linux/drivers/iio/light/apds9300.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * apds9300.c - IIO driver for Avago APDS9300 ambient light sensor
 *
 * Copyright 2013 Oleksandr Kravchenko <[email protected]>
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/events.h>

#define APDS9300_DRV_NAME …
#define APDS9300_IRQ_NAME …

/* Command register bits */
#define APDS9300_CMD …
#define APDS9300_WORD …
#define APDS9300_CLEAR …

/* Register set */
#define APDS9300_CONTROL …
#define APDS9300_THRESHLOWLOW …
#define APDS9300_THRESHHIGHLOW …
#define APDS9300_INTERRUPT …
#define APDS9300_DATA0LOW …
#define APDS9300_DATA1LOW …

/* Power on/off value for APDS9300_CONTROL register */
#define APDS9300_POWER_ON …
#define APDS9300_POWER_OFF …

/* Interrupts */
#define APDS9300_INTR_ENABLE …
/* Interrupt Persist Function: Any value outside of threshold range */
#define APDS9300_THRESH_INTR …

#define APDS9300_THRESH_MAX …

struct apds9300_data { … };

/* Lux calculation */

/* Calculated values 1000 * (CH1/CH0)^1.4 for CH1/CH0 from 0 to 0.52 */
static const u16 apds9300_lux_ratio[] = …;

static unsigned long apds9300_calculate_lux(u16 ch0, u16 ch1)
{ … }

static int apds9300_get_adc_val(struct apds9300_data *data, int adc_number)
{ … }

static int apds9300_set_thresh_low(struct apds9300_data *data, int value)
{ … }

static int apds9300_set_thresh_hi(struct apds9300_data *data, int value)
{ … }

static int apds9300_set_intr_state(struct apds9300_data *data, int state)
{ … }

static int apds9300_set_power_state(struct apds9300_data *data, int state)
{ … }

static void apds9300_clear_intr(struct apds9300_data *data)
{ … }

static int apds9300_chip_init(struct apds9300_data *data)
{ … }

static int apds9300_read_raw(struct iio_dev *indio_dev,
		struct iio_chan_spec const *chan, int *val, int *val2,
		long mask)
{ … }

static int apds9300_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 apds9300_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 apds9300_read_interrupt_config(struct iio_dev *indio_dev,
		const struct iio_chan_spec *chan,
		enum iio_event_type type,
		enum iio_event_direction dir)
{ … }

static int apds9300_write_interrupt_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 const struct iio_info apds9300_info_no_irq = …;

static const struct iio_info apds9300_info = …;

static const struct iio_event_spec apds9300_event_spec[] = …;

static const struct iio_chan_spec apds9300_channels[] = …;

static irqreturn_t apds9300_interrupt_handler(int irq, void *private)
{ … }

static int apds9300_probe(struct i2c_client *client)
{ … }

static void apds9300_remove(struct i2c_client *client)
{ … }

static int apds9300_suspend(struct device *dev)
{ … }

static int apds9300_resume(struct device *dev)
{ … }

static DEFINE_SIMPLE_DEV_PM_OPS(apds9300_pm_ops, apds9300_suspend,
				apds9300_resume);

static const struct i2c_device_id apds9300_id[] = …;

MODULE_DEVICE_TABLE(i2c, apds9300_id);

static struct i2c_driver apds9300_driver = …;

module_i2c_driver(…) …;

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