LXR linux/include/linux/platform

   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
  74enum lp855x_chip_id {
  75        LP8550,
  76        LP8551,
  77        LP8552,
  78        LP8553,
  79        LP8555,
  80        LP8556,
  81        LP8557,
  82};
  83
  84enum lp8550_brighntess_source {
  85        LP8550_PWM_ONLY,
  86        LP8550_I2C_ONLY = 2,
  87};
  88
  89enum lp8551_brighntess_source {
  90        LP8551_PWM_ONLY = LP8550_PWM_ONLY,
  91        LP8551_I2C_ONLY = LP8550_I2C_ONLY,
  92};
  93
  94enum lp8552_brighntess_source {
  95        LP8552_PWM_ONLY = LP8550_PWM_ONLY,
  96        LP8552_I2C_ONLY = LP8550_I2C_ONLY,
  97};
  98
  99enum lp8553_brighntess_source {
 100        LP8553_PWM_ONLY = LP8550_PWM_ONLY,
 101        LP8553_I2C_ONLY = LP8550_I2C_ONLY,
 102};
 103
 104enum 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
 111enum 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
 118enum 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
 125struct 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 * @supply : regulator that supplies 3V input
 140 */
 141struct lp855x_platform_data {
 142        const char *name;
 143        u8 device_control;
 144        u8 initial_brightness;
 145        unsigned int period_ns;
 146        int size_program;
 147        struct lp855x_rom_data *rom_data;
 148        struct regulator *supply;
 149};
 150
 151#endif
 152