docs(ledc): Document ledc set and get clock source

cores/esp32/esp32-hal-ledc.h

@@ -67,6 +67,8 @@ ledc_clk_cfg_t ledcGetClockSource(void);
 
 /**
  * @brief Set the LEDC clock source.
+ * 
+ * @param source LEDC clock source to set.
  *
  * @return true if LEDC clock source was successfully set, false otherwise.
  */

docs/en/api/ledc.rst

@@ -23,6 +23,34 @@ ESP32-H2  6
 Arduino-ESP32 LEDC API
 ----------------------
 
+ledcSetCLockSource
+******************
+
+This function is used to set the LEDC peripheral clock source. The default clock source is XTAL clock (``LEDC_USE_XTAL_CLK``) if supported by the SoC, 
+otherwise it is AUTO clock (``LEDC_AUTO_CLK``).
+
+.. code-block:: arduino
+
+    bool ledcSetClockSource(ledc_clk_cfg_t source);
+
+* ``source`` select the clock source for LEDC peripheral. 
+
+  * ``LEDC_APB_CLK`` - APB clock.
+  * ``LEDC_REF_CLK`` - REF clock.
+
+This function will return ``true`` if setting the clock source is successful, otherwise it will return ``false``.
+
+ledcGetClockSource
+******************
+
+This function is used to get the LEDC peripheral clock source.
+
+.. code-block:: arduino
+
+    ledc_clk_cfg_t ledcGetClockSource(void);
+
+This function will return the clock source for the LEDC peripheral.
+
 ledcAttach
 **********