tici: turn off fan after boot (#27680)

* tici: turn off fan after boot

* tmp if

---------

Co-authored-by: Comma Device <device@comma.ai>

system/hardware/tici/hardware.py

@@ -452,6 +452,12 @@ class Tici(HardwareBase):
     # Allow thermald to write engagement status to kmsg
     os.system("sudo chmod a+w /dev/kmsg")
 
+    # TODO: remove the if once agnos 7 ships
+    # Turn off fan, turned on by the ABL
+    if os.path.exists('/sys/class/gpio/gpio49/'):
+      gpio_init(GPIO.SOM_ST_IO, True)
+      gpio_set(GPIO.SOM_ST_IO, 0)
+
     # *** IRQ config ***
 
     # move these off the default core

system/hardware/tici/pins.py

@@ -10,6 +10,8 @@ class GPIO:
   STM_RST_N = 124
   STM_BOOT0 = 134
 
+  SOM_ST_IO = 49
+
   LTE_RST_N = 50
   LTE_PWRKEY = 116
   LTE_BOOT = 52