gpiod: enable pullup/pulldown (#341)

flyte · Feb 26, 2024 · ec4c087 · ec4c087
1 parent 05c7111
commit ec4c087
Showing 1 changed file with 9 additions and 3 deletions.
diff --git a/mqtt_io/modules/gpio/gpiod.py b/mqtt_io/modules/gpio/gpiod.py
@@ -20,7 +20,7 @@
 }
 
 
-class GPIO(GenericGPIO):
+class GPIO(GenericGPIO):  # pylint: disable=too-many-instance-attributes
     """
     Implementation of GPIO class for libgpiod (linux kernel >= 4.8).
     """
@@ -42,6 +42,12 @@ def setup_module(self) -> None:
             PinDirection.OUTPUT: gpiod.line_request.DIRECTION_OUTPUT,
         }
 
+        self.flags_map = {
+            PinPUD.OFF: gpiod.line_request.FLAG_BIAS_DISABLE,
+            PinPUD.UP: gpiod.line_request.FLAG_BIAS_PULL_UP,
+            PinPUD.DOWN: gpiod.line_request.FLAG_BIAS_PULL_DOWN,
+        }
+
         self.interrupt_edge_map = {
             InterruptEdge.RISING: gpiod.line_request.EVENT_RISING_EDGE,
             InterruptEdge.FALLING: gpiod.line_request.EVENT_FALLING_EDGE,
@@ -63,14 +69,14 @@ def setup_pin(
         pullup:     pullup settings are not supported
         """
         # Pullup settings are called bias in libgpiod and are only
-        # available since Linux Kernel 5.5. They are as of now not
-        # yet part of python3-gpiod.
+        # available since Linux Kernel 5.5.
 
         line: "gpiod.line" = self.chip.get_line(pin)
 
         line_request = self.io.line_request()
         line_request.consumer = "mqtt-io"
         line_request.request_type = self.direction_map[direction]
+        line_request.flags = self.flags_map[pullup]
 
         if direction == PinDirection.OUTPUT:
             if initial is not None: