// SPDX-License-Identifier: GPL-2.0+ /* * hdc3020.c - Support for the TI HDC3020,HDC3021 and HDC3022 * temperature + relative humidity sensors * * Copyright (C) 2023 * * Copyright (C) 2024 Liebherr-Electronics and Drives GmbH * * Datasheet: https://www.ti.com/lit/ds/symlink/hdc3020.pdf */ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/cleanup.h> #include <linux/crc8.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/math64.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/pm.h> #include <linux/regulator/consumer.h> #include <linux/units.h> #include <asm/unaligned.h> #include <linux/iio/events.h> #include <linux/iio/iio.h> #define HDC3020_S_AUTO_10HZ_MOD0 … #define HDC3020_S_STATUS … #define HDC3020_HEATER_DISABLE … #define HDC3020_HEATER_ENABLE … #define HDC3020_HEATER_CONFIG … #define HDC3020_EXIT_AUTO … #define HDC3020_S_T_RH_THRESH_LOW … #define HDC3020_S_T_RH_THRESH_LOW_CLR … #define HDC3020_S_T_RH_THRESH_HIGH_CLR … #define HDC3020_S_T_RH_THRESH_HIGH … #define HDC3020_R_T_RH_AUTO … #define HDC3020_R_T_LOW_AUTO … #define HDC3020_R_T_HIGH_AUTO … #define HDC3020_R_RH_LOW_AUTO … #define HDC3020_R_RH_HIGH_AUTO … #define HDC3020_R_T_RH_THRESH_LOW … #define HDC3020_R_T_RH_THRESH_LOW_CLR … #define HDC3020_R_T_RH_THRESH_HIGH_CLR … #define HDC3020_R_T_RH_THRESH_HIGH … #define HDC3020_R_STATUS … #define HDC3020_THRESH_TEMP_MASK … #define HDC3020_THRESH_TEMP_TRUNC_SHIFT … #define HDC3020_THRESH_HUM_MASK … #define HDC3020_THRESH_HUM_TRUNC_SHIFT … #define HDC3020_STATUS_T_LOW_ALERT … #define HDC3020_STATUS_T_HIGH_ALERT … #define HDC3020_STATUS_RH_LOW_ALERT … #define HDC3020_STATUS_RH_HIGH_ALERT … #define HDC3020_READ_RETRY_TIMES … #define HDC3020_BUSY_DELAY_MS … #define HDC3020_CRC8_POLYNOMIAL … #define HDC3020_MIN_TEMP_MICRO … #define HDC3020_MAX_TEMP_MICRO … #define HDC3020_MAX_TEMP_HYST_MICRO … #define HDC3020_MAX_HUM_MICRO … struct hdc3020_data { … }; static const int hdc3020_heater_vals[] = …; static const struct iio_event_spec hdc3020_t_rh_event[] = …; static const struct iio_chan_spec hdc3020_channels[] = …; DECLARE_CRC8_TABLE(hdc3020_crc8_table); static int hdc3020_write_bytes(struct hdc3020_data *data, u8 *buf, u8 len) { … } static int hdc3020_read_bytes(struct hdc3020_data *data, u16 reg, u8 *buf, int len) { … } static int hdc3020_read_be16(struct hdc3020_data *data, u16 reg) { … } static int hdc3020_exec_cmd(struct hdc3020_data *data, u16 reg) { … } static int hdc3020_read_measurement(struct hdc3020_data *data, enum iio_chan_type type, int *val) { … } static int hdc3020_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int hdc3020_read_available(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { … } static int hdc3020_update_heater(struct hdc3020_data *data, int val) { … } static int hdc3020_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int hdc3020_thresh_get_temp(u16 thresh) { … } static int hdc3020_thresh_get_hum(u16 thresh) { … } static u16 hdc3020_thresh_set_temp(int s_temp, u16 curr_thresh) { … } static u16 hdc3020_thresh_set_hum(int s_hum, u16 curr_thresh) { … } static int hdc3020_thresh_clr(s64 s_thresh, s64 s_hyst, enum iio_event_direction dir) { … } static int _hdc3020_write_thresh(struct hdc3020_data *data, u16 reg, u16 val) { … } static int hdc3020_write_thresh(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 hdc3020_read_thresh(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 irqreturn_t hdc3020_interrupt_handler(int irq, void *private) { … } static const struct iio_info hdc3020_info = …; static int hdc3020_power_off(struct hdc3020_data *data) { … } static int hdc3020_power_on(struct hdc3020_data *data) { … } static void hdc3020_exit(void *data) { … } static int hdc3020_probe(struct i2c_client *client) { … } static int hdc3020_suspend(struct device *dev) { … } static int hdc3020_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(hdc3020_pm_ops, hdc3020_suspend, hdc3020_resume); static const struct i2c_device_id hdc3020_id[] = …; MODULE_DEVICE_TABLE(i2c, hdc3020_id); static const struct of_device_id hdc3020_dt_ids[] = …; MODULE_DEVICE_TABLE(of, hdc3020_dt_ids); static struct i2c_driver hdc3020_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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