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lp855x.h
/* SPDX-License-Identifier: GPL-2.0-only */ /* * LP855x Backlight Driver * * Copyright (C) 2011 Texas Instruments */ #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
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