[Nokia-7215-A1] Update platform to add DC support (#20592)

1) Add support for DC PSU
2) Enhance watchdog service

Author: Pavan-Nokia

platform/marvell/sonic-platform-nokia/7215-a1/service/cpu_wdt.service

@@ -1,5 +1,6 @@
 [Unit]
 Description=CPU WDT
+Conflicts=watchdog-control.service
 After=nokia-7215init.service
 [Service]
 ExecStart=/usr/local/bin/cpu_wdt.py

platform/marvell/sonic-platform-nokia/7215-a1/sonic_platform/chassis.py

@@ -98,7 +98,7 @@ def __init__(self):
                 self._fan_list.append(fan)
 
         for i in range(MAX_7215_PSU):
-            psu = Psu(i)
+            psu = Psu(i, self.get_model())
             self._psu_list.append(psu)
 
         for i in range(MAX_7215_THERMAL):

platform/marvell/sonic-platform-nokia/7215-a1/sonic_platform/eeprom.py

@@ -40,13 +40,13 @@ def __init__(self, is_psu=False, psu_index=0, is_fan=False, fan_index=0):
             if self.is_psu_eeprom:
                 self.index = psu_index
                 self.part_number = '1'
-                self.model_str = 'PJT-12V100WBBA'
+                self.model_str = 'NA'
                 self.serial_number = 'NA'               
 
             if self.is_fan_eeprom:
                 self.index = fan_index
                 self.part_number = '1'
-                self.model_str = 'FFB0412UHN-BC2EA12'
+                self.model_str = 'NA'
                 self.serial_number = 'NA'                
 
 

platform/marvell/sonic-platform-nokia/7215-a1/sonic_platform/fan.py

@@ -181,7 +181,7 @@ def get_direction(self):
         """
         ch_model=self.get_chassis_model()
         #compare first 8 characters of chassis molel string
-        if(ch_model[:8]=='3HE18723'):
+        if(ch_model[:8]=='3HE18723' or ch_model[:8]=='3HE20994' ):
             direction = 'intake'
         else:
             direction = 'exhaust'

platform/marvell/sonic-platform-nokia/7215-a1/sonic_platform/psu.py

@@ -25,12 +25,12 @@
 class Psu(PsuBase):
     """Nokia platform-specific PSU class for 7215 """
 
-    def __init__(self, psu_index):
+    def __init__(self, psu_index, chassis_model):
         PsuBase.__init__(self)
         # PSU is 1-based in Nokia platforms
         self.index = psu_index + 1
         self._fan_list = []
-        
+        self.chassis_model = chassis_model
 
         # PSU eeprom
         self.eeprom = Eeprom(is_psu=True, psu_index=self.index)
@@ -90,7 +90,16 @@ def _get_active_psus(self):
         active_psus = int(psu1_good) + int(psu2_good)
 
         return active_psus
+    
+    def get_chassis_model(self):
+        """
+        Retrieves the model number of the Fan
 
+        Returns:
+            string: Model number of Fan. Use part number for this.
+        """
+        return self.chassis_model
+    
     def get_name(self):
         """
         Retrieves the name of the device
@@ -118,7 +127,14 @@ def get_model(self):
         Returns:
             string: Part number of PSU
         """
-        return self.eeprom.modelstr()
+        ch_model=self.get_chassis_model()
+        #compare first 8 characters of chassis molel string
+        if(ch_model[:8]=='3HE18723' or ch_model[:8]=='3HE18724' ):
+            model = 'AC-PSU'
+        else:
+            model = 'DC-PSU'
+
+        return model
 
     def get_serial(self):
         """

platform/marvell/sonic-platform-nokia/debian/sonic-platform-nokia-7215-a1.postinst

@@ -26,6 +26,7 @@ case "$1" in
         systemctl enable nokia-7215init.service
         systemctl start nokia-7215init.service
 
+        systemctl mask --now watchdog-control.service
         systemctl enable cpu_wdt.service
         systemctl start cpu_wdt.service