| /* |
| * Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define DT_DRV_COMPAT espressif_esp32_temp |
| |
| #include <driver/temp_sensor.h> |
| |
| #include <zephyr/kernel.h> |
| #include <zephyr/device.h> |
| #include <zephyr/devicetree.h> |
| #include <zephyr/drivers/sensor.h> |
| |
| #include <zephyr/logging/log.h> |
| LOG_MODULE_REGISTER(esp32_temp, CONFIG_SENSOR_LOG_LEVEL); |
| |
| #if CONFIG_SOC_SERIES_ESP32 |
| #error "Temperature sensor not supported on ESP32" |
| #endif /* CONFIG_IDF_TARGET_ESP32 */ |
| |
| struct esp32_temp_data { |
| struct k_mutex mutex; |
| temp_sensor_config_t temp_sensor; |
| float temp_out; |
| }; |
| |
| struct esp32_temp_config { |
| temp_sensor_dac_offset_t range; |
| }; |
| |
| static int esp32_temp_sample_fetch(const struct device *dev, enum sensor_channel chan) |
| { |
| struct esp32_temp_data *data = dev->data; |
| int rc = 0; |
| |
| k_mutex_lock(&data->mutex, K_FOREVER); |
| |
| if (temp_sensor_read_celsius(&data->temp_out) != ESP_OK) { |
| LOG_ERR("Temperature read error!"); |
| rc = -EFAULT; |
| goto unlock; |
| } |
| |
| unlock: |
| k_mutex_unlock(&data->mutex); |
| |
| return rc; |
| } |
| |
| static int esp32_temp_channel_get(const struct device *dev, enum sensor_channel chan, |
| struct sensor_value *val) |
| { |
| struct esp32_temp_data *data = dev->data; |
| const struct esp32_temp_config *cfg = dev->config; |
| |
| if (chan != SENSOR_CHAN_DIE_TEMP) { |
| return -ENOTSUP; |
| } |
| |
| return sensor_value_from_double(val, data->temp_out); |
| } |
| |
| static const struct sensor_driver_api esp32_temp_driver_api = { |
| .sample_fetch = esp32_temp_sample_fetch, |
| .channel_get = esp32_temp_channel_get, |
| }; |
| |
| static int esp32_temp_init(const struct device *dev) |
| { |
| struct esp32_temp_data *data = dev->data; |
| const struct esp32_temp_config *conf = dev->config; |
| |
| k_mutex_init(&data->mutex); |
| temp_sensor_get_config(&data->temp_sensor); |
| data->temp_sensor.dac_offset = conf->range; |
| temp_sensor_set_config(data->temp_sensor); |
| temp_sensor_start(); |
| LOG_DBG("Temperature sensor started. Offset %d, clk_div %d", |
| data->temp_sensor.dac_offset, data->temp_sensor.clk_div); |
| |
| return 0; |
| } |
| |
| #define ESP32_TEMP_DEFINE(inst) \ |
| static struct esp32_temp_data esp32_temp_dev_data_##inst = { \ |
| .temp_sensor = TSENS_CONFIG_DEFAULT(), \ |
| }; \ |
| \ |
| static const struct esp32_temp_config esp32_temp_dev_config_##inst = { \ |
| .range = (temp_sensor_dac_offset_t) DT_INST_PROP(inst, range), \ |
| }; \ |
| \ |
| SENSOR_DEVICE_DT_INST_DEFINE(inst, esp32_temp_init, NULL, \ |
| &esp32_temp_dev_data_##inst, &esp32_temp_dev_config_##inst, \ |
| POST_KERNEL, CONFIG_SENSOR_INIT_PRIORITY, \ |
| &esp32_temp_driver_api); \ |
| |
| DT_INST_FOREACH_STATUS_OKAY(ESP32_TEMP_DEFINE) |