58 lines
1.5 KiB
Python
58 lines
1.5 KiB
Python
import os.path
|
|
|
|
try:
|
|
from sonic_psu.psu_base import PsuBase
|
|
except ImportError as e:
|
|
raise ImportError (str(e) + "- required module not found")
|
|
|
|
class PsuUtil(PsuBase):
|
|
"""Platform-specific PSUutil class"""
|
|
|
|
def __init__(self):
|
|
PsuBase.__init__(self)
|
|
|
|
self.psu_path = "/sys/bus/i2c/devices/{}-0058/"
|
|
self.psu_oper_status = "in1_input"
|
|
self.psu_presence = "i2cget -y {} 0x50 0x00"
|
|
|
|
|
|
def get_num_psus(self):
|
|
"""
|
|
Retrieves the number of PSUs available on the device
|
|
|
|
:return: An integer, the number of PSUs available on the device
|
|
"""
|
|
return 2
|
|
|
|
def get_psu_status(self, index):
|
|
if index is None:
|
|
return False
|
|
Base_bus_number = 39
|
|
status = 0
|
|
#index from 1, psu attribute bus from 40
|
|
try:
|
|
with open(self.psu_path.format(index + Base_bus_number) + self.psu_oper_status, 'r') as power_status:
|
|
if int(power_status.read()) == 0 :
|
|
return False
|
|
else:
|
|
status = 1
|
|
except IOError:
|
|
return True
|
|
return status == 1
|
|
|
|
def get_psu_presence(self, index):
|
|
if index is None:
|
|
return False
|
|
Base_bus_number = 39
|
|
status = 0
|
|
try:
|
|
p = os.popen(self.psu_presence.format(index + Base_bus_number)+ "> /dev/null 2>&1")
|
|
if p.readline() != None:
|
|
status = 1
|
|
p.close()
|
|
except IOError:
|
|
return False
|
|
return status == 1
|
|
|
|
|