1 # Copyright (c) 2011 The Chromium OS Authors. All rights reserved. 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 5 6 # DESCRIPTION : 7 # 8 # Hardware test for temp sensor. The test uses mosys to read temp sensor value 9 # and check it's in reasonable range. 10 11 12 import re 13 14 from autotest_lib.client.bin import test, utils 15 from autotest_lib.client.common_lib import error 16 17 18 # Reasonable temp range for different temp units. 19 TEMP_RANGE = { 20 'degrees C': (0, 100), 21 } 22 23 24 class TempSensor(object): 25 MOSYS_OUTPUT_RE = re.compile('(\w+)="(.*?)"') 26 27 def __init__(self, name): 28 self._name = name 29 30 def get_values(self): 31 values = {} 32 cmd = 'mosys -k sensor print thermal %s' % self._name 33 for kv in self.MOSYS_OUTPUT_RE.finditer(utils.system_output(cmd)): 34 key, value = kv.groups() 35 if key == 'reading': 36 value = int(value) 37 values[key] = value 38 return values 39 40 def get_units(self): 41 return self.get_values()['units'] 42 43 def get_reading(self): 44 return self.get_values()['reading'] 45 46 47 class hardware_Thermal(test.test): 48 version = 1 49 50 def run_once(self, temp_sensor_names=['temp0']): 51 if not temp_sensor_names: 52 raise error.TestError('No temp sensor specified') 53 54 for name in temp_sensor_names: 55 ts = TempSensor(name) 56 units = ts.get_units() 57 try: 58 low, high = TEMP_RANGE[units] 59 except KeyError: 60 raise error.TestError('Unknown temp units of %s' % name) 61 if not low <= ts.get_reading() <= high: 62 raise error.TestError('Temperature of %s out of range' % name) 63
