1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/*
* LED Flash class interface
*
* 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 __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 (1 << 0)
#define LED_FAULT_TIMEOUT (1 << 1)
#define LED_FAULT_OVER_TEMPERATURE (1 << 2)
#define LED_FAULT_SHORT_CIRCUIT (1 << 3)
#define LED_FAULT_OVER_CURRENT (1 << 4)
#define LED_FAULT_INDICATOR (1 << 5)
#define LED_FAULT_UNDER_VOLTAGE (1 << 6)
#define LED_FAULT_INPUT_VOLTAGE (1 << 7)
#define LED_FAULT_LED_OVER_TEMPERATURE (1 << 8)
#define LED_NUM_FLASH_FAULTS 9
#define LED_FLASH_SYSFS_GROUPS_SIZE 5
struct led_flash_ops {
/* set flash brightness */
int (*flash_brightness_set)(struct led_classdev_flash *fled_cdev,
u32 brightness);
/* get flash brightness */
int (*flash_brightness_get)(struct led_classdev_flash *fled_cdev,
u32 *brightness);
/* set flash strobe state */
int (*strobe_set)(struct led_classdev_flash *fled_cdev, bool state);
/* get flash strobe state */
int (*strobe_get)(struct led_classdev_flash *fled_cdev, bool *state);
/* set flash timeout */
int (*timeout_set)(struct led_classdev_flash *fled_cdev, u32 timeout);
/* get the flash LED fault */
int (*fault_get)(struct led_classdev_flash *fled_cdev, u32 *fault);
};
/*
* Current value of a flash setting along
* with its constraints.
*/
struct led_flash_setting {
/* maximum allowed value */
u32 min;
/* maximum allowed value */
u32 max;
/* step value */
u32 step;
/* current value */
u32 val;
};
struct led_classdev_flash {
/* led class device */
struct led_classdev led_cdev;
/* flash led specific ops */
const struct led_flash_ops *ops;
/* flash brightness value in microamperes along with its constraints */
struct led_flash_setting brightness;
/* flash timeout value in microseconds along with its constraints */
struct led_flash_setting timeout;
/* LED Flash class sysfs groups */
const struct attribute_group *sysfs_groups[LED_FLASH_SYSFS_GROUPS_SIZE];
};
static inline struct led_classdev_flash *lcdev_to_flcdev(
struct led_classdev *lcdev)
{
return container_of(lcdev, struct led_classdev_flash, led_cdev);
}
/**
* led_classdev_flash_register - register a new object of led_classdev class
* with support for flash LEDs
* @parent: the flash LED to register
* @fled_cdev: the led_classdev_flash structure for this device
*
* Returns: 0 on success or negative error value on failure
*/
extern int led_classdev_flash_register(struct device *parent,
struct led_classdev_flash *fled_cdev);
/**
* 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
*/
extern void led_classdev_flash_unregister(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)
{
if (!fled_cdev)
return -EINVAL;
return fled_cdev->ops->strobe_set(fled_cdev, 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)
{
if (!fled_cdev)
return -EINVAL;
if (fled_cdev->ops->strobe_get)
return fled_cdev->ops->strobe_get(fled_cdev, state);
return -EINVAL;
}
/**
* 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
*/
extern 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
*/
extern 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
*/
extern 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
*/
extern int led_get_flash_fault(struct led_classdev_flash *fled_cdev,
u32 *fault);
#endif /* __LINUX_FLASH_LEDS_H_INCLUDED */
|
