linux-imx

/*

 * V4L2 flash LED sub-device registration helpers.

 *

 *  Copyright (C) 2015 Samsung Electronics Co., Ltd

 *  Author: Jacek Anaszewski <j.anaszewski@samsung.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

​

#ifndef _V4L2_FLASH_H

#define _V4L2_FLASH_H

​

#include <media/v4l2-ctrls.h>

#include <media/v4l2-subdev.h>

​

struct led_classdev_flash;

struct led_classdev;

struct v4l2_flash;

enum led_brightness;

​

/**

 * struct v4l2_flash_ctrl_data - flash control initialization data, filled

 *              basing on the features declared by the LED flash

 *              class driver in the v4l2_flash_config

 * @config: initialization data for a control

 * @cid:    contains v4l2 flash control id if the config

 *      field was initialized, 0 otherwise

 */

struct v4l2_flash_ctrl_data {

    struct v4l2_ctrl_config config;

    u32 cid;

};

​

/**

 * struct v4l2_flash_ops - V4L2 flash operations

 *

 * @external_strobe_set: Setup strobing the flash by hardware pin state

 *  assertion.

 * @intensity_to_led_brightness: Convert intensity to brightness in a device

 *  specific manner

 * @led_brightness_to_intensity: convert brightness to intensity in a device

 *  specific manner.

 */

struct v4l2_flash_ops {

    int (*external_strobe_set)(struct v4l2_flash *v4l2_flash,

                    bool enable);

    enum led_brightness (*intensity_to_led_brightness)

        (struct v4l2_flash *v4l2_flash, s32 intensity);

    s32 (*led_brightness_to_intensity)

        (struct v4l2_flash *v4l2_flash, enum led_brightness);

};

​

/**

 * struct v4l2_flash_config - V4L2 Flash sub-device initialization data

 * @dev_name:           the name of the media entity,

 *              unique in the system

 * @intensity:          non-flash strobe constraints for the LED

 * @flash_faults:       bitmask of flash faults that the LED flash class

 *              device can report; corresponding LED_FAULT* bit

 *              definitions are available in the header file

 *              <linux/led-class-flash.h>