// SPDX-License-Identifier: GPL-2.0-only /* * LTRF216A Ambient Light Sensor * * Copyright (C) 2022 Collabora, Ltd. * Author: Shreeya Patel <[email protected]> * * Copyright (C) 2021 Lite-On Technology Corp (Singapore) * Author: Shi Zhigang <[email protected]> * * IIO driver for LTRF216A (7-bit I2C slave address 0x53). */ #include <linux/bitfield.h> #include <linux/bits.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/iopoll.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/iio/iio.h> #include <linux/unaligned.h> #define LTRF216A_ALS_RESET_MASK … #define LTRF216A_ALS_DATA_STATUS … #define LTRF216A_ALS_ENABLE_MASK … #define LTRF216A_MAIN_CTRL … #define LTRF216A_ALS_MEAS_RES … #define LTRF216A_ALS_GAIN … #define LTRF216A_PART_ID … #define LTRF216A_MAIN_STATUS … #define LTRF216A_ALS_CLEAR_DATA_0 … #define LTRF216A_ALS_CLEAR_DATA_1 … #define LTRF216A_ALS_CLEAR_DATA_2 … #define LTRF216A_ALS_DATA_0 … #define LTRF216A_ALS_DATA_1 … #define LTRF216A_ALS_DATA_2 … #define LTRF216A_INT_CFG … #define LTRF216A_INT_PST … #define LTRF216A_ALS_THRES_UP_0 … #define LTRF216A_ALS_THRES_UP_1 … #define LTRF216A_ALS_THRES_UP_2 … #define LTRF216A_ALS_THRES_LOW_0 … #define LTRF216A_ALS_THRES_LOW_1 … #define LTRF216A_ALS_THRES_LOW_2 … #define LTRF216A_ALS_READ_DATA_DELAY_US … static const int ltrf216a_int_time_available[][2] = …; static const int ltrf216a_int_time_reg[][2] = …; struct ltr_chip_info { … }; /* * Window Factor is needed when the device is under Window glass * with coated tinted ink. This is to compensate for the light loss * due to the lower transmission rate of the window glass and helps * in calculating lux. */ #define LTRF216A_WIN_FAC … struct ltrf216a_data { … }; static const struct iio_chan_spec ltrf216a_channels[] = …; static void ltrf216a_reset(struct iio_dev *indio_dev) { … } static int ltrf216a_enable(struct iio_dev *indio_dev) { … } static int ltrf216a_disable(struct iio_dev *indio_dev) { … } static void ltrf216a_cleanup(void *data) { … } static int ltrf216a_set_int_time(struct ltrf216a_data *data, int itime) { … } static int ltrf216a_get_int_time(struct ltrf216a_data *data, int *val, int *val2) { … } static int ltrf216a_set_power_state(struct ltrf216a_data *data, bool on) { … } static int ltrf216a_read_data(struct ltrf216a_data *data, u8 addr) { … } static int ltrf216a_get_lux(struct ltrf216a_data *data) { … } static int ltrf216a_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int ltrf216a_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int ltrf216a_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 ltrf216a_info = …; static bool ltrf216a_readable_reg(struct device *dev, unsigned int reg) { … } static bool ltrf216a_writable_reg(struct device *dev, unsigned int reg) { … } static bool ltrf216a_volatile_reg(struct device *dev, unsigned int reg) { … } static bool ltrf216a_precious_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config ltrf216a_regmap_config = …; static int ltrf216a_probe(struct i2c_client *client) { … } static int ltrf216a_runtime_suspend(struct device *dev) { … } static int ltrf216a_runtime_resume(struct device *dev) { … } static DEFINE_RUNTIME_DEV_PM_OPS(ltrf216a_pm_ops, ltrf216a_runtime_suspend, ltrf216a_runtime_resume, NULL); static const struct ltr_chip_info ltr308_chip_info = …; static const struct ltr_chip_info ltrf216a_chip_info = …; static const struct i2c_device_id ltrf216a_id[] = …; MODULE_DEVICE_TABLE(i2c, ltrf216a_id); static const struct of_device_id ltrf216a_of_match[] = …; MODULE_DEVICE_TABLE(of, ltrf216a_of_match); static struct i2c_driver ltrf216a_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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