include/linux/platform_data/lp855x.h

   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 #define LP8556_FAST_CONFIG      BIT(7) /* use it if EPROMs should be maintained
  50                                           when exiting the low power mode */
  51
  52 /* CONFIG register - LP8557 */
  53 #define LP8557_PWM_STANDBY      BIT(7)
  54 #define LP8557_PWM_FILTER       BIT(6)
  55 #define LP8557_RELOAD_EPROM     BIT(3)  /* use it if EPROMs should be reset
  56                                            when the backlight turns on */
  57 #define LP8557_OFF_OPENLEDS     BIT(2)
  58 #define LP8557_PWM_CONFIG       LP8557_PWM_ONLY
  59 #define LP8557_I2C_CONFIG       LP8557_I2C_ONLY
  60 #define LP8557_COMB1_CONFIG     LP8557_COMBINED1
  61 #define LP8557_COMB2_CONFIG     LP8557_COMBINED2
  62
  63 enum lp855x_chip_id {
  64         LP8550,
  65         LP8551,
  66         LP8552,
  67         LP8553,
  68         LP8556,
  69         LP8557,
  70 };
  71
  72 enum lp8550_brighntess_source {
  73         LP8550_PWM_ONLY,
  74         LP8550_I2C_ONLY = 2,
  75 };
  76
  77 enum lp8551_brighntess_source {
  78         LP8551_PWM_ONLY = LP8550_PWM_ONLY,
  79         LP8551_I2C_ONLY = LP8550_I2C_ONLY,
  80 };
  81
  82 enum lp8552_brighntess_source {
  83         LP8552_PWM_ONLY = LP8550_PWM_ONLY,
  84         LP8552_I2C_ONLY = LP8550_I2C_ONLY,
  85 };
  86
  87 enum lp8553_brighntess_source {
  88         LP8553_PWM_ONLY = LP8550_PWM_ONLY,
  89         LP8553_I2C_ONLY = LP8550_I2C_ONLY,
  90 };
  91
  92 enum lp8556_brightness_source {
  93         LP8556_PWM_ONLY,
  94         LP8556_COMBINED1,       /* pwm + i2c before the shaper block */
  95         LP8556_I2C_ONLY,
  96         LP8556_COMBINED2,       /* pwm + i2c after the shaper block */
  97 };
  98
  99 enum lp8557_brightness_source {
 100         LP8557_PWM_ONLY,
 101         LP8557_I2C_ONLY,
 102         LP8557_COMBINED1,       /* pwm + i2c after the shaper block */
 103         LP8557_COMBINED2,       /* pwm + i2c before the shaper block */
 104 };
 105
 106 struct lp855x_rom_data {
 107         u8 addr;
 108         u8 val;
 109 };
 110
 111 /**
 112  * struct lp855x_platform_data
 113  * @name : Backlight driver name. If it is not defined, default name is set.
 114  * @device_control : value of DEVICE CONTROL register
 115  * @initial_brightness : initial value of backlight brightness
 116  * @period_ns : platform specific pwm period value. unit is nano.
 117                 Only valid when mode is PWM_BASED.
 118  * @size_program : total size of lp855x_rom_data
 119  * @rom_data : list of new eeprom/eprom registers
 120  */
 121 struct lp855x_platform_data {
 122         const char *name;
 123         u8 device_control;
 124         u8 initial_brightness;
 125         unsigned int period_ns;
 126         int size_program;
 127         struct lp855x_rom_data *rom_data;
 128 };
 129
 130 #endif