1. 15 11月, 2012 2 次提交
  2. 20 1月, 2012 1 次提交
  3. 02 10月, 2011 1 次提交
    • M
      PM / devfreq: Add basic governors · ce26c5bb
      MyungJoo Ham 提交于
      Four cpufreq-like governors are provided as examples.
      
      powersave: use the lowest frequency possible. The user (device) should
      set the polling_ms as 0 because polling is useless for this governor.
      
      performance: use the highest freqeuncy possible. The user (device)
      should set the polling_ms as 0 because polling is useless for this
      governor.
      
      userspace: use the user specified frequency stored at
      devfreq.user_set_freq. With sysfs support in the following patch, a user
      may set the value with the sysfs interface.
      
      simple_ondemand: simplified version of cpufreq's ondemand governor.
      
      When a user updates OPP entries (enable/disable/add), OPP framework
      automatically notifies devfreq to update operating frequency
      accordingly. Thus, devfreq users (device drivers) do not need to update
      devfreq manually with OPP entry updates or set polling_ms for powersave
      , performance, userspace, or any other "static" governors.
      
      Note that these are given only as basic examples for governors and any
      devices with devfreq may implement their own governors with the drivers
      and use them.
      Signed-off-by: NMyungJoo Ham <myungjoo.ham@samsung.com>
      Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
      Reviewed-by: NMike Turquette <mturquette@ti.com>
      Acked-by: NKevin Hilman <khilman@ti.com>
      Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      ce26c5bb