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* Device driver for monitoring ambient light intensity (lux)
* and proximity (prox) within the TAOS TSL2X7X family of devices.
* Copyright (c) 2012, TAOS Corporation.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#ifndef __TSL2X7X_H
#define __TSL2X7X_H
#include <linux/pm.h>
/* Max number of segments allowable in LUX table */
struct iio_dev;
struct tsl2x7x_lux {
unsigned int ratio;
unsigned int ch0;
unsigned int ch1;
* struct tsl2x7x_default_settings - power on defaults unless
* overridden by platform data.
* @als_time: ALS Integration time - multiple of 50mS
* @als_gain: Index into the ALS gain table.
* @als_gain_trim: default gain trim to account for
* aperture effects.
* @wait_time: Time between PRX and ALS cycles
* in 2.7 periods
* @prx_time: 5.2ms prox integration time -
* decrease in 2.7ms periods
* @prx_gain: Proximity gain index
* @prox_config: Prox configuration filters.
* @als_cal_target: Known external ALS reading for
* calibration.
* @interrupts_en: Enable/Disable - 0x00 = none, 0x10 = als,
* 0x20 = prx, 0x30 = bth
* @persistence: H/W Filters, Number of 'out of limits'
* ADC readings PRX/ALS.
* @als_thresh_low: CH0 'low' count to trigger interrupt.
* @als_thresh_high: CH0 'high' count to trigger interrupt.
* @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: Used for prox cal.
struct tsl2x7x_settings {
int als_time;
int als_gain;
int als_gain_trim;
int wait_time;
int prx_time;
int prox_gain;
int prox_config;
int als_cal_target;
u8 interrupts_en;
u8 persistence;
int als_thresh_low;
int als_thresh_high;
int prox_thres_low;
int prox_thres_high;
int prox_pulse_count;
int prox_max_samples_cal;
* struct tsl2X7X_platform_data - Platform callback, glass and defaults
* @platform_power: Suspend/resume platform callback
* @power_on: Power on callback
* @power_off: Power off callback
* @platform_lux_table: Device specific glass coefficents
* @platform_default_settings: Device specific power on defaults
struct tsl2X7X_platform_data {
int (*platform_power)(struct device *dev, pm_message_t);
int (*power_on)(struct iio_dev *indio_dev);
int (*power_off)(struct i2c_client *dev);
struct tsl2x7x_lux platform_lux_table[TSL2X7X_MAX_LUX_TABLE_SIZE];
struct tsl2x7x_settings *platform_default_settings;
#endif /* __TSL2X7X_H */