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