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/* SPDX-License-Identifier: GPL-2.0+ */
* Device driver for monitoring ambient light intensity (lux)
* and proximity (prox) within the TAOS TSL2772 family of devices.
* Copyright (c) 2012, TAOS Corporation.
* Copyright (c) 2017-2018 Brian Masney <>
#ifndef __TSL2772_H
#define __TSL2772_H
struct tsl2772_lux {
unsigned int ch0;
unsigned int ch1;
/* Max number of segments allowable in LUX table */
#define TSL2772_MAX_LUX_TABLE_SIZE 6
/* The default LUX tables all have 3 elements. */
#define TSL2772_DEF_LUX_TABLE_SZ 3
#define TSL2772_DEFAULT_TABLE_BYTES (sizeof(struct tsl2772_lux) * \
/* Proximity diode to use */
#define TSL2772_DIODE0 0x01
#define TSL2772_DIODE1 0x02
#define TSL2772_DIODE_BOTH 0x03
/* LED Power */
#define TSL2772_100_mA 0x00
#define TSL2772_50_mA 0x01
#define TSL2772_25_mA 0x02
#define TSL2772_13_mA 0x03
* struct tsl2772_settings - Settings for the tsl2772 driver
* @als_time: Integration time of the ALS channel ADCs in 2.73 ms
* increments. Total integration time is
* (256 - als_time) * 2.73.
* @als_gain: Index into the tsl2772_als_gain array.
* @als_gain_trim: Default gain trim to account for aperture effects.
* @wait_time: Time between proximity and ALS cycles in 2.73
* periods.
* @prox_time: Integration time of the proximity ADC in 2.73 ms
* increments. Total integration time is
* (256 - prx_time) * 2.73.
* @prox_gain: Index into the tsl2772_prx_gain array.
* @als_prox_config: The value of the ALS / Proximity configuration
* register.
* @als_cal_target: Known external ALS reading for calibration.
* @als_persistence: H/W Filters, Number of 'out of limits' ALS readings.
* @als_interrupt_en: Enable/Disable ALS interrupts
* @als_thresh_low: CH0 'low' count to trigger interrupt.
* @als_thresh_high: CH0 'high' count to trigger interrupt.
* @prox_persistence: H/W Filters, Number of 'out of limits' proximity
* readings.
* @prox_interrupt_en: Enable/Disable proximity interrupts.
* @prox_thres_low: Low threshold proximity detection.
* @prox_thres_high: High threshold proximity detection.
* @prox_pulse_count: Number if proximity emitter pulses.
* @prox_max_samples_cal: The number of samples that are taken when performing
* a proximity calibration.
* @prox_diode Which diode(s) to use for driving the external
* LED(s) for proximity sensing.
* @prox_power The amount of power to use for the external LED(s).
struct tsl2772_settings {
int als_time;
int als_gain;
int als_gain_trim;
int wait_time;
int prox_time;
int prox_gain;
int als_prox_config;
int als_cal_target;
u8 als_persistence;
bool als_interrupt_en;
int als_thresh_low;
int als_thresh_high;
u8 prox_persistence;
bool prox_interrupt_en;
int prox_thres_low;
int prox_thres_high;
int prox_pulse_count;
int prox_max_samples_cal;
int prox_diode;
int prox_power;
* struct tsl2772_platform_data - Platform callback, glass and defaults
* @platform_lux_table: Device specific glass coefficents
* @platform_default_settings: Device specific power on defaults
struct tsl2772_platform_data {
struct tsl2772_lux platform_lux_table[TSL2772_MAX_LUX_TABLE_SIZE];
struct tsl2772_settings *platform_default_settings;
#endif /* __TSL2772_H */