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      1 # Copyright (c) 2012 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 import errno, logging, os, shutil, time
      6 from autotest_lib.client.bin import test, utils
      7 from autotest_lib.client.cros import rtc, sys_power
      8 from autotest_lib.client.common_lib import error
      9 
     10 
     11 def read_rtc_wakeup(rtc_device):
     12     """
     13     Read the wakeup setting for for the RTC device.
     14     """
     15     sysfs_path = '/sys/class/rtc/%s/device/power/wakeup' % rtc_device
     16     return file(sysfs_path).read().strip()
     17 
     18 
     19 def read_rtc_wakeup_count(rtc_device):
     20     """
     21     Read the current wakeup count for the RTC device.
     22     """
     23     sysfs_path = '/sys/class/rtc/%s/device/power/wakeup_count' % rtc_device
     24     return int(file(sysfs_path).read())
     25 
     26 
     27 def fire_wakealarm(rtc_device):
     28     """
     29     Schedule a wakealarm and wait for it to fire.
     30     """
     31     rtc.set_wake_alarm('+1', rtc_device)
     32     time.sleep(2)
     33 
     34 
     35 class power_WakeupRTC(test.test):
     36     """Test RTC wake events."""
     37 
     38     version = 1
     39 
     40     def run_once(self):
     41         for rtc_device in rtc.get_rtc_devices():
     42             self.run_once_rtc(rtc_device)
     43 
     44     def run_once_rtc(self, rtc_device):
     45         logging.info('testing rtc device %s', rtc_device)
     46 
     47         # Test that RTC wakeup is enabled
     48         rtc_wakeup = read_rtc_wakeup(rtc_device)
     49         if rtc_wakeup != 'enabled':
     50             raise error.TestError('RTC wakeup is not enabled: %s' % rtc_device)
     51 
     52         # Test that RTC can generate wake events
     53         old_sys_wakeup_count = sys_power.read_wakeup_count()
     54         old_rtc_wakeup_count = read_rtc_wakeup_count(rtc_device)
     55         fire_wakealarm(rtc_device)
     56         new_sys_wakeup_count = sys_power.read_wakeup_count()
     57         new_rtc_wakeup_count = read_rtc_wakeup_count(rtc_device)
     58         if new_rtc_wakeup_count == old_rtc_wakeup_count:
     59             raise error.TestFail(
     60                     'RTC alarm should increase RTC wakeup_count: %s'
     61                     % rtc_device)
     62         if new_sys_wakeup_count == old_sys_wakeup_count:
     63             raise error.TestFail(
     64                     'RTC alarm should increase system wakeup_count: %s'
     65                     % rtc_device)
     66