Added generation of protected methods documentation

Author: CDarius

axp192.py

@@ -600,7 +600,7 @@ def _set_gpio_pwm_out(self, gpio_num: int, duty_cycle: int) -> None:
         PWM Output voltage is VINT (2.5V)
 
         :param int gpio_num: Number of the GPIO to set as PWM output. Allowed values: 1 or 2
-        :param int duty_cyle = PWM duty cycle. Range 0-255
+        :param int duty_cyle: PWM duty cycle. Range 0-255
         """
         self.__validate_gpio_num(gpio_num)
         if 1 <= gpio_num <= 2:
@@ -647,7 +647,6 @@ def _is_gpio_pwm_out(self, gpio_num: int) -> bool:
         :param int gpio_num: Number of the GPIO to check. Allowed values: 1, 2
         :returns: True when GPIO is in PWM output mode
         :rtype: bool
-
         """
         self.__validate_gpio_num(gpio_num)
         if 1 <= gpio_num <= 2:

docs/api.rst

@@ -6,3 +6,5 @@
 
 .. automodule:: axp192
     :members:
+    :private-members:
+    :no-undoc-members: