linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * Device driver for monitoring ambient light intensity in (lux) and proximity

 * detection (prox) within the TAOS TSL2571, TSL2671, TMD2671, TSL2771, TMD2771,

 * TSL2572, TSL2672, TMD2672, TSL2772, and TMD2772 devices.

 *

 * Copyright (c) 2012, TAOS Corporation.

 * Copyright (c) 2017-2018 Brian Masney <masneyb@onstation.org>

 */

​

#include <linux/delay.h>

#include <linux/errno.h>

#include <linux/i2c.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/slab.h>

#include <linux/iio/events.h>

#include <linux/iio/iio.h>

#include <linux/iio/sysfs.h>

#include <linux/platform_data/tsl2772.h>

#include <linux/regulator/consumer.h>

​

/* Cal defs */

#define PROX_STAT_CAL           0

#define PROX_STAT_SAMP          1

#define MAX_SAMPLES_CAL         200

​

/* TSL2772 Device ID */

#define TRITON_ID           0x00

#define SWORDFISH_ID            0x30

#define HALIBUT_ID          0x20

​

/* Lux calculation constants */

#define TSL2772_LUX_CALC_OVER_FLOW  65535

​

/*

 * TAOS Register definitions - Note: depending on device, some of these register

 * are not used and the register address is benign.

 */

​

/* Register offsets */

#define TSL2772_MAX_CONFIG_REG      16

​

/* Device Registers and Masks */

#define TSL2772_CNTRL           0x00

#define TSL2772_ALS_TIME        0X01

#define TSL2772_PRX_TIME        0x02

#define TSL2772_WAIT_TIME       0x03

#define TSL2772_ALS_MINTHRESHLO     0X04

#define TSL2772_ALS_MINTHRESHHI     0X05

#define TSL2772_ALS_MAXTHRESHLO     0X06

#define TSL2772_ALS_MAXTHRESHHI     0X07

#define TSL2772_PRX_MINTHRESHLO     0X08

#define TSL2772_PRX_MINTHRESHHI     0X09

#define TSL2772_PRX_MAXTHRESHLO     0X0A

#define TSL2772_PRX_MAXTHRESHHI     0X0B

#define TSL2772_PERSISTENCE     0x0C

#define TSL2772_ALS_PRX_CONFIG      0x0D

#define TSL2772_PRX_COUNT       0x0E

#define TSL2772_GAIN            0x0F

#define TSL2772_NOTUSED         0x10

#define TSL2772_REVID           0x11

#define TSL2772_CHIPID          0x12

#define TSL2772_STATUS          0x13

#define TSL2772_ALS_CHAN0LO     0x14

#define TSL2772_ALS_CHAN0HI     0x15

#define TSL2772_ALS_CHAN1LO     0x16

#define TSL2772_ALS_CHAN1HI     0x17

#define TSL2772_PRX_LO          0x18

#define TSL2772_PRX_HI          0x19

​

/* tsl2772 cmd reg masks */

#define TSL2772_CMD_REG         0x80

#define TSL2772_CMD_SPL_FN      0x60

#define TSL2772_CMD_REPEAT_PROTO    0x00

#define TSL2772_CMD_AUTOINC_PROTO   0x20

​

#define TSL2772_CMD_PROX_INT_CLR    0X05

#define TSL2772_CMD_ALS_INT_CLR     0x06

#define TSL2772_CMD_PROXALS_INT_CLR 0X07

​

/* tsl2772 cntrl reg masks */

#define TSL2772_CNTL_ADC_ENBL       0x02

#define TSL2772_CNTL_PWR_ON     0x01

​

/* tsl2772 status reg masks */

#define TSL2772_STA_ADC_VALID       0x01

#define TSL2772_STA_PRX_VALID       0x02

#define TSL2772_STA_ADC_PRX_VALID   (TSL2772_STA_ADC_VALID | \

                     TSL2772_STA_PRX_VALID)