Check exists hardware for audio/gpio devices (#753)

* Update hardware.py

* Update addon.py

* Update hardware.py

* Update addon.py

hassio/docker/addon.py

@@ -1,7 +1,6 @@
 """Init file for Hass.io add-on Docker object."""
 import logging
 import os
-from pathlib import Path
 
 import docker
 import requests
@@ -101,7 +100,7 @@ class DockerAddon(DockerInterface):
         devices = self.addon.devices or []
 
         # Use audio devices
-        if self.addon.with_audio and AUDIO_DEVICE not in devices:
+        if self.addon.with_audio and self.sys_hardware.support_audio:
             devices.append(AUDIO_DEVICE)
 
         # Auto mapping UART devices
@@ -216,10 +215,8 @@ class DockerAddon(DockerInterface):
         # Init other hardware mappings
 
         # GPIO support
-        if self.addon.with_gpio:
+        if self.addon.with_gpio and self.sys_hardware.support_gpio:
             for gpio_path in ("/sys/class/gpio", "/sys/devices/platform/soc"):
-                if not Path(gpio_path).exists():
-                    continue
                 volumes.update({
                     gpio_path: {
                         'bind': gpio_path, 'mode': 'rw'

hassio/misc/hardware.py

@@ -20,6 +20,7 @@ PROC_STAT = Path("/proc/stat")
 RE_BOOT_TIME = re.compile(r"btime (\d+)")
 
 GPIO_DEVICES = Path("/sys/class/gpio")
+SOC_DEVICES = Path("/sys/devices/platform/soc")
 RE_TTY = re.compile(r"tty[A-Z]+")
 
 
@@ -60,6 +61,11 @@ class Hardware:
 
         return dev_list
 
+    @property
+    def support_audio(self):
+        """Return True if the system have audio support."""
+        return bool(self.audio_devices)
+
     @property
     def audio_devices(self):
         """Return all available audio interfaces."""
@@ -68,10 +74,8 @@ class Hardware:
             return {}
 
         try:
-            with ASOUND_CARDS.open('r') as cards_file:
+            cards = ASOUND_CARDS.read_text()
-                cards = cards_file.read()
+            devices = ASOUND_DEVICES.read_text()
-            with ASOUND_DEVICES.open('r') as devices_file:
-                devices = devices_file.read()
         except OSError as err:
             _LOGGER.error("Can't read asound data: %s", err)
             return {}
@@ -97,6 +101,11 @@ class Hardware:
 
         return audio_list
 
+    @property
+    def support_gpio(self):
+        """Return True if device support GPIOs."""
+        return SOC_DEVICES.exists() and GPIO_DEVICES.exists()
+
     @property
     def gpio_devices(self):
         """Return list of GPIO interface on device."""