add new psu and fan API for platform API 1.0 (#62)

1) add new API to psu base class (1.0 APIs) to support PDDF CLI utils
2) Add fan_base class to support PDDF fan CLI utils

setup.py

@@ -18,6 +18,7 @@
         'sonic_platform_base.sonic_sfp',
         'sonic_platform_base.sonic_ssd',
         'sonic_psu',
+        'sonic_fan',
         'sonic_sfp',
     ],
     classifiers=[

sonic_fan/fan_base.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+#
+# fan_base.py
+#
+# Base class for implementing platform-specific
+#  FAN control functionality for SONiC
+#
+
+try:
+    import abc
+except ImportError as e:
+    raise ImportError (str(e) + " - required module not found")
+
+class FanBase(object):
+    __metaclass__ = abc.ABCMeta
+
+    def get_num_fans(self):
+        """
+        Retrieves the number of FANs supported on the device
+
+        :return: An integer, the number of FANs supported on the device
+        """
+        return 0
+
+    def get_status(self, index):
+        """
+        Retrieves the operational status of FAN defined
+                by index 1-based <index>
+
+        :param index: An integer, 1-based index of the PSU of which to query status
+        :return: Boolean,
+            - True if FAN is running with some speed 
+            - False if FAN has stopped running
+        """
+        return False
+
+    def get_presence(self, index):
+        """
+        Retrieves the presence status of a FAN defined
+                by 1-based index <index>
+
+        :param index: An integer, 1-based index of the FAN of which to query status
+        :return: Boolean, True if FAN is plugged, False if not
+        """
+        return False
+
+    def get_direction(self, index):
+        """
+        Retrieves the airflow direction of a FAN defined
+                by 1-based index <index>
+
+        :param index: An integer, 1-based index of the FAN of which to query status
+        :return: string, denoting FAN airflow direction
+        """
+        return ""
+
+    def get_speed(self, index):
+        """
+        Retrieves the speed of a Front FAN in the tray in revolutions per minute defined
+                by 1-based index <index>
+
+        :param index: An integer, 1-based index of the FAN of which to query speed
+        :return: integer, denoting front FAN speed
+        """
+        return 0
+
+    def get_speed_rear(self, index):
+        """
+        Retrieves the speed of a rear FAN in the tray (applicable only for 2-fan tray) 
+                in revolutions per minute defined by 1-based index <index>
+
+        :param index: An integer, 1-based index of the FAN of which to query speed
+        :return: integer, denoting rear FAN speed
+        """
+        return 0
+
+    def set_speed(self, val):
+        """
+        Sets the speed of all the FANs to a value denoted by the duty-cycle percentage val
+
+        :param val: An integer, <0-100> denoting FAN duty cycle percentage 
+        :return: Boolean, True if operation is successful, False if not
+        """
+        return False

sonic_psu/psu_base.py

@@ -47,3 +47,75 @@ def get_psu_presence(self, index):
         """
         return False
 
+    def get_model(self, idx):
+        """
+        Retrieves the model number/name of a power supply unit (PSU) defined
+                by 1-based index <idx>
+        :param idx: An integer, 1-based index of the PSU of which to query model number
+        :return: String, denoting model number/name
+        """
+        return ""
+
+    def get_mfr_id(self, idx):
+        """
+        Retrieves the manufacturing id of a power supply unit (PSU) defined
+                by 1-based index <idx>
+        :param idx: An integer, 1-based index of the PSU of which to query mfr id
+        :return: String, denoting manufacturing id
+        """
+        return ""
+
+    def get_serial(self, idx):
+        """
+        Retrieves the serial number of a power supply unit (PSU) defined
+                by 1-based index <idx>
+        :param idx: An integer, 1-based index of the PSU of which to query serial number
+        :return: String, denoting serial number of the PSU unit
+        """
+        return ""
+
+    def get_direction(self, idx):
+        """
+        Retrieves the airflow direction of a power supply unit (PSU) defined
+                by 1-based index <idx>
+        :param idx: An integer, 1-based index of the PSU of which to query airflow direction
+        :return: String, denoting the airflow direction
+        """
+        return ""
+
+    def get_output_voltage(self, idx):
+        """
+        Retrieves the ouput volatage in milli volts of a power supply unit (PSU) defined
+                by 1-based index <idx>
+        :param idx: An integer, 1-based index of the PSU of which to query o/p volatge
+        :return: An integer, value of o/p voltage in mV if PSU is good, else zero
+        """
+        return 0
+
+    def get_output_current(self, idx):
+        """
+        Retrieves the output current in milli amperes of a power supply unit (PSU) defined
+                by 1-based index <idx>
+        :param idx: An integer, 1-based index of the PSU of which to query o/p current
+        :return: An integer, value of o/p current in mA if PSU is good, else zero
+        """
+        return 0
+
+    def get_output_power(self, idx):
+        """
+        Retrieves the output power in micro watts of a power supply unit (PSU) defined
+                by 1-based index <idx>
+        :param idx: An integer, 1-based index of the PSU of which to query o/p power
+        :return: An integer, value of o/p power in micro Watts if PSU is good, else zero
+        """
+        return 0
+
+    def get_fan_speed(self, idx, fan_idx):
+        """
+        Retrieves the speed of fan, in rpm, denoted by 1-based <fan_idx> of a power 
+                supply unit (PSU) defined by 1-based index <idx>
+        :param idx: An integer, 1-based index of the PSU of which to query fan speed
+        :param fan_idx: An integer, 1-based index of the PSU-fan of which to query speed
+        :return: An integer, value of PSU-fan speed in rpm if PSU-fan is good, else zero
+        """
+        return 0