feat(dbus): Add support for configuring 'revpi-con-can' feature

Introduce the `configure_con_can` function to manage enabling,
disabling, status checking, and availability of the 'revpi-con-can'
feature. Update the `AVAILABLE_FEATURES` dictionary to integrate
'revpi-con-can' as a configurable feature.

src/revpi_middleware/dbus_middleware1/system_config/revpi_config.py

@@ -6,11 +6,10 @@ import shutil
 import subprocess
 from collections import namedtuple
 from enum import Enum, IntEnum
-from glob import glob
 from logging import getLogger
 from os import X_OK, access
-from os.path import exists, join
-from typing import List, Optional
+from os.path import exists
+from typing import List
 
 from pydbus import SystemBus
 
@@ -20,7 +19,6 @@ log = getLogger(__name__)
 
 ConfigVariable = namedtuple("ConfigVariable", ["name", "value", "line_index"])
 
-LINUX_WIFI_CLASS_PATH = "/sys/class/ieee80211"
 CONFIG_TXT_LOCATIONS = ("/boot/firmware/config.txt", "/boot/config.txt")
 
 
@@ -47,8 +45,6 @@ class RevPiConfig:
         self._cm_with_wifi = False
 
         self._revpi_with_con_bridge = False
-        self._wlan_class_path = ""
-        self._wlan_rfkill_index = None
 
         self.serial = ""
         self.model = ""
@@ -85,26 +81,8 @@ class RevPiConfig:
         # Detect WiFi on CM module
         could_have_wifi = self._cm_type in (ComputeModuleTypes.CM4, ComputeModuleTypes.CM5)
         if could_have_wifi:
-            wifi_interface = join(LINUX_WIFI_CLASS_PATH, "phy0")
-            lst_grep = grep("DRIVER=brcmfmac", join(wifi_interface, "device", "uevent"))
-            self._cm_with_wifi = len(lst_grep) > 0
-            self._wlan_class_path = wifi_interface
-
-        # If no build in Wi-Fi on the CM, detect third party Wi-Fi on RevPi Flat
-        if not self._cm_with_wifi and grep("revpi-flat", "/proc/device-tree/compatible"):
-            lst_wifi_interfaces = glob("/sys/class/ieee80211/*")
-            for wifi_interface in lst_wifi_interfaces:
-                if grep("DRIVER=mwifiex_sdio", join(wifi_interface, "device", "uevent")):
-                    self._cm_with_wifi = True
-                    self._wlan_class_path = wifi_interface
-
-        # Detect rfkill index of the integrated Wi-Fi device
-        if self._wlan_class_path:
-            for rfkill_path in glob(join(self._wlan_class_path, "rfkill*")):
-                match_index = re.match(r"^/.+/rfkill(?P<index>\d+)$", rfkill_path)
-                if match_index:
-                    self._wlan_rfkill_index = int(match_index.group("index"))
-                    break
+            lst_grep = grep("DRIVER=brcmfmac", "/sys/class/ieee80211/phy0/device/uevent")
+            self._cm_with_wifi = len(lst_grep) > 0 and self._cm_type in (ComputeModuleTypes)
 
         # Detect ConBridge
         could_have_con_bridge = self._cm_type in (ComputeModuleTypes.CM3, ComputeModuleTypes.CM4S)
@@ -116,10 +94,6 @@ class RevPiConfig:
     def cm_type(self) -> ComputeModuleTypes:
         return self._cm_type
 
-    @property
-    def rfkill_index(self) -> Optional[int]:
-        return self._wlan_rfkill_index
-
     @property
     def with_con_bridge(self) -> bool:
         return self._revpi_with_con_bridge
@@ -357,8 +331,6 @@ if __name__ == "__main__":
     print("Serial:         ", rc.serial)
     print("CM Type:        ", rc.cm_type.name)
     print("With wifi:      ", rc.with_wifi)
-    if rc.with_wifi:
-        print("  rfkill index: ", rc.rfkill_index)
     print("With con-bridge:", rc.with_con_bridge)
 
     config_txt = ConfigTxt()