linux/drivers/iio/proximity/vl53l0x-i2c.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Support for ST VL53L0X FlightSense ToF Ranging Sensor on a i2c bus.
 *
 * Copyright (C) 2016 STMicroelectronics Imaging Division.
 * Copyright (C) 2018 Song Qiang <[email protected]>
 * Copyright (C) 2020 Ivan Drobyshevskyi <[email protected]>
 *
 * Datasheet available at
 * <https://www.st.com/resource/en/datasheet/vl53l0x.pdf>
 *
 * Default 7-bit i2c slave address 0x29.
 *
 * TODO: FIFO buffer, continuous mode, range selection, sensor ID check.
 */

#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/module.h>

#include <linux/iio/iio.h>

#define VL_REG_SYSRANGE_START …

#define VL_REG_SYSRANGE_MODE_MASK …
#define VL_REG_SYSRANGE_MODE_SINGLESHOT …
#define VL_REG_SYSRANGE_MODE_START_STOP …
#define VL_REG_SYSRANGE_MODE_BACKTOBACK …
#define VL_REG_SYSRANGE_MODE_TIMED …
#define VL_REG_SYSRANGE_MODE_HISTOGRAM …

#define VL_REG_SYSTEM_INTERRUPT_CONFIG_GPIO …
#define VL_REG_SYSTEM_INTERRUPT_GPIO_NEW_SAMPLE_READY …

#define VL_REG_SYSTEM_INTERRUPT_CLEAR …

#define VL_REG_RESULT_INT_STATUS …
#define VL_REG_RESULT_RANGE_STATUS …
#define VL_REG_RESULT_RANGE_STATUS_COMPLETE …

struct vl53l0x_data { … };

static irqreturn_t vl53l0x_handle_irq(int irq, void *priv)
{ … }

static int vl53l0x_configure_irq(struct i2c_client *client,
				 struct iio_dev *indio_dev)
{ … }

static void vl53l0x_clear_irq(struct vl53l0x_data *data)
{ … }

static int vl53l0x_read_proximity(struct vl53l0x_data *data,
				  const struct iio_chan_spec *chan,
				  int *val)
{ … }

static const struct iio_chan_spec vl53l0x_channels[] = …;

static int vl53l0x_read_raw(struct iio_dev *indio_dev,
			    const struct iio_chan_spec *chan,
			    int *val, int *val2, long mask)
{ … }

static const struct iio_info vl53l0x_info = …;

static void vl53l0x_power_off(void *_data)
{ … }

static int vl53l0x_power_on(struct vl53l0x_data *data)
{ … }

static int vl53l0x_probe(struct i2c_client *client)
{ … }

static const struct i2c_device_id vl53l0x_id[] = …;
MODULE_DEVICE_TABLE(i2c, vl53l0x_id);

static const struct of_device_id st_vl53l0x_dt_match[] = …;
MODULE_DEVICE_TABLE(of, st_vl53l0x_dt_match);

static struct i2c_driver vl53l0x_driver = …;
module_i2c_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;