script to do voltage sweep

old-commit-hash: a1fb21e066b92d3276e8fd94d80c9922b2bdcb36

selfdrive/debug/internal/voltage_sweep.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+import os
+import time
+
+os.system("echo 1 > /sys/kernel/debug/regulator/pm8994_s11/enable")
+
+for i in range(900000, 465000, -10000):
+  print("setting voltage to",i)
+  os.system("echo %d %d > /sys/kernel/debug/regulator/pm8994_s11/voltage" % (i,i))
+  time.sleep(1)
+
+