mirror of
https://github.com/ARM-software/workload-automation.git
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78 lines
2.8 KiB
Python
78 lines
2.8 KiB
Python
# Copyright 2013-2015 ARM Limited
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from wlauto.exceptions import DeviceError
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HWMON_ROOT = '/sys/class/hwmon'
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class HwmonSensor(object):
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def __init__(self, device, kind, label, filepath):
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self.device = device
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self.kind = kind
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self.label = label
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self.filepath = filepath
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self.readings = []
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def take_reading(self):
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reading = self.device.get_sysfile_value(self.filepath, int)
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self.readings.append(reading)
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def clear_readings(self):
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self.readings = []
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def discover_sensors(device, sensor_kinds):
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"""
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Discovers HWMON sensors available on the device.
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:device: Device on which to discover HWMON sensors. Must be an instance
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of :class:`AndroidDevice`.
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:sensor_kinds: A list of names of sensor types to be discovered. The names
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must be as they appear prefixed to ``*_input`` files in
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sysfs. E.g. ``'energy'``.
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:returns: A list of :class:`HwmonSensor` instantces for each found sensor. If
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no sensors of the specified types were discovered, an empty list
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will be returned.
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"""
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hwmon_devices = device.list_directory(HWMON_ROOT)
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path = device.path
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sensors = []
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for hwmon_device in hwmon_devices:
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try:
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device_path = path.join(HWMON_ROOT, hwmon_device, 'device')
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name = device.get_sysfile_value(path.join(device_path, 'name'))
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except DeviceError: # probably a virtual device
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device_path = path.join(HWMON_ROOT, hwmon_device)
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name = device.get_sysfile_value(path.join(device_path, 'name'))
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for sensor_kind in sensor_kinds:
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i = 1
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input_path = path.join(device_path, '{}{}_input'.format(sensor_kind, i))
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while device.file_exists(input_path):
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label_path = path.join(device_path, '{}{}_label'.format(sensor_kind, i))
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if device.file_exists(label_path):
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name += ' ' + device.get_sysfile_value(label_path)
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sensors.append(HwmonSensor(device, sensor_kind, name, input_path))
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i += 1
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input_path = path.join(device_path, '{}{}_input'.format(sensor_kind, i))
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return sensors
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