1. 19 5月, 2012 1 次提交
  2. 06 5月, 2012 1 次提交
  3. 02 5月, 2012 4 次提交
    • R
      PM / Sleep: Add user space interface for manipulating wakeup sources, v3 · b86ff982
      Rafael J. Wysocki 提交于
      Android allows user space to manipulate wakelocks using two
      sysfs file located in /sys/power/, wake_lock and wake_unlock.
      Writing a wakelock name and optionally a timeout to the wake_lock
      file causes the wakelock whose name was written to be acquired (it
      is created before is necessary), optionally with the given timeout.
      Writing the name of a wakelock to wake_unlock causes that wakelock
      to be released.
      
      Implement an analogous interface for user space using wakeup sources.
      Add the /sys/power/wake_lock and /sys/power/wake_unlock files
      allowing user space to create, activate and deactivate wakeup
      sources, such that writing a name and optionally a timeout to
      wake_lock causes the wakeup source of that name to be activated,
      optionally with the given timeout.  If that wakeup source doesn't
      exist, it will be created and then activated.  Writing a name to
      wake_unlock causes the wakeup source of that name, if there is one,
      to be deactivated.  Wakeup sources created with the help of
      wake_lock that haven't been used for more than 5 minutes are garbage
      collected and destroyed.  Moreover, there can be only WL_NUMBER_LIMIT
      wakeup sources created with the help of wake_lock present at a time.
      
      The data type used to track wakeup sources created by user space is
      called "struct wakelock" to indicate the origins of this feature.
      
      This version of the patch includes an rbtree manipulation fix from John Stultz.
      Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      Reviewed-by: NNeilBrown <neilb@suse.de>
      b86ff982
    • R
      PM / Sleep: Add "prevent autosleep time" statistics to wakeup sources · 55850945
      Rafael J. Wysocki 提交于
      Android uses one wakelock statistics that is only necessary for
      opportunistic sleep.  Namely, the prevent_suspend_time field
      accumulates the total time the given wakelock has been locked
      while "automatic suspend" was enabled.  Add an analogous field,
      prevent_sleep_time, to wakeup sources and make it behave in a similar
      way.
      Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      55850945
    • R
      PM / Sleep: Implement opportunistic sleep, v2 · 7483b4a4
      Rafael J. Wysocki 提交于
      Introduce a mechanism by which the kernel can trigger global
      transitions to a sleep state chosen by user space if there are no
      active wakeup sources.
      
      It consists of a new sysfs attribute, /sys/power/autosleep, that
      can be written one of the strings returned by reads from
      /sys/power/state, an ordered workqueue and a work item carrying out
      the "suspend" operations.  If a string representing the system's
      sleep state is written to /sys/power/autosleep, the work item
      triggering transitions to that state is queued up and it requeues
      itself after every execution until user space writes "off" to
      /sys/power/autosleep.
      
      That work item enables the detection of wakeup events using the
      functions already defined in drivers/base/power/wakeup.c (with one
      small modification) and calls either pm_suspend(), or hibernate() to
      put the system into a sleep state.  If a wakeup event is reported
      while the transition is in progress, it will abort the transition and
      the "system suspend" work item will be queued up again.
      Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      Reviewed-by: NNeilBrown <neilb@suse.de>
      7483b4a4
    • R
      PM / Sleep: Change wakeup source statistics to follow Android · 30e3ce6d
      Rafael J. Wysocki 提交于
      Wakeup statistics used by Android are slightly different from what we
      have in wakeup sources at the moment and there aren't any known
      users of those statistics other than Android, so modify them to make
      it easier for Android to switch to wakeup sources.
      
      This removes the struct wakeup_source's hit_cout field, which is very
      rough and therefore not very useful, and adds two new fields,
      wakeup_count and expire_count.  The first one tracks how many times
      the wakeup source is activated with events_check_enabled set (which
      roughly corresponds to the situations when a system power transition
      to a sleep state is in progress and would be aborted by this wakeup
      source if it were the only active one at that time) and the second
      one is the number of times the wakeup source has been activated with
      a timeout that expired.
      
      Additionally, the last_time field is now updated when the wakeup
      source is deactivated too (previously it was only updated during
      the wakeup source's activation), which seems to be what Android does
      with the analogous counter for wakelocks.
      Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      30e3ce6d
  4. 30 4月, 2012 1 次提交
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  17. 31 3月, 2012 8 次提交
  18. 30 3月, 2012 6 次提交