blob: ffedc7723d846d5b62afb891e04aa77deab3f45c (
plain)
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
|
/*
* LP55XX Common Driver Header
*
* Copyright (C) 2012 Texas Instruments
*
* Author: Milo(Woogyom) Kim <milo.kim@ti.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.
*
* Derived from leds-lp5521.c, leds-lp5523.c
*/
#ifndef _LEDS_LP55XX_COMMON_H
#define _LEDS_LP55XX_COMMON_H
struct lp55xx_led;
struct lp55xx_chip;
/*
* struct lp55xx_reg
* @addr : Register address
* @val : Register value
*/
struct lp55xx_reg {
u8 addr;
u8 val;
};
/*
* struct lp55xx_device_config
* @reset : Chip specific reset command
* @enable : Chip specific enable command
* @post_init_device : Chip specific initialization code
*/
struct lp55xx_device_config {
const struct lp55xx_reg reset;
const struct lp55xx_reg enable;
/* define if the device has specific initialization process */
int (*post_init_device) (struct lp55xx_chip *chip);
};
/*
* struct lp55xx_chip
* @cl : I2C communication for access registers
* @pdata : Platform specific data
* @lock : Lock for user-space interface
* @num_leds : Number of registered LEDs
* @cfg : Device specific configuration data
*/
struct lp55xx_chip {
struct i2c_client *cl;
struct lp55xx_platform_data *pdata;
struct mutex lock; /* lock for user-space interface */
int num_leds;
struct lp55xx_device_config *cfg;
};
/*
* struct lp55xx_led
* @chan_nr : Channel number
* @cdev : LED class device
* @led_current : Current setting at each led channel
* @max_current : Maximun current at each led channel
* @brightness_work : Workqueue for brightness control
* @brightness : Brightness value
* @chip : The lp55xx chip data
*/
struct lp55xx_led {
int chan_nr;
struct led_classdev cdev;
u8 led_current;
u8 max_current;
struct work_struct brightness_work;
u8 brightness;
struct lp55xx_chip *chip;
};
/* register access */
extern int lp55xx_write(struct lp55xx_chip *chip, u8 reg, u8 val);
extern int lp55xx_read(struct lp55xx_chip *chip, u8 reg, u8 *val);
extern int lp55xx_update_bits(struct lp55xx_chip *chip, u8 reg,
u8 mask, u8 val);
/* common device init functions */
extern int lp55xx_init_device(struct lp55xx_chip *chip);
#endif /* _LEDS_LP55XX_COMMON_H */
|
