// SPDX-License-Identifier: GPL-2.0-only /* * zopt2201.c - Support for IDT ZOPT2201 ambient light and UV B sensor * * Copyright 2017 Peter Meerwald-Stadler <[email protected]> * * Datasheet: https://www.idt.com/document/dst/zopt2201-datasheet * 7-bit I2C slave addresses 0x53 (default) or 0x52 (programmed) * * TODO: interrupt support, ALS/UVB raw mode */ #include <linux/module.h> #include <linux/i2c.h> #include <linux/mutex.h> #include <linux/err.h> #include <linux/delay.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/unaligned.h> #define ZOPT2201_DRV_NAME … /* Registers */ #define ZOPT2201_MAIN_CTRL … #define ZOPT2201_LS_MEAS_RATE … #define ZOPT2201_LS_GAIN … #define ZOPT2201_PART_ID … #define ZOPT2201_MAIN_STATUS … #define ZOPT2201_ALS_DATA … #define ZOPT2201_UVB_DATA … #define ZOPT2201_UV_COMP_DATA … #define ZOPT2201_COMP_DATA … #define ZOPT2201_INT_CFG … #define ZOPT2201_INT_PST … #define ZOPT2201_MAIN_CTRL_LS_MODE … #define ZOPT2201_MAIN_CTRL_LS_EN … /* Values for ZOPT2201_LS_MEAS_RATE resolution / bit width */ #define ZOPT2201_MEAS_RES_20BIT … #define ZOPT2201_MEAS_RES_19BIT … #define ZOPT2201_MEAS_RES_18BIT … #define ZOPT2201_MEAS_RES_17BIT … #define ZOPT2201_MEAS_RES_16BIT … #define ZOPT2201_MEAS_RES_13BIT … #define ZOPT2201_MEAS_RES_SHIFT … /* Values for ZOPT2201_LS_MEAS_RATE measurement rate */ #define ZOPT2201_MEAS_FREQ_25MS … #define ZOPT2201_MEAS_FREQ_50MS … #define ZOPT2201_MEAS_FREQ_100MS … #define ZOPT2201_MEAS_FREQ_200MS … #define ZOPT2201_MEAS_FREQ_500MS … #define ZOPT2201_MEAS_FREQ_1000MS … #define ZOPT2201_MEAS_FREQ_2000MS … /* Values for ZOPT2201_LS_GAIN */ #define ZOPT2201_LS_GAIN_1 … #define ZOPT2201_LS_GAIN_3 … #define ZOPT2201_LS_GAIN_6 … #define ZOPT2201_LS_GAIN_9 … #define ZOPT2201_LS_GAIN_18 … /* Values for ZOPT2201_MAIN_STATUS */ #define ZOPT2201_MAIN_STATUS_POWERON … #define ZOPT2201_MAIN_STATUS_INT … #define ZOPT2201_MAIN_STATUS_DRDY … #define ZOPT2201_PART_NUMBER … struct zopt2201_data { … }; static const struct { … } zopt2201_gain_als[] = …; static const struct { … } zopt2201_gain_uvb[] = …; static const struct { … } zopt2201_resolution[] = …; static const struct { … } zopt2201_scale_als[] = …; static const struct { … } zopt2201_scale_uvb[] = …; static int zopt2201_enable_mode(struct zopt2201_data *data, bool uvb_mode) { … } static int zopt2201_read(struct zopt2201_data *data, u8 reg) { … } static const struct iio_chan_spec zopt2201_channels[] = …; static int zopt2201_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int zopt2201_set_resolution(struct zopt2201_data *data, u8 res) { … } static int zopt2201_write_resolution(struct zopt2201_data *data, int val, int val2) { … } static int zopt2201_set_gain(struct zopt2201_data *data, u8 gain) { … } static int zopt2201_write_scale_als_by_idx(struct zopt2201_data *data, int idx) { … } static int zopt2201_write_scale_als(struct zopt2201_data *data, int val, int val2) { … } static int zopt2201_write_scale_uvb_by_idx(struct zopt2201_data *data, int idx) { … } static int zopt2201_write_scale_uvb(struct zopt2201_data *data, int val, int val2) { … } static int zopt2201_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static ssize_t zopt2201_show_int_time_available(struct device *dev, struct device_attribute *attr, char *buf) { … } static IIO_DEV_ATTR_INT_TIME_AVAIL(zopt2201_show_int_time_available); static ssize_t zopt2201_show_als_scale_avail(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t zopt2201_show_uvb_scale_avail(struct device *dev, struct device_attribute *attr, char *buf) { … } static IIO_DEVICE_ATTR(in_illuminance_scale_available, 0444, zopt2201_show_als_scale_avail, NULL, 0); static IIO_DEVICE_ATTR(in_intensity_uv_scale_available, 0444, zopt2201_show_uvb_scale_avail, NULL, 0); static struct attribute *zopt2201_attributes[] = …; static const struct attribute_group zopt2201_attribute_group = …; static const struct iio_info zopt2201_info = …; static int zopt2201_probe(struct i2c_client *client) { … } static const struct i2c_device_id zopt2201_id[] = …; MODULE_DEVICE_TABLE(i2c, zopt2201_id); static struct i2c_driver zopt2201_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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