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/*
* 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
/* 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,
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 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.
* @load_new_rom_data :
0 : use default configuration data
1 : update values of eeprom or eprom registers on loading driver
* @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;
u8 load_new_rom_data;
int size_program;
struct lp855x_rom_data *rom_data;
};
#endif
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