135 lines
2.9 KiB
C
135 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2016 Intel Corporation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#define DT_DRV_COMPAT ti_tmp007
|
|
|
|
#include <device.h>
|
|
#include <drivers/i2c.h>
|
|
#include <drivers/gpio.h>
|
|
#include <sys/byteorder.h>
|
|
#include <sys/util.h>
|
|
#include <kernel.h>
|
|
#include <drivers/sensor.h>
|
|
#include <sys/__assert.h>
|
|
#include <logging/log.h>
|
|
|
|
#include "tmp007.h"
|
|
|
|
LOG_MODULE_REGISTER(TMP007, CONFIG_SENSOR_LOG_LEVEL);
|
|
|
|
int tmp007_reg_read(struct tmp007_data *drv_data,
|
|
uint8_t reg, uint16_t *val)
|
|
{
|
|
if (i2c_burst_read(drv_data->i2c, TMP007_I2C_ADDRESS,
|
|
reg, (uint8_t *) val, 2) < 0) {
|
|
LOG_ERR("I2C read failed");
|
|
return -EIO;
|
|
}
|
|
|
|
*val = sys_be16_to_cpu(*val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int tmp007_reg_write(struct tmp007_data *drv_data, uint8_t reg, uint16_t val)
|
|
{
|
|
uint8_t tx_buf[3] = {reg, val >> 8, val & 0xFF};
|
|
|
|
return i2c_write(drv_data->i2c, tx_buf, sizeof(tx_buf),
|
|
TMP007_I2C_ADDRESS);
|
|
}
|
|
|
|
int tmp007_reg_update(struct tmp007_data *drv_data, uint8_t reg,
|
|
uint16_t mask, uint16_t val)
|
|
{
|
|
uint16_t old_val = 0U;
|
|
uint16_t new_val;
|
|
|
|
if (tmp007_reg_read(drv_data, reg, &old_val) < 0) {
|
|
return -EIO;
|
|
}
|
|
|
|
new_val = old_val & ~mask;
|
|
new_val |= val & mask;
|
|
|
|
return tmp007_reg_write(drv_data, reg, new_val);
|
|
}
|
|
|
|
static int tmp007_sample_fetch(struct device *dev, enum sensor_channel chan)
|
|
{
|
|
struct tmp007_data *drv_data = dev->driver_data;
|
|
uint16_t val;
|
|
|
|
__ASSERT_NO_MSG(chan == SENSOR_CHAN_ALL || chan == SENSOR_CHAN_AMBIENT_TEMP);
|
|
|
|
if (tmp007_reg_read(drv_data, TMP007_REG_TOBJ, &val) < 0) {
|
|
return -EIO;
|
|
}
|
|
|
|
if (val & TMP007_DATA_INVALID_BIT) {
|
|
return -EIO;
|
|
}
|
|
|
|
drv_data->sample = arithmetic_shift_right((int16_t)val, 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tmp007_channel_get(struct device *dev,
|
|
enum sensor_channel chan,
|
|
struct sensor_value *val)
|
|
{
|
|
struct tmp007_data *drv_data = dev->driver_data;
|
|
int32_t uval;
|
|
|
|
if (chan != SENSOR_CHAN_AMBIENT_TEMP) {
|
|
return -ENOTSUP;
|
|
}
|
|
|
|
uval = (int32_t)drv_data->sample * TMP007_TEMP_SCALE;
|
|
val->val1 = uval / 1000000;
|
|
val->val2 = uval % 1000000;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct sensor_driver_api tmp007_driver_api = {
|
|
#ifdef CONFIG_TMP007_TRIGGER
|
|
.attr_set = tmp007_attr_set,
|
|
.trigger_set = tmp007_trigger_set,
|
|
#endif
|
|
.sample_fetch = tmp007_sample_fetch,
|
|
.channel_get = tmp007_channel_get,
|
|
};
|
|
|
|
int tmp007_init(struct device *dev)
|
|
{
|
|
struct tmp007_data *drv_data = dev->driver_data;
|
|
|
|
drv_data->i2c = device_get_binding(DT_INST_BUS_LABEL(0));
|
|
if (drv_data->i2c == NULL) {
|
|
LOG_DBG("Failed to get pointer to %s device!",
|
|
DT_INST_BUS_LABEL(0));
|
|
return -EINVAL;
|
|
}
|
|
|
|
#ifdef CONFIG_TMP007_TRIGGER
|
|
if (tmp007_init_interrupt(dev) < 0) {
|
|
LOG_DBG("Failed to initialize interrupt!");
|
|
return -EIO;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct tmp007_data tmp007_driver;
|
|
|
|
DEVICE_AND_API_INIT(tmp007, DT_INST_LABEL(0), tmp007_init,
|
|
&tmp007_driver,
|
|
NULL, POST_KERNEL, CONFIG_SENSOR_INIT_PRIORITY,
|
|
&tmp007_driver_api);
|