Increase Volt's steering limit (#351)

* Increase Volt's steering limit

* Merge panda subtree

old-commit-hash: 2d450bc3a8

panda/VERSION

@@ -1 +1 @@
-v1.1.4
+v1.1.5

panda/board/safety/safety_gm.h

@@ -8,7 +8,7 @@
 //      brake rising edge
 //      brake > 0mph
 
-const int GM_MAX_STEER = 255;
+const int GM_MAX_STEER = 300;
 const int GM_MAX_RT_DELTA = 128;          // max delta torque allowed for real time checks
 const int32_t GM_RT_INTERVAL = 250000;    // 250ms between real time checks
 const int GM_MAX_RATE_UP = 7;

panda/tests/safety/test_gm.py

@@ -5,7 +5,7 @@ import libpandasafety_py
 
 MAX_RATE_UP = 7
 MAX_RATE_DOWN = 17
-MAX_STEER = 255
+MAX_STEER = 300
 MAX_BRAKE = 350
 MAX_GAS = 3072
 MAX_REGEN = 1404

selfdrive/car/gm/carcontroller.py

@@ -11,7 +11,7 @@ from selfdrive.can.packer import CANPacker
 class CarControllerParams():
   def __init__(self, car_fingerprint):
     if car_fingerprint == CAR.VOLT:
-      self.STEER_MAX = 255
+      self.STEER_MAX = 300
       self.STEER_STEP = 2              # how often we update the steer cmd
       self.STEER_DELTA_UP = 7          # ~0.75s time to peak torque (255/50hz/0.75s)
       self.STEER_DELTA_DOWN = 17       # ~0.3s from peak torque to zero