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    • D
      cpufreq/x86: Add P-state driver for sandy bridge. · 93f0822d
      Dirk Brandewie 提交于
      Add a P-state driver for the Intel Sandy bridge processor. In cpufreq
      terminology this driver implements a  scaling driver with an internal
      governor.
      
      When built into the the kernel this driver will be the preferred
      scaling driver for Sandy bridge processors.
      
      In addition to the interfaces provided by the cpufreq subsystem for
      controlling scaling drivers. The user may control the behavior of the
      driver via three sysfs files located in
      "/sys/devices/system/cpu/intel_pstate".
      
        max_perf_pct: limits the maximum P state that will be requested by
        the driver stated as a percentage of the avail performance.
      
        min_perf_pct: limits the minimum P state that will be  requested by
        the driver stated as a percentage of the avail performance.
      
        no_turbo: limits the driver to selecting P states below the turbo
        frequency range.
      Signed-off-by: NDirk Brandewie <dirk.j.brandewie@intel.com>
      Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
      Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
      93f0822d