sysfs-class-devfreq 1.9 KB

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  1. What: /sys/class/devfreq/.../
  2. Date: September 2011
  3. Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
  4. Description:
  5. Provide a place in sysfs for the devfreq objects.
  6. This allows accessing various devfreq specific variables.
  7. The name of devfreq object denoted as ... is same as the
  8. name of device using devfreq.
  9. What: /sys/class/devfreq/.../governor
  10. Date: September 2011
  11. Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
  12. Description:
  13. The /sys/class/devfreq/.../governor shows the name of the
  14. governor used by the corresponding devfreq object.
  15. What: /sys/class/devfreq/.../cur_freq
  16. Date: September 2011
  17. Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
  18. Description:
  19. The /sys/class/devfreq/.../cur_freq shows the current
  20. frequency of the corresponding devfreq object.
  21. What: /sys/class/devfreq/.../central_polling
  22. Date: September 2011
  23. Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
  24. Description:
  25. The /sys/class/devfreq/.../central_polling shows whether
  26. the devfreq ojbect is using devfreq-provided central
  27. polling mechanism or not.
  28. What: /sys/class/devfreq/.../polling_interval
  29. Date: September 2011
  30. Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
  31. Description:
  32. The /sys/class/devfreq/.../polling_interval shows and sets
  33. the requested polling interval of the corresponding devfreq
  34. object. The values are represented in ms. If the value is
  35. less than 1 jiffy, it is considered to be 0, which means
  36. no polling. This value is meaningless if the governor is
  37. not polling; thus. If the governor is not using
  38. devfreq-provided central polling
  39. (/sys/class/devfreq/.../central_polling is 0), this value
  40. may be useless.
  41. What: /sys/class/devfreq/.../userspace/set_freq
  42. Date: September 2011
  43. Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
  44. Description:
  45. The /sys/class/devfreq/.../userspace/set_freq shows and
  46. sets the requested frequency for the devfreq object if
  47. userspace governor is in effect.