root/include/linux/platform_data/lp855x.h

/*
 * LP855x Backlight Driver
 *
 *                      Copyright (C) 2011 Texas Instruments
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#ifndef _LP855X_H
#define _LP855X_H

#define BL_CTL_SHFT     (0)
#define BRT_MODE_SHFT   (1)
#define BRT_MODE_MASK   (0x06)

/* Enable backlight. Only valid when BRT_MODE=10(I2C only) */
#define ENABLE_BL       (1)
#define DISABLE_BL      (0)

#define I2C_CONFIG(id)  id ## _I2C_CONFIG
#define PWM_CONFIG(id)  id ## _PWM_CONFIG

/* DEVICE CONTROL register - LP8550 */
#define LP8550_PWM_CONFIG       (LP8550_PWM_ONLY << BRT_MODE_SHFT)
#define LP8550_I2C_CONFIG       ((ENABLE_BL << BL_CTL_SHFT) | \
                                (LP8550_I2C_ONLY << BRT_MODE_SHFT))

/* DEVICE CONTROL register - LP8551 */
#define LP8551_PWM_CONFIG       LP8550_PWM_CONFIG
#define LP8551_I2C_CONFIG       LP8550_I2C_CONFIG

/* DEVICE CONTROL register - LP8552 */
#define LP8552_PWM_CONFIG       LP8550_PWM_CONFIG
#define LP8552_I2C_CONFIG       LP8550_I2C_CONFIG

/* DEVICE CONTROL register - LP8553 */
#define LP8553_PWM_CONFIG       LP8550_PWM_CONFIG
#define LP8553_I2C_CONFIG       LP8550_I2C_CONFIG

/* CONFIG register - LP8555 */
#define LP8555_PWM_STANDBY      BIT(7)
#define LP8555_PWM_FILTER       BIT(6)
#define LP8555_RELOAD_EPROM     BIT(3)  /* use it if EPROMs should be reset
                                           when the backlight turns on */
#define LP8555_OFF_OPENLEDS     BIT(2)
#define LP8555_PWM_CONFIG       LP8555_PWM_ONLY
#define LP8555_I2C_CONFIG       LP8555_I2C_ONLY
#define LP8555_COMB1_CONFIG     LP8555_COMBINED1
#define LP8555_COMB2_CONFIG     LP8555_COMBINED2

/* DEVICE CONTROL register - LP8556 */
#define LP8556_PWM_CONFIG       (LP8556_PWM_ONLY << BRT_MODE_SHFT)
#define LP8556_COMB1_CONFIG     (LP8556_COMBINED1 << BRT_MODE_SHFT)
#define LP8556_I2C_CONFIG       ((ENABLE_BL << BL_CTL_SHFT) | \
                                (LP8556_I2C_ONLY << BRT_MODE_SHFT))
#define LP8556_COMB2_CONFIG     (LP8556_COMBINED2 << BRT_MODE_SHFT)
#define LP8556_FAST_CONFIG      BIT(7) /* use it if EPROMs should be maintained
                                          when exiting the low power mode */

/* CONFIG register - LP8557 */
#define LP8557_PWM_STANDBY      BIT(7)
#define LP8557_PWM_FILTER       BIT(6)
#define LP8557_RELOAD_EPROM     BIT(3)  /* use it if EPROMs should be reset
                                           when the backlight turns on */
#define LP8557_OFF_OPENLEDS     BIT(2)
#define LP8557_PWM_CONFIG       LP8557_PWM_ONLY
#define LP8557_I2C_CONFIG       LP8557_I2C_ONLY
#define LP8557_COMB1_CONFIG     LP8557_COMBINED1
#define LP8557_COMB2_CONFIG     LP8557_COMBINED2

enum lp855x_chip_id {
        LP8550,
        LP8551,
        LP8552,
        LP8553,
        LP8555,
        LP8556,
        LP8557,
};

enum lp8550_brighntess_source {
        LP8550_PWM_ONLY,
        LP8550_I2C_ONLY = 2,
};

enum lp8551_brighntess_source {
        LP8551_PWM_ONLY = LP8550_PWM_ONLY,
        LP8551_I2C_ONLY = LP8550_I2C_ONLY,
};

enum lp8552_brighntess_source {
        LP8552_PWM_ONLY = LP8550_PWM_ONLY,
        LP8552_I2C_ONLY = LP8550_I2C_ONLY,
};

enum lp8553_brighntess_source {
        LP8553_PWM_ONLY = LP8550_PWM_ONLY,
        LP8553_I2C_ONLY = LP8550_I2C_ONLY,
};

enum lp8555_brightness_source {
        LP8555_PWM_ONLY,
        LP8555_I2C_ONLY,
        LP8555_COMBINED1,       /* Brightness register with shaped PWM */
        LP8555_COMBINED2,       /* PWM with shaped brightness register */
};

enum lp8556_brightness_source {
        LP8556_PWM_ONLY,
        LP8556_COMBINED1,       /* pwm + i2c before the shaper block */
        LP8556_I2C_ONLY,
        LP8556_COMBINED2,       /* pwm + i2c after the shaper block */
};

enum lp8557_brightness_source {
        LP8557_PWM_ONLY,
        LP8557_I2C_ONLY,
        LP8557_COMBINED1,       /* pwm + i2c after the shaper block */
        LP8557_COMBINED2,       /* pwm + i2c before the shaper block */
};

struct lp855x_rom_data {
        u8 addr;
        u8 val;
};

/**
 * struct lp855x_platform_data
 * @name : Backlight driver name. If it is not defined, default name is set.
 * @device_control : value of DEVICE CONTROL register
 * @initial_brightness : initial value of backlight brightness
 * @period_ns : platform specific pwm period value. unit is nano.
                Only valid when mode is PWM_BASED.
 * @size_program : total size of lp855x_rom_data
 * @rom_data : list of new eeprom/eprom registers
 */
struct lp855x_platform_data {
        const char *name;
        u8 device_control;
        u8 initial_brightness;
        unsigned int period_ns;
        int size_program;
        struct lp855x_rom_data *rom_data;
};

#endif