sysfs-class-devfreq 2.3 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162
  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. Same as
  21. target_freq when get_cur_freq() is not implemented by
  22. devfreq driver.
  23. What: /sys/class/devfreq/.../target_freq
  24. Date: September 2012
  25. Contact: Rajagopal Venkat <rajagopal.venkat@linaro.org>
  26. Description:
  27. The /sys/class/devfreq/.../target_freq shows the next governor
  28. predicted target frequency of the corresponding devfreq object.
  29. What: /sys/class/devfreq/.../polling_interval
  30. Date: September 2011
  31. Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
  32. Description:
  33. The /sys/class/devfreq/.../polling_interval shows and sets
  34. the requested polling interval of the corresponding devfreq
  35. object. The values are represented in ms. If the value is
  36. less than 1 jiffy, it is considered to be 0, which means
  37. no polling. This value is meaningless if the governor is
  38. not polling; thus. If the governor is not using
  39. devfreq-provided central polling
  40. (/sys/class/devfreq/.../central_polling is 0), this value
  41. may be useless.
  42. What: /sys/class/devfreq/.../userspace/set_freq
  43. Date: September 2011
  44. Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
  45. Description:
  46. The /sys/class/devfreq/.../userspace/set_freq shows and
  47. sets the requested frequency for the devfreq object if
  48. userspace governor is in effect.
  49. What: /sys/class/devfreq/.../available_frequencies
  50. Date: October 2012
  51. Contact: Nishanth Menon <nm@ti.com>
  52. Description:
  53. The /sys/class/devfreq/.../available_frequencies shows
  54. the available frequencies of the corresponding devfreq object.
  55. This is a snapshot of available frequencies and not limited
  56. by the min/max frequency restrictions.