diff options
Diffstat (limited to 'include/linux/lp855x.h')
| -rw-r--r-- | include/linux/lp855x.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/include/linux/lp855x.h b/include/linux/lp855x.h new file mode 100644 index 00000000..781a490a --- /dev/null +++ b/include/linux/lp855x.h @@ -0,0 +1,131 @@ +/* + * 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) + +/* ROM area boundary */ +#define EEPROM_START (0xA0) +#define EEPROM_END (0xA7) +#define EPROM_START (0xA0) +#define EPROM_END (0xAF) + +enum lp855x_chip_id { + LP8550, + LP8551, + LP8552, + LP8553, + LP8556, +}; + +enum lp855x_brightness_ctrl_mode { + PWM_BASED = 1, + REGISTER_BASED, +}; + +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 */ +}; + +struct lp855x_pwm_data { + void (*pwm_set_intensity) (int brightness, int max_brightness); + int (*pwm_get_intensity) (int max_brightness); +}; + +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. + * @mode : brightness control by pwm or lp855x register + * @device_control : value of DEVICE CONTROL register + * @initial_brightness : initial value of backlight brightness + * @pwm_data : platform specific pwm generation functions. + 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 { + char *name; + enum lp855x_brightness_ctrl_mode mode; + u8 device_control; + int initial_brightness; + struct lp855x_pwm_data pwm_data; + u8 load_new_rom_data; + int size_program; + struct lp855x_rom_data *rom_data; +}; + +#endif |