refactor(dbus): piControl driver reset with PiControlIoctl class

Replaces inline ioctl logic with the new `PiControlIoctl` class for
cleaner and reusable code. This improves readability, encapsulates
device operations, and simplifies error handling for resetting the
piControl driver.

src/revpi_middleware/dbus_middleware1/process_image/interface_picontrol.py

@@ -2,13 +2,11 @@
 # SPDX-FileCopyrightText: 2025 KUNBUS GmbH
 # SPDX-License-Identifier: GPL-2.0-or-later
 """D-Bus interfaces for piControl."""
-import os
-from fcntl import ioctl
 from logging import getLogger
 
 from pydbus.generic import signal
 
-from .process_image_helper import ResetDriverWatchdog
+from .process_image_helper import PiControlIoctl, ResetDriverWatchdog
 
 log = getLogger(__name__)
 
@@ -41,21 +39,9 @@ class InterfacePiControl:
         log.debug("enter InterfacePiControl.ResetDriver")
 
         try:
-            fd = os.open(self.picontrol_device, os.O_WRONLY)
-        except Exception as e:
-            log.warning(f"could not open ${self.picontrol_device} to reset driver")
-            raise e
-
-        execption = None
-        try:
-            # KB_RESET _IO('K', 12 )  // reset the piControl driver including the config file
-            ioctl(fd, 19212)
+            picontrol_ioctl = PiControlIoctl(self.picontrol_device)
+            picontrol_ioctl.ioctl(PiControlIoctl.IOCTL_RESET_DRIVER)
             log.info("reset piControl driver")
         except Exception as e:
             log.warning(f"could not reset piControl driver: ${e}")
-            execption = e
-        finally:
-            os.close(fd)
-
-        if execption:
-            raise execption
+            raise e

src/revpi_middleware/dbus_middleware1/process_image/process_image_helper.py

@@ -8,6 +8,7 @@ The ResetDriverWatchdog class is a copy of revpipyload project module "watchdogs
 https://github.com/naruxde/revpipyload/blob/b51c2b617a57cc7d96fd67e1da9f090a0624eacb/src/revpipyload/watchdogs.py
 """
 import os
+from ctypes import c_int
 from fcntl import ioctl
 from logging import getLogger
 from threading import Thread
@@ -100,3 +101,24 @@ class ResetDriverWatchdog(Thread):
         rc = self._triggered
         self._triggered = False
         return rc
+
+
+class PiControlIoctl:
+    IOCTL_RESET_DRIVER = 19212
+
+    def __init__(self, picontrol_device: str):
+        self.picontrol_device = picontrol_device
+
+    def ioctl(self, request, arg=0):
+        if type(arg) is c_int:
+            arg = arg.value
+
+        _fd = os.open(self.picontrol_device, os.O_WRONLY)
+        return_value = ioctl(_fd, 19212, arg)
+        os.close(_fd)
+
+        return return_value
+
+    @property
+    def name(self):
+        return self.picontrol_device