LXR linux/include/linux/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
  50/* ROM area boundary */
  51#define EEPROM_START    (0xA0)
  52#define EEPROM_END      (0xA7)
  53#define EPROM_START     (0xA0)
  54#define EPROM_END       (0xAF)
  55
  56enum lp855x_chip_id {
  57        LP8550,
  58        LP8551,
  59        LP8552,
  60        LP8553,
  61        LP8556,
  62};
  63
  64enum lp855x_brightness_ctrl_mode {
  65        PWM_BASED = 1,
  66        REGISTER_BASED,
  67};
  68
  69enum lp8550_brighntess_source {
  70        LP8550_PWM_ONLY,
  71        LP8550_I2C_ONLY = 2,
  72};
  73
  74enum lp8551_brighntess_source {
  75        LP8551_PWM_ONLY = LP8550_PWM_ONLY,
  76        LP8551_I2C_ONLY = LP8550_I2C_ONLY,
  77};
  78
  79enum lp8552_brighntess_source {
  80        LP8552_PWM_ONLY = LP8550_PWM_ONLY,
  81        LP8552_I2C_ONLY = LP8550_I2C_ONLY,
  82};
  83
  84enum lp8553_brighntess_source {
  85        LP8553_PWM_ONLY = LP8550_PWM_ONLY,
  86        LP8553_I2C_ONLY = LP8550_I2C_ONLY,
  87};
  88
  89enum lp8556_brightness_source {
  90        LP8556_PWM_ONLY,
  91        LP8556_COMBINED1,       /* pwm + i2c before the shaper block */
  92        LP8556_I2C_ONLY,
  93        LP8556_COMBINED2,       /* pwm + i2c after the shaper block */
  94};
  95
  96struct lp855x_pwm_data {
  97        void (*pwm_set_intensity) (int brightness, int max_brightness);
  98        int (*pwm_get_intensity) (int max_brightness);
  99};
 100
 101struct lp855x_rom_data {
 102        u8 addr;
 103        u8 val;
 104};
 105
 106/**
 107 * struct lp855x_platform_data
 108 * @name : Backlight driver name. If it is not defined, default name is set.
 109 * @mode : brightness control by pwm or lp855x register
 110 * @device_control : value of DEVICE CONTROL register
 111 * @initial_brightness : initial value of backlight brightness
 112 * @pwm_data : platform specific pwm generation functions.
 113                Only valid when mode is PWM_BASED.
 114 * @load_new_rom_data :
 115        0 : use default configuration data
 116        1 : update values of eeprom or eprom registers on loading driver
 117 * @size_program : total size of lp855x_rom_data
 118 * @rom_data : list of new eeprom/eprom registers
 119 */
 120struct lp855x_platform_data {
 121        char *name;
 122        enum lp855x_brightness_ctrl_mode mode;
 123        u8 device_control;
 124        int initial_brightness;
 125        struct lp855x_pwm_data pwm_data;
 126        u8 load_new_rom_data;
 127        int size_program;
 128        struct lp855x_rom_data *rom_data;
 129};
 130
 131#endif
 132