75 lines
2.3 KiB
Python
75 lines
2.3 KiB
Python
#!/usr/bin/env python
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#############################################################################
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# Mellanox
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#
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# Module contains an implementation of SONiC Platform Base API and
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# provides the PSUs status which are available in the platform
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#
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#############################################################################
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import os.path
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try:
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from sonic_platform_base.psu_base import PsuBase
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from sonic_platform.fan import Fan
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except ImportError as e:
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raise ImportError (str(e) + "- required module not found")
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psu_list = []
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class Psu(PsuBase):
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"""Platform-specific Psu class"""
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def __init__(self, psu_index):
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global psu_list
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PsuBase.__init__(self)
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# PSU is 1-based on Mellanox platform
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self.index = psu_index + 1
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psu_list.append(self.index)
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self.psu_path = "/var/run/hw-management/thermal/"
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self.psu_oper_status = "psu{}_pwr_status".format(self.index)
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self.psu_presence = "psu{}_status".format(self.index)
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if os.path.exists(os.path.join(self.psu_path, self.psu_presence)):
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self.presence_file_exists = True
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else:
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self.presence_file_exists = False
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fan = Fan(psu_index, psu_index, True)
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if fan.get_presence():
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self._fan = fan
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def get_status(self):
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"""
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Retrieves the operational status of power supply unit (PSU) defined
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Returns:
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bool: True if PSU is operating properly, False if not
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"""
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status = 0
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try:
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with open(os.path.join(self.psu_path, self.psu_oper_status), 'r') as power_status:
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status = int(power_status.read())
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except (ValueError, IOError):
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status = 0
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return status == 1
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def get_presence(self):
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"""
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Retrieves the presence status of power supply unit (PSU) defined
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Returns:
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bool: True if PSU is present, False if not
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"""
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status = 0
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if self.presence_file_exists:
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try:
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with open(os.path.join(self.psu_path, self.psu_presence), 'r') as presence_status:
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status = int(presence_status.read())
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except (ValueError, IOError):
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status = 0
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else:
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status = self.index in psu_list
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return status == 1
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