// 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 <[email protected]> */ #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/property.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 … #define PROX_STAT_SAMP … #define MAX_SAMPLES_CAL … /* TSL2772 Device ID */ #define TRITON_ID … #define SWORDFISH_ID … #define HALIBUT_ID … /* Lux calculation constants */ #define TSL2772_LUX_CALC_OVER_FLOW … /* * 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 … /* Device Registers and Masks */ #define TSL2772_CNTRL … #define TSL2772_ALS_TIME … #define TSL2772_PRX_TIME … #define TSL2772_WAIT_TIME … #define TSL2772_ALS_MINTHRESHLO … #define TSL2772_ALS_MINTHRESHHI … #define TSL2772_ALS_MAXTHRESHLO … #define TSL2772_ALS_MAXTHRESHHI … #define TSL2772_PRX_MINTHRESHLO … #define TSL2772_PRX_MINTHRESHHI … #define TSL2772_PRX_MAXTHRESHLO … #define TSL2772_PRX_MAXTHRESHHI … #define TSL2772_PERSISTENCE … #define TSL2772_ALS_PRX_CONFIG … #define TSL2772_PRX_COUNT … #define TSL2772_GAIN … #define TSL2772_NOTUSED … #define TSL2772_REVID … #define TSL2772_CHIPID … #define TSL2772_STATUS … #define TSL2772_ALS_CHAN0LO … #define TSL2772_ALS_CHAN0HI … #define TSL2772_ALS_CHAN1LO … #define TSL2772_ALS_CHAN1HI … #define TSL2772_PRX_LO … #define TSL2772_PRX_HI … /* tsl2772 cmd reg masks */ #define TSL2772_CMD_REG … #define TSL2772_CMD_SPL_FN … #define TSL2772_CMD_REPEAT_PROTO … #define TSL2772_CMD_AUTOINC_PROTO … #define TSL2772_CMD_PROX_INT_CLR … #define TSL2772_CMD_ALS_INT_CLR … #define TSL2772_CMD_PROXALS_INT_CLR … /* tsl2772 cntrl reg masks */ #define TSL2772_CNTL_ADC_ENBL … #define TSL2772_CNTL_PWR_ON … /* tsl2772 status reg masks */ #define TSL2772_STA_ADC_VALID … #define TSL2772_STA_PRX_VALID … #define TSL2772_STA_ADC_PRX_VALID … #define TSL2772_STA_ALS_INTR … #define TSL2772_STA_PRX_INTR … /* tsl2772 cntrl reg masks */ #define TSL2772_CNTL_REG_CLEAR … #define TSL2772_CNTL_PROX_INT_ENBL … #define TSL2772_CNTL_ALS_INT_ENBL … #define TSL2772_CNTL_WAIT_TMR_ENBL … #define TSL2772_CNTL_PROX_DET_ENBL … #define TSL2772_CNTL_PWRON … #define TSL2772_CNTL_ALSPON_ENBL … #define TSL2772_CNTL_INTALSPON_ENBL … #define TSL2772_CNTL_PROXPON_ENBL … #define TSL2772_CNTL_INTPROXPON_ENBL … #define TSL2772_ALS_GAIN_TRIM_MIN … #define TSL2772_ALS_GAIN_TRIM_MAX … #define TSL2772_MAX_PROX_LEDS … #define TSL2772_BOOT_MIN_SLEEP_TIME … #define TSL2772_BOOT_MAX_SLEEP_TIME … /* Device family members */ enum { … }; enum { … }; enum { … }; /* Per-device data */ struct tsl2772_als_info { … }; struct tsl2772_chip_info { … }; static const int tsl2772_led_currents[][2] = …; struct tsl2772_chip { … }; /* * Different devices require different coefficents, and these numbers were * derived from the 'Lux Equation' section of the various device datasheets. * All of these coefficients assume a Glass Attenuation (GA) factor of 1. * The coefficients are multiplied by 1000 to avoid floating point operations. * The two rows in each table correspond to the Lux1 and Lux2 equations from * the datasheets. */ static const struct tsl2772_lux tsl2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = …; static const struct tsl2772_lux tmd2x71_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = …; static const struct tsl2772_lux tsl2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = …; static const struct tsl2772_lux tmd2x72_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = …; static const struct tsl2772_lux apds9930_lux_table[TSL2772_DEF_LUX_TABLE_SZ] = …; static const struct tsl2772_lux *tsl2772_default_lux_table_group[] = …; static const struct tsl2772_settings tsl2772_default_settings = …; static const s16 tsl2772_als_gain[] = …; static const s16 tsl2772_prox_gain[] = …; static const int tsl2772_int_time_avail[][6] = …; static int tsl2772_int_calibscale_avail[] = …; static int tsl2772_prox_calibscale_avail[] = …; /* Channel variations */ enum { … }; static const u8 device_channel_config[] = …; static int tsl2772_read_status(struct tsl2772_chip *chip) { … } static int tsl2772_write_control_reg(struct tsl2772_chip *chip, u8 data) { … } static int tsl2772_read_autoinc_regs(struct tsl2772_chip *chip, int lower_reg, int upper_reg) { … } /** * tsl2772_get_lux() - Reads and calculates current lux value. * @indio_dev: pointer to IIO device * * The raw ch0 and ch1 values of the ambient light sensed in the last * integration cycle are read from the device. The raw values are multiplied * by a device-specific scale factor, and divided by the integration time and * device gain. The code supports multiple lux equations through the lux table * coefficients. A lux gain trim is applied to each lux equation, and then the * maximum lux within the interval 0..65535 is selected. */ static int tsl2772_get_lux(struct iio_dev *indio_dev) { … } /** * tsl2772_get_prox() - Reads proximity data registers and updates * chip->prox_data. * * @indio_dev: pointer to IIO device */ static int tsl2772_get_prox(struct iio_dev *indio_dev) { … } static int tsl2772_read_prox_led_current(struct tsl2772_chip *chip) { … } static int tsl2772_read_prox_diodes(struct tsl2772_chip *chip) { … } static void tsl2772_parse_dt(struct tsl2772_chip *chip) { … } /** * tsl2772_defaults() - Populates the device nominal operating parameters * with those provided by a 'platform' data struct or * with prefined defaults. * * @chip: pointer to device structure. */ static void tsl2772_defaults(struct tsl2772_chip *chip) { … } /** * tsl2772_als_calibrate() - Obtain single reading and calculate * the als_gain_trim. * * @indio_dev: pointer to IIO device */ static int tsl2772_als_calibrate(struct iio_dev *indio_dev) { … } static void tsl2772_disable_regulators_action(void *_data) { … } static int tsl2772_chip_on(struct iio_dev *indio_dev) { … } static int tsl2772_chip_off(struct iio_dev *indio_dev) { … } static void tsl2772_chip_off_action(void *data) { … } /** * tsl2772_invoke_change - power cycle the device to implement the user * parameters * @indio_dev: pointer to IIO device * * Obtain and lock both ALS and PROX resources, determine and save device state * (On/Off), cycle device to implement updated parameter, put device back into * proper state, and unlock resource. */ static int tsl2772_invoke_change(struct iio_dev *indio_dev) { … } static int tsl2772_prox_cal(struct iio_dev *indio_dev) { … } static int tsl2772_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { … } static ssize_t in_illuminance0_target_input_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t in_illuminance0_target_input_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static ssize_t in_illuminance0_calibrate_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static ssize_t in_illuminance0_lux_table_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t in_illuminance0_lux_table_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static ssize_t in_proximity0_calibrate_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static int tsl2772_read_interrupt_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir) { … } static int tsl2772_write_interrupt_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, int val) { … } static int tsl2772_write_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int val, int val2) { … } static int tsl2772_read_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int *val, int *val2) { … } static int tsl2772_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int tsl2772_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static DEVICE_ATTR_RW(in_illuminance0_target_input); static DEVICE_ATTR_WO(in_illuminance0_calibrate); static DEVICE_ATTR_WO(in_proximity0_calibrate); static DEVICE_ATTR_RW(in_illuminance0_lux_table); /* Use the default register values to identify the Taos device */ static int tsl2772_device_id_verif(int id, int target) { … } static irqreturn_t tsl2772_event_handler(int irq, void *private) { … } static struct attribute *tsl2772_ALS_device_attrs[] = …; static struct attribute *tsl2772_PRX_device_attrs[] = …; static struct attribute *tsl2772_ALSPRX_device_attrs[] = …; static struct attribute *tsl2772_PRX2_device_attrs[] = …; static struct attribute *tsl2772_ALSPRX2_device_attrs[] = …; static const struct attribute_group tsl2772_device_attr_group_tbl[] = …; #define TSL2772_DEVICE_INFO(type) … static const struct iio_info tsl2772_device_info[] = …; static const struct iio_event_spec tsl2772_events[] = …; static const struct tsl2772_chip_info tsl2772_chip_info_tbl[] = …; static int tsl2772_probe(struct i2c_client *clientp) { … } static int tsl2772_suspend(struct device *dev) { … } static int tsl2772_resume(struct device *dev) { … } static const struct i2c_device_id tsl2772_idtable[] = …; MODULE_DEVICE_TABLE(i2c, tsl2772_idtable); static const struct of_device_id tsl2772_of_match[] = …; MODULE_DEVICE_TABLE(of, tsl2772_of_match); static const struct dev_pm_ops tsl2772_pm_ops = …; static struct i2c_driver tsl2772_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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