temperature_sensor: Add temperature sensor support for ESP32-C2

components/efuse/esp32c2/esp_efuse_rtc_calib.c

@@ -0,0 +1,23 @@
+/*
+ * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <esp_bit_defs.h>
+#include "esp_efuse.h"
+#include "esp_efuse_table.h"
+
+int esp_efuse_rtc_calib_get_ver(void)
+{
+    uint32_t result = 0;
+    esp_efuse_read_field_blob(ESP_EFUSE_BLOCK2_VERSION, &result, 3);
+    return result;
+}
+
+esp_err_t esp_efuse_rtc_calib_get_tsens_val(float* tsens_cal)
+{
+    // Currently calibration is not supported on ESP32-C2, IDF-5236
+    *tsens_cal = 0.0;
+    return ESP_OK;
+}

components/efuse/esp32c2/include/esp_efuse_rtc_calib.h

@@ -0,0 +1,26 @@
+/*
+ * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <esp_types.h>
+#include <esp_err.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Get the temperature sensor calibration number delta_T stored in the efuse.
+ *
+ * @param tsens_cal Pointer of the specification of temperature sensor calibration number in efuse.
+ *
+ * @return ESP_OK if get the calibration value successfully.
+ *         ESP_ERR_INVALID_ARG if can't get the calibration value.
+ */
+esp_err_t esp_efuse_rtc_calib_get_tsens_val(float* tsens_cal);
+
+#ifdef __cplusplus
+}
+#endif

components/efuse/esp32c2/sources.cmake

@@ -1,3 +1,4 @@
 set(EFUSE_SOC_SRCS  "esp_efuse_table.c"
                     "esp_efuse_fields.c"
+                    "esp_efuse_rtc_calib.c"
                     "esp_efuse_utility.c")