142 lines
3.2 KiB
C
142 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2016 Intel Corporation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#define DT_DRV_COMPAT ti_tmp007
|
|
|
|
#include <zephyr/device.h>
|
|
#include <zephyr/drivers/i2c.h>
|
|
#include <zephyr/drivers/gpio.h>
|
|
#include <zephyr/sys/byteorder.h>
|
|
#include <zephyr/sys/util.h>
|
|
#include <zephyr/kernel.h>
|
|
#include <zephyr/drivers/sensor.h>
|
|
#include <zephyr/sys/__assert.h>
|
|
#include <zephyr/logging/log.h>
|
|
|
|
#include "tmp007.h"
|
|
|
|
LOG_MODULE_REGISTER(TMP007, CONFIG_SENSOR_LOG_LEVEL);
|
|
|
|
int tmp007_reg_read(const struct i2c_dt_spec *i2c, uint8_t reg, uint16_t *val)
|
|
{
|
|
if (i2c_burst_read_dt(i2c, 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(const struct i2c_dt_spec *i2c, uint8_t reg, uint16_t val)
|
|
{
|
|
uint8_t tx_buf[3] = {reg, val >> 8, val & 0xFF};
|
|
|
|
return i2c_write_dt(i2c, tx_buf, sizeof(tx_buf));
|
|
}
|
|
|
|
int tmp007_reg_update(const struct i2c_dt_spec *i2c, uint8_t reg,
|
|
uint16_t mask, uint16_t val)
|
|
{
|
|
uint16_t old_val = 0U;
|
|
uint16_t new_val;
|
|
|
|
if (tmp007_reg_read(i2c, reg, &old_val) < 0) {
|
|
return -EIO;
|
|
}
|
|
|
|
new_val = old_val & ~mask;
|
|
new_val |= val & mask;
|
|
|
|
return tmp007_reg_write(i2c, reg, new_val);
|
|
}
|
|
|
|
static int tmp007_sample_fetch(const struct device *dev,
|
|
enum sensor_channel chan)
|
|
{
|
|
struct tmp007_data *drv_data = dev->data;
|
|
const struct tmp007_config *cfg = dev->config;
|
|
uint16_t val;
|
|
|
|
__ASSERT_NO_MSG(chan == SENSOR_CHAN_ALL || chan == SENSOR_CHAN_AMBIENT_TEMP);
|
|
|
|
if (tmp007_reg_read(&cfg->i2c, 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(const struct device *dev,
|
|
enum sensor_channel chan,
|
|
struct sensor_value *val)
|
|
{
|
|
struct tmp007_data *drv_data = dev->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(const struct device *dev)
|
|
{
|
|
const struct tmp007_config *cfg = dev->config;
|
|
|
|
if (!device_is_ready(cfg->i2c.bus)) {
|
|
LOG_ERR("Bus device is not ready");
|
|
return -ENODEV;
|
|
}
|
|
|
|
#ifdef CONFIG_TMP007_TRIGGER
|
|
if (cfg->int_gpio.port) {
|
|
if (tmp007_init_interrupt(dev) < 0) {
|
|
LOG_DBG("Failed to initialize interrupt!");
|
|
return -EIO;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define TMP007_DEFINE(inst) \
|
|
static struct tmp007_data tmp007_data_##inst; \
|
|
\
|
|
static const struct tmp007_config tmp007_config_##inst = { \
|
|
.i2c = I2C_DT_SPEC_INST_GET(inst), \
|
|
IF_ENABLED(CONFIG_TMP007_TRIGGER, \
|
|
(.int_gpio = GPIO_DT_SPEC_INST_GET_OR(inst, int_gpios, { 0 }),)) \
|
|
}; \
|
|
\
|
|
SENSOR_DEVICE_DT_INST_DEFINE(inst, tmp007_init, NULL, \
|
|
&tmp007_data_##inst, &tmp007_config_##inst, POST_KERNEL, \
|
|
CONFIG_SENSOR_INIT_PRIORITY, &tmp007_driver_api); \
|
|
|
|
DT_INST_FOREACH_STATUS_OKAY(TMP007_DEFINE)
|