79 lines
2.2 KiB
Python
79 lines
2.2 KiB
Python
#
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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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import os.path
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import subprocess
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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_presence = "cat /sys/devices/platform/delta-ag9064-cpld.0/psu{}_scan"
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self.psu_status = "cat /sys/devices/platform/delta-ag9064-swpld1.0/psu{}_pwr_ok"
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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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p = os.popen(self.psu_status.format(index))
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content = p.readline().rstrip()
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reg_value = int(content)
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if reg_value != 0:
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return False
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status = 1
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p.close()
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except IOError:
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return False
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return status == 1
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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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p = os.popen(self.psu_presence.format(index))
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content = p.readline().rstrip()
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reg_value = int(content, 16)
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if reg_value != 0:
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return False
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status = 1
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p.close()
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except IOError:
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return False
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return status == 1
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