prep for python pandad (#36155)

system/hardware/base.py

@@ -232,3 +232,12 @@ class HardwareBase(ABC):
 
   def get_modem_data_usage(self):
     return -1, -1
+
+  def get_voltage(self) -> float:
+    return 0.
+
+  def get_current(self) -> float:
+    return 0.
+
+  def set_ir_power(self, percent: int):
+    pass

system/hardware/tici/hardware.py

@@ -116,6 +116,26 @@ class Tici(HardwareBase):
   def get_serial(self):
     return self.get_cmdline()['androidboot.serialno']
 
+  def get_voltage(self):
+    with open("/sys/class/hwmon/hwmon1/in1_input") as f:
+      return int(f.read())
+
+  def get_current(self):
+    with open("/sys/class/hwmon/hwmon1/curr1_input") as f:
+      return int(f.read())
+
+  def set_ir_power(self, percent: int):
+    if self.get_device_type() in ("tici", "tizi"):
+      return
+
+    value = int((percent / 100) * 300)
+    with open("/sys/class/leds/led:switch_2/brightness", "w") as f:
+      f.write("0\n")
+    with open("/sys/class/leds/led:torch_2/brightness", "w") as f:
+      f.write(f"{value}\n")
+    with open("/sys/class/leds/led:switch_2/brightness", "w") as f:
+      f.write(f"{value}\n")
+
   def get_network_type(self):
     try:
       primary_connection = self.nm.Get(NM, 'PrimaryConnection', dbus_interface=DBUS_PROPS, timeout=TIMEOUT)