93 lines
2.5 KiB
Python
93 lines
2.5 KiB
Python
#
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# psuutil.py
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# Platform-specific PSU status interface for SONiC
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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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SYSFS_PSU_DIR = ["/sys/bus/i2c/devices/i2c-18/18-0050",
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"/sys/bus/i2c/devices/i2c-17/17-0050"]
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def __init__(self):
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PsuBase.__init__(self)
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# Get sysfs attribute
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def get_attr_value(self, attr_path):
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retval = 'ERR'
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if (not os.path.isfile(attr_path)):
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return retval
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try:
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with open(attr_path, 'r') as fd:
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retval = fd.read()
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except Exception as error:
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logging.error("Unable to open ", attr_path, " file !")
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retval = retval.rstrip('\r\n')
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return retval
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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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MAX_PSUS = 2
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return MAX_PSUS
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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 index <index>
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:param index: An integer, 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\
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faulty
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"""
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status = 0
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attr_file = 'psu_pg'
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attr_path = self.SYSFS_PSU_DIR[index-1] +'/' + attr_file
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attr_value = self.get_attr_value(attr_path)
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if (attr_value != 'ERR'):
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attr_value = int(attr_value, 16)
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# Check for PSU status
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if (attr_value == 1):
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status = 1
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return status
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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 index <index>
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:param index: An integer, 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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status = 0
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psu_absent = 0
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attr_file ='psu_abs'
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attr_path = self.SYSFS_PSU_DIR[index-1] +'/' + attr_file
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attr_value = self.get_attr_value(attr_path)
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if (attr_value != 'ERR'):
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attr_value = int(attr_value, 16)
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# Check for PSU presence
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if (attr_value == 0):
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status = 1
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return status
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