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#
# Copyright 2017-2019 Ettus Research, A National Instruments Company
#
# SPDX-License-Identifier: GPL-3.0-or-later
"""
sysfs thermal sensors API
"""
import pyudev
def read_sysfs_sensors_value(sensor_type, data_probe, subsystem, attribute):
"""
This function will return a list of all the float value of
the sysfs thermal sensor subsystems and attribute
Arguments:
sensor_type -- Is "attribute" of udev. This can be fpga-thermal-zone,
magnesium-db0-zone, croc-ec-thermal etc.
data_probe -- is one of the attribute of that sensor. This can be 'temp' in
the case of thermal-zone or 'cur_state' in the case of a
cooling device.
subsystem -- of the thermal sensor
attribute -- matching attribute for the sensor e.g. 'type', 'name'
"""
reading_sensors = [float(x.attributes.asstring(data_probe)) for x in pyudev.Context()
.list_devices(subsystem=subsystem)
.match_attribute(attribute, sensor_type)]
return reading_sensors
def read_thermal_sensors_value(sensor_type, data_probe, subsystem='thermal', attribute='type'):
"""
This function will return a list of all the float value of
the thermal sensor subsystem = 'thermal' and type = sensor_type
Arguments:
sensor_type -- Is attribute "type" of udev. This can be fpga-thermal-zone,
magnesium-db0-zone, croc-ec-thermal etc.
data_probe -- is one of the attribute of that sensor. This can be 'temp' in
the case of thermal-zone or 'cur_state' in the case of a
cooling device.
"""
return read_sysfs_sensors_value(sensor_type, data_probe, subsystem, attribute)
def read_thermal_sensor_value(sensor_type, data_probe, subsystem='thermal', attribute='type'):
"""
This function will return the float value of the thermal sensor
which is under thermal subsystem.
Arguments:
sensor_type -- Is attribute "type" of udev. This can be fpga-thermal-zone,
magnesium-db0-zone, etc.
data_probe -- is one of the attribute of that sensor. This can be 'temp' in
the case of thermal-zone or 'cur_state' in the case of a
cooling device.
"""
sensor_val = read_thermal_sensors_value(sensor_type, data_probe, subsystem, attribute)
if not sensor_val:
raise IndexError("No {} attribute found for {} sensor.".format(data_probe, sensor_type))
return sensor_val[0]
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