75 lines
2.1 KiB
Python
75 lines
2.1 KiB
Python
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#
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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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def __init__(self):
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PsuBase.__init__(self)
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def get_cpld_register(self, reg_name):
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cpld_dir = "/sys/devices/platform/dell-s6000-cpld.0"
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retval = 'ERR'
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reg_file = cpld_dir +'/' + reg_name
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if (not os.path.isfile(reg_file)):
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return retval
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try:
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with open(reg_file, '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 ", reg_file, "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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S6000_MAX_PSUS = 2
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return S6000_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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psu_status = self.get_cpld_register('psu'+str(index - 1)+'_status')
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if (psu_status != 'ERR'):
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status = int(psu_status, 10)
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presence = self.get_psu_presence(index)
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return (status & presence)
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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_presence = self.get_cpld_register('psu'+str(index - 1)+'_prs')
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if (psu_presence != 'ERR'):
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status = int(psu_presence, 10)
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return status
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