linux/include/linux/led-class-flash.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * LED Flash class interface
 *
 * Copyright (C) 2015 Samsung Electronics Co., Ltd.
 * Author: Jacek Anaszewski <[email protected]>
 */
#ifndef __LINUX_FLASH_LEDS_H_INCLUDED
#define __LINUX_FLASH_LEDS_H_INCLUDED

#include <linux/leds.h>

struct device_node;
struct led_classdev_flash;

/*
 * Supported led fault bits - must be kept in synch
 * with V4L2_FLASH_FAULT bits.
 */
#define LED_FAULT_OVER_VOLTAGE …
#define LED_FAULT_TIMEOUT …
#define LED_FAULT_OVER_TEMPERATURE …
#define LED_FAULT_SHORT_CIRCUIT …
#define LED_FAULT_OVER_CURRENT …
#define LED_FAULT_INDICATOR …
#define LED_FAULT_UNDER_VOLTAGE …
#define LED_FAULT_INPUT_VOLTAGE …
#define LED_FAULT_LED_OVER_TEMPERATURE …
#define LED_NUM_FLASH_FAULTS …

#define LED_FLASH_SYSFS_GROUPS_SIZE …

struct led_flash_ops { … };

/*
 * Current value of a flash setting along
 * with its constraints.
 */
struct led_flash_setting { … };

struct led_classdev_flash { … };

static inline struct led_classdev_flash *lcdev_to_flcdev(
						struct led_classdev *lcdev)
{ … }

/**
 * led_classdev_flash_register_ext - register a new object of LED class with
 *				     init data and with support for flash LEDs
 * @parent: LED flash controller device this flash LED is driven by
 * @fled_cdev: the led_classdev_flash structure for this device
 * @init_data: the LED class flash device initialization data
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_classdev_flash_register_ext(struct device *parent,
				    struct led_classdev_flash *fled_cdev,
				    struct led_init_data *init_data);

/**
 * led_classdev_flash_unregister - unregisters an object of led_classdev class
 *				   with support for flash LEDs
 * @fled_cdev: the flash LED to unregister
 *
 * Unregister a previously registered via led_classdev_flash_register object
 */
void led_classdev_flash_unregister(struct led_classdev_flash *fled_cdev);

int devm_led_classdev_flash_register_ext(struct device *parent,
				     struct led_classdev_flash *fled_cdev,
				     struct led_init_data *init_data);


void devm_led_classdev_flash_unregister(struct device *parent,
					struct led_classdev_flash *fled_cdev);

static inline int led_classdev_flash_register(struct device *parent,
					   struct led_classdev_flash *fled_cdev)
{ … }

static inline int devm_led_classdev_flash_register(struct device *parent,
				     struct led_classdev_flash *fled_cdev)
{ … }

/**
 * led_set_flash_strobe - setup flash strobe
 * @fled_cdev: the flash LED to set strobe on
 * @state: 1 - strobe flash, 0 - stop flash strobe
 *
 * Strobe the flash LED.
 *
 * Returns: 0 on success or negative error value on failure
 */
static inline int led_set_flash_strobe(struct led_classdev_flash *fled_cdev,
					bool state)
{ … }

/**
 * led_get_flash_strobe - get flash strobe status
 * @fled_cdev: the flash LED to query
 * @state: 1 - flash is strobing, 0 - flash is off
 *
 * Check whether the flash is strobing at the moment.
 *
 * Returns: 0 on success or negative error value on failure
 */
static inline int led_get_flash_strobe(struct led_classdev_flash *fled_cdev,
					bool *state)
{ … }

/**
 * led_set_flash_brightness - set flash LED brightness
 * @fled_cdev: the flash LED to set
 * @brightness: the brightness to set it to
 *
 * Set a flash LED's brightness.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_set_flash_brightness(struct led_classdev_flash *fled_cdev,
			     u32 brightness);

/**
 * led_update_flash_brightness - update flash LED brightness
 * @fled_cdev: the flash LED to query
 *
 * Get a flash LED's current brightness and update led_flash->brightness
 * member with the obtained value.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_update_flash_brightness(struct led_classdev_flash *fled_cdev);

/**
 * led_set_flash_timeout - set flash LED timeout
 * @fled_cdev: the flash LED to set
 * @timeout: the flash timeout to set it to
 *
 * Set the flash strobe duration.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_set_flash_timeout(struct led_classdev_flash *fled_cdev, u32 timeout);

/**
 * led_get_flash_fault - get the flash LED fault
 * @fled_cdev: the flash LED to query
 * @fault: bitmask containing flash faults
 *
 * Get the flash LED fault.
 *
 * Returns: 0 on success or negative error value on failure
 */
int led_get_flash_fault(struct led_classdev_flash *fled_cdev, u32 *fault);

#endif	/* __LINUX_FLASH_LEDS_H_INCLUDED */