summaryrefslogtreecommitdiffstats
path: root/include/linux/platform_data/lp855x.h
blob: 761f31752367c46bc61b1715ecb019e963663043 (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
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
/*
 * LP855x Backlight Driver
 *
 *			Copyright (C) 2011 Texas Instruments
 *
 * 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 _LP855X_H
#define _LP855X_H

#define BL_CTL_SHFT	(0)
#define BRT_MODE_SHFT	(1)
#define BRT_MODE_MASK	(0x06)

/* Enable backlight. Only valid when BRT_MODE=10(I2C only) */
#define ENABLE_BL	(1)
#define DISABLE_BL	(0)

#define I2C_CONFIG(id)	id ## _I2C_CONFIG
#define PWM_CONFIG(id)	id ## _PWM_CONFIG

/* DEVICE CONTROL register - LP8550 */
#define LP8550_PWM_CONFIG	(LP8550_PWM_ONLY << BRT_MODE_SHFT)
#define LP8550_I2C_CONFIG	((ENABLE_BL << BL_CTL_SHFT) | \
				(LP8550_I2C_ONLY << BRT_MODE_SHFT))

/* DEVICE CONTROL register - LP8551 */
#define LP8551_PWM_CONFIG	LP8550_PWM_CONFIG
#define LP8551_I2C_CONFIG	LP8550_I2C_CONFIG

/* DEVICE CONTROL register - LP8552 */
#define LP8552_PWM_CONFIG	LP8550_PWM_CONFIG
#define LP8552_I2C_CONFIG	LP8550_I2C_CONFIG

/* DEVICE CONTROL register - LP8553 */
#define LP8553_PWM_CONFIG	LP8550_PWM_CONFIG
#define LP8553_I2C_CONFIG	LP8550_I2C_CONFIG

/* DEVICE CONTROL register - LP8556 */
#define LP8556_PWM_CONFIG	(LP8556_PWM_ONLY << BRT_MODE_SHFT)
#define LP8556_COMB1_CONFIG	(LP8556_COMBINED1 << BRT_MODE_SHFT)
#define LP8556_I2C_CONFIG	((ENABLE_BL << BL_CTL_SHFT) | \
				(LP8556_I2C_ONLY << BRT_MODE_SHFT))
#define LP8556_COMB2_CONFIG	(LP8556_COMBINED2 << BRT_MODE_SHFT)
#define LP8556_FAST_CONFIG	BIT(7) /* use it if EPROMs should be maintained
					  when exiting the low power mode */

enum lp855x_chip_id {
	LP8550,
	LP8551,
	LP8552,
	LP8553,
	LP8556,
};

enum lp855x_brightness_ctrl_mode {
	PWM_BASED = 1,
	REGISTER_BASED,
};

enum lp8550_brighntess_source {
	LP8550_PWM_ONLY,
	LP8550_I2C_ONLY = 2,
};

enum lp8551_brighntess_source {
	LP8551_PWM_ONLY = LP8550_PWM_ONLY,
	LP8551_I2C_ONLY = LP8550_I2C_ONLY,
};

enum lp8552_brighntess_source {
	LP8552_PWM_ONLY = LP8550_PWM_ONLY,
	LP8552_I2C_ONLY = LP8550_I2C_ONLY,
};

enum lp8553_brighntess_source {
	LP8553_PWM_ONLY = LP8550_PWM_ONLY,
	LP8553_I2C_ONLY = LP8550_I2C_ONLY,
};

enum lp8556_brightness_source {
	LP8556_PWM_ONLY,
	LP8556_COMBINED1,	/* pwm + i2c before the shaper block */
	LP8556_I2C_ONLY,
	LP8556_COMBINED2,	/* pwm + i2c after the shaper block */
};

struct lp855x_pwm_data {
	void (*pwm_set_intensity) (int brightness, int max_brightness);
	int (*pwm_get_intensity) (int max_brightness);
};

struct lp855x_rom_data {
	u8 addr;
	u8 val;
};

/**
 * struct lp855x_platform_data
 * @name : Backlight driver name. If it is not defined, default name is set.
 * @mode : brightness control by pwm or lp855x register
 * @device_control : value of DEVICE CONTROL register
 * @initial_brightness : initial value of backlight brightness
 * @pwm_data : platform specific pwm generation functions.
		Only valid when mode is PWM_BASED.
 * @load_new_rom_data :
	0 : use default configuration data
	1 : update values of eeprom or eprom registers on loading driver
 * @size_program : total size of lp855x_rom_data
 * @rom_data : list of new eeprom/eprom registers
 */
struct lp855x_platform_data {
	char *name;
	enum lp855x_brightness_ctrl_mode mode;
	u8 device_control;
	int initial_brightness;
	struct lp855x_pwm_data pwm_data;
	u8 load_new_rom_data;
	int size_program;
	struct lp855x_rom_data *rom_data;
};

#endif