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Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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orangepi/linux-orangepi-5.10.y.git/trunk/drivers/iio/light/max44000.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
 * MAX44000 Ambient and Infrared Proximity Sensor
 *
 * Copyright (c) 2016, Intel Corporation.
 *
 * Data sheet: https://datasheets.maximintegrated.com/en/ds/MAX44000.pdf
 *
 * 7-bit I2C slave address 0x4a
 */
 
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/util_macros.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/acpi.h>
 
#define MAX44000_DRV_NAME		"max44000"
 
/* Registers in datasheet order */
#define MAX44000_REG_STATUS		0x00
#define MAX44000_REG_CFG_MAIN		0x01
#define MAX44000_REG_CFG_RX		0x02
#define MAX44000_REG_CFG_TX		0x03
#define MAX44000_REG_ALS_DATA_HI	0x04
#define MAX44000_REG_ALS_DATA_LO	0x05
#define MAX44000_REG_PRX_DATA		0x16
#define MAX44000_REG_ALS_UPTHR_HI	0x06
#define MAX44000_REG_ALS_UPTHR_LO	0x07
#define MAX44000_REG_ALS_LOTHR_HI	0x08
#define MAX44000_REG_ALS_LOTHR_LO	0x09
#define MAX44000_REG_PST		0x0a
#define MAX44000_REG_PRX_IND		0x0b
#define MAX44000_REG_PRX_THR		0x0c
#define MAX44000_REG_TRIM_GAIN_GREEN	0x0f
#define MAX44000_REG_TRIM_GAIN_IR	0x10
 
/* REG_CFG bits */
#define MAX44000_CFG_ALSINTE            0x01
#define MAX44000_CFG_PRXINTE            0x02
#define MAX44000_CFG_MASK               0x1c
#define MAX44000_CFG_MODE_SHUTDOWN      0x00
#define MAX44000_CFG_MODE_ALS_GIR       0x04
#define MAX44000_CFG_MODE_ALS_G         0x08
#define MAX44000_CFG_MODE_ALS_IR        0x0c
#define MAX44000_CFG_MODE_ALS_PRX       0x10
#define MAX44000_CFG_MODE_PRX           0x14
#define MAX44000_CFG_TRIM               0x20
 
/*
 * Upper 4 bits are not documented but start as 1 on powerup
 * Setting them to 0 causes proximity to misbehave so set them to 1
 */
#define MAX44000_REG_CFG_RX_DEFAULT 0xf0
 
/* REG_RX bits */
#define MAX44000_CFG_RX_ALSTIM_MASK	0x0c
#define MAX44000_CFG_RX_ALSTIM_SHIFT	2
#define MAX44000_CFG_RX_ALSPGA_MASK	0x03
#define MAX44000_CFG_RX_ALSPGA_SHIFT	0
 
/* REG_TX bits */
#define MAX44000_LED_CURRENT_MASK	0xf
#define MAX44000_LED_CURRENT_MAX	11
#define MAX44000_LED_CURRENT_DEFAULT	6
 
#define MAX44000_ALSDATA_OVERFLOW	0x4000
 
struct max44000_data {
<------>struct mutex lock;
<------>struct regmap *regmap;
<------>/* Ensure naturally aligned timestamp */
<------>struct {
<------><------>u16 channels[2];
<------><------>s64 ts __aligned(8);
<------>} scan;
};
 
/* Default scale is set to the minimum of 0.03125 or 1 / (1 << 5) lux */
#define MAX44000_ALS_TO_LUX_DEFAULT_FRACTION_LOG2 5
 
/* Scale can be multiplied by up to 128x via ALSPGA for measurement gain */
static const int max44000_alspga_shift[] = {0, 2, 4, 7};
#define MAX44000_ALSPGA_MAX_SHIFT 7
 
/*
 * Scale can be multiplied by up to 64x via ALSTIM because of lost resolution
 *
 * This scaling factor is hidden from userspace and instead accounted for when
 * reading raw values from the device.
 *
 * This makes it possible to cleanly expose ALSPGA as IIO_CHAN_INFO_SCALE and
 * ALSTIM as IIO_CHAN_INFO_INT_TIME without the values affecting each other.
 *
 * Handling this internally is also required for buffer support because the
 * channel's scan_type can't be modified dynamically.
 */
#define MAX44000_ALSTIM_SHIFT(alstim) (2 * (alstim))
 
/* Available integration times with pretty manual alignment: */
static const int max44000_int_time_avail_ns_array[] = {
<------>   100000000,
<------>    25000000,
<------>     6250000,
<------>     1562500,
};
static const char max44000_int_time_avail_str[] =
<------>"0.100 "
<------>"0.025 "
<------>"0.00625 "
<------>"0.0015625";
 
/* Available scales (internal to ulux) with pretty manual alignment: */
static const int max44000_scale_avail_ulux_array[] = {
<------>    31250,
<------>   125000,
<------>   500000,
<------>  4000000,
};
static const char max44000_scale_avail_str[] =
<------>"0.03125 "
<------>"0.125 "
<------>"0.5 "
<------> "4";
 
#define MAX44000_SCAN_INDEX_ALS 0
#define MAX44000_SCAN_INDEX_PRX 1
 
static const struct iio_chan_spec max44000_channels[] = {
<------>{
<------><------>.type = IIO_LIGHT,
<------><------>.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
<------><------>.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
<------><------><------><------><------>    BIT(IIO_CHAN_INFO_INT_TIME),
<------><------>.scan_index = MAX44000_SCAN_INDEX_ALS,
<------><------>.scan_type = {
<------><------><------>.sign		= 'u',
<------><------><------>.realbits	= 14,
<------><------><------>.storagebits	= 16,
<------><------>}
<------>},
<------>{
<------><------>.type = IIO_PROXIMITY,
<------><------>.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
<------><------>.scan_index = MAX44000_SCAN_INDEX_PRX,
<------><------>.scan_type = {
<------><------><------>.sign		= 'u',
<------><------><------>.realbits	= 8,
<------><------><------>.storagebits	= 16,
<------><------>}
<------>},
<------>IIO_CHAN_SOFT_TIMESTAMP(2),
<------>{
<------><------>.type = IIO_CURRENT,
<------><------>.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
<------><------><------><------>      BIT(IIO_CHAN_INFO_SCALE),
<------><------>.extend_name = "led",
<------><------>.output = 1,
<------><------>.scan_index = -1,
<------>},
};
 
static int max44000_read_alstim(struct max44000_data *data)
{
<------>unsigned int val;
<------>int ret;
 
<------>ret = regmap_read(data->regmap, MAX44000_REG_CFG_RX, &val);
<------>if (ret < 0)
<------><------>return ret;
<------>return (val & MAX44000_CFG_RX_ALSTIM_MASK) >> MAX44000_CFG_RX_ALSTIM_SHIFT;
}
 
static int max44000_write_alstim(struct max44000_data *data, int val)
{
<------>return regmap_write_bits(data->regmap, MAX44000_REG_CFG_RX,
<------><------><------><------> MAX44000_CFG_RX_ALSTIM_MASK,
<------><------><------><------> val << MAX44000_CFG_RX_ALSTIM_SHIFT);
}
 
static int max44000_read_alspga(struct max44000_data *data)
{
<------>unsigned int val;
<------>int ret;
 
<------>ret = regmap_read(data->regmap, MAX44000_REG_CFG_RX, &val);
<------>if (ret < 0)
<------><------>return ret;
<------>return (val & MAX44000_CFG_RX_ALSPGA_MASK) >> MAX44000_CFG_RX_ALSPGA_SHIFT;
}
 
static int max44000_write_alspga(struct max44000_data *data, int val)
{
<------>return regmap_write_bits(data->regmap, MAX44000_REG_CFG_RX,
<------><------><------><------> MAX44000_CFG_RX_ALSPGA_MASK,
<------><------><------><------> val << MAX44000_CFG_RX_ALSPGA_SHIFT);
}
 
static int max44000_read_alsval(struct max44000_data *data)
{
<------>u16 regval;
<------>__be16 val;
<------>int alstim, ret;
 
<------>ret = regmap_bulk_read(data->regmap, MAX44000_REG_ALS_DATA_HI,
<------><------><------>       &val, sizeof(val));
<------>if (ret < 0)
<------><------>return ret;
<------>alstim = ret = max44000_read_alstim(data);
<------>if (ret < 0)
<------><------>return ret;
 
<------>regval = be16_to_cpu(val);
 
<------>/*
<------> * Overflow is explained on datasheet page 17.
<------> *
<------> * It's a warning that either the G or IR channel has become saturated
<------> * and that the value in the register is likely incorrect.
<------> *
<------> * The recommendation is to change the scale (ALSPGA).
<------> * The driver just returns the max representable value.
<------> */
<------>if (regval & MAX44000_ALSDATA_OVERFLOW)
<------><------>return 0x3FFF;
 
<------>return regval << MAX44000_ALSTIM_SHIFT(alstim);
}
 
static int max44000_write_led_current_raw(struct max44000_data *data, int val)
{
<------>/* Maybe we should clamp the value instead? */
<------>if (val < 0 || val > MAX44000_LED_CURRENT_MAX)
<------><------>return -ERANGE;
<------>if (val >= 8)
<------><------>val += 4;
<------>return regmap_write_bits(data->regmap, MAX44000_REG_CFG_TX,
<------><------><------><------> MAX44000_LED_CURRENT_MASK, val);
}
 
static int max44000_read_led_current_raw(struct max44000_data *data)
{
<------>unsigned int regval;
<------>int ret;
 
<------>ret = regmap_read(data->regmap, MAX44000_REG_CFG_TX, &regval);
<------>if (ret < 0)
<------><------>return ret;
<------>regval &= MAX44000_LED_CURRENT_MASK;
<------>if (regval >= 8)
<------><------>regval -= 4;
<------>return regval;
}
 
static int max44000_read_raw(struct iio_dev *indio_dev,
<------><------><------>     struct iio_chan_spec const *chan,
<------><------><------>     int *val, int *val2, long mask)
{
<------>struct max44000_data *data = iio_priv(indio_dev);
<------>int alstim, alspga;
<------>unsigned int regval;
<------>int ret;
 
<------>switch (mask) {
<------>case IIO_CHAN_INFO_RAW:
<------><------>switch (chan->type) {
<------><------>case IIO_LIGHT:
<------><------><------>mutex_lock(&data->lock);
<------><------><------>ret = max44000_read_alsval(data);
<------><------><------>mutex_unlock(&data->lock);
<------><------><------>if (ret < 0)
<------><------><------><------>return ret;
<------><------><------>*val = ret;
<------><------><------>return IIO_VAL_INT;
 
<------><------>case IIO_PROXIMITY:
<------><------><------>mutex_lock(&data->lock);
<------><------><------>ret = regmap_read(data->regmap, MAX44000_REG_PRX_DATA, &regval);
<------><------><------>mutex_unlock(&data->lock);
<------><------><------>if (ret < 0)
<------><------><------><------>return ret;
<------><------><------>*val = regval;
<------><------><------>return IIO_VAL_INT;
 
<------><------>case IIO_CURRENT:
<------><------><------>mutex_lock(&data->lock);
<------><------><------>ret = max44000_read_led_current_raw(data);
<------><------><------>mutex_unlock(&data->lock);
<------><------><------>if (ret < 0)
<------><------><------><------>return ret;
<------><------><------>*val = ret;
<------><------><------>return IIO_VAL_INT;
 
<------><------>default:
<------><------><------>return -EINVAL;
<------><------>}
 
<------>case IIO_CHAN_INFO_SCALE:
<------><------>switch (chan->type) {
<------><------>case IIO_CURRENT:
<------><------><------>/* Output register is in 10s of miliamps */
<------><------><------>*val = 10;
<------><------><------>return IIO_VAL_INT;
 
<------><------>case IIO_LIGHT:
<------><------><------>mutex_lock(&data->lock);
<------><------><------>alspga = ret = max44000_read_alspga(data);
<------><------><------>mutex_unlock(&data->lock);
<------><------><------>if (ret < 0)
<------><------><------><------>return ret;
 
<------><------><------>/* Avoid negative shifts */
<------><------><------>*val = (1 << MAX44000_ALSPGA_MAX_SHIFT);
<------><------><------>*val2 = MAX44000_ALS_TO_LUX_DEFAULT_FRACTION_LOG2
<------><------><------><------><------>+ MAX44000_ALSPGA_MAX_SHIFT
<------><------><------><------><------>- max44000_alspga_shift[alspga];
<------><------><------>return IIO_VAL_FRACTIONAL_LOG2;
 
<------><------>default:
<------><------><------>return -EINVAL;
<------><------>}
 
<------>case IIO_CHAN_INFO_INT_TIME:
<------><------>mutex_lock(&data->lock);
<------><------>alstim = ret = max44000_read_alstim(data);
<------><------>mutex_unlock(&data->lock);
 
<------><------>if (ret < 0)
<------><------><------>return ret;
<------><------>*val = 0;
<------><------>*val2 = max44000_int_time_avail_ns_array[alstim];
<------><------>return IIO_VAL_INT_PLUS_NANO;
 
<------>default:
<------><------>return -EINVAL;
<------>}
}
 
static int max44000_write_raw(struct iio_dev *indio_dev,
<------><------><------>      struct iio_chan_spec const *chan,
<------><------><------>      int val, int val2, long mask)
{
<------>struct max44000_data *data = iio_priv(indio_dev);
<------>int ret;
 
<------>if (mask == IIO_CHAN_INFO_RAW && chan->type == IIO_CURRENT) {
<------><------>mutex_lock(&data->lock);
<------><------>ret = max44000_write_led_current_raw(data, val);
<------><------>mutex_unlock(&data->lock);
<------><------>return ret;
<------>} else if (mask == IIO_CHAN_INFO_INT_TIME && chan->type == IIO_LIGHT) {
<------><------>s64 valns = val * NSEC_PER_SEC + val2;
<------><------>int alstim = find_closest_descending(valns,
<------><------><------><------>max44000_int_time_avail_ns_array,
<------><------><------><------>ARRAY_SIZE(max44000_int_time_avail_ns_array));
<------><------>mutex_lock(&data->lock);
<------><------>ret = max44000_write_alstim(data, alstim);
<------><------>mutex_unlock(&data->lock);
<------><------>return ret;
<------>} else if (mask == IIO_CHAN_INFO_SCALE && chan->type == IIO_LIGHT) {
<------><------>s64 valus = val * USEC_PER_SEC + val2;
<------><------>int alspga = find_closest(valus,
<------><------><------><------>max44000_scale_avail_ulux_array,
<------><------><------><------>ARRAY_SIZE(max44000_scale_avail_ulux_array));
<------><------>mutex_lock(&data->lock);
<------><------>ret = max44000_write_alspga(data, alspga);
<------><------>mutex_unlock(&data->lock);
<------><------>return ret;
<------>}
 
<------>return -EINVAL;
}
 
static int max44000_write_raw_get_fmt(struct iio_dev *indio_dev,
<------><------><------><------>      struct iio_chan_spec const *chan,
<------><------><------><------>      long mask)
{
<------>if (mask == IIO_CHAN_INFO_INT_TIME && chan->type == IIO_LIGHT)
<------><------>return IIO_VAL_INT_PLUS_NANO;
<------>else if (mask == IIO_CHAN_INFO_SCALE && chan->type == IIO_LIGHT)
<------><------>return IIO_VAL_INT_PLUS_MICRO;
<------>else
<------><------>return IIO_VAL_INT;
}
 
static IIO_CONST_ATTR(illuminance_integration_time_available, max44000_int_time_avail_str);
static IIO_CONST_ATTR(illuminance_scale_available, max44000_scale_avail_str);
 
static struct attribute *max44000_attributes[] = {
<------>&iio_const_attr_illuminance_integration_time_available.dev_attr.attr,
<------>&iio_const_attr_illuminance_scale_available.dev_attr.attr,
<------>NULL
};
 
static const struct attribute_group max44000_attribute_group = {
<------>.attrs = max44000_attributes,
};
 
static const struct iio_info max44000_info = {
<------>.read_raw		= max44000_read_raw,
<------>.write_raw		= max44000_write_raw,
<------>.write_raw_get_fmt	= max44000_write_raw_get_fmt,
<------>.attrs			= &max44000_attribute_group,
};
 
static bool max44000_readable_reg(struct device *dev, unsigned int reg)
{
<------>switch (reg) {
<------>case MAX44000_REG_STATUS:
<------>case MAX44000_REG_CFG_MAIN:
<------>case MAX44000_REG_CFG_RX:
<------>case MAX44000_REG_CFG_TX:
<------>case MAX44000_REG_ALS_DATA_HI:
<------>case MAX44000_REG_ALS_DATA_LO:
<------>case MAX44000_REG_PRX_DATA:
<------>case MAX44000_REG_ALS_UPTHR_HI:
<------>case MAX44000_REG_ALS_UPTHR_LO:
<------>case MAX44000_REG_ALS_LOTHR_HI:
<------>case MAX44000_REG_ALS_LOTHR_LO:
<------>case MAX44000_REG_PST:
<------>case MAX44000_REG_PRX_IND:
<------>case MAX44000_REG_PRX_THR:
<------>case MAX44000_REG_TRIM_GAIN_GREEN:
<------>case MAX44000_REG_TRIM_GAIN_IR:
<------><------>return true;
<------>default:
<------><------>return false;
<------>}
}
 
static bool max44000_writeable_reg(struct device *dev, unsigned int reg)
{
<------>switch (reg) {
<------>case MAX44000_REG_CFG_MAIN:
<------>case MAX44000_REG_CFG_RX:
<------>case MAX44000_REG_CFG_TX:
<------>case MAX44000_REG_ALS_UPTHR_HI:
<------>case MAX44000_REG_ALS_UPTHR_LO:
<------>case MAX44000_REG_ALS_LOTHR_HI:
<------>case MAX44000_REG_ALS_LOTHR_LO:
<------>case MAX44000_REG_PST:
<------>case MAX44000_REG_PRX_IND:
<------>case MAX44000_REG_PRX_THR:
<------>case MAX44000_REG_TRIM_GAIN_GREEN:
<------>case MAX44000_REG_TRIM_GAIN_IR:
<------><------>return true;
<------>default:
<------><------>return false;
<------>}
}
 
static bool max44000_volatile_reg(struct device *dev, unsigned int reg)
{
<------>switch (reg) {
<------>case MAX44000_REG_STATUS:
<------>case MAX44000_REG_ALS_DATA_HI:
<------>case MAX44000_REG_ALS_DATA_LO:
<------>case MAX44000_REG_PRX_DATA:
<------><------>return true;
<------>default:
<------><------>return false;
<------>}
}
 
static bool max44000_precious_reg(struct device *dev, unsigned int reg)
{
<------>return reg == MAX44000_REG_STATUS;
}
 
static const struct regmap_config max44000_regmap_config = {
<------>.reg_bits		= 8,
<------>.val_bits		= 8,
 
<------>.max_register		= MAX44000_REG_PRX_DATA,
<------>.readable_reg		= max44000_readable_reg,
<------>.writeable_reg		= max44000_writeable_reg,
<------>.volatile_reg		= max44000_volatile_reg,
<------>.precious_reg		= max44000_precious_reg,
 
<------>.use_single_read	= true,
<------>.use_single_write	= true,
<------>.cache_type		= REGCACHE_RBTREE,
};
 
static irqreturn_t max44000_trigger_handler(int irq, void *p)
{
<------>struct iio_poll_func *pf = p;
<------>struct iio_dev *indio_dev = pf->indio_dev;
<------>struct max44000_data *data = iio_priv(indio_dev);
<------>int index = 0;
<------>unsigned int regval;
<------>int ret;
 
<------>mutex_lock(&data->lock);
<------>if (test_bit(MAX44000_SCAN_INDEX_ALS, indio_dev->active_scan_mask)) {
<------><------>ret = max44000_read_alsval(data);
<------><------>if (ret < 0)
<------><------><------>goto out_unlock;
<------><------>data->scan.channels[index++] = ret;
<------>}
<------>if (test_bit(MAX44000_SCAN_INDEX_PRX, indio_dev->active_scan_mask)) {
<------><------>ret = regmap_read(data->regmap, MAX44000_REG_PRX_DATA, &regval);
<------><------>if (ret < 0)
<------><------><------>goto out_unlock;
<------><------>data->scan.channels[index] = regval;
<------>}
<------>mutex_unlock(&data->lock);
 
<------>iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
<------><------><------><------><------>   iio_get_time_ns(indio_dev));
<------>iio_trigger_notify_done(indio_dev->trig);
<------>return IRQ_HANDLED;
 
out_unlock:
<------>mutex_unlock(&data->lock);
<------>iio_trigger_notify_done(indio_dev->trig);
<------>return IRQ_HANDLED;
}
 
static int max44000_probe(struct i2c_client *client,
<------><------><------>  const struct i2c_device_id *id)
{
<------>struct max44000_data *data;
<------>struct iio_dev *indio_dev;
<------>int ret, reg;
 
<------>indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
<------>if (!indio_dev)
<------><------>return -ENOMEM;
<------>data = iio_priv(indio_dev);
<------>data->regmap = devm_regmap_init_i2c(client, &max44000_regmap_config);
<------>if (IS_ERR(data->regmap)) {
<------><------>dev_err(&client->dev, "regmap_init failed!\n");
<------><------>return PTR_ERR(data->regmap);
<------>}
 
<------>i2c_set_clientdata(client, indio_dev);
<------>mutex_init(&data->lock);
<------>indio_dev->info = &max44000_info;
<------>indio_dev->name = MAX44000_DRV_NAME;
<------>indio_dev->channels = max44000_channels;
<------>indio_dev->num_channels = ARRAY_SIZE(max44000_channels);
 
<------>/*
<------> * The device doesn't have a reset function so we just clear some
<------> * important bits at probe time to ensure sane operation.
<------> *
<------> * Since we don't support interrupts/events the threshold values are
<------> * not important. We also don't touch trim values.
<------> */
 
<------>/* Reset ALS scaling bits */
<------>ret = regmap_write(data->regmap, MAX44000_REG_CFG_RX,
<------><------><------>   MAX44000_REG_CFG_RX_DEFAULT);
<------>if (ret < 0) {
<------><------>dev_err(&client->dev, "failed to write default CFG_RX: %d\n",
<------><------><------>ret);
<------><------>return ret;
<------>}
 
<------>/*
<------> * By default the LED pulse used for the proximity sensor is disabled.
<------> * Set a middle value so that we get some sort of valid data by default.
<------> */
<------>ret = max44000_write_led_current_raw(data, MAX44000_LED_CURRENT_DEFAULT);
<------>if (ret < 0) {
<------><------>dev_err(&client->dev, "failed to write init config: %d\n", ret);
<------><------>return ret;
<------>}
 
<------>/* Reset CFG bits to ALS_PRX mode which allows easy reading of both values. */
<------>reg = MAX44000_CFG_TRIM | MAX44000_CFG_MODE_ALS_PRX;
<------>ret = regmap_write(data->regmap, MAX44000_REG_CFG_MAIN, reg);
<------>if (ret < 0) {
<------><------>dev_err(&client->dev, "failed to write init config: %d\n", ret);
<------><------>return ret;
<------>}
 
<------>/* Read status at least once to clear any stale interrupt bits. */
<------>ret = regmap_read(data->regmap, MAX44000_REG_STATUS, &reg);
<------>if (ret < 0) {
<------><------>dev_err(&client->dev, "failed to read init status: %d\n", ret);
<------><------>return ret;
<------>}
 
<------>ret = iio_triggered_buffer_setup(indio_dev, NULL, max44000_trigger_handler, NULL);
<------>if (ret < 0) {
<------><------>dev_err(&client->dev, "iio triggered buffer setup failed\n");
<------><------>return ret;
<------>}
 
<------>return iio_device_register(indio_dev);
}
 
static int max44000_remove(struct i2c_client *client)
{
<------>struct iio_dev *indio_dev = i2c_get_clientdata(client);
 
<------>iio_device_unregister(indio_dev);
<------>iio_triggered_buffer_cleanup(indio_dev);
 
<------>return 0;
}
 
static const struct i2c_device_id max44000_id[] = {
<------>{"max44000", 0},
<------>{ }
};
MODULE_DEVICE_TABLE(i2c, max44000_id);
 
#ifdef CONFIG_ACPI
static const struct acpi_device_id max44000_acpi_match[] = {
<------>{"MAX44000", 0},
<------>{ }
};
MODULE_DEVICE_TABLE(acpi, max44000_acpi_match);
#endif
 
static struct i2c_driver max44000_driver = {
<------>.driver = {
<------><------>.name	= MAX44000_DRV_NAME,
<------><------>.acpi_match_table = ACPI_PTR(max44000_acpi_match),
<------>},
<------>.probe		= max44000_probe,
<------>.remove		= max44000_remove,
<------>.id_table	= max44000_id,
};
 
module_i2c_driver(max44000_driver);
 
MODULE_AUTHOR("Crestez Dan Leonard <leonard.crestez@intel.com>");
MODULE_DESCRIPTION("MAX44000 Ambient and Infrared Proximity Sensor");
MODULE_LICENSE("GPL v2");
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