1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
2 | /* |
3 | * LP855x Backlight Driver |
4 | * |
5 | * Copyright (C) 2011 Texas Instruments |
6 | */ |
7 | |
8 | #ifndef _LP855X_H |
9 | #define _LP855X_H |
10 | |
11 | #define BL_CTL_SHFT (0) |
12 | #define BRT_MODE_SHFT (1) |
13 | #define BRT_MODE_MASK (0x06) |
14 | |
15 | /* Enable backlight. Only valid when BRT_MODE=10(I2C only) */ |
16 | #define ENABLE_BL (1) |
17 | #define DISABLE_BL (0) |
18 | |
19 | #define I2C_CONFIG(id) id ## _I2C_CONFIG |
20 | #define PWM_CONFIG(id) id ## _PWM_CONFIG |
21 | |
22 | /* DEVICE CONTROL register - LP8550 */ |
23 | #define LP8550_PWM_CONFIG (LP8550_PWM_ONLY << BRT_MODE_SHFT) |
24 | #define LP8550_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \ |
25 | (LP8550_I2C_ONLY << BRT_MODE_SHFT)) |
26 | |
27 | /* DEVICE CONTROL register - LP8551 */ |
28 | #define LP8551_PWM_CONFIG LP8550_PWM_CONFIG |
29 | #define LP8551_I2C_CONFIG LP8550_I2C_CONFIG |
30 | |
31 | /* DEVICE CONTROL register - LP8552 */ |
32 | #define LP8552_PWM_CONFIG LP8550_PWM_CONFIG |
33 | #define LP8552_I2C_CONFIG LP8550_I2C_CONFIG |
34 | |
35 | /* DEVICE CONTROL register - LP8553 */ |
36 | #define LP8553_PWM_CONFIG LP8550_PWM_CONFIG |
37 | #define LP8553_I2C_CONFIG LP8550_I2C_CONFIG |
38 | |
39 | /* CONFIG register - LP8555 */ |
40 | #define LP8555_PWM_STANDBY BIT(7) |
41 | #define LP8555_PWM_FILTER BIT(6) |
42 | #define LP8555_RELOAD_EPROM BIT(3) /* use it if EPROMs should be reset |
43 | when the backlight turns on */ |
44 | #define LP8555_OFF_OPENLEDS BIT(2) |
45 | #define LP8555_PWM_CONFIG LP8555_PWM_ONLY |
46 | #define LP8555_I2C_CONFIG LP8555_I2C_ONLY |
47 | #define LP8555_COMB1_CONFIG LP8555_COMBINED1 |
48 | #define LP8555_COMB2_CONFIG LP8555_COMBINED2 |
49 | |
50 | /* DEVICE CONTROL register - LP8556 */ |
51 | #define LP8556_PWM_CONFIG (LP8556_PWM_ONLY << BRT_MODE_SHFT) |
52 | #define LP8556_COMB1_CONFIG (LP8556_COMBINED1 << BRT_MODE_SHFT) |
53 | #define LP8556_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \ |
54 | (LP8556_I2C_ONLY << BRT_MODE_SHFT)) |
55 | #define LP8556_COMB2_CONFIG (LP8556_COMBINED2 << BRT_MODE_SHFT) |
56 | #define LP8556_FAST_CONFIG BIT(7) /* use it if EPROMs should be maintained |
57 | when exiting the low power mode */ |
58 | |
59 | /* CONFIG register - LP8557 */ |
60 | #define LP8557_PWM_STANDBY BIT(7) |
61 | #define LP8557_PWM_FILTER BIT(6) |
62 | #define LP8557_RELOAD_EPROM BIT(3) /* use it if EPROMs should be reset |
63 | when the backlight turns on */ |
64 | #define LP8557_OFF_OPENLEDS BIT(2) |
65 | #define LP8557_PWM_CONFIG LP8557_PWM_ONLY |
66 | #define LP8557_I2C_CONFIG LP8557_I2C_ONLY |
67 | #define LP8557_COMB1_CONFIG LP8557_COMBINED1 |
68 | #define LP8557_COMB2_CONFIG LP8557_COMBINED2 |
69 | |
70 | enum lp855x_chip_id { |
71 | LP8550, |
72 | LP8551, |
73 | LP8552, |
74 | LP8553, |
75 | LP8555, |
76 | LP8556, |
77 | LP8557, |
78 | }; |
79 | |
80 | enum lp8550_brighntess_source { |
81 | LP8550_PWM_ONLY, |
82 | LP8550_I2C_ONLY = 2, |
83 | }; |
84 | |
85 | enum lp8551_brighntess_source { |
86 | LP8551_PWM_ONLY = LP8550_PWM_ONLY, |
87 | LP8551_I2C_ONLY = LP8550_I2C_ONLY, |
88 | }; |
89 | |
90 | enum lp8552_brighntess_source { |
91 | LP8552_PWM_ONLY = LP8550_PWM_ONLY, |
92 | LP8552_I2C_ONLY = LP8550_I2C_ONLY, |
93 | }; |
94 | |
95 | enum lp8553_brighntess_source { |
96 | LP8553_PWM_ONLY = LP8550_PWM_ONLY, |
97 | LP8553_I2C_ONLY = LP8550_I2C_ONLY, |
98 | }; |
99 | |
100 | enum lp8555_brightness_source { |
101 | LP8555_PWM_ONLY, |
102 | LP8555_I2C_ONLY, |
103 | LP8555_COMBINED1, /* Brightness register with shaped PWM */ |
104 | LP8555_COMBINED2, /* PWM with shaped brightness register */ |
105 | }; |
106 | |
107 | enum lp8556_brightness_source { |
108 | LP8556_PWM_ONLY, |
109 | LP8556_COMBINED1, /* pwm + i2c before the shaper block */ |
110 | LP8556_I2C_ONLY, |
111 | LP8556_COMBINED2, /* pwm + i2c after the shaper block */ |
112 | }; |
113 | |
114 | enum lp8557_brightness_source { |
115 | LP8557_PWM_ONLY, |
116 | LP8557_I2C_ONLY, |
117 | LP8557_COMBINED1, /* pwm + i2c after the shaper block */ |
118 | LP8557_COMBINED2, /* pwm + i2c before the shaper block */ |
119 | }; |
120 | |
121 | struct lp855x_rom_data { |
122 | u8 addr; |
123 | u8 val; |
124 | }; |
125 | |
126 | /** |
127 | * struct lp855x_platform_data |
128 | * @name : Backlight driver name. If it is not defined, default name is set. |
129 | * @device_control : value of DEVICE CONTROL register |
130 | * @initial_brightness : initial value of backlight brightness |
131 | * @period_ns : platform specific pwm period value. unit is nano. |
132 | Only valid when mode is PWM_BASED. |
133 | * @size_program : total size of lp855x_rom_data |
134 | * @rom_data : list of new eeprom/eprom registers |
135 | */ |
136 | struct lp855x_platform_data { |
137 | const char *name; |
138 | u8 device_control; |
139 | u8 initial_brightness; |
140 | unsigned int period_ns; |
141 | int size_program; |
142 | struct lp855x_rom_data *rom_data; |
143 | }; |
144 | |
145 | #endif |
146 | |