// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2023 Axis Communications AB * * Datasheet: https://www.ti.com/lit/gpn/opt4001 * * Device driver for the Texas Instruments OPT4001. */ #include <linux/bitfield.h> #include <linux/i2c.h> #include <linux/iio/iio.h> #include <linux/math64.h> #include <linux/module.h> #include <linux/property.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> /* OPT4001 register set */ #define OPT4001_LIGHT1_MSB … #define OPT4001_LIGHT1_LSB … #define OPT4001_CTRL … #define OPT4001_DEVICE_ID … /* OPT4001 register mask */ #define OPT4001_EXPONENT_MASK … #define OPT4001_MSB_MASK … #define OPT4001_LSB_MASK … #define OPT4001_COUNTER_MASK … #define OPT4001_CRC_MASK … /* OPT4001 device id mask */ #define OPT4001_DEVICE_ID_MASK … /* OPT4001 control registers mask */ #define OPT4001_CTRL_QWAKE_MASK … #define OPT4001_CTRL_RANGE_MASK … #define OPT4001_CTRL_CONV_TIME_MASK … #define OPT4001_CTRL_OPER_MODE_MASK … #define OPT4001_CTRL_LATCH_MASK … #define OPT4001_CTRL_INT_POL_MASK … #define OPT4001_CTRL_FAULT_COUNT … /* OPT4001 constants */ #define OPT4001_DEVICE_ID_VAL … /* OPT4001 operating modes */ #define OPT4001_CTRL_OPER_MODE_OFF … #define OPT4001_CTRL_OPER_MODE_FORCED … #define OPT4001_CTRL_OPER_MODE_ONE_SHOT … #define OPT4001_CTRL_OPER_MODE_CONTINUOUS … /* OPT4001 conversion control register definitions */ #define OPT4001_CTRL_CONVERSION_0_6MS … #define OPT4001_CTRL_CONVERSION_1MS … #define OPT4001_CTRL_CONVERSION_1_8MS … #define OPT4001_CTRL_CONVERSION_3_4MS … #define OPT4001_CTRL_CONVERSION_6_5MS … #define OPT4001_CTRL_CONVERSION_12_7MS … #define OPT4001_CTRL_CONVERSION_25MS … #define OPT4001_CTRL_CONVERSION_50MS … #define OPT4001_CTRL_CONVERSION_100MS … #define OPT4001_CTRL_CONVERSION_200MS … #define OPT4001_CTRL_CONVERSION_400MS … #define OPT4001_CTRL_CONVERSION_800MS … /* OPT4001 scale light level range definitions */ #define OPT4001_CTRL_LIGHT_SCALE_AUTO … /* OPT4001 default values */ #define OPT4001_DEFAULT_CONVERSION_TIME … /* * The different packaging of OPT4001 has different constants used when calculating * lux values. */ struct opt4001_chip_info { … }; struct opt4001_chip { … }; static const struct opt4001_chip_info opt4001_sot_5x3_info = …; static const struct opt4001_chip_info opt4001_picostar_info = …; static const int opt4001_int_time_available[][2] = …; /* * Conversion time is integration time + time to set register * this is used as integration time. */ static const int opt4001_int_time_reg[][2] = …; static int opt4001_als_time_to_index(const u32 als_integration_time) { … } static u8 opt4001_calculate_crc(u8 exp, u32 mantissa, u8 count) { … } static int opt4001_read_lux_value(struct iio_dev *indio_dev, int *val, int *val2) { … } static int opt4001_set_conf(struct opt4001_chip *chip) { … } static int opt4001_power_down(struct opt4001_chip *chip) { … } static void opt4001_chip_off_action(void *data) { … } static const struct iio_chan_spec opt4001_channels[] = …; static int opt4001_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int opt4001_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int opt4001_read_available(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { … } static const struct iio_info opt4001_info_no_irq = …; static int opt4001_load_defaults(struct opt4001_chip *chip) { … } static bool opt4001_readable_reg(struct device *dev, unsigned int reg) { … } static bool opt4001_writable_reg(struct device *dev, unsigned int reg) { … } static bool opt4001_volatile_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config opt4001_regmap_config = …; static int opt4001_probe(struct i2c_client *client) { … } /* * The compatible string determines which constants to use depending on * opt4001 packaging */ static const struct i2c_device_id opt4001_id[] = …; MODULE_DEVICE_TABLE(i2c, opt4001_id); static const struct of_device_id opt4001_of_match[] = …; MODULE_DEVICE_TABLE(of, opt4001_of_match); static struct i2c_driver opt4001_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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