Log SOM power draw (#24975)

* log SOM power draw

* bump cereal

Co-authored-by: Comma Device <device@comma.ai>
Co-authored-by: Willem Melching <willem.melching@gmail.com>

selfdrive/thermald/thermald.py

@@ -348,12 +348,13 @@ def thermald_thread(end_event, hw_queue):
     power_monitor.calculate(peripheralState, onroad_conditions["ignition"])
     msg.deviceState.offroadPowerUsageUwh = power_monitor.get_power_used()
     msg.deviceState.carBatteryCapacityUwh = max(0, power_monitor.get_car_battery_capacity())
-    current_power_draw = HARDWARE.get_current_power_draw()  # pylint: disable=assignment-from-none
-    if current_power_draw is not None:
-      statlog.sample("power_draw", current_power_draw)
-      msg.deviceState.powerDrawW = current_power_draw
-    else:
-      msg.deviceState.powerDrawW = 0
+    current_power_draw = HARDWARE.get_current_power_draw()
+    statlog.sample("power_draw", current_power_draw)
+    msg.deviceState.powerDrawW = current_power_draw
+    
+    som_power_draw = HARDWARE.get_som_power_draw()
+    statlog.sample("som_power_draw", som_power_draw)
+    msg.deviceState.somPowerDrawW = som_power_draw
 
     # Check if we need to disable charging (handled by boardd)
     msg.deviceState.chargingDisabled = power_monitor.should_disable_charging(onroad_conditions["ignition"], in_car, off_ts)

system/hardware/base.py

@@ -86,6 +86,10 @@ class HardwareBase(ABC):
   def get_current_power_draw(self):
     pass
 
+  @abstractmethod
+  def get_som_power_draw(self):
+    pass
+
   @abstractmethod
   def shutdown(self):
     pass

system/hardware/pc/hardware.py

@@ -55,6 +55,9 @@ class Pc(HardwareBase):
 
   def get_current_power_draw(self):
     return 0
+  
+  def get_som_power_draw(self):
+    return 0
 
   def shutdown(self):
     print("SHUTDOWN!")

system/hardware/tici/hardware.py

@@ -362,6 +362,9 @@ class Tici(HardwareBase):
   def get_current_power_draw(self):
     return (self.read_param_file("/sys/class/hwmon/hwmon1/power1_input", int) / 1e6)
 
+  def get_som_power_draw(self):
+    return (self.read_param_file("/sys/class/power_supply/bms/voltage_now", int) * self.read_param_file("/sys/class/power_supply/bms/current_now", int) / 1e12)
+
   def shutdown(self):
     # Note that for this to work and have the device stay powered off, the panda needs to be in UsbPowerMode::CLIENT!
     os.system("sudo poweroff")