75 lines
2.2 KiB
Python
75 lines
2.2 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 PSU 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_psu.psu_base import PsuBase
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except ImportError as e:
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raise ImportError (str(e) + "- required module not found")
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class PsuUtil(PsuBase):
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"""Platform-specific PSUutil class"""
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def __init__(self):
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PsuBase.__init__(self)
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self.psu_path = "/sys/class/psu/psu{}/"
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self.psu_presence = "psu_presence"
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self.psu_oper_status = "psu_status"
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def get_num_psus(self):
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"""
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Retrieves the number of PSUs available on the device
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:return: An integer, the number of PSUs available on the device
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"""
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return 2
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def get_psu_status(self, index):
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"""
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Retrieves the oprational status of power supply unit (PSU) defined
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by 1-based index <index>
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:param index: An integer, 1-based index of the PSU of which to query status
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:return: Boolean, True if PSU is operating properly, False if PSU is faulty
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"""
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if index is None:
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return False
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status = 0
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try:
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with open(self.psu_path.format(index) + self.psu_oper_status, 'r') as power_status:
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status = int(power_status.read())
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except IOError:
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return False
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return status == 0
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def get_psu_presence(self, index):
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"""
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Retrieves the presence status of power supply unit (PSU) defined
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by 1-based index <index>
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:param index: An integer, 1-based index of the PSU of which to query status
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:return: Boolean, True if PSU is plugged, False if not
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"""
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if index is None:
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return False
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status = 0
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try:
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with open(self.psu_path.format(index) + self.psu_presence, 'r') as presence_status:
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status = int(presence_status.read())
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except IOError:
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return False
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return status == 0
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