handle *fwnode);

struct led_hw_trigger_type {
        int dummy;
};

struct led_classdev {
        const char              *name;
        unsigned int brightness;
        unsigned int max_brightness;
        unsigned int color;
        int                      flags;

        /* Lower 16 bits reflect status */
#define LED_SUSPENDED           BIT(0)
#define LED_UNREGISTERING       BIT(1)
        /* Upper 16 bits reflect control information */
#define LED_CORE_SUSPENDRESUME  BIT(16)
#define LED_SYSFS_DISABLE       BIT(17)
#define LED_DEV_CAP_FLASH       BIT(18)
#define LED_HW_PLUGGABLE        BIT(19)
#define LED_PANIC_INDICATOR     BIT(20)
#define LED_BRIGHT_HW_CHANGED   BIT(21)
#define LED_RETAIN_AT_SHUTDOWN  BIT(22)
#define LED_INIT_DEFAULT_TRIGGER BIT(23)
#define LED_REJECT_NAME_CONFLICT BIT(24)
#define LED_MULTI_COLOR         BIT(25)

        /* set_brightness_work / blink_timer flags, atomic, private. */
        unsigned long           work_flags;

#define LED_BLINK_SW                    0
#define LED_BLINK_ONESHOT               1
#define LED_BLINK_ONESHOT_STOP          2
#define LED_BLINK_INVERT                3
#define LED_BLINK_BRIGHTNESS_CHANGE     4
#define LED_BLINK_DISABLE               5
        /* Brightness off also disables hw-blinking so it is a separate action */
#define LED_SET_BRIGHTNESS_OFF          6
#define LED_SET_BRIGHTNESS              7
#define LED_SET_BLINK                   8

        /* Set LED brightness level
         * Must not sleep. Use brightness_set_blocking for drivers
         * that can sleep while setting brightness.
         */
        void            (*brightness_set)(struct led_classdev *led_cdev,
                                          enum led_brightness brightness);
        /*
         * Set LED brightness level immediately - it can block the caller for
         * the time required for accessing a LED device register.
         */
        int (*brightness_set_blocking)(struct led_classdev *led_cdev,
                                       enum led_brightness brightness);
        /* Get LED brightness level */
        enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);

        /*
         * Activate hardware accelerated blink, delays are in milliseconds
         * and if both are zero then a sensible default should be chosen.
         * The call should adjust the timings in that case and if it can't
         * match the values specified exactly.
         * Deactivate blinking again when the brightness is set to LED_OFF
         * via the brightness_set() callback.
         * For led_blink_set_nosleep() the LED core assumes that blink_set
         * implementations, of drivers which do not use brightness_set_blocking,
         * will not sleep. Therefor if brightness_set_blocking is not set
         * this function must not sleep!
         */
        int             (*blink_set)(struct led_classdev *led_cdev,
                                     unsigned long *delay_on,
                                     unsigned long *delay_off);

        int (*pattern_set)(struct led_classdev *led_cdev,
                           struct led_pattern *pattern, u32 len, int repeat);
        int (*pattern_clear)(struct led_classdev *led_cdev);

        struct device           *dev;
        const struct attribute_group    **groups;

        struct list_head         node;                  /* LED Device list */
        const char              *default_trigger;       /* Trigger to use */

        unsigned long            blink_delay_on, blink_delay_off;
        struct timer_list        blink_timer;
        int                      blink_brightness;
        int                      new_blink_brightness;
        void                    (*flash_resume)(struct led_classdev *led_cdev);

        struct workqueue_struct *wq;                    /* LED workqueue */
        struct work_struct      set_brightness_work;
        int                     delayed_set_value;
        unsigned long           delayed_delay_on;
        unsigned long           delayed_delay_off;

#ifdef CONFIG_LEDS_TRIGGERS
        /* Protects the trigger data below */
        struct rw_semaphore      trigger_lock;

        struct led_trigger      *trigger;
        struct list_head         trig_list;
        void                    *trigger_data;
        /* true if activated - deactivate routine uses it to do cleanup */
        bool                    activated;

        /* LEDs that have private triggers have this set */
        struct led_hw_trigger_type      *trigger_type;

        /* Unique trigger name supported by LED set in hw control mode */
        const char              *hw_control_trigger;
        /*
         * Check if the LED driver supports the requested mode provided by the
         * defined supported trigger to setup the LED to hw control mode.
         *
         * Return 0 on success. Return -EOPNOTSUPP when the passed flags are not
         * supported and software fallback needs to be used.
         * Return a negative error number on any other case  for check fail due
         * to various reason like device not ready or timeouts.
         */
        int                     (*hw_control_is_supported)(struct led_classdev *led_cdev,
                                                           unsigned long flags);
        /*
         * Activate hardware control, LED driver will use the provided flags
         * from the supported trigger and setup the LED to be driven by hardware
         * following the requested mode from the trigger flags.
         * Deactivate hardware blink control by setting brightness to LED_OFF via
         * the brightness_set() callback.
         *
         * Return 0 on success, a negative error number on flags apply fail.
         */
        int                     (*hw_control_set)(struct led_classdev *led_cdev,
                                                  unsigned long flags);
        /*
         * Get from the LED driver the current mode that the LED is set in hw
         * control mode and put them in flags.
         * Trigger can use this to get the initial state of a LED already set in
         * hardware blink control.
         *
         * Return 0 on success, a negative error number on failing parsing the
         * initial mode. Error from this function is NOT FATAL as the device
         * may be in a not supported initial state by the attached LED trigger.
         */
        int                     (*hw_control_get)(struct led_classdev *led_cdev,
                                                  unsigned long *flags);
        /*
         * Get the device this LED blinks in response to.
         * e.g. for a PHY LED, it is the network device. If the LED is
         * not yet associated to a device, return NULL.
         */
        struct device           *(*hw_control_get_device)(struct led_classdev *led_cdev);
#endif

#ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED
        int                      brightness_hw_changed;
        struct kernfs_node      *brightness_hw_changed_kn;
#endif

        /* Ensures consistent access to the LED class device */
        struct mutex            led_access;
};

/**
 * led_classdev_register_ext - register a new object of LED class with
 *                             init data
 * @parent: LED controller device this LED is driven by
 * @led_cdev: the led_classdev structure for this device
 * @init_data: the LED class device initialization data
 *
 * Register a new object of LED class, with name derived from init_data.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_classdev_register_ext(struct device *parent,
                                     struct led_classdev *led_cdev,
                                     struct led_init_data *init_data);

/**
 * led_classdev_register - register a new object of LED class
 * @parent: LED controller device this LED is driven by
 * @led_cdev: the led_classdev structure for this device
 *
 * Register a new object of LED class, with name derived from the name property
 * of passed led_cdev argument.
 *
 * Returns: 0 on success or negative error value on failure
 */
static inline int led_classdev_register(struct device *parent,
                                        struct led_classdev *led_cdev)
{
        return led_classdev_register_ext(parent, led_cdev, NULL);
}

int devm_led_classdev_register_ext(struct device *parent,
                                          struct led_classdev *led_cdev,
                                          struct led_init_data *init_data);
static inline int devm_led_classdev_register(struct device *parent,
                                             struct led_classdev *led_cdev)
{
        return devm_led_classdev_register_ext(parent, led_cdev, NULL);
}
void led_classdev_unregister(struct led_classdev *led_cdev);
void devm_led_classdev_unregister(struct device *parent,
                                  struct led_classdev *led_cdev);
void led_classdev_suspend(struct led_classdev *led_cdev);
void led_classdev_resume(struct led_classdev *led_cdev);

void led_add_lookup(struct led_lookup_data *led_lookup);
void led_remove_lookup(struct led_lookup_data *led_lookup);

struct led_classdev *__must_check led_get(struct device *dev, char *con_id);
struct led_classdev *__must_check devm_led_get(struct device *dev, char *con_id);

extern void led_put(struct led_classdev *led_cdev);
struct led_classdev *__must_check devm_of_led_get(struct device *dev,
                                                  int index);
struct led_classdev *__must_check devm_of_led_get_optional(struct device *dev,
                                                  int index);

/**
 * led_blink_set - set blinking with software fallback
 * @led_cdev: the LED to start blinking
 * @delay_on: the time it should be on (in ms)
 * @delay_off: the time it should ble off (in ms)
 *
 * This function makes the LED blink, attempting to use the
 * hardware acceleration if possible, but falling back to
 * software blinking if there is no hardware blinking or if
 * the LED refuses the passed values.
 *
 * This function may sleep!
 *
 * Note that if software blinking is active, simply calling
 * led_cdev->brightness_set() will not stop the blinking,
 * use led_set_brightness() instead.
 */
void led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
                   unsigned long *delay_off);

/**
 * led_blink_set_nosleep - set blinking, guaranteed to not sleep
 * @led_cdev: the LED to start blinking
 * @delay_on: the time it should be on (in ms)
 * @delay_off: the time it should ble off (in ms)
 *
 * This function makes the LED blink and is guaranteed to not sleep. Otherwise
 * this is the same as led_blink_set(), see led_blink_set() for details.
 */
void led_blink_set_nosleep(struct led_classdev *led_cdev, unsigned long delay_on,
                           unsigned long delay_off);

/**
 * led_blink_set_oneshot - do a oneshot software blink
 * @led_cdev: the LED to start blinking
 * @delay_on: the time it should be on (in ms)
 * @delay_off: the time it should ble off (in ms)
 * @invert: blink off, then on, leaving the led on
 *
 * This function makes the LED blink one time for delay_on +
 * delay_off time, ignoring the request if another one-shot
 * blink is already in progress.
 *
 * If invert is set, led blinks for delay_off first, then for
 * delay_on and leave the led on after the on-off cycle.
 *
 * This function is guaranteed not to sleep.
 */
void led_blink_set_oneshot(struct led_classdev *led_cdev,
                           unsigned long *delay_on, unsigned long *delay_off,
                           int invert);
/**
 * led_set_brightness - set LED brightness
 * @led_cdev: the LED to set
 * @brightness: the brightness to set it to
 *
 * Set an LED's brightness, and, if necessary, cancel the
 * software blink timer that implements blinking when the
 * hardware doesn't. This function is guaranteed not to sleep.
 */
void led_set_brightness(struct led_classdev *led_cdev, unsigned int brightness);

/**
 * led_set_brightness_sync - set LED brightness synchronously
 * @led_cdev: the LED to set
 * @value: the brightness to set it to
 *
 * Set an LED's brightness immediately. This function will block
 * the caller for the time required for accessing device registers,
 * and it can sleep.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_set_brightness_sync(struct led_classdev *led_cdev, unsigned int value);

/**
 * led_mc_set_brightness - set mc LED color intensity values and brightness
 * @led_cdev: the LED to set
 * @intensity_value: array of per color intensity values to set
 * @num_colors: amount of entries in intensity_value array
 * @brightness: the brightness to set the LED to
 *
 * Set a multi-color LED's per color intensity values and brightness.
 * If necessary, this cancels the software blink timer. This function is
 * guaranteed not to sleep.
 *
 * Calling this function on a non multi-color led_classdev or with the wrong
 * num_colors value is an error. In this case an error will be logged once
 * and the call will do nothing.
 */
void led_mc_set_brightness(struct led_classdev *led_cdev,
                           unsigned int *intensity_value, unsigned int num_colors,
                           unsigned int brightness);

/**
 * led_update_brightness - update LED brightness
 * @led_cdev: the LED to query
 *
 * Get an LED's current brightness and update led_cdev->brightness
 * member with the obtained value.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_update_brightness(struct led_classdev *led_cdev);

/**
 * led_get_default_pattern - return default pattern
 *
 * @led_cdev: the LED to get default pattern for
 * @size:     pointer for storing the number of elements in returned array,
 *            modified only if return != NULL
 *
 * Return:    Allocated array of integers with default pattern from device tree
 *            or NULL.  Caller is responsible for kfree().
 */
u32 *led_get_default_pattern(struct led_classdev *led_cdev, unsigned int *size);

/**
 * led_sysfs_disable - disable LED sysfs interface
 * @led_cdev: the LED to set
 *
 * Disable the led_cdev's sysfs interface.
 */
void led_sysfs_disable(struct led_classdev *led_cdev);

/**
 * led_sysfs_enable - enable LED sysfs interface
 * @led_cdev: the LED to set
 *
 * Enable the led_cdev's sysfs interface.
 */
void led_sysfs_enable(struct led_classdev *led_cdev);

/**
 * led_compose_name - compose LED class device name
 * @dev: LED controller device object
 * @init_data: the LED class device initialization data
 * @led_classdev_name: composed LED class device name
 *
 * Create LED class device name basing on the provided init_data argument.
 * The name can have <devicename:color:function> or <color:function>.
 * form, depending on the init_data configuration.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_compose_name(struct device *dev, struct led_init_data *init_data,
                     char *led_classdev_name);

/**
 * led_get_color_name - get string representation of color ID
 * @color_id: The LED_COLOR_ID_* constant
 *
 * Get the string name of a LED_COLOR_ID_* constant.
 *
 * Returns: A string constant or NULL on an invalid ID.
 */
const char *led_get_color_name(u8 color_id);

/**
 * led_sysfs_is_disabled - check if LED sysfs interface is disabled
 * @led_cdev: the LED to query
 *
 * Returns: true if the led_cdev's sysfs interface is disabled.
 */
static inline bool led_sysfs_is_disabled(struct led_classdev *led_cdev)
{
        return led_cdev->flags & LED_SYSFS_DISABLE;
}

/*
 * LED Triggers
 */
/* Registration functions for simple triggers */
#define DEFINE_LED_TRIGGER(x)           static struct led_trigger *x;
#define DEFINE_LED_TRIGGER_GLOBAL(x)    struct led_trigger *x;

#ifdef CONFIG_LEDS_TRIGGERS

#define TRIG_NAME_MAX 50

struct led_trigger {
        /* Trigger Properties */
        const char       *name;
        int             (*activate)(struct led_classdev *led_cdev);
        void            (*deactivate)(struct led_classdev *led_cdev);

        /* Brightness set by led_trigger_event */
        enum led_brightness brightness;

        /* LED-private triggers have this set */
        struct led_hw_trigger_type *trigger_type;

        /* LEDs under control by this trigger (for simple triggers) */
        spinlock_t        leddev_list_lock;
        struct list_head  led_cdevs;

        /* Link to next registered trigger */
        struct list_head  next_trig;

        const struct attribute_group **groups;
};

/*
 * Currently the attributes in struct led_trigger::groups are added directly to
 * the LED device. As this might change in the future, the following
 * macros abstract getting the LED device and its trigger_data from the dev
 * parameter passed to the attribute accessor functions.
 */
#define led_trigger_get_led(dev)        ((struct led_classdev *)dev_get_drvdata((dev)))
#define led_trigger_get_drvdata(dev)    (led_get_trigger_data(led_trigger_get_led(dev)))

/* Registration functions for complex triggers */
int led_trigger_register(struct led_trigger *trigger);
void led_trigger_unregister(struct led_trigger *trigger);
int devm_led_trigger_register(struct device *dev,
                                     struct led_trigger *trigger);

void led_trigger_register_simple(const char *name,
                                struct led_trigger **trigger);
void led_trigger_unregister_simple(struct led_trigger *trigger);
void led_trigger_event(struct led_trigger *trigger,  enum led_brightness event);
void led_mc_trigger_event(struct led_trigger *trig,
                          unsigned int *intensity_value, unsigned int num_colors,
                          enum led_brightness brightness);
void led_trigger_blink(struct led_trigger *trigger, unsigned long delay_on,
                       unsigned long delay_off);
void led_trigger_blink_oneshot(struct led_trigger *trigger,
                               unsigned long delay_on,
                               unsigned long delay_off,
                               int invert);
void led_trigger_set_default(struct led_classdev *led_cdev);
int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger);
void led_trigger_remove(struct led_classdev *led_cdev);

static inline void led_set_trigger_data(struct led_classdev *led_cdev,
                                        void *trigger_data)
{
        led_cdev->trigger_data = trigger_data;
}

static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
{
        return led_cdev->trigger_data;
}

static inline enum led_brightness
led_trigger_get_brightness(const struct led_trigger *trigger)
{
        return trigger ? trigger->brightness : LED_OFF;
}

#define module_led_trigger(__led_trigger) \
        module_driver(__led_trigger, led_trigger_register, \
                      led_trigger_unregister)

#else

/* Trigger has no members */
struct led_trigger {};

/* Trigger inline empty functions */
static inline void led_trigger_register_simple(const char *name,
                                        struct led_trigger **trigger) {}
static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {}
static inline void led_trigger_event(struct led_trigger *trigger,
                                enum led_brightness event) {}
static inline void led_mc_trigger_event(struct led_trigger *trig,
                                unsigned int *intensity_value, unsigned int num_colors,
                                enum led_brightness brightness) {}
static inline void led_trigger_blink(struct led_trigger *trigger,
                                      unsigned long delay_on,
                                      unsigned long delay_off) {}
static inline void led_trigger_blink_oneshot(struct led_trigger *trigger,
                                      unsigned long delay_on,
                                      unsigned long delay_off,
                                      int invert) {}
static inline void led_trigger_set_default(struct led_classdev *led_cdev) {}
static inline int led_trigger_set(struct led_classdev *led_cdev,
                                  struct led_trigger *trigger)
{
        return 0;
}

static inline void led_trigger_remove(struct led_classdev *led_cdev) {}
static inline void led_set_trigger_data(struct led_classdev *led_cdev) {}
static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
{
        return NULL;
}

static inline enum led_brightness
led_trigger_get_brightness(const struct led_trigger *trigger)
{
        return LED_OFF;
}

#endif /* CONFIG_LEDS_TRIGGERS */

/* Trigger specific enum */
enum led_trigger_netdev_modes {
        TRIGGER_NETDEV_LINK = 0,
        TRIGGER_NETDEV_LINK_10,
        TRIGGER_NETDEV_LINK_100,
        TRIGGER_NETDEV_LINK_1000,
        TRIGGER_NETDEV_LINK_2500,
        TRIGGER_NETDEV_LINK_5000,
        TRIGGER_NETDEV_LINK_10000,
        TRIGGER_NETDEV_HALF_DUPLEX,
        TRIGGER_NETDEV_FULL_DUPLEX,
        TRIGGER_NETDEV_TX,
        TRIGGER_NETDEV_RX,
        TRIGGER_NETDEV_TX_ERR,
        TRIGGER_NETDEV_RX_ERR,

        /* Keep last */
        __TRIGGER_NETDEV_MAX,
};

/* Trigger specific functions */
#ifdef CONFIG_LEDS_TRIGGER_DISK
void ledtrig_disk_activity(bool write);
#else
static inline void ledtrig_disk_activity(bool write) {}
#endif

#ifdef CONFIG_LEDS_TRIGGER_MTD
void ledtrig_mtd_activity(void);
#else
static inline void ledtrig_mtd_activity(void) {}
#endif

#if defined(CONFIG_LEDS_TRIGGER_CAMERA) || defined(CONFIG_LEDS_TRIGGER_CAMERA_MODULE)
void ledtrig_flash_ctrl(bool on);
void ledtrig_torch_ctrl(bool on);
#else
static inline void ledtrig_flash_ctrl(bool on) {}
static inline void ledtrig_torch_ctrl(bool on) {}
#endif

#if IS_REACHABLE(CONFIG_LEDS_TRIGGER_BACKLIGHT)
void ledtrig_backlight_blank(bool blank);
#else
static inline void ledtrig_backlight_blank(bool blank) {}
#endif

/*
 * Generic LED platform data for describing LED names and default triggers.
 */
struct led_info {
        const char      *name;
        const char      *default_trigger;
        int             flags;
};

struct led_platform_data {
        int             num_leds;
        struct led_info *leds;
};

struct led_properties {
        u32             color;
        bool            color_present;
        const char      *function;
        u32             func_enum;
        bool            func_enum_present;
        const char      *label;
};

typedef int (*gpio_blink_set_t)(struct gpio_desc *desc, int state,
                                unsigned long *delay_on,
                                unsigned long *delay_off);

/* For the leds-gpio driver */
struct gpio_led {
        const char *name;
        const char *default_trigger;
        unsigned        gpio;
        unsigned        active_low : 1;
        unsigned        retain_state_suspended : 1;
        unsigned        panic_indicator : 1;
        unsigned        default_state : 2;
        unsigned        retain_state_shutdown : 1;
        /* default_state should be one of LEDS_GPIO_DEFSTATE_(ON|OFF|KEEP) */
        struct gpio_desc *gpiod;
};
#define LEDS_GPIO_DEFSTATE_OFF          LEDS_DEFSTATE_OFF
#define LEDS_GPIO_DEFSTATE_ON           LEDS_DEFSTATE_ON
#define LEDS_GPIO_DEFSTATE_KEEP         LEDS_DEFSTATE_KEEP

struct gpio_led_platform_data {
        int             num_leds;
        const struct gpio_led *leds;

#define GPIO_LED_NO_BLINK_LOW   0       /* No blink GPIO state low */
#define GPIO_LED_NO_BLINK_HIGH  1       /* No blink GPIO state high */
#define GPIO_LED_BLINK          2       /* Please, blink */
        gpio_blink_set_t        gpio_blink_set;
};

#ifdef CONFIG_LEDS_GPIO_REGISTER
struct platform_device *gpio_led_register_device(
                int id, const struct gpio_led_platform_data *pdata);
#else
static inline struct platform_device *gpio_led_register_device(
                int id, const struct gpio_led_platform_data *pdata)
{
        return 0;
}
#endif

enum cpu_led_event {
        CPU_LED_IDLE_START,     /* CPU enters idle */
        CPU_LED_IDLE_END,       /* CPU idle ends */
        CPU_LED_START,          /* Machine starts, especially resume */
        CPU_LED_STOP,           /* Machine stops, especially suspend */
        CPU_LED_HALTED,         /* Machine shutdown */
};
#ifdef CONFIG_LEDS_TRIGGER_CPU
void ledtrig_cpu(enum cpu_led_event evt);
#else
static inline void ledtrig_cpu(enum cpu_led_event evt)
{
        return;
}
#endif

#ifdef CONFIG_LEDS_BRIGHTNESS_HW_CHANGED
void led_classdev_notify_brightness_hw_changed(
        struct led_classdev *led_cdev, unsigned int brightness);
#else
static inline void led_classdev_notify_brightness_hw_changed(
        struct led_classdev *led_cdev, enum led_brightness brightness) { }
#endif

/**
 * struct led_pattern - pattern interval settings
 * @delta_t: pattern interval delay, in milliseconds
 * @brightness: pattern interval brightness
 */
struct led_pattern {
        u32 delta_t;
        int brightness;
};

enum led_audio {
        LED_AUDIO_MUTE,         /* master mute LED */
        LED_AUDIO_MICMUTE,      /* mic mute LED */
        NUM_AUDIO_LEDS
};

#endif          /* __LINUX_LEDS_H_INCLUDED */