esp32h2: add stub code for efuse/esp_gdbstub/esp_phy

Only stub code for these components:
 * efuse
 * esp_gdbstub
 * esp_phy

components/efuse/esp32h2/include/esp_efuse_rtc_calib.h

@@ -0,0 +1,54 @@
+/*
+ * SPDX-FileCopyrightText: 2020-2021 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 RTC calibration efuse version
+ *
+ * @return Version of the stored efuse
+ */
+int esp_efuse_rtc_calib_get_ver(void);
+
+/**
+ * @brief Get the init code in the efuse, for the corresponding attenuation.
+ *
+ * @param version Version of the stored efuse
+ * @param atten  Attenuation of the init code
+ * @return The init code stored in efuse
+ */
+uint16_t esp_efuse_rtc_calib_get_init_code(int version, int atten);
+
+/**
+ * @brief Get the calibration digits stored in the efuse, and the corresponding voltage.
+ *
+ * @param version Version of the stored efuse
+ * @param atten         Attenuation to use
+ * @param out_digi      Output buffer of the digits
+ * @param out_vol_mv    Output of the voltage, in mV
+ * @return
+ *      - ESP_ERR_INVALID_ARG: If efuse version or attenuation is invalid
+ *      - ESP_OK: if success
+ */
+esp_err_t esp_efuse_rtc_calib_get_cal_voltage(int version, int atten, uint32_t* out_digi, uint32_t* out_vol_mv);
+
+/**
+ * @brief Get the temperature sensor calibration number delta_T stored in the efuse.
+ *
+ * @param version Version of the stored efuse
+ *
+ * @return The specification of temperature sensor calibration number in efuse.
+ */
+float esp_efuse_rtc_calib_get_cal_temp(int version);
+
+#ifdef __cplusplus
+}
+#endif