// SPDX-License-Identifier: GPL-2.0 /* * ROHM BH1745 digital colour sensor driver * * Copyright (C) Mudit Sharma <[email protected]> * * 7-bit I2C slave addresses: * 0x38 (ADDR pin low) * 0x39 (ADDR pin high) */ #include <linux/i2c.h> #include <linux/mutex.h> #include <linux/util_macros.h> #include <linux/iio/events.h> #include <linux/regmap.h> #include <linux/bits.h> #include <linux/bitfield.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/trigger.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #include <linux/iio/iio-gts-helper.h> /* BH1745 configuration registers */ /* System control */ #define BH1745_SYS_CTRL … #define BH1745_SYS_CTRL_SW_RESET … #define BH1745_SYS_CTRL_INTR_RESET … #define BH1745_SYS_CTRL_PART_ID_MASK … #define BH1745_PART_ID … /* Mode control 1 */ #define BH1745_MODE_CTRL1 … #define BH1745_CTRL1_MEASUREMENT_TIME_MASK … /* Mode control 2 */ #define BH1745_MODE_CTRL2 … #define BH1745_CTRL2_RGBC_EN … #define BH1745_CTRL2_ADC_GAIN_MASK … /* Interrupt */ #define BH1745_INTR … #define BH1745_INTR_STATUS … #define BH1745_INTR_SOURCE_MASK … #define BH1745_INTR_ENABLE … #define BH1745_PERSISTENCE … /* Threshold high */ #define BH1745_TH_LSB … #define BH1745_TH_MSB … /* Threshold low */ #define BH1745_TL_LSB … #define BH1745_TL_MSB … /* BH1745 data output regs */ #define BH1745_RED_LSB … #define BH1745_RED_MSB … #define BH1745_GREEN_LSB … #define BH1745_GREEN_MSB … #define BH1745_BLUE_LSB … #define BH1745_BLUE_MSB … #define BH1745_CLEAR_LSB … #define BH1745_CLEAR_MSB … #define BH1745_MANU_ID_REG … /* From 16x max HW gain and 32x max integration time */ #define BH1745_MAX_GAIN … enum bh1745_int_source { … }; enum bh1745_gain { … }; enum bh1745_measurement_time { … }; enum bh1745_presistence_value { … }; static const struct iio_gain_sel_pair bh1745_gain[] = …; static const struct iio_itime_sel_mul bh1745_itimes[] = …; struct bh1745_data { … }; static const struct regmap_range bh1745_volatile_ranges[] = …; static const struct regmap_access_table bh1745_volatile_regs = …; static const struct regmap_range bh1745_readable_ranges[] = …; static const struct regmap_access_table bh1745_readable_regs = …; static const struct regmap_range bh1745_writable_ranges[] = …; static const struct regmap_access_table bh1745_writable_regs = …; static const struct regmap_config bh1745_regmap = …; static const struct iio_event_spec bh1745_event_spec[] = …; #define BH1745_CHANNEL(_colour, _si, _addr) … static const struct iio_chan_spec bh1745_channels[] = …; static int bh1745_reset(struct bh1745_data *data) { … } static int bh1745_power_on(struct bh1745_data *data) { … } static void bh1745_power_off(void *data_ptr) { … } static int bh1745_get_scale(struct bh1745_data *data, int *val, int *val2) { … } static int bh1745_set_scale(struct bh1745_data *data, int val) { … } static int bh1745_get_int_time(struct bh1745_data *data, int *val) { … } static int bh1745_set_int_time(struct bh1745_data *data, int val, int val2) { … } static int bh1745_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int bh1745_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int bh1745_write_raw_get_fmt(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, long mask) { … } static int bh1745_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 int bh1745_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 bh1745_read_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir) { … } static int bh1745_write_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, int state) { … } static int bh1745_read_avail(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 bh1745_info = …; static irqreturn_t bh1745_interrupt_handler(int interrupt, void *p) { … } static irqreturn_t bh1745_trigger_handler(int interrupt, void *p) { … } static int bh1745_setup_triggered_buffer(struct iio_dev *indio_dev, struct device *parent, int irq) { … } static int bh1745_init(struct bh1745_data *data) { … } static int bh1745_probe(struct i2c_client *client) { … } static const struct i2c_device_id bh1745_idtable[] = …; MODULE_DEVICE_TABLE(i2c, bh1745_idtable); static const struct of_device_id bh1745_of_match[] = …; MODULE_DEVICE_TABLE(of, bh1745_of_match); static struct i2c_driver bh1745_driver = …; module_i2c_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_IMPORT_NS(…);
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