hardware: move gpio_export (#29154)

old-commit-hash: eec99436c1c5489e2e49dc0760725f6fc6b9e47d

common/gpio.py

@@ -25,6 +25,13 @@ def gpio_read(pin: int) -> Optional[bool]:
 
   return val
 
+def gpio_export(pin: int):
+  try:
+    with open("/sys/class/gpio/export", 'w') as f:
+      f.write(str(pin))
+  except Exception:
+    print(f"Failed to export gpio {pin}")
+
 @lru_cache(maxsize=None)
 def get_irq_action(irq: int) -> List[str]:
   try:

system/hardware/tici/power_draw_test.py

@@ -4,7 +4,7 @@ import time
 import numpy as np
 from system.hardware.tici.hardware import Tici
 from system.hardware.tici.pins import GPIO
-from common.gpio import gpio_init, gpio_set
+from common.gpio import gpio_init, gpio_set, gpio_export
 
 def read_power():
   with open("/sys/bus/i2c/devices/0-0040/hwmon/hwmon1/in1_input") as f:
@@ -33,13 +33,6 @@ def read_power_avg():
   return "total %7.2f mW  SOM %7.2f mW" % (power_total, power_som)
 
 
-def gpio_export(pin):
-  try:
-    with open("/sys/class/gpio/export", 'w') as f:
-      f.write(str(pin))
-  except Exception:
-    print(f"Failed to export gpio {pin}")
-
 if __name__ == "__main__":
   gpio_export(GPIO.CAM0_AVDD_EN)
   gpio_export(GPIO.CAM0_RSTN)