[BFN] Updated platform API for thermal (#8)

* Signed-off-by: Vadym Yashchenko <vadymx.yashchenko@intel.com>

platform/barefoot/sonic-platform-modules-bfn-montara/sonic_platform/thermal.py

@@ -68,10 +68,12 @@ def _value_get(d: dict, key_prefix, key_suffix=''):
 
 # Thermal -> ThermalBase -> DeviceBase
 class Thermal(ThermalBase):
-    def __init__(self, chip, label):
+    def __init__(self, chip, label, index = 0):
         self.__chip = chip
         self.__label = label
         self.__name = f"{chip}:{label}".lower().replace(' ', '-')
+        self.__collect_temp = []
+        self.__index = index
 
     def __get(self, attr_prefix, attr_suffix):
         sensor_data = _sensors_get().get(self.__chip, {}).get(self.__label, {})
@@ -80,7 +82,10 @@ def __get(self, attr_prefix, attr_suffix):
 
     # ThermalBase interface methods:
     def get_temperature(self) -> float:
-        return float(self.__get('temp', 'input'))
+        temp = self.__get('temp', 'input')
+        self.__collect_temp.append(float(temp))
+        self.__collect_temp.sort()
+        return float(temp)
 
     def get_high_threshold(self) -> float:
         return float(self.__get('temp', 'max'))
@@ -107,11 +112,38 @@ def get_status(self):
     def is_replaceable(self):
         return False
 
+    def get_low_threshold(self) -> float:
+        return float(self.__get('temp', 'min'))
+
+    def get_serial(self):
+        return 'N/A'
+
+    def get_minimum_recorded(self) -> float:
+        temp = self.__collect_temp[0] if len(self.__collect_temp) > 0 else 0.1
+        temp = temp if temp > 0.0 else 0.1
+        return float(temp)
+
+    def get_maximum_recorded(self) -> float:
+        temp = self.__collect_temp[-1] if len(self.__collect_temp) > 0 else 100.0
+        temp = temp if temp <= 100.0 else 100.0
+        return float(temp)
+
+    def get_position_in_parent(self):
+        return self.__index
+
+    def set_high_threshold(self, temperature):
+        return False
+
+    def set_low_threshold(self, temperature):
+        return False
+
 def thermal_list_get():
     l = []
+    index = 0
     for chip, chip_data in _sensors_get().items():
         for sensor, sensor_data in chip_data.items():
             # add only temperature sensors
             if _value_get(sensor_data, "temp") is not None:
-                l.append(Thermal(chip, sensor))
+                l.append(Thermal(chip, sensor, index))
+                index += 1
     return l