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 /* CONFIG register - LP8555 */ 44 #define LP8555_PWM_STANDBY BIT(7) 45 #define LP8555_PWM_FILTER BIT(6) 46 #define LP8555_RELOAD_EPROM BIT(3) /* use it if EPROMs should be reset 47 when the backlight turns on */ 48 #define LP8555_OFF_OPENLEDS BIT(2) 49 #define LP8555_PWM_CONFIG LP8555_PWM_ONLY 50 #define LP8555_I2C_CONFIG LP8555_I2C_ONLY 51 #define LP8555_COMB1_CONFIG LP8555_COMBINED1 52 #define LP8555_COMB2_CONFIG LP8555_COMBINED2 53 54 /* DEVICE CONTROL register - LP8556 */ 55 #define LP8556_PWM_CONFIG (LP8556_PWM_ONLY << BRT_MODE_SHFT) 56 #define LP8556_COMB1_CONFIG (LP8556_COMBINED1 << BRT_MODE_SHFT) 57 #define LP8556_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \ 58 (LP8556_I2C_ONLY << BRT_MODE_SHFT)) 59 #define LP8556_COMB2_CONFIG (LP8556_COMBINED2 << BRT_MODE_SHFT) 60 #define LP8556_FAST_CONFIG BIT(7) /* use it if EPROMs should be maintained 61 when exiting the low power mode */ 62 63 /* CONFIG register - LP8557 */ 64 #define LP8557_PWM_STANDBY BIT(7) 65 #define LP8557_PWM_FILTER BIT(6) 66 #define LP8557_RELOAD_EPROM BIT(3) /* use it if EPROMs should be reset 67 when the backlight turns on */ 68 #define LP8557_OFF_OPENLEDS BIT(2) 69 #define LP8557_PWM_CONFIG LP8557_PWM_ONLY 70 #define LP8557_I2C_CONFIG LP8557_I2C_ONLY 71 #define LP8557_COMB1_CONFIG LP8557_COMBINED1 72 #define LP8557_COMB2_CONFIG LP8557_COMBINED2 73 74 enum lp855x_chip_id { 75 LP8550, 76 LP8551, 77 LP8552, 78 LP8553, 79 LP8555, 80 LP8556, 81 LP8557, 82 }; 83 84 enum lp8550_brighntess_source { 85 LP8550_PWM_ONLY, 86 LP8550_I2C_ONLY = 2, 87 }; 88 89 enum lp8551_brighntess_source { 90 LP8551_PWM_ONLY = LP8550_PWM_ONLY, 91 LP8551_I2C_ONLY = LP8550_I2C_ONLY, 92 }; 93 94 enum lp8552_brighntess_source { 95 LP8552_PWM_ONLY = LP8550_PWM_ONLY, 96 LP8552_I2C_ONLY = LP8550_I2C_ONLY, 97 }; 98 99 enum lp8553_brighntess_source { 100 LP8553_PWM_ONLY = LP8550_PWM_ONLY, 101 LP8553_I2C_ONLY = LP8550_I2C_ONLY, 102 }; 103 104 enum lp8555_brightness_source { 105 LP8555_PWM_ONLY, 106 LP8555_I2C_ONLY, 107 LP8555_COMBINED1, /* Brightness register with shaped PWM */ 108 LP8555_COMBINED2, /* PWM with shaped brightness register */ 109 }; 110 111 enum lp8556_brightness_source { 112 LP8556_PWM_ONLY, 113 LP8556_COMBINED1, /* pwm + i2c before the shaper block */ 114 LP8556_I2C_ONLY, 115 LP8556_COMBINED2, /* pwm + i2c after the shaper block */ 116 }; 117 118 enum lp8557_brightness_source { 119 LP8557_PWM_ONLY, 120 LP8557_I2C_ONLY, 121 LP8557_COMBINED1, /* pwm + i2c after the shaper block */ 122 LP8557_COMBINED2, /* pwm + i2c before the shaper block */ 123 }; 124 125 struct lp855x_rom_data { 126 u8 addr; 127 u8 val; 128 }; 129 130 /** 131 * struct lp855x_platform_data 132 * @name : Backlight driver name. If it is not defined, default name is set. 133 * @device_control : value of DEVICE CONTROL register 134 * @initial_brightness : initial value of backlight brightness 135 * @period_ns : platform specific pwm period value. unit is nano. 136 Only valid when mode is PWM_BASED. 137 * @size_program : total size of lp855x_rom_data 138 * @rom_data : list of new eeprom/eprom registers 139 */ 140 struct lp855x_platform_data { 141 const char *name; 142 u8 device_control; 143 u8 initial_brightness; 144 unsigned int period_ns; 145 int size_program; 146 struct lp855x_rom_data *rom_data; 147 }; 148 149 #endif 150