5356244e53
- Why I did it Add NVIDIA Copyright header to "mellanox" files - How I did it Add NVIDIA Copyright header as a comment for Mellanox files - How to verify it Sanity tests and PR checkers.
80 lines
2.5 KiB
Python
80 lines
2.5 KiB
Python
#
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# Copyright (c) 2017-2021 NVIDIA CORPORATION & AFFILIATES.
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# Apache-2.0
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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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 = "/var/run/hw-management/thermal/"
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self.psu_presence = "psu{}_status"
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self.psu_oper_status = "psu{}_pwr_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 + self.psu_oper_status.format(index), '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 == 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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return isinstance(index, int) and index > 0 and index <= self.get_num_psus()
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