configurable gpio devices

kvmd/plugins/hid/_mcu/__init__.py

@@ -46,6 +46,7 @@ from ....validators.basic import valid_bool
 from ....validators.basic import valid_int_f0
 from ....validators.basic import valid_int_f1
 from ....validators.basic import valid_float_f01
+from ....validators.os import valid_abs_path
 from ....validators.hw import valid_gpio_pin_optional
 
 from .. import BaseHid
@@ -113,6 +114,7 @@ class BaseMcuHid(BaseHid, multiprocessing.Process):  # pylint: disable=too-many-
         self,
         phy: BasePhy,
 
+        gpio_device_path: str,
         reset_pin: int,
         reset_inverted: bool,
         reset_delay: float,
@@ -133,7 +135,7 @@ class BaseMcuHid(BaseHid, multiprocessing.Process):  # pylint: disable=too-many-
         self.__noop = noop
 
         self.__phy = phy
-        self.__gpio = Gpio(reset_pin, reset_inverted, reset_delay)
+        self.__gpio = Gpio(gpio_device_path, reset_pin, reset_inverted, reset_delay)
 
         self.__events_queue: "multiprocessing.Queue[BaseEvent]" = multiprocessing.Queue()
 
@@ -149,6 +151,7 @@ class BaseMcuHid(BaseHid, multiprocessing.Process):  # pylint: disable=too-many-
     @classmethod
     def get_plugin_options(cls) -> Dict:
         return {
+            "gpio_device":    Option("/dev/gpiochip0", type=valid_abs_path, unpack_as="gpio_device_path"),
             "reset_pin":      Option(-1,    type=valid_gpio_pin_optional),
             "reset_inverted": Option(False, type=valid_bool),
             "reset_delay":    Option(0.1,   type=valid_float_f01),

kvmd/plugins/hid/_mcu/gpio.py

@@ -30,18 +30,18 @@ import gpiod
 
 from ....logging import get_logger
 
-from .... import env
-
 
 # =====
 class Gpio:
     def __init__(
         self,
+        device_path: str,
         reset_pin: int,
         reset_inverted: bool,
         reset_delay: float,
     ) -> None:
 
+        self.__device_path = device_path
         self.__reset_pin = reset_pin
         self.__reset_inverted = reset_inverted
         self.__reset_delay = reset_delay
@@ -53,7 +53,7 @@ class Gpio:
         if self.__reset_pin >= 0:
             assert self.__chip is None
             assert self.__reset_line is None
-            self.__chip = gpiod.Chip(env.GPIO_DEVICE_PATH)
+            self.__chip = gpiod.Chip(self.__device_path)
             self.__reset_line = self.__chip.get_line(self.__reset_pin)
             self.__reset_line.request("kvmd::hid::reset", gpiod.LINE_REQ_DIR_OUT, default_vals=[int(self.__reset_inverted)])
 

kvmd/plugins/hid/spi.py

@@ -44,8 +44,6 @@ from ...validators.basic import valid_int_f1
 from ...validators.basic import valid_float_f01
 from ...validators.hw import valid_gpio_pin_optional
 
-from ... import env
-
 from ._mcu import BasePhyConnection
 from ._mcu import BasePhy
 from ._mcu import BaseMcuHid
@@ -100,6 +98,7 @@ class _SpiPhyConnection(BasePhyConnection):
 class _SpiPhy(BasePhy):  # pylint: disable=too-many-instance-attributes
     def __init__(
         self,
+        gpio_device_path: str,
         bus: int,
         chip: int,
         hw_cs: bool,
@@ -109,6 +108,7 @@ class _SpiPhy(BasePhy):  # pylint: disable=too-many-instance-attributes
         read_timeout: float,
     ) -> None:
 
+        self.__gpio_device_path = gpio_device_path
         self.__bus = bus
         self.__chip = chip
         self.__hw_cs = hw_cs
@@ -145,7 +145,7 @@ class _SpiPhy(BasePhy):  # pylint: disable=too-many-instance-attributes
     @contextlib.contextmanager
     def __sw_cs_connected(self) -> Generator[Optional[gpiod.Line], None, None]:
         if self.__sw_cs_pin > 0:
-            with contextlib.closing(gpiod.Chip(env.GPIO_DEVICE_PATH)) as chip:
+            with contextlib.closing(gpiod.Chip(self.__gpio_device_path)) as chip:
                 line = chip.get_line(self.__sw_cs_pin)
                 line.request("kvmd::hid::sw_cs", gpiod.LINE_REQ_DIR_OUT, default_vals=[1])
                 yield line
@@ -157,6 +157,7 @@ class _SpiPhy(BasePhy):  # pylint: disable=too-many-instance-attributes
 class Plugin(BaseMcuHid):
     def __init__(self, **kwargs: Any) -> None:
         phy_kwargs: Dict = {key: kwargs.pop(key) for key in self.__get_phy_options()}
+        phy_kwargs["gpio_device_path"] = kwargs["gpio_device_path"]
         super().__init__(phy=_SpiPhy(**phy_kwargs), **kwargs)
 
     @classmethod