63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
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#!/usr/bin/env python
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#############################################################################
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# Centec
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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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from subprocess import Popen, PIPE, STDOUT
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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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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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cmd = 'i2cget -y 0 0x36 0x1e'
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status = int(Popen(cmd, stdout=PIPE, stderr=STDOUT, shell=True).stdout.readline(), 16)
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powergood = ((status & (1 << (3 * (index - 1) + 2))) != 0)
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return powergood
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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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cmd = 'i2cget -y 0 0x36 0x1e'
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status = int(Popen(cmd, stdout=PIPE, stderr=STDOUT, shell=True).stdout.readline(), 16)
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presence = ((status & (1 << (3 * (index - 1) + 1))) == 0)
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return presence
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