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Support PSU voltage high/low thresholds and power max threshold (#8983)

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- Why I did it
Support PSU voltage high/low thresholds and power max threshold
1. Add thresholds support for voltage and power.
2. As thresholds are not supported on all platforms, we need to check the capability first and fetch thresholds only if it is supported.

- How I did it

- How to verify it
Run regression test and manual test.

Signed-off-by: Stephen Sun <stephens@nvidia.com>
This commit is contained in:
Stephen Sun 2021-11-22 18:41:16 +08:00 committed by GitHub
parent 14fb629ab6
commit f9d0921d09
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1 changed files with 64 additions and 6 deletions
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70
platform/mellanox/mlnx-platform-api/sonic_platform/psu.py
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@ -192,24 +192,28 @@ class FixedPsu(PsuBase):
class Psu(FixedPsu):
"""Platform-specific Psu class"""
PSU_CURRENT = "power/psu{}_curr"
PSU_VOLTAGE = "power/psu{}_volt"
PSU_VOLTAGE1 = "power/psu{}_volt_out2"
PSU_POWER = "power/psu{}_power"
PSU_VPD = "eeprom/psu{}_vpd"
shared_led = None
def __init__(self, psu_index):
super(Psu, self).__init__(psu_index)
psu_voltage = os.path.join(PSU_PATH, self.PSU_VOLTAGE1.format(self.index))
psu_voltage_out2 = os.path.join(PSU_PATH, "power/psu{}_volt_out2".format(self.index))
psu_voltage = os.path.join(PSU_PATH, "power/psu{}_volt".format(self.index))
# Workaround for psu voltage sysfs file as the file name differs among platforms
if os.path.exists(psu_voltage):
self.psu_voltage = os.path.join(PSU_PATH, self.PSU_VOLTAGE1.format(self.index))
if os.path.exists(psu_voltage_out2):
self.psu_voltage = psu_voltage_out2
else:
self.psu_voltage = os.path.join(PSU_PATH, self.PSU_VOLTAGE.format(self.index))
self.psu_voltage = psu_voltage
self.psu_voltage_min = self.psu_voltage + "_min"
self.psu_voltage_max = self.psu_voltage + "_max"
self.psu_voltage_capability = self.psu_voltage + "_capability"
self.psu_current = os.path.join(PSU_PATH, self.PSU_CURRENT.format(self.index))
self.psu_power = os.path.join(PSU_PATH, self.PSU_POWER.format(self.index))
self.psu_power_max = self.psu_power + "_max"
self.psu_presence = os.path.join(PSU_PATH, "thermal/psu{}_status".format(self.index))
self.psu_temp = os.path.join(PSU_PATH, 'thermal/psu{}_temp'.format(self.index))
@ -355,3 +359,57 @@ class Psu(FixedPsu):
return float(temp_threshold) / 1000
return None
def get_voltage_high_threshold(self):
"""
Retrieves the high threshold PSU voltage output
Returns:
A float number, the high threshold output voltage in volts,
e.g. 12.1
Notes:
The thresholds of voltage are not supported on all platforms.
So we have to check capability first.
"""
if self.psu_voltage_capability and self.psu_voltage_max and self.get_powergood_status():
capability = utils.read_str_from_file(self.psu_voltage_capability)
if 'max' in capability:
max_voltage = utils.read_int_from_file(self.psu_voltage_max, log_func=logger.log_info)
return float(max_voltage) / 1000
return None
def get_voltage_low_threshold(self):
"""
Retrieves the low threshold PSU voltage output
Returns:
A float number, the low threshold output voltage in volts,
e.g. 12.1
Notes:
The thresholds of voltage are not supported on all platforms.
So we have to check capability first.
"""
if self.psu_voltage_capability and self.psu_voltage_min and self.get_powergood_status():
capability = utils.read_str_from_file(self.psu_voltage_capability)
if 'min' in capability:
min_voltage = utils.read_int_from_file(self.psu_voltage_min, log_func=logger.log_info)
return float(min_voltage) / 1000
return None
def get_maximum_supplied_power(self):
"""
Retrieves the maximum supplied power by PSU
Returns:
A float number, the maximum power output in Watts.
e.g. 1200.1
"""
if self.psu_power_max and self.get_powergood_status():
power_max = utils.read_int_from_file(self.psu_power_max, log_func=logger.log_info)
return float(power_max) / 1000000
else:
return None