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
70enum lp855x_chip_id {
71 LP8550,
72 LP8551,
73 LP8552,
74 LP8553,
75 LP8555,
76 LP8556,
77 LP8557,
78};
79
80enum lp8550_brighntess_source {
81 LP8550_PWM_ONLY,
82 LP8550_I2C_ONLY = 2,
83};
84
85enum lp8551_brighntess_source {
86 LP8551_PWM_ONLY = LP8550_PWM_ONLY,
87 LP8551_I2C_ONLY = LP8550_I2C_ONLY,
88};
89
90enum lp8552_brighntess_source {
91 LP8552_PWM_ONLY = LP8550_PWM_ONLY,
92 LP8552_I2C_ONLY = LP8550_I2C_ONLY,
93};
94
95enum lp8553_brighntess_source {
96 LP8553_PWM_ONLY = LP8550_PWM_ONLY,
97 LP8553_I2C_ONLY = LP8550_I2C_ONLY,
98};
99
100enum 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
107enum 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
114enum 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
121struct lp855x_rom_data {
122 u8 addr;
123 u8 val;
124};
125
126/**
127 * struct lp855x_platform_data - lp855 platform-specific 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 */
136struct 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

source code of linux/include/linux/platform_data/lp855x.h