/****************************************************************************
* drivers/sensors/hyt271.c
* Character driver for HYT271 Digital Humidity and Temperature Module.
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <stdio.h>
#include <stdlib.h>
#include <nuttx/kmalloc.h>
#include <nuttx/kthread.h>
#include <nuttx/signal.h>
#include <nuttx/semaphore.h>
#include <nuttx/fs/fs.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/sensors/hyt271.h>
#include <nuttx/sensors/sensor.h>
#if defined(CONFIG_I2C) && defined(CONFIG_SENSORS_HYT271)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define HYT271_TEMPDATA_MASK 0x3fff
#define HYT271_HUMIDATA_MASK 0x3fff
#define HYT271_TEMPDATA_SHIFT(x) ((x) >> 2)
#define HYT271_HUMIDATA_SHIFT(x) ((x) >> 16)
#define HYT271_TEMPRAWDATA(x) (HYT271_TEMPDATA_SHIFT(x) & HYT271_TEMPDATA_MASK)
#define HYT271_TEMPRAWEQUAL(x, y) \
(HYT271_TEMPRAWDATA(x) == HYT271_TEMPRAWDATA(y))
#define HYT271_HUMIRAWDATA(x) (HYT271_HUMIDATA_SHIFT(x) & HYT271_HUMIDATA_MASK)
#define HYT271_HUMIRAWEQUAL(x, y) \
(HYT271_HUMIRAWDATA(x) == HYT271_HUMIRAWDATA(y))
#define HYT271_TEMPDATA(x) (HYT271_TEMPRAWDATA(x) * 165.0 / 16383.0 - 40.0)
#define HYT271_HUMIDATA(x) (HYT271_HUMIRAWDATA(x) * 100.0 / 16383.0)
#define HYT271_SENSOR_HUMI 0
#define HYT271_SENSOR_TEMP 1
#define HYT271_SENSOR_MAX 2
/****************************************************************************
* Private Types
****************************************************************************/
struct hyt271_sensor_data_s
{
uint32_t data;
uint64_t timestamp;
};
struct hyt271_dev_s;
struct hyt271_sensor_s
{
struct sensor_lowerhalf_s lower; /* Common lower interface */
unsigned int buffer_size; /* Data size for reading */
#ifdef CONFIG_SENSORS_HYT271_POLL
bool enabled; /* Sensor activated */
#endif
FAR struct hyt271_dev_s *dev; /* Driver instance */
};
struct hyt271_dev_s
{
struct hyt271_sensor_s sensor[HYT271_SENSOR_MAX]; /* Sensor types */
FAR struct i2c_master_s *i2c; /* I2C interface */
FAR struct hyt271_bus_s *bus; /* Bus power interface */
sem_t lock_measure_cycle; /* Locks measure cycle */
uint32_t freq; /* I2C Frequency */
#ifdef CONFIG_SENSORS_HYT271_POLL
unsigned int interval; /* Polling interval */
sem_t run; /* Locks sensor thread */
bool initial_read; /* Already read */
#endif
uint8_t addr; /* I2C address */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Sensor functions */
static int hyt271_active(FAR struct sensor_lowerhalf_s *lower,
unsigned char enabled);
static int hyt271_fetch(FAR struct sensor_lowerhalf_s *lower,
FAR char *buffer, size_t buflen);
static int hyt271_control(FAR struct sensor_lowerhalf_s *lower,
int cmd, unsigned long arg);
#ifdef CONFIG_SENSORS_HYT271_POLL
static int hyt271_set_interval(FAR struct sensor_lowerhalf_s *lower,
FAR unsigned int *period_us);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
static const struct sensor_ops_s g_hyt271_ops =
{
#ifdef CONFIG_SENSORS_HYT271_POLL
.set_interval = hyt271_set_interval,
#endif
.activate = hyt271_active,
.fetch = hyt271_fetch,
.control = hyt271_control
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: hyt271_humi_from_rawdata
*
* Description: Helper for converting raw data to temperature.
*
* Parameter:
* data - Pointer to internal datat structure for measured data
* temp - Pointer to sensor data structure for humidity
****************************************************************************/
static void hyt271_humi_from_rawdata(FAR struct hyt271_sensor_data_s *data,
FAR struct sensor_event_humi *humi)
{
humi->timestamp = data->timestamp;
humi->humidity = HYT271_HUMIDATA(data->data);
}
/****************************************************************************
* Name: hyt271_temp_from_rawdata
*
* Description: Helper for converting raw data to temperature.
*
* Parameter:
* data - Pointer to internal datat structure for measured data
* temp - Pointer to sensor data structure for temperature
****************************************************************************/
static void hyt271_temp_from_rawdata(FAR struct hyt271_sensor_data_s *data,
FAR struct sensor_event_temp *temp)
{
temp->timestamp = data->timestamp;
temp->temperature = HYT271_TEMPDATA(data->data);
}
/****************************************************************************
* Name: hyt271_curtime
*
* Description: Helper to get current timestamp.
*
* Return:
* Timestamp in nsec
****************************************************************************/
static unsigned long hyt271_curtime(void)
{
struct timespec ts;
#ifdef CONFIG_CLOCK_MONOTONIC
clock_gettime(CLOCK_MONOTONIC, &ts);
#else
clock_gettime(CLOCK_REALTIME, &ts);
#endif
return 1000000ull * ts.tv_sec + ts.tv_nsec / 1000;
}
/****************************************************************************
* Name: hyt271_init_rw_buffer
*
* Description: Helper for buffer initializing.
*
* Parameter:
* buffer - Pointer to the buffers memory region
* cmd - The command to set in the buffer
* size - The buffer size
****************************************************************************/
static void hyt271_init_rw_buffer(FAR uint8_t *buffer, uint8_t cmd,
uint8_t size)
{
int n;
buffer[0] = cmd;
for (n = 1; n < size; n++)
{
buffer[n] = 0x00;
}
}
/****************************************************************************
* Name: hyt271_df
*
* Description: Helper for reading data by a data fetch.
*
* Parameter:
* dev - Pointer to private driver instance
* config - I2C configuration
* buffer - Pointer to the buffers memory region
* size - The buffer size
*
* Return:
* OK - on success
****************************************************************************/
static int hyt271_df(FAR struct hyt271_dev_s *dev,
FAR struct i2c_config_s *config, FAR uint8_t *buffer,
uint8_t size)
{
int ret;
/* Read data from the device */
ret = i2c_read(dev->i2c, config, buffer, size);
if (ret < 0)
{
snerr ("i2c_read failed: %d\n", ret);
return ret;
}
return OK;
}
/****************************************************************************
* Name: hyt271_mr
*
* Description: Helper for sending a measurement cycle request.
*
* Parameter:
* dev - Pointer to private driver instance
* config - I2C configuration
*
* Return:
* OK - on success
****************************************************************************/
static int hyt271_mr(FAR struct hyt271_dev_s *dev,
FAR struct i2c_config_s *config)
{
uint8_t buffer;
int ret;
/* We only must send the i2c address with write bit enabled here. This
* isn't provided by the i2c api, so instead sending a null byte seems
* to work fine.
*/
buffer = 0x00;
/* Send address only with write bit enabled */
ret = i2c_write(dev->i2c, config, &buffer, 1);
if (ret < 0)
{
snerr ("i2c_write failed: %d\n", ret);
}
/* Wait until measure cycle is done. This takes between 60 - 100 ms. */
nxsig_usleep(100000);
return ret;
}
/****************************************************************************
* Name: hyt271_cmd
*
* Description: Helper for sending a command.
*
* Parameter:
* dev - Pointer to private driver instance
* config - I2C configuration
* buffer - Pointer to the buffers memory region
* size - The buffer size
*
* Return:
* OK - on success
****************************************************************************/
static int hyt271_cmd(FAR struct hyt271_dev_s *dev,
FAR struct i2c_config_s *config, FAR uint8_t *buffer,
uint8_t size)
{
int ret;
/* Write command data to the device */
ret = i2c_write(dev->i2c, config, buffer, size);
if (ret < 0)
{
snerr ("i2c_write failed: %d\n", ret);
return ret;
}
return OK;
}
/****************************************************************************
* Name: hyt271_cmd_response
*
* Description: Helper for sending a command fetching the response after a
* necessary timeout.
* Parameter:
* dev - Pointer to private driver instance
* config - I2C configuration
* buffer - Pointer to the buffers memory region
* wsize - Bytes to write from the buffer
* rsize - Bytes to read into the buffer
* usec - Timeout between write and read operation in usec
*
* Return:
* OK - on success
****************************************************************************/
static int hyt271_cmd_response(FAR struct hyt271_dev_s *dev,
FAR struct i2c_config_s *config,
FAR uint8_t *buffer, uint8_t wsize,
uint8_t rsize, unsigned int usec)
{
int ret;
/* Send command */
ret = hyt271_cmd(dev, config, buffer, wsize);
if (ret < 0)
{
return ret;
}
/* Sleep for usec µs until response is ready */
nxsig_usleep(usec);
/* Read response and return */
hyt271_init_rw_buffer(buffer, 0x00, rsize);
ret = hyt271_df(dev, config, buffer, rsize);
if (ret < 0)
{
return ret;
}
/* Check if ack response is valid */
if (buffer[0] != 0x81)
{
snerr ("wrong ack response: 0x%x\n", buffer[0]);
ret = -EIO;
}
return ret;
}
/****************************************************************************
* Name: hyt271_change_addr
*
* Description: Change I2C address of the chip.
*
* Parameter:
* dev - Pointer to private driver instance
* addr - The new I2C address
*
* Return:
* OK - on success
****************************************************************************/
static int hyt271_change_addr(FAR struct hyt271_dev_s *dev, uint8_t addr)
{
int ret;
irqstate_t irq_flags;
struct i2c_config_s config;
uint8_t buffer[3];
if (dev->bus == NULL)
{
return -ENOSYS;
}
if (addr & 0x80)
{
return -EINVAL;
}
/* Reset and subsequent operations must be mutually exclusive. Prevents
* from being used by another open driver instance during this address
* change operation.
*/
ret = nxsem_wait(&dev->lock_measure_cycle);
if (ret < 0)
{
return ret;
}
/* Set up the I2C configuration */
config.frequency = dev->freq;
config.address = dev->addr;
config.addrlen = 7;
/* Enter in command mode */
hyt271_init_rw_buffer(buffer, HYT271_CMD_START_CM, 3);
/* The following section must be done within a time-constrained window.
* It should be enough to lock this cpu than in the case of SMP all the
* others.
*/
irq_flags = up_irq_save();
/* Power on reset the bus.
* Entering in command mode must be done within the next 10 ms after power
* up.
*/
ret = dev->bus->pwonreset(dev->bus);
if (ret < 0)
{
ret = -EIO;
goto err_unlock;
}
ret = hyt271_cmd_response(dev, &config, buffer, 3, 1, 100);
/* The chip should be in command mode now */
up_irq_restore(irq_flags);
if (ret < 0)
{
goto err_unlock;
}
/* Fetch current I2C address */
hyt271_init_rw_buffer(buffer, HYT271_CMD_EEPROM_READ, 3);
ret = hyt271_cmd_response(dev, &config, buffer, 3, 3, 100);
if (ret < 0)
{
goto err_unlock;
}
if ((buffer[2] & 0x7f) != dev->addr)
{
snerr("wrong current I2C address response: 0x%x\n", buffer[2] & 0x7f);
ret = -EIO;
goto err_unlock;
}
/* Write new I2C address */
hyt271_init_rw_buffer(buffer, HYT271_CMD_EEPROM_WRITE, 3);
buffer[2] = addr;
ret = hyt271_cmd_response(dev, &config, buffer, 3, 3, 12000);
if (ret < 0)
{
goto err_unlock;
}
/* Fetch new I2C address again for confirmation */
hyt271_init_rw_buffer(buffer, HYT271_CMD_EEPROM_READ, 3);
ret = hyt271_cmd_response(dev, &config, buffer, 3, 3, 100);
if (ret < 0)
{
goto err_unlock;
}
if ((buffer[2] & 0x7f) != addr)
{
snerr("wrong changed I2C address response: 0x%x\n", buffer[2] & 0x7f);
ret = -EIO;
goto err_unlock;
}
/* Finally go back to normal mode */
hyt271_init_rw_buffer(buffer, HYT271_CMD_START_NOM, 3);
ret = hyt271_cmd(dev, &config, buffer, 3);
if (ret < 0)
{
goto err_unlock;
}
/* Set new address */
dev->addr = addr;
nxsem_post(&dev->lock_measure_cycle);
return OK;
err_unlock:
nxsem_post(&dev->lock_measure_cycle);
return ret;
}
/****************************************************************************
* Name: hyt271_measure_read
*
* Description:
* Performs a measurement cycle and reads measured data.
*
* Parameter:
* dev - Pointer to private driver instance
* data - Pointer to internal data structure for measured data
* Return:
* OK - on success
****************************************************************************/
static int hyt271_measure_read(FAR struct hyt271_dev_s *dev,
FAR struct hyt271_sensor_data_s *data)
{
int ret;
struct i2c_config_s config;
uint8_t buffer[4];
/* Measure request and read operation must be mutually exclusive.
* Prevents from being used by another open driver instance during this
* read operation.
*/
ret = nxsem_wait(&dev->lock_measure_cycle);
if (ret < 0)
{
return ret;
}
/* Set up the I2C configuration */
config.frequency = dev->freq;
config.address = dev->addr;
config.addrlen = 7;
/* Start a measurement request */
ret = hyt271_mr(dev, &config);
if (ret < 0)
{
snerr("ERROR: Error starting measure cycle\n");
goto err_unlock;
}
/* Read humity and temperature from the sensor */
ret = hyt271_df(dev, &config, buffer, 4);
if (ret < 0)
{
snerr("ERROR: Error reading sensor data!\n");
goto err_unlock;
}
sninfo("value: %02x %02x %02x %02x ret: %d\n",
buffer[0], buffer[1], buffer[2], buffer[3], ret);
data->data = buffer[0] << 24 | buffer[1] << 16 | \
buffer[2] << 8 | buffer[3];
data->timestamp = hyt271_curtime();
nxsem_post(&dev->lock_measure_cycle);
return OK;
err_unlock:
nxsem_post(&dev->lock_measure_cycle);
return ret;
}
/****************************************************************************
* Name: hyt271_fetch
*
* Description: Performs a measurement cycle and data read with data
* conversion.
*
* Parameter:
* lower - Pointer to lower half sensor driver instance
* buffer - Pointer to the buffer for reading data
* buflen - Size of the buffer
*
* Return:
* OK - on success
****************************************************************************/
static int hyt271_fetch(FAR struct sensor_lowerhalf_s *lower,
FAR char *buffer, size_t buflen)
{
int ret;
struct hyt271_sensor_data_s data;
FAR struct hyt271_sensor_s *priv = (FAR struct hyt271_sensor_s *)lower;
/* Check if the user is reading the right size */
if (buflen != priv->buffer_size)
{
snerr("ERROR: You need to read %d bytes from this sensor!\n",
priv->buffer_size);
return -EINVAL;
}
ret = hyt271_measure_read(priv->dev, &data);
if (ret < 0)
{
return ret;
}
switch (lower->type)
{
case SENSOR_TYPE_AMBIENT_TEMPERATURE:
{
struct sensor_event_temp temp;
hyt271_temp_from_rawdata(&data, &temp);
memcpy(buffer, &temp, sizeof(temp));
}
break;
case SENSOR_TYPE_RELATIVE_HUMIDITY:
{
struct sensor_event_humi humi;
hyt271_humi_from_rawdata(&data, &humi);
memcpy(buffer, &humi, sizeof(humi));
}
break;
default:
return -EINVAL;
}
return buflen;
}
/****************************************************************************
* Name: hyt271_control
*
* Description: Interface function of struct sensor_ops_s.
*
* Return:
* OK - on success
****************************************************************************/
static int hyt271_control(FAR struct sensor_lowerhalf_s *lower,
int cmd, unsigned long arg)
{
int ret;
struct hyt271_sensor_s *priv = (FAR struct hyt271_sensor_s *)lower;
switch (cmd)
{
/* Read i2c address */
case SNIOC_READADDR:
{
FAR uint8_t *ptr = (FAR uint8_t *)((uintptr_t)arg);
DEBUGASSERT(ptr != NULL);
*ptr = priv->dev->addr;
sninfo("readaddr: %02x\n", *ptr);
ret = OK;
}
break;
/* Change i2c address */
case SNIOC_CHANGEADDR:
{
uint8_t addr = arg;
ret = hyt271_change_addr(priv->dev, addr);
sninfo("changeaddr: %02x\n", addr);
}
break;
default:
snerr("ERROR: Unrecognized cmd: %d\n", cmd);
ret = -ENOTTY;
break;
}
return ret;
}
/****************************************************************************
* Name: hyt271_active
*
* Description: Interface function of struct sensor_ops_s.
*
* Return:
* OK - on success
****************************************************************************/
static int hyt271_active(FAR struct sensor_lowerhalf_s *lower,
unsigned char enabled)
{
#ifdef CONFIG_SENSORS_HYT271_POLL
bool start_thread = false;
struct hyt271_sensor_s *priv = (FAR struct hyt271_sensor_s *)lower;
if (enabled)
{
if (!priv->dev->sensor[HYT271_SENSOR_TEMP].enabled &&
!priv->dev->sensor[HYT271_SENSOR_HUMI].enabled)
{
start_thread = true;
}
}
priv->enabled = enabled;
if (start_thread == true)
{
/* Wake up the thread */
nxsem_post(&priv->dev->run);
}
#endif
return OK;
}
/****************************************************************************
* Name: hyt271_set_interval
*
* Description: Interface function of struct sensor_ops_s.
*
* Return:
* OK - on success
****************************************************************************/
#ifdef CONFIG_SENSORS_HYT271_POLL
static int hyt271_set_interval(FAR struct sensor_lowerhalf_s *lower,
FAR unsigned int *period_us)
{
FAR struct hyt271_sensor_s *priv = (FAR struct hyt271_sensor_s *)lower;
priv->dev->interval = *period_us;
return OK;
}
#endif
/****************************************************************************
* Name: hyt271_thread
*
* Description: Thread for performing interval measurement cycle and data
* read.
*
* Parameter:
* argc - Number opf arguments
* argv - Pointer to argument list
****************************************************************************/
#ifdef CONFIG_SENSORS_HYT271_POLL
static int hyt271_thread(int argc, char** argv)
{
FAR struct hyt271_dev_s *priv = (FAR struct hyt271_dev_s *)
((uintptr_t)strtoul(argv[1], NULL, 0));
while (true)
{
int ret;
uint32_t orawdata;
struct hyt271_sensor_data_s data;
struct hyt271_sensor_s *hsensor = &priv->sensor[HYT271_SENSOR_HUMI];
struct hyt271_sensor_s *tsensor = &priv->sensor[HYT271_SENSOR_TEMP];
if (!hsensor->enabled && !tsensor->enabled)
{
/* Reset initial read identifier */
priv->initial_read = false;
/* Waiting to be woken up */
ret = nxsem_wait(&priv->run);
if (ret < 0)
{
continue;
}
}
/* Store the last sensor data for later comparison */
orawdata = data.data;
ret = hyt271_measure_read(priv, &data);
if (!ret)
{
/* Notify upper */
if (priv->initial_read == false || (hsensor->enabled == true &&
!HYT271_HUMIRAWEQUAL(orawdata, data.data)))
{
struct sensor_event_humi humi;
hyt271_humi_from_rawdata(&data, &humi);
hsensor->lower.push_event(hsensor->lower.priv, &humi,
sizeof(struct sensor_event_humi));
}
if (priv->initial_read == false || (tsensor->enabled == true &&
!HYT271_TEMPRAWEQUAL(orawdata, data.data)))
{
struct sensor_event_temp temp;
hyt271_temp_from_rawdata(&data, &temp);
tsensor->lower.push_event(tsensor->lower.priv, &temp,
sizeof(struct sensor_event_temp));
}
if (priv->initial_read == false)
{
priv->initial_read = true;
}
}
/* Sleeping thread before fetching the next sensor data */
nxsig_usleep(priv->interval);
}
return OK;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: hyt271_register
*
* Description:
* Register the HYT271 character device.
*
* Input Parameters:
* devno - The user specifies device number, from 0.
* i2c - An instance of the I2C interface to communicate with HYT271
* sensor.
*
* addr - The I2C address of the HYT271.
* bus - Callback to board specific logic for i2c bus power.
* Will be used for changing i2c address of the sensor and can be
* set to NULL when not supported.
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
****************************************************************************/
int hyt271_register(int devno, FAR struct i2c_master_s *i2c, uint8_t addr,
FAR struct hyt271_bus_s *bus)
{
int ret;
struct hyt271_sensor_s *tmp;
#ifdef CONFIG_SENSORS_HYT271_POLL
FAR char *argv[2];
char arg1[32];
#endif
/* Sanity check */
if (!i2c)
{
snerr("Invalid i2c instance\n");
return -EINVAL;
}
/* Initialize the HYT271 device structure */
FAR struct hyt271_dev_s *priv = (FAR struct hyt271_dev_s *)
kmm_malloc(sizeof(struct hyt271_dev_s));
if (priv == NULL)
{
snerr("ERROR: Failed to allocate instance\n");
return -ENOMEM;
}
priv->i2c = i2c;
priv->freq = 100000;
priv->addr = addr;
priv->bus = bus;
#ifdef CONFIG_SENSORS_HYT271_POLL
priv->interval = CONFIG_SENSORS_HYT271_POLL_INTERVAL;
priv->initial_read = false;
#endif
nxsem_init(&priv->lock_measure_cycle, 0, 1);
#ifdef CONFIG_SENSORS_HYT271_POLL
nxsem_init(&priv->run, 0, 0);
nxsem_set_protocol(&priv->run, SEM_PRIO_NONE);
#endif
/* Humidity register */
tmp = &priv->sensor[HYT271_SENSOR_HUMI];
tmp->dev = priv;
#ifdef CONFIG_SENSORS_HYT271_POLL
tmp->enabled = false;
#endif
tmp->buffer_size = sizeof(struct sensor_event_humi);
tmp->lower.ops = &g_hyt271_ops;
tmp->lower.type = SENSOR_TYPE_RELATIVE_HUMIDITY;
tmp->lower.uncalibrated = false;
tmp->lower.buffer_number = 1;
ret = sensor_register(&tmp->lower, devno);
if (ret < 0)
{
goto humi_err;
}
/* Temperature register */
tmp = &priv->sensor[HYT271_SENSOR_TEMP];
tmp->dev = priv;
#ifdef CONFIG_SENSORS_HYT271_POLL
tmp->enabled = false;
#endif
tmp->buffer_size = sizeof(struct sensor_event_temp);
tmp->lower.ops = &g_hyt271_ops;
tmp->lower.type = SENSOR_TYPE_AMBIENT_TEMPERATURE;
tmp->lower.uncalibrated = false;
tmp->lower.buffer_number = 1;
ret = sensor_register(&tmp->lower, devno);
if (ret < 0)
{
goto temp_err;
}
#ifdef CONFIG_SENSORS_HYT271_POLL
/* Create thread for sensor */
snprintf(arg1, 16, "0x%" PRIxPTR, (uintptr_t)priv);
argv[0] = arg1;
argv[1] = NULL;
ret = kthread_create("hyt271_thread", SCHED_PRIORITY_DEFAULT,
CONFIG_SENSORS_HYT271_THREAD_STACKSIZE,
hyt271_thread, argv);
if (ret > 0)
#endif
{
return OK;
}
humi_err:
sensor_unregister(&priv->sensor[HYT271_SENSOR_HUMI].lower, devno);
temp_err:
sensor_unregister(&priv->sensor[HYT271_SENSOR_TEMP].lower, devno);
nxsem_destroy(&priv->lock_measure_cycle);
kmm_free(priv);
return ret;
}
#endif /* CONFIG_I2C && CONFIG_SENSORS_HYT271 */