allwinner h618: support mainline gpiochip

[Adafruit_Blinka-hackapet.git] / src / adafruit_blinka / microcontroller / allwinner / h618 / pin.py

diff --git a/src/adafruit_blinka/microcontroller/allwinner/h618/pin.py b/src/adafruit_blinka/microcontroller/allwinner/h618/pin.py
index 7eabaa27bd3d2a0481d0e92908aa703b1cf93a86..34fdb6e1b363f42bf7d05b4c40610e048f1b10d8 100644 (file)
--- a/src/adafruit_blinka/microcontroller/allwinner/h618/pin.py
+++ b/src/adafruit_blinka/microcontroller/allwinner/h618/pin.py
@@ -3,13 +3,28 @@
 # SPDX-License-Identifier: MIT
 """Allwinner H618 Pin Names"""
 from adafruit_blinka.microcontroller.generic_linux.libgpiod_pin import Pin
+import re
 
-# gpiochip select
-__chip_num = 0
-with open("/sys/class/gpio/gpiochip0/label", "r") as f:
-    label = f.read().strip()
-    if label == "300b000.pinctrl":
-        __chip_num = 1
+def find_gpiochip_number(target_label):
+    try:
+        with open('/sys/kernel/debug/gpio', 'r') as f:
+            lines = f.readlines()
+    except FileNotFoundError:
+        print("The file /sys/kernel/debug/gpio does not exist.")
+        return None
+
+    gpiochip_number = None
+    for line in lines:
+        if target_label in line:
+            match = re.search(r'gpiochip(\d+)', line)
+            if match:
+                gpiochip_number = match.group(1)
+                break
+
+    return gpiochip_number
+
+__chip_num = 1
+__chip_num = gpiochip_number = find_gpiochip_number("300b000.pinctrl")
 
 PC0 = Pin((__chip_num, 64))
 SPI0_SCLK = PC0