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/* include/linux/leds/flashlight.h
* Header of Flashlight Class Device Driver
*
* Copyright (C) 2013 Richtek Technology Corp.
* Patrick Chang <patrick_chang@richtek.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 LINUX_LEDS_FLASHLIGHT_H
#define LINUX_LEDS_FLASHLIGHT_H
#include <linux/device.h>
#include <linux/mutex.h>
typedef enum flashlight_type {
FLASHLIGHT_TYPE_XENON = 0,
FLASHLIGHT_TYPE_LED,
FLASHLIFHT_TYPE_BULB,
FLASHLIGHT_TYPE_MAX,
} flashlight_type_t;
typedef enum flashlight_mode {
FLASHLIGHT_MODE_OFF = 0,
FLASHLIGHT_MODE_TORCH,
FLASHLIGHT_MODE_FLASH,
/* MIXED mode means TORCH + FLASH */
FLASHLIGHT_MODE_MIXED,
FLASHLIGHT_MODE_MAX,
} flashlight_mode_t;
struct flashlight_device;
typedef int (*flashlight_charge_event_cb)(void *data, int remains);
struct flashlight_ops {
int (*set_torch_brightness)(struct flashlight_device *, int);
int (*set_strobe_brightness)(struct flashlight_device *, int);
int (*set_strobe_timeout)(struct flashlight_device *, int);
int (*list_strobe_timeout)(struct flashlight_device *, int);
int (*set_mode)(struct flashlight_device *, int);
int (*set_color_temperature)(struct flashlight_device *, int);
int (*list_color_temperature)(struct flashlight_device *, int);
int (*strobe_charge)(struct flashlight_device *,
flashlight_charge_event_cb, void *, int);
int (*strobe)(struct flashlight_device *);
int (*suspend)(struct flashlight_device *, pm_message_t);
int (*resume)(struct flashlight_device *);
};
struct flashlight_properties {
/* Flashlight type */
enum flashlight_type type;
/* Xenon type flashlight doesn't support torch mode */
enum flashlight_mode mode;
/* Color temperature, unit: K, 0 means unknown */
int color_temperature;
int torch_brightness;
int torch_max_brightness;
int strobe_brightness;
int strobe_max_brightness;
int strobe_delay;
int strobe_timeout;
const char *alias_name;
};
struct flashlight_device {
/* Flashlight properties */
struct flashlight_properties props;
const struct flashlight_ops *ops;
struct mutex ops_lock;
struct device dev;
};
extern struct flashlight_device *flashlight_device_register(const char *name,
struct device *parent, void *devdata, const struct flashlight_ops *ops,
const struct flashlight_properties *props);
extern void flashlight_device_unregister(struct flashlight_device *flashlight_dev);
extern struct flashlight_device *find_flashlight_by_name(char *name);
extern int flashlight_list_color_temperature(
struct flashlight_device *flashlight_dev,
int selector);
extern int flashlight_set_color_temperature(
struct flashlight_device *flashlight_dev,
int minK, int maxK);
extern int flashlight_set_torch_brightness(
struct flashlight_device *flashlight_dev,
int brightness_level);
extern int flashlight_set_strobe_brightness(
struct flashlight_device *flashlight_dev,
int brightness_level);
extern int flashlight_list_strobe_timeout(
struct flashlight_device *flashlight_dev,
int selector);
extern int flashlight_set_strobe_timeout(
struct flashlight_device *flashlight_dev,
int min_ms, int max_ms);
extern int flashlight_set_mode(struct flashlight_device *flashlight_dev,
int mode);
extern int flashlight_strobe(struct flashlight_device *flashlight_dev);
/* flashlight_charge_event_cb(void *data, int remains)
* description :
* callback function of flashlight charging progress
* arguments :
* @data : data pass by flashlight_strobe_charge()
* @remains : remained time to full chargerd, unit : ms ; 0 means ready
* return : 0 means succeess, otherwise see definitions in errno.h
*/
/* flashlight_strobe_chargestruct flashlight_device *flashlight_dev,
* flashlight_charge_event_cb cb, void *data, int start)
* description :
* flashlight start / stop charging
* @flashlight_dev : flashlight devices
* @flashlight_charge_event_cb : callback function to report progress
* @data : bypass to callback function
* @start : 1 means start; 0 means stop
*/
extern int flashlight_strobe_charge(struct flashlight_device *flashlight_dev,
flashlight_charge_event_cb cb, void *data, int start);
#define to_flashlight_device(obj) container_of(obj, struct flashlight_device, dev)
static inline void * flashlight_get_data(
struct flashlight_device *flashlight_dev)
{
return dev_get_drvdata(&flashlight_dev->dev);
}
#endif /*LINUX_LEDS_FLASHLIGHT_H*/
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