538 lines
13 KiB
C
538 lines
13 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* Senseair Sunrise 006-0-0007 CO2 sensor driver.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2021 Jacopo Mondi
|
||
|
|
*
|
||
|
|
* List of features not yet supported by the driver:
|
||
|
|
* - controllable EN pin
|
||
|
|
* - single-shot operations using the nDRY pin.
|
||
|
|
* - ABC/target calibration
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/bitops.h>
|
||
|
|
#include <linux/i2c.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/mod_devicetable.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/mutex.h>
|
||
|
|
#include <linux/regmap.h>
|
||
|
|
#include <linux/time64.h>
|
||
|
|
|
||
|
|
#include <linux/iio/iio.h>
|
||
|
|
|
||
|
|
#define DRIVER_NAME "sunrise_co2"
|
||
|
|
|
||
|
|
#define SUNRISE_ERROR_STATUS_REG 0x00
|
||
|
|
#define SUNRISE_CO2_FILTERED_COMP_REG 0x06
|
||
|
|
#define SUNRISE_CHIP_TEMPERATURE_REG 0x08
|
||
|
|
#define SUNRISE_CALIBRATION_STATUS_REG 0x81
|
||
|
|
#define SUNRISE_CALIBRATION_COMMAND_REG 0x82
|
||
|
|
#define SUNRISE_CALIBRATION_FACTORY_CMD 0x7c02
|
||
|
|
#define SUNRISE_CALIBRATION_BACKGROUND_CMD 0x7c06
|
||
|
|
/*
|
||
|
|
* The calibration timeout is not characterized in the datasheet.
|
||
|
|
* Use 30 seconds as a reasonable upper limit.
|
||
|
|
*/
|
||
|
|
#define SUNRISE_CALIBRATION_TIMEOUT_US (30 * USEC_PER_SEC)
|
||
|
|
|
||
|
|
struct sunrise_dev {
|
||
|
|
struct i2c_client *client;
|
||
|
|
struct regmap *regmap;
|
||
|
|
/* Protects access to IIO attributes. */
|
||
|
|
struct mutex lock;
|
||
|
|
bool ignore_nak;
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Custom regmap read/write operations: perform unlocked access to the i2c bus. */
|
||
|
|
|
||
|
|
static int sunrise_regmap_read(void *context, const void *reg_buf,
|
||
|
|
size_t reg_size, void *val_buf, size_t val_size)
|
||
|
|
{
|
||
|
|
struct i2c_client *client = context;
|
||
|
|
struct sunrise_dev *sunrise = i2c_get_clientdata(client);
|
||
|
|
union i2c_smbus_data data;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (reg_size != 1 || !val_size)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
memset(&data, 0, sizeof(data));
|
||
|
|
data.block[0] = val_size;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Wake up sensor by sending sensor address: START, sensor address,
|
||
|
|
* STOP. Sensor will not ACK this byte.
|
||
|
|
*
|
||
|
|
* The chip enters a low power state after 15ms without
|
||
|
|
* communications or after a complete read/write sequence.
|
||
|
|
*/
|
||
|
|
__i2c_smbus_xfer(client->adapter, client->addr,
|
||
|
|
sunrise->ignore_nak ? I2C_M_IGNORE_NAK : 0,
|
||
|
|
I2C_SMBUS_WRITE, 0, I2C_SMBUS_BYTE_DATA, &data);
|
||
|
|
|
||
|
|
usleep_range(500, 1500);
|
||
|
|
|
||
|
|
ret = __i2c_smbus_xfer(client->adapter, client->addr, client->flags,
|
||
|
|
I2C_SMBUS_READ, ((u8 *)reg_buf)[0],
|
||
|
|
I2C_SMBUS_I2C_BLOCK_DATA, &data);
|
||
|
|
if (ret < 0)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
memcpy(val_buf, &data.block[1], data.block[0]);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sunrise_regmap_write(void *context, const void *val_buf, size_t count)
|
||
|
|
{
|
||
|
|
struct i2c_client *client = context;
|
||
|
|
struct sunrise_dev *sunrise = i2c_get_clientdata(client);
|
||
|
|
union i2c_smbus_data data;
|
||
|
|
|
||
|
|
/* Discard reg address from values count. */
|
||
|
|
if (!count)
|
||
|
|
return -EINVAL;
|
||
|
|
count--;
|
||
|
|
|
||
|
|
memset(&data, 0, sizeof(data));
|
||
|
|
data.block[0] = count;
|
||
|
|
memcpy(&data.block[1], (u8 *)val_buf + 1, count);
|
||
|
|
|
||
|
|
__i2c_smbus_xfer(client->adapter, client->addr,
|
||
|
|
sunrise->ignore_nak ? I2C_M_IGNORE_NAK : 0,
|
||
|
|
I2C_SMBUS_WRITE, 0, I2C_SMBUS_BYTE_DATA, &data);
|
||
|
|
|
||
|
|
usleep_range(500, 1500);
|
||
|
|
|
||
|
|
return __i2c_smbus_xfer(client->adapter, client->addr, client->flags,
|
||
|
|
I2C_SMBUS_WRITE, ((u8 *)val_buf)[0],
|
||
|
|
I2C_SMBUS_I2C_BLOCK_DATA, &data);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Sunrise i2c read/write operations: lock the i2c segment to avoid losing the
|
||
|
|
* wake up session. Use custom regmap operations that perform unlocked access to
|
||
|
|
* the i2c bus.
|
||
|
|
*/
|
||
|
|
static int sunrise_read_byte(struct sunrise_dev *sunrise, u8 reg)
|
||
|
|
{
|
||
|
|
const struct i2c_client *client = sunrise->client;
|
||
|
|
const struct device *dev = &client->dev;
|
||
|
|
unsigned int val;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
|
||
|
|
ret = regmap_read(sunrise->regmap, reg, &val);
|
||
|
|
i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
|
||
|
|
if (ret) {
|
||
|
|
dev_err(dev, "Read byte failed: reg 0x%02x (%d)\n", reg, ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return val;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sunrise_read_word(struct sunrise_dev *sunrise, u8 reg, u16 *val)
|
||
|
|
{
|
||
|
|
const struct i2c_client *client = sunrise->client;
|
||
|
|
const struct device *dev = &client->dev;
|
||
|
|
__be16 be_val;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
|
||
|
|
ret = regmap_bulk_read(sunrise->regmap, reg, &be_val, sizeof(be_val));
|
||
|
|
i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
|
||
|
|
if (ret) {
|
||
|
|
dev_err(dev, "Read word failed: reg 0x%02x (%d)\n", reg, ret);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
*val = be16_to_cpu(be_val);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sunrise_write_byte(struct sunrise_dev *sunrise, u8 reg, u8 val)
|
||
|
|
{
|
||
|
|
const struct i2c_client *client = sunrise->client;
|
||
|
|
const struct device *dev = &client->dev;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
|
||
|
|
ret = regmap_write(sunrise->regmap, reg, val);
|
||
|
|
i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
|
||
|
|
if (ret)
|
||
|
|
dev_err(dev, "Write byte failed: reg 0x%02x (%d)\n", reg, ret);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int sunrise_write_word(struct sunrise_dev *sunrise, u8 reg, u16 data)
|
||
|
|
{
|
||
|
|
const struct i2c_client *client = sunrise->client;
|
||
|
|
const struct device *dev = &client->dev;
|
||
|
|
__be16 be_data = cpu_to_be16(data);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
i2c_lock_bus(client->adapter, I2C_LOCK_SEGMENT);
|
||
|
|
ret = regmap_bulk_write(sunrise->regmap, reg, &be_data, sizeof(be_data));
|
||
|
|
i2c_unlock_bus(client->adapter, I2C_LOCK_SEGMENT);
|
||
|
|
if (ret)
|
||
|
|
dev_err(dev, "Write word failed: reg 0x%02x (%d)\n", reg, ret);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Trigger a calibration cycle. */
|
||
|
|
|
||
|
|
enum {
|
||
|
|
SUNRISE_CALIBRATION_FACTORY,
|
||
|
|
SUNRISE_CALIBRATION_BACKGROUND,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct sunrise_calib_data {
|
||
|
|
u16 cmd;
|
||
|
|
u8 bit;
|
||
|
|
const char * const name;
|
||
|
|
} calib_data[] = {
|
||
|
|
[SUNRISE_CALIBRATION_FACTORY] = {
|
||
|
|
SUNRISE_CALIBRATION_FACTORY_CMD,
|
||
|
|
BIT(2),
|
||
|
|
"factory_calibration",
|
||
|
|
},
|
||
|
|
[SUNRISE_CALIBRATION_BACKGROUND] = {
|
||
|
|
SUNRISE_CALIBRATION_BACKGROUND_CMD,
|
||
|
|
BIT(5),
|
||
|
|
"background_calibration",
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static int sunrise_calibrate(struct sunrise_dev *sunrise,
|
||
|
|
const struct sunrise_calib_data *data)
|
||
|
|
{
|
||
|
|
unsigned int status;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* Reset the calibration status reg. */
|
||
|
|
ret = sunrise_write_byte(sunrise, SUNRISE_CALIBRATION_STATUS_REG, 0x00);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
/* Write a calibration command and poll the calibration status bit. */
|
||
|
|
ret = sunrise_write_word(sunrise, SUNRISE_CALIBRATION_COMMAND_REG, data->cmd);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
dev_dbg(&sunrise->client->dev, "%s in progress\n", data->name);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Calibration takes several seconds, so the sleep time between reads
|
||
|
|
* can be pretty relaxed.
|
||
|
|
*/
|
||
|
|
return read_poll_timeout(sunrise_read_byte, status, status & data->bit,
|
||
|
|
200000, SUNRISE_CALIBRATION_TIMEOUT_US, false,
|
||
|
|
sunrise, SUNRISE_CALIBRATION_STATUS_REG);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t sunrise_cal_factory_write(struct iio_dev *iiodev,
|
||
|
|
uintptr_t private,
|
||
|
|
const struct iio_chan_spec *chan,
|
||
|
|
const char *buf, size_t len)
|
||
|
|
{
|
||
|
|
struct sunrise_dev *sunrise = iio_priv(iiodev);
|
||
|
|
bool enable;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = kstrtobool(buf, &enable);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
if (!enable)
|
||
|
|
return len;
|
||
|
|
|
||
|
|
mutex_lock(&sunrise->lock);
|
||
|
|
ret = sunrise_calibrate(sunrise, &calib_data[SUNRISE_CALIBRATION_FACTORY]);
|
||
|
|
mutex_unlock(&sunrise->lock);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
static ssize_t sunrise_cal_background_write(struct iio_dev *iiodev,
|
||
|
|
uintptr_t private,
|
||
|
|
const struct iio_chan_spec *chan,
|
||
|
|
const char *buf, size_t len)
|
||
|
|
{
|
||
|
|
struct sunrise_dev *sunrise = iio_priv(iiodev);
|
||
|
|
bool enable;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = kstrtobool(buf, &enable);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
if (!enable)
|
||
|
|
return len;
|
||
|
|
|
||
|
|
mutex_lock(&sunrise->lock);
|
||
|
|
ret = sunrise_calibrate(sunrise, &calib_data[SUNRISE_CALIBRATION_BACKGROUND]);
|
||
|
|
mutex_unlock(&sunrise->lock);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Enumerate and retrieve the chip error status. */
|
||
|
|
enum {
|
||
|
|
SUNRISE_ERROR_FATAL,
|
||
|
|
SUNRISE_ERROR_I2C,
|
||
|
|
SUNRISE_ERROR_ALGORITHM,
|
||
|
|
SUNRISE_ERROR_CALIBRATION,
|
||
|
|
SUNRISE_ERROR_SELF_DIAGNOSTIC,
|
||
|
|
SUNRISE_ERROR_OUT_OF_RANGE,
|
||
|
|
SUNRISE_ERROR_MEMORY,
|
||
|
|
SUNRISE_ERROR_NO_MEASUREMENT,
|
||
|
|
SUNRISE_ERROR_LOW_VOLTAGE,
|
||
|
|
SUNRISE_ERROR_MEASUREMENT_TIMEOUT,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const char * const sunrise_error_statuses[] = {
|
||
|
|
[SUNRISE_ERROR_FATAL] = "error_fatal",
|
||
|
|
[SUNRISE_ERROR_I2C] = "error_i2c",
|
||
|
|
[SUNRISE_ERROR_ALGORITHM] = "error_algorithm",
|
||
|
|
[SUNRISE_ERROR_CALIBRATION] = "error_calibration",
|
||
|
|
[SUNRISE_ERROR_SELF_DIAGNOSTIC] = "error_self_diagnostic",
|
||
|
|
[SUNRISE_ERROR_OUT_OF_RANGE] = "error_out_of_range",
|
||
|
|
[SUNRISE_ERROR_MEMORY] = "error_memory",
|
||
|
|
[SUNRISE_ERROR_NO_MEASUREMENT] = "error_no_measurement",
|
||
|
|
[SUNRISE_ERROR_LOW_VOLTAGE] = "error_low_voltage",
|
||
|
|
[SUNRISE_ERROR_MEASUREMENT_TIMEOUT] = "error_measurement_timeout",
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct iio_enum sunrise_error_statuses_enum = {
|
||
|
|
.items = sunrise_error_statuses,
|
||
|
|
.num_items = ARRAY_SIZE(sunrise_error_statuses),
|
||
|
|
};
|
||
|
|
|
||
|
|
static ssize_t sunrise_error_status_read(struct iio_dev *iiodev,
|
||
|
|
uintptr_t private,
|
||
|
|
const struct iio_chan_spec *chan,
|
||
|
|
char *buf)
|
||
|
|
{
|
||
|
|
struct sunrise_dev *sunrise = iio_priv(iiodev);
|
||
|
|
unsigned long errors;
|
||
|
|
ssize_t len = 0;
|
||
|
|
u16 value;
|
||
|
|
int ret;
|
||
|
|
u8 i;
|
||
|
|
|
||
|
|
mutex_lock(&sunrise->lock);
|
||
|
|
ret = sunrise_read_word(sunrise, SUNRISE_ERROR_STATUS_REG, &value);
|
||
|
|
if (ret) {
|
||
|
|
mutex_unlock(&sunrise->lock);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
errors = value;
|
||
|
|
for_each_set_bit(i, &errors, ARRAY_SIZE(sunrise_error_statuses))
|
||
|
|
len += sysfs_emit_at(buf, len, "%s ", sunrise_error_statuses[i]);
|
||
|
|
|
||
|
|
if (len)
|
||
|
|
buf[len - 1] = '\n';
|
||
|
|
|
||
|
|
mutex_unlock(&sunrise->lock);
|
||
|
|
|
||
|
|
return len;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct iio_chan_spec_ext_info sunrise_concentration_ext_info[] = {
|
||
|
|
/* Calibration triggers. */
|
||
|
|
{
|
||
|
|
.name = "calibration_factory",
|
||
|
|
.write = sunrise_cal_factory_write,
|
||
|
|
.shared = IIO_SEPARATE,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "calibration_background",
|
||
|
|
.write = sunrise_cal_background_write,
|
||
|
|
.shared = IIO_SEPARATE,
|
||
|
|
},
|
||
|
|
|
||
|
|
/* Error statuses. */
|
||
|
|
{
|
||
|
|
.name = "error_status",
|
||
|
|
.read = sunrise_error_status_read,
|
||
|
|
.shared = IIO_SHARED_BY_ALL,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.name = "error_status_available",
|
||
|
|
.shared = IIO_SHARED_BY_ALL,
|
||
|
|
.read = iio_enum_available_read,
|
||
|
|
.private = (uintptr_t)&sunrise_error_statuses_enum,
|
||
|
|
},
|
||
|
|
{}
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct iio_chan_spec sunrise_channels[] = {
|
||
|
|
{
|
||
|
|
.type = IIO_CONCENTRATION,
|
||
|
|
.modified = 1,
|
||
|
|
.channel2 = IIO_MOD_CO2,
|
||
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
|
||
|
|
BIT(IIO_CHAN_INFO_SCALE),
|
||
|
|
.ext_info = sunrise_concentration_ext_info,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
.type = IIO_TEMP,
|
||
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
|
||
|
|
BIT(IIO_CHAN_INFO_SCALE),
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static int sunrise_read_raw(struct iio_dev *iio_dev,
|
||
|
|
const struct iio_chan_spec *chan,
|
||
|
|
int *val, int *val2, long mask)
|
||
|
|
{
|
||
|
|
struct sunrise_dev *sunrise = iio_priv(iio_dev);
|
||
|
|
u16 value;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
switch (mask) {
|
||
|
|
case IIO_CHAN_INFO_RAW:
|
||
|
|
switch (chan->type) {
|
||
|
|
case IIO_CONCENTRATION:
|
||
|
|
mutex_lock(&sunrise->lock);
|
||
|
|
ret = sunrise_read_word(sunrise, SUNRISE_CO2_FILTERED_COMP_REG,
|
||
|
|
&value);
|
||
|
|
mutex_unlock(&sunrise->lock);
|
||
|
|
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
*val = value;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
case IIO_TEMP:
|
||
|
|
mutex_lock(&sunrise->lock);
|
||
|
|
ret = sunrise_read_word(sunrise, SUNRISE_CHIP_TEMPERATURE_REG,
|
||
|
|
&value);
|
||
|
|
mutex_unlock(&sunrise->lock);
|
||
|
|
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
*val = value;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
case IIO_CHAN_INFO_SCALE:
|
||
|
|
switch (chan->type) {
|
||
|
|
case IIO_CONCENTRATION:
|
||
|
|
/*
|
||
|
|
* 1 / 10^4 to comply with IIO scale for CO2
|
||
|
|
* (percentage). The chip CO2 reading range is [400 -
|
||
|
|
* 5000] ppm which corresponds to [0,004 - 0,5] %.
|
||
|
|
*/
|
||
|
|
*val = 1;
|
||
|
|
*val2 = 10000;
|
||
|
|
return IIO_VAL_FRACTIONAL;
|
||
|
|
|
||
|
|
case IIO_TEMP:
|
||
|
|
/* x10 to comply with IIO scale (millidegrees celsius). */
|
||
|
|
*val = 10;
|
||
|
|
return IIO_VAL_INT;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
default:
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct iio_info sunrise_info = {
|
||
|
|
.read_raw = sunrise_read_raw,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct regmap_bus sunrise_regmap_bus = {
|
||
|
|
.read = sunrise_regmap_read,
|
||
|
|
.write = sunrise_regmap_write,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct regmap_config sunrise_regmap_config = {
|
||
|
|
.reg_bits = 8,
|
||
|
|
.val_bits = 8,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int sunrise_probe(struct i2c_client *client)
|
||
|
|
{
|
||
|
|
struct sunrise_dev *sunrise;
|
||
|
|
struct iio_dev *iio_dev;
|
||
|
|
|
||
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
|
||
|
|
I2C_FUNC_SMBUS_BLOCK_DATA)) {
|
||
|
|
dev_err(&client->dev,
|
||
|
|
"Adapter does not support required functionalities\n");
|
||
|
|
return -EOPNOTSUPP;
|
||
|
|
}
|
||
|
|
|
||
|
|
iio_dev = devm_iio_device_alloc(&client->dev, sizeof(*sunrise));
|
||
|
|
if (!iio_dev)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
sunrise = iio_priv(iio_dev);
|
||
|
|
sunrise->client = client;
|
||
|
|
mutex_init(&sunrise->lock);
|
||
|
|
|
||
|
|
i2c_set_clientdata(client, sunrise);
|
||
|
|
|
||
|
|
sunrise->regmap = devm_regmap_init(&client->dev, &sunrise_regmap_bus,
|
||
|
|
client, &sunrise_regmap_config);
|
||
|
|
if (IS_ERR(sunrise->regmap)) {
|
||
|
|
dev_err(&client->dev, "Failed to initialize regmap\n");
|
||
|
|
return PTR_ERR(sunrise->regmap);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The chip nacks the wake up message. If the adapter does not support
|
||
|
|
* protocol mangling do not set the I2C_M_IGNORE_NAK flag at the expense
|
||
|
|
* of possible cruft in the logs.
|
||
|
|
*/
|
||
|
|
if (i2c_check_functionality(client->adapter, I2C_FUNC_PROTOCOL_MANGLING))
|
||
|
|
sunrise->ignore_nak = true;
|
||
|
|
|
||
|
|
iio_dev->info = &sunrise_info;
|
||
|
|
iio_dev->name = DRIVER_NAME;
|
||
|
|
iio_dev->channels = sunrise_channels;
|
||
|
|
iio_dev->num_channels = ARRAY_SIZE(sunrise_channels);
|
||
|
|
iio_dev->modes = INDIO_DIRECT_MODE;
|
||
|
|
|
||
|
|
return devm_iio_device_register(&client->dev, iio_dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id sunrise_of_match[] = {
|
||
|
|
{ .compatible = "senseair,sunrise-006-0-0007" },
|
||
|
|
{}
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, sunrise_of_match);
|
||
|
|
|
||
|
|
static struct i2c_driver sunrise_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = DRIVER_NAME,
|
||
|
|
.of_match_table = sunrise_of_match,
|
||
|
|
},
|
||
|
|
.probe_new = sunrise_probe,
|
||
|
|
};
|
||
|
|
module_i2c_driver(sunrise_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Jacopo Mondi <jacopo@jmondi.org>");
|
||
|
|
MODULE_DESCRIPTION("Senseair Sunrise 006-0-0007 CO2 sensor IIO driver");
|
||
|
|
MODULE_LICENSE("GPL v2");
|