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     !€АО„ZџЕїС ?ч     !/* 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/kernfs.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/workqueue.h>

struct device;
struct led_pattern;
struct device_node;
/*
 * 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/* This is obsolete/useless.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_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;
};

struct led_hw_trigger_type {
	int dummy;
};

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

	/* 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,