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7be865ab KM |
1 | /* |
2 | * LP855x Backlight Driver | |
3 | * | |
4 | * Copyright (C) 2011 Texas Instruments | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | */ | |
11 | ||
12 | #ifndef _LP855X_H | |
13 | #define _LP855X_H | |
14 | ||
15 | #define BL_CTL_SHFT (0) | |
16 | #define BRT_MODE_SHFT (1) | |
17 | #define BRT_MODE_MASK (0x06) | |
18 | ||
19 | /* Enable backlight. Only valid when BRT_MODE=10(I2C only) */ | |
20 | #define ENABLE_BL (1) | |
21 | #define DISABLE_BL (0) | |
22 | ||
23 | #define I2C_CONFIG(id) id ## _I2C_CONFIG | |
24 | #define PWM_CONFIG(id) id ## _PWM_CONFIG | |
25 | ||
26 | /* DEVICE CONTROL register - LP8550 */ | |
27 | #define LP8550_PWM_CONFIG (LP8550_PWM_ONLY << BRT_MODE_SHFT) | |
28 | #define LP8550_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \ | |
29 | (LP8550_I2C_ONLY << BRT_MODE_SHFT)) | |
30 | ||
31 | /* DEVICE CONTROL register - LP8551 */ | |
32 | #define LP8551_PWM_CONFIG LP8550_PWM_CONFIG | |
33 | #define LP8551_I2C_CONFIG LP8550_I2C_CONFIG | |
34 | ||
35 | /* DEVICE CONTROL register - LP8552 */ | |
36 | #define LP8552_PWM_CONFIG LP8550_PWM_CONFIG | |
37 | #define LP8552_I2C_CONFIG LP8550_I2C_CONFIG | |
38 | ||
39 | /* DEVICE CONTROL register - LP8553 */ | |
40 | #define LP8553_PWM_CONFIG LP8550_PWM_CONFIG | |
41 | #define LP8553_I2C_CONFIG LP8550_I2C_CONFIG | |
42 | ||
43 | /* DEVICE CONTROL register - LP8556 */ | |
44 | #define LP8556_PWM_CONFIG (LP8556_PWM_ONLY << BRT_MODE_SHFT) | |
45 | #define LP8556_COMB1_CONFIG (LP8556_COMBINED1 << BRT_MODE_SHFT) | |
46 | #define LP8556_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \ | |
47 | (LP8556_I2C_ONLY << BRT_MODE_SHFT)) | |
48 | #define LP8556_COMB2_CONFIG (LP8556_COMBINED2 << BRT_MODE_SHFT) | |
49 | ||
50 | /* ROM area boundary */ | |
51 | #define EEPROM_START (0xA0) | |
52 | #define EEPROM_END (0xA7) | |
53 | #define EPROM_START (0xA0) | |
54 | #define EPROM_END (0xAF) | |
55 | ||
56 | enum lp855x_chip_id { | |
57 | LP8550, | |
58 | LP8551, | |
59 | LP8552, | |
60 | LP8553, | |
61 | LP8556, | |
62 | }; | |
63 | ||
64 | enum lp855x_brightness_ctrl_mode { | |
65 | PWM_BASED = 1, | |
66 | REGISTER_BASED, | |
67 | }; | |
68 | ||
69 | enum lp8550_brighntess_source { | |
70 | LP8550_PWM_ONLY, | |
71 | LP8550_I2C_ONLY = 2, | |
72 | }; | |
73 | ||
74 | enum lp8551_brighntess_source { | |
75 | LP8551_PWM_ONLY = LP8550_PWM_ONLY, | |
76 | LP8551_I2C_ONLY = LP8550_I2C_ONLY, | |
77 | }; | |
78 | ||
79 | enum lp8552_brighntess_source { | |
80 | LP8552_PWM_ONLY = LP8550_PWM_ONLY, | |
81 | LP8552_I2C_ONLY = LP8550_I2C_ONLY, | |
82 | }; | |
83 | ||
84 | enum lp8553_brighntess_source { | |
85 | LP8553_PWM_ONLY = LP8550_PWM_ONLY, | |
86 | LP8553_I2C_ONLY = LP8550_I2C_ONLY, | |
87 | }; | |
88 | ||
89 | enum lp8556_brightness_source { | |
90 | LP8556_PWM_ONLY, | |
91 | LP8556_COMBINED1, /* pwm + i2c before the shaper block */ | |
92 | LP8556_I2C_ONLY, | |
93 | LP8556_COMBINED2, /* pwm + i2c after the shaper block */ | |
94 | }; | |
95 | ||
96 | struct lp855x_pwm_data { | |
97 | void (*pwm_set_intensity) (int brightness, int max_brightness); | |
98 | int (*pwm_get_intensity) (int max_brightness); | |
99 | }; | |
100 | ||
101 | struct lp855x_rom_data { | |
102 | u8 addr; | |
103 | u8 val; | |
104 | }; | |
105 | ||
106 | /** | |
107 | * struct lp855x_platform_data | |
108 | * @name : Backlight driver name. If it is not defined, default name is set. | |
109 | * @mode : brightness control by pwm or lp855x register | |
110 | * @device_control : value of DEVICE CONTROL register | |
111 | * @initial_brightness : initial value of backlight brightness | |
112 | * @pwm_data : platform specific pwm generation functions. | |
113 | Only valid when mode is PWM_BASED. | |
114 | * @load_new_rom_data : | |
115 | 0 : use default configuration data | |
116 | 1 : update values of eeprom or eprom registers on loading driver | |
117 | * @size_program : total size of lp855x_rom_data | |
118 | * @rom_data : list of new eeprom/eprom registers | |
119 | */ | |
120 | struct lp855x_platform_data { | |
121 | char *name; | |
122 | enum lp855x_brightness_ctrl_mode mode; | |
123 | u8 device_control; | |
124 | int initial_brightness; | |
125 | struct lp855x_pwm_data pwm_data; | |
126 | u8 load_new_rom_data; | |
127 | int size_program; | |
128 | struct lp855x_rom_data *rom_data; | |
129 | }; | |
130 | ||
131 | #endif |