change(esp_hw_support): add interface to calculate slow clock period by clock frequency

components/esp_hw_support/port/esp32/rtc_time.c

@@ -188,3 +188,5 @@ uint32_t rtc_clk_freq_cal(uint32_t cal_val)
     }
     return 1000000ULL * (1 << RTC_CLK_CAL_FRACT) / cal_val;
 }
+
+uint32_t rtc_clk_freq_to_period(uint32_t) __attribute__((alias("rtc_clk_freq_cal")));

components/esp_hw_support/port/esp32c2/rtc_time.c

@@ -188,3 +188,5 @@ uint32_t rtc_clk_freq_cal(uint32_t cal_val)
     }
     return 1000000ULL * (1 << RTC_CLK_CAL_FRACT) / cal_val;
 }
+
+uint32_t rtc_clk_freq_to_period(uint32_t) __attribute__((alias("rtc_clk_freq_cal")));

components/esp_hw_support/port/esp32c3/rtc_time.c

@@ -191,3 +191,5 @@ uint32_t rtc_clk_freq_cal(uint32_t cal_val)
     }
     return 1000000ULL * (1 << RTC_CLK_CAL_FRACT) / cal_val;
 }
+
+uint32_t rtc_clk_freq_to_period(uint32_t) __attribute__((alias("rtc_clk_freq_cal")));

components/esp_hw_support/port/esp32c6/rtc_time.c

@@ -264,3 +264,5 @@ uint32_t rtc_clk_freq_cal(uint32_t cal_val)
     }
     return 1000000ULL * (1 << RTC_CLK_CAL_FRACT) / cal_val;
 }
+
+uint32_t rtc_clk_freq_to_period(uint32_t) __attribute__((alias("rtc_clk_freq_cal")));

components/esp_hw_support/port/esp32h2/rtc_time.c

@@ -267,3 +267,5 @@ uint32_t rtc_clk_freq_cal(uint32_t cal_val)
     }
     return 1000000ULL * (1 << RTC_CLK_CAL_FRACT) / cal_val;
 }
+
+uint32_t rtc_clk_freq_to_period(uint32_t) __attribute__((alias("rtc_clk_freq_cal")));

components/esp_hw_support/port/esp32s2/rtc_time.c

@@ -256,3 +256,5 @@ uint32_t rtc_clk_freq_cal(uint32_t cal_val)
     }
     return 1000000ULL * (1 << RTC_CLK_CAL_FRACT) / cal_val;
 }
+
+uint32_t rtc_clk_freq_to_period(uint32_t) __attribute__((alias("rtc_clk_freq_cal")));

components/esp_hw_support/port/esp32s3/rtc_time.c

@@ -190,3 +190,5 @@ uint32_t rtc_clk_freq_cal(uint32_t cal_val)
     }
     return 1000000ULL * (1 << RTC_CLK_CAL_FRACT) / cal_val;
 }
+
+uint32_t rtc_clk_freq_to_period(uint32_t) __attribute__((alias("rtc_clk_freq_cal")));

components/soc/esp32/include/soc/rtc.h

@@ -488,6 +488,14 @@ bool rtc_dig_8m_enabled(void);
  */
 uint32_t rtc_clk_freq_cal(uint32_t cal_val);
 
+/**
+ * @brief Calculate the slow clock period value by slow clock frequency
+ *
+ * @param freq_hz Frequency of the slow clock in Hz
+ * @return Fixed point value of slow clock period in microseconds
+ */
+uint32_t rtc_clk_freq_to_period(uint32_t freq_hz);
+
 /**
  * @brief sleep configuration for rtc_sleep_init function
  */

components/soc/esp32c2/include/soc/rtc.h

@@ -514,6 +514,14 @@ bool rtc_dig_8m_enabled(void);
  */
 uint32_t rtc_clk_freq_cal(uint32_t cal_val);
 
+/**
+ * @brief Calculate the slow clock period value by slow clock frequency
+ *
+ * @param freq_hz Frequency of the slow clock in Hz
+ * @return Fixed point value of slow clock period in microseconds
+ */
+uint32_t rtc_clk_freq_to_period(uint32_t freq_hz);
+
 /**
  * @brief Power down flags for rtc_sleep_pd function
  */

components/soc/esp32c3/include/soc/rtc.h

@@ -541,6 +541,14 @@ bool rtc_dig_8m_enabled(void);
  */
 uint32_t rtc_clk_freq_cal(uint32_t cal_val);
 
+/**
+ * @brief Calculate the slow clock period value by slow clock frequency
+ *
+ * @param freq_hz Frequency of the slow clock in Hz
+ * @return Fixed point value of slow clock period in microseconds
+ */
+uint32_t rtc_clk_freq_to_period(uint32_t freq_hz);
+
 /**
  * @brief Power down flags for rtc_sleep_pd function
  */

components/soc/esp32c6/include/soc/rtc.h

@@ -485,6 +485,14 @@ bool rtc_dig_8m_enabled(void);
  */
 uint32_t rtc_clk_freq_cal(uint32_t cal_val);
 
+/**
+ * @brief Calculate the slow clock period value by slow clock frequency
+ *
+ * @param freq_hz Frequency of the slow clock in Hz
+ * @return Fixed point value of slow clock period in microseconds
+ */
+uint32_t rtc_clk_freq_to_period(uint32_t freq_hz);
+
 
 // -------------------------- CLOCK TREE DEFS ALIAS ----------------------------
 // **WARNING**: The following are only for backwards compatibility.

components/soc/esp32h2/include/soc/rtc.h

@@ -482,6 +482,14 @@ bool rtc_dig_8m_enabled(void);
  */
 uint32_t rtc_clk_freq_cal(uint32_t cal_val);
 
+/**
+ * @brief Calculate the slow clock period value by slow clock frequency
+ *
+ * @param freq_hz Frequency of the slow clock in Hz
+ * @return Fixed point value of slow clock period in microseconds
+ */
+uint32_t rtc_clk_freq_to_period(uint32_t freq_hz);
+
 // -------------------------- CLOCK TREE DEFS ALIAS ----------------------------
 // **WARNING**: The following are only for backwards compatibility.
 // Please use the declarations in soc/clk_tree_defs.h instead.

components/soc/esp32s2/include/soc/rtc.h

@@ -574,6 +574,14 @@ bool rtc_dig_8m_enabled(void);
  */
 uint32_t rtc_clk_freq_cal(uint32_t cal_val);
 
+/**
+ * @brief Calculate the slow clock period value by slow clock frequency
+ *
+ * @param freq_hz Frequency of the slow clock in Hz
+ * @return Fixed point value of slow clock period in microseconds
+ */
+uint32_t rtc_clk_freq_to_period(uint32_t freq_hz);
+
 /**
  * @brief Power down flags for rtc_sleep_pd function
  */

components/soc/esp32s3/include/soc/rtc.h

@@ -554,6 +554,14 @@ bool rtc_dig_8m_enabled(void);
  */
 uint32_t rtc_clk_freq_cal(uint32_t cal_val);
 
+/**
+ * @brief Calculate the slow clock period value by slow clock frequency
+ *
+ * @param freq_hz Frequency of the slow clock in Hz
+ * @return Fixed point value of slow clock period in microseconds
+ */
+uint32_t rtc_clk_freq_to_period(uint32_t freq_hz);
+
 /**
  * @brief Power up flags for rtc_sleep_pd function
  */