common gpio path variable

6 files changed, 14 insertions, 6 deletions

diff --git a/Makefile b/Makefile
index a134acac..e8467361 100644
--- a/Makefile
+++ b/Makefile
@@ -89,6 +89,7 @@ run: testenv $(TESTENV_GPIO)
 			--volume `pwd`/contrib/keymaps:/usr/share/kvmd/keymaps:ro \
 			--device $(TESTENV_VIDEO):$(TESTENV_VIDEO) \
 			--device $(TESTENV_GPIO):$(TESTENV_GPIO) \
+			--env KVMD_GPIO_DEVICE_PATH=$(TESTENV_GPIO) \
 			$(if $(TESTENV_RELAY),--device $(TESTENV_RELAY):$(TESTENV_RELAY),) \
 			--publish 8080:80/tcp \
 		-it $(TESTENV_IMAGE) /bin/bash -c " \
diff --git a/kvmd/aiogp.py b/kvmd/aiogp.py
index 100bcd4c..2f988e67 100644
--- a/kvmd/aiogp.py
+++ b/kvmd/aiogp.py
@@ -20,6 +20,7 @@
 # ========================================================================== #
 
 
+import os
 import asyncio
 import threading
 
@@ -32,6 +33,12 @@ from . import aiotools
 
 
 # =====
+# XXX: Do not use this variable for any purpose other than testing.
+# It can be removed at any time.
+DEVICE_PATH = os.getenv("KVMD_GPIO_DEVICE_PATH", "/dev/gpiochip0")
+
+
+# =====
 async def pulse(line: gpiod.Line, delay: float, final: float) -> None:
     try:
         line.set_value(1)
diff --git a/kvmd/plugins/atx/gpio.py b/kvmd/plugins/atx/gpio.py
index 5ca611ef..851e4ab4 100644
--- a/kvmd/plugins/atx/gpio.py
+++ b/kvmd/plugins/atx/gpio.py
@@ -73,7 +73,7 @@ class Plugin(BaseAtx):  # pylint: disable=too-many-instance-attributes
         self.__reset_switch_line: Optional[gpiod.Line] = None
 
         self.__reader = aiogp.AioPinsReader(
-            path="/dev/gpiochip0",
+            path=aiogp.DEVICE_PATH,
             consumer="kvmd/atx-gpio/leds",
             pins={
                 power_led_pin: power_led_inverted,
@@ -101,7 +101,7 @@ class Plugin(BaseAtx):  # pylint: disable=too-many-instance-attributes
         assert self.__power_switch_line is None
         assert self.__reset_switch_line is None
 
-        self.__chip = gpiod.Chip("/dev/gpiochip0")
+        self.__chip = gpiod.Chip(aiogp.DEVICE_PATH)
 
         self.__power_switch_line = self.__chip.get_line(self.__power_switch_pin)
         self.__power_switch_line.request("kvmd/atx-gpio/power_switch", gpiod.LINE_REQ_DIR_OUT, default_val=0)
diff --git a/kvmd/plugins/hid/serial.py b/kvmd/plugins/hid/serial.py
index 27218323..c07ea45c 100644
--- a/kvmd/plugins/hid/serial.py
+++ b/kvmd/plugins/hid/serial.py
@@ -170,7 +170,7 @@ class _Gpio:
         if self.__reset_pin >= 0:
             assert self.__chip is None
             assert self.__reset_line is None
-            self.__chip = gpiod.Chip("/dev/gpiochip0")
+            self.__chip = gpiod.Chip(aiogp.DEVICE_PATH)
             self.__reset_line = self.__chip.get_line(self.__reset_pin)
             self.__reset_line.request("kvmd/hid-serial/reset", gpiod.LINE_REQ_DIR_OUT, default_val=0)
 
diff --git a/kvmd/plugins/msd/relay.py b/kvmd/plugins/msd/relay.py
index 227dff46..cec03377 100644
--- a/kvmd/plugins/msd/relay.py
+++ b/kvmd/plugins/msd/relay.py
@@ -174,7 +174,7 @@ class _Gpio:
         assert self.__target_line is None
         assert self.__reset_line is None
 
-        self.__chip = gpiod.Chip("/dev/gpiochip0")
+        self.__chip = gpiod.Chip(aiogp.DEVICE_PATH)
 
         self.__target_line = self.__chip.get_line(self.__target_pin)
         self.__target_line.request("kvmd/msd-relay/target", gpiod.LINE_REQ_DIR_OUT, default_val=0)
diff --git a/kvmd/plugins/ugpio/gpio.py b/kvmd/plugins/ugpio/gpio.py
index aa43caf1..16e0b516 100644
--- a/kvmd/plugins/ugpio/gpio.py
+++ b/kvmd/plugins/ugpio/gpio.py
@@ -59,13 +59,13 @@ class Plugin(BaseUserGpioDriver):
     def prepare(self) -> None:
         assert self.__reader is None
         self.__reader = aiogp.AioPinsReader(
-            path="/dev/gpiochip0",
+            path=aiogp.DEVICE_PATH,
             consumer="kvmd/ugpio-gpio/inputs",
             pins=dict.fromkeys(self.__input_pins, False),
             notifier=self._notifier,
         )
 
-        self.__chip = gpiod.Chip("/dev/gpiochip0")
+        self.__chip = gpiod.Chip(aiogp.DEVICE_PATH)
         for (pin, initial) in self.__output_pins.items():
             line = self.__chip.get_line(pin)
             line.request("kvmd/ugpio-gpio/outputs", gpiod.LINE_REQ_DIR_OUT, default_val=int(initial or False))