From: djhedges <djhedges@gmail.com>
Date: Fri, 22 Jul 2022 03:53:52 +0000 (-0700)
Subject: Only read the i2c events if the exist.  On the Bananan Pi M5 the ffd1c000.i2c is... 
X-Git-Tag: 8.1.0^2~7
X-Git-Url: https://git.ayoreis.com/Adafruit_Blinka-hackapet.git/commitdiff_plain/9e94212401114a95fa97462b787801302cf0c241

Only read the i2c events if the exist.  On the Bananan Pi M5 the ffd1c000.i2c is non-existent.
---

diff --git a/src/adafruit_blinka/microcontroller/amlogic/meson_g12_common/pin.py b/src/adafruit_blinka/microcontroller/amlogic/meson_g12_common/pin.py
index d920b1f..31ff8e1 100644
--- a/src/adafruit_blinka/microcontroller/amlogic/meson_g12_common/pin.py
+++ b/src/adafruit_blinka/microcontroller/amlogic/meson_g12_common/pin.py
@@ -11,6 +11,7 @@ Linux kernel 5.4.y (mainline)
     linux/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi
 """
 
+import os
 import re
 import gpiod
 from adafruit_blinka.microcontroller.generic_linux.libgpiod_pin import Pin
@@ -113,15 +114,16 @@ uartPorts = ((1, UART1_TX, UART1_RX),)
 def get_dts_alias(device: str) -> str:
     """Get the Device Tree Alias"""
     uevent_path = "/sys/bus/platform/devices/" + device + "/uevent"
-    with open(uevent_path, "r", encoding="utf-8") as fd:
-        pattern = r"^OF_ALIAS_0=(.*)$"
-        uevent = fd.read().split("\n")
-        for line in uevent:
-            match = re.search(pattern, line)
-            if match:
-                return match.group(1).upper()
-
-        return None
+    if os.path.exists(uevent_path):
+      with open(uevent_path, "r", encoding="utf-8") as fd:
+          pattern = r"^OF_ALIAS_0=(.*)$"
+          uevent = fd.read().split("\n")
+          for line in uevent:
+              match = re.search(pattern, line)
+              if match:
+                  return match.group(1).upper()
+
+          return None
 
 
 # ordered as i2cId, sclId, sdaId