// SPDX-License-Identifier: GPL-2.0 /* * isl29501.c: ISL29501 Time of Flight sensor driver. * * Copyright (C) 2018 * Author: Mathieu Othacehe <[email protected]> * * 7-bit I2C slave address: 0x57 */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/err.h> #include <linux/mod_devicetable.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/buffer.h> #include <linux/iio/triggered_buffer.h> /* Control, setting and status registers */ #define ISL29501_DEVICE_ID … #define ISL29501_ID … /* Sampling control registers */ #define ISL29501_INTEGRATION_PERIOD … #define ISL29501_SAMPLE_PERIOD … /* Closed loop calibration registers */ #define ISL29501_CROSSTALK_I_MSB … #define ISL29501_CROSSTALK_I_LSB … #define ISL29501_CROSSTALK_I_EXPONENT … #define ISL29501_CROSSTALK_Q_MSB … #define ISL29501_CROSSTALK_Q_LSB … #define ISL29501_CROSSTALK_Q_EXPONENT … #define ISL29501_CROSSTALK_GAIN_MSB … #define ISL29501_CROSSTALK_GAIN_LSB … #define ISL29501_MAGNITUDE_REF_EXP … #define ISL29501_MAGNITUDE_REF_MSB … #define ISL29501_MAGNITUDE_REF_LSB … #define ISL29501_PHASE_OFFSET_MSB … #define ISL29501_PHASE_OFFSET_LSB … /* Analog control registers */ #define ISL29501_DRIVER_RANGE … #define ISL29501_EMITTER_DAC … #define ISL29501_COMMAND_REGISTER … /* Commands */ #define ISL29501_EMUL_SAMPLE_START_PIN … #define ISL29501_RESET_ALL_REGISTERS … #define ISL29501_RESET_INT_SM … /* Ambiant light and temperature corrections */ #define ISL29501_TEMP_REFERENCE … #define ISL29501_PHASE_EXPONENT … #define ISL29501_TEMP_COEFF_A … #define ISL29501_TEMP_COEFF_B … #define ISL29501_AMBIANT_COEFF_A … #define ISL29501_AMBIANT_COEFF_B … /* Data output registers */ #define ISL29501_DISTANCE_MSB_DATA … #define ISL29501_DISTANCE_LSB_DATA … #define ISL29501_PRECISION_MSB … #define ISL29501_PRECISION_LSB … #define ISL29501_MAGNITUDE_EXPONENT … #define ISL29501_MAGNITUDE_MSB … #define ISL29501_MAGNITUDE_LSB … #define ISL29501_PHASE_MSB … #define ISL29501_PHASE_LSB … #define ISL29501_I_RAW_EXPONENT … #define ISL29501_I_RAW_MSB … #define ISL29501_I_RAW_LSB … #define ISL29501_Q_RAW_EXPONENT … #define ISL29501_Q_RAW_MSB … #define ISL29501_Q_RAW_LSB … #define ISL29501_DIE_TEMPERATURE … #define ISL29501_AMBIENT_LIGHT … #define ISL29501_GAIN_MSB … #define ISL29501_GAIN_LSB … #define ISL29501_MAX_EXP_VAL … #define ISL29501_INT_TIME_AVAILABLE … #define ISL29501_CURRENT_SCALE_AVAILABLE … enum isl29501_correction_coeff { … }; struct isl29501_private { … }; enum isl29501_register_name { … }; struct isl29501_register_desc { … }; static const struct isl29501_register_desc isl29501_registers[] = …; static int isl29501_register_read(struct isl29501_private *isl29501, enum isl29501_register_name name, u32 *val) { … } static u32 isl29501_register_write(struct isl29501_private *isl29501, enum isl29501_register_name name, u32 value) { … } static ssize_t isl29501_read_ext(struct iio_dev *indio_dev, uintptr_t private, const struct iio_chan_spec *chan, char *buf) { … } static int isl29501_set_shadow_coeff(struct isl29501_private *isl29501, enum isl29501_register_name reg, unsigned int val) { … } static int isl29501_write_coeff(struct isl29501_private *isl29501, enum isl29501_correction_coeff coeff, int val) { … } static unsigned int isl29501_find_corr_exp(unsigned int val, unsigned int max_exp, unsigned int max_mantissa) { … } static ssize_t isl29501_write_ext(struct iio_dev *indio_dev, uintptr_t private, const struct iio_chan_spec *chan, const char *buf, size_t len) { … } #define _ISL29501_EXT_INFO(_name, _ident) … static const struct iio_chan_spec_ext_info isl29501_ext_info[] = …; #define ISL29501_DISTANCE_SCAN_INDEX … #define ISL29501_TIMESTAMP_SCAN_INDEX … static const struct iio_chan_spec isl29501_channels[] = …; static int isl29501_reset_registers(struct isl29501_private *isl29501) { … } static int isl29501_begin_acquisition(struct isl29501_private *isl29501) { … } static IIO_CONST_ATTR_INT_TIME_AVAIL(ISL29501_INT_TIME_AVAILABLE); static IIO_CONST_ATTR(out_current_scale_available, ISL29501_CURRENT_SCALE_AVAILABLE); static struct attribute *isl29501_attributes[] = …; static const struct attribute_group isl29501_attribute_group = …; static const int isl29501_current_scale_table[][2] = …; static const int isl29501_int_time[][2] = …; static int isl29501_get_raw(struct isl29501_private *isl29501, const struct iio_chan_spec *chan, int *raw) { … } static int isl29501_get_scale(struct isl29501_private *isl29501, const struct iio_chan_spec *chan, int *val, int *val2) { … } static int isl29501_get_calibbias(struct isl29501_private *isl29501, const struct iio_chan_spec *chan, int *bias) { … } static int isl29501_get_inttime(struct isl29501_private *isl29501, int *val, int *val2) { … } static int isl29501_get_freq(struct isl29501_private *isl29501, int *val, int *val2) { … } static int isl29501_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int isl29501_set_raw(struct isl29501_private *isl29501, const struct iio_chan_spec *chan, int raw) { … } static int isl29501_set_inttime(struct isl29501_private *isl29501, int val, int val2) { … } static int isl29501_set_scale(struct isl29501_private *isl29501, const struct iio_chan_spec *chan, int val, int val2) { … } static int isl29501_set_calibbias(struct isl29501_private *isl29501, const struct iio_chan_spec *chan, int bias) { … } static int isl29501_set_freq(struct isl29501_private *isl29501, int val, int val2) { … } static int isl29501_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static const struct iio_info isl29501_info = …; static int isl29501_init_chip(struct isl29501_private *isl29501) { … } static irqreturn_t isl29501_trigger_handler(int irq, void *p) { … } static int isl29501_probe(struct i2c_client *client) { … } static const struct i2c_device_id isl29501_id[] = …; MODULE_DEVICE_TABLE(i2c, isl29501_id); static const struct of_device_id isl29501_i2c_matches[] = …; MODULE_DEVICE_TABLE(of, isl29501_i2c_matches); static struct i2c_driver isl29501_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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