temperature_sensor: Add temperature sensor support for ESP32-C2

components/hal/esp32c2/include/hal/clk_gate_ll.h

@@ -57,6 +57,8 @@ static inline uint32_t periph_ll_get_clk_en_mask(periph_module_t periph)
         return SYSTEM_BT_BASEBAND_EN;
     case PERIPH_BT_LC_MODULE:
         return SYSTEM_BT_LC_EN;
+    case PERIPH_TEMPSENSOR_MODULE:
+        return SYSTEM_TSENS_CLK_EN;
     default:
         return 0;
     }
@@ -90,6 +92,8 @@ static inline uint32_t periph_ll_get_rst_en_mask(periph_module_t periph, bool en
         return SYSTEM_SPI01_RST;
     case PERIPH_SPI2_MODULE:
         return SYSTEM_SPI2_RST;
+    case PERIPH_TEMPSENSOR_MODULE:
+        return SYSTEM_TSENS_RST;
     case PERIPH_SHA_MODULE:
         if (enable == true) {
             // Clear reset on digital signature and HMAC, otherwise SHA is held in reset
@@ -119,6 +123,7 @@ static uint32_t periph_ll_get_clk_en_reg(periph_module_t periph)
     case PERIPH_SHA_MODULE:
     case PERIPH_GDMA_MODULE:
     case PERIPH_ECC_MODULE:
+    case PERIPH_TEMPSENSOR_MODULE:
         return SYSTEM_PERIP_CLK_EN1_REG;
     default:
         return SYSTEM_PERIP_CLK_EN0_REG;
@@ -140,6 +145,7 @@ static uint32_t periph_ll_get_rst_en_reg(periph_module_t periph)
     case PERIPH_SHA_MODULE:
     case PERIPH_GDMA_MODULE:
     case PERIPH_ECC_MODULE:
+    case PERIPH_TEMPSENSOR_MODULE:
         return SYSTEM_PERIP_RST_EN1_REG;
     default:
         return SYSTEM_PERIP_RST_EN0_REG;

components/hal/esp32c2/include/hal/regi2c_ctrl_ll.h

@@ -39,6 +39,15 @@ static inline __attribute__((always_inline)) void regi2c_ctrl_ll_bbpll_calibrati
     REG_SET_BIT(I2C_MST_ANA_CONF0_REG, I2C_MST_BBPLL_STOP_FORCE_LOW);
 }
 
+/**
+ * @brief Enable I2C_SAR
+ */
+static inline void regi2c_ctrl_ll_i2c_saradc_enable(void)
+{
+    CLEAR_PERI_REG_MASK(ANA_CONFIG_REG, ANA_I2C_SAR_FORCE_PD);
+    SET_PERI_REG_MASK(ANA_CONFIG2_REG, ANA_I2C_SAR_FORCE_PU);
+}
+
 #ifdef __cplusplus
 }
 #endif

components/hal/esp32c2/include/hal/temperature_sensor_ll.h

@@ -0,0 +1,135 @@
+/*
+ * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/*******************************************************************************
+ * NOTICE
+ * The hal is not public api, don't use in application code.
+ * See readme.md in component/hal/readme.md
+ ******************************************************************************/
+
+// The LL for temperature sensor
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include "esp_private/regi2c_ctrl.h"
+#include "soc/regi2c_saradc.h"
+#include "soc/apb_saradc_struct.h"
+#include "soc/soc.h"
+#include "soc/soc_caps.h"
+#include "hal/temperature_sensor_types.h"
+#include "hal/assert.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define TEMPERATURE_SENSOR_LL_ADC_FACTOR     (0.4386)
+#define TEMPERATURE_SENSOR_LL_DAC_FACTOR     (27.88)
+#define TEMPERATURE_SENSOR_LL_OFFSET_FACTOR  (20.52)
+
+/**
+ * @brief Enable the temperature sensor power.
+ *
+ * @param enable true: enable the power.
+ */
+static inline void temperature_sensor_ll_enable(bool enable)
+{
+    APB_SARADC.saradc_apb_tsens_ctrl.saradc_reg_tsens_pu = enable;
+}
+
+/**
+ * @brief Enable the clock
+ */
+static inline void temperature_sensor_ll_clk_enable(bool enable)
+{
+    // No need to enable the temperature clock on esp32c2
+}
+
+/**
+ * @brief Select the clock source for temperature sensor. On ESP32-C2, temperautre sensor
+ *        can use XTAL or FOSC. To make it convenience, suggest using XTAL all the time.
+ *
+ * @param clk_src refer to ``temperature_sensor_clk_src_t``
+ */
+static inline void temperature_sensor_ll_clk_sel(temperature_sensor_clk_src_t clk_src)
+{
+    uint8_t clk_sel = 0;
+    switch (clk_src) {
+        case TEMPERATURE_SENSOR_CLK_SRC_XTAL:
+            clk_sel = 1;
+            break;
+        case TEMPERATURE_SENSOR_CLK_SRC_RC_FAST:
+            clk_sel = 0;
+            break;
+        default:
+            HAL_ASSERT(false);
+            break;
+    }
+    APB_SARADC.saradc_apb_tsens_ctrl2.saradc_tsens_clk_sel = clk_sel;
+}
+
+/**
+ * @brief Set the hardware range, you can refer to the table ``temperature_sensor_attributes``
+ *
+ * @param tsens_dac ``reg_val`` in table ``temperature_sensor_attributes``
+ */
+static inline void temperature_sensor_ll_set_range(uint32_t range)
+{
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, I2C_SARADC_TSENS_DAC, range);
+}
+
+/**
+ * @brief Get the raw value of temperature sensor.
+ *
+ * @return uint32_t raw_value
+ */
+static inline uint32_t temperature_sensor_ll_get_raw_value(void)
+{
+    return APB_SARADC.saradc_apb_tsens_ctrl.saradc_reg_tsens_out;
+}
+
+/**
+ * @brief Get the offset value of temperature sensor.
+ *
+ * @note This function is only used in legacy driver
+ *
+ * @return uint32_t offset value
+ */
+static inline uint32_t temperature_sensor_ll_get_offset(void)
+{
+    return REGI2C_READ_MASK(I2C_SAR_ADC, I2C_SARADC_TSENS_DAC);
+}
+
+/**
+ * @brief Get the clock division factor value.
+ *
+ * @note This function is only used in legacy driver
+ *
+ * @return uint32_t clock division factor
+ */
+static inline uint32_t temperature_sensor_ll_get_clk_div(void)
+{
+    return APB_SARADC.saradc_apb_tsens_ctrl.saradc_reg_tsens_clk_div;
+}
+
+/**
+ * @brief Set the clock division factor value, actually this has no impact on temperature sensor.
+ *        Suggest just keep it as default value 6.
+ *
+ * @note This function is only used in legacy driver
+ *
+ * @param clk_div clock division factor, range from 1-10
+ */
+static inline void temperature_sensor_ll_set_clk_div(uint8_t clk_div)
+{
+    APB_SARADC.saradc_apb_tsens_ctrl.saradc_reg_tsens_clk_div = clk_div;
+}
+
+#ifdef __cplusplus
+}
+#endif