sysfs-devices-lpss_ltr 1.7 KB

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  1. What: /sys/devices/.../lpss_ltr/
  2. Date: March 2013
  3. Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  4. Description:
  5. The /sys/devices/.../lpss_ltr/ directory is only present for
  6. devices included into the Intel Lynxpoint Low Power Subsystem
  7. (LPSS). If present, it contains attributes containing the LTR
  8. mode and the values of LTR registers of the device.
  9. What: /sys/devices/.../lpss_ltr/ltr_mode
  10. Date: March 2013
  11. Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  12. Description:
  13. The /sys/devices/.../lpss_ltr/ltr_mode attribute contains an
  14. integer number (0 or 1) indicating whether or not the devices'
  15. LTR functionality is working in the software mode (1).
  16. This attribute is read-only. If the device's runtime PM status
  17. is not "active", attempts to read from this attribute cause
  18. -EAGAIN to be returned.
  19. What: /sys/devices/.../lpss_ltr/auto_ltr
  20. Date: March 2013
  21. Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  22. Description:
  23. The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the
  24. current value of the device's AUTO_LTR register (raw)
  25. represented as an 8-digit hexadecimal number.
  26. This attribute is read-only. If the device's runtime PM status
  27. is not "active", attempts to read from this attribute cause
  28. -EAGAIN to be returned.
  29. What: /sys/devices/.../lpss_ltr/sw_ltr
  30. Date: March 2013
  31. Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  32. Description:
  33. The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the
  34. current value of the device's SW_LTR register (raw) represented
  35. as an 8-digit hexadecimal number.
  36. This attribute is read-only. If the device's runtime PM status
  37. is not "active", attempts to read from this attribute cause
  38. -EAGAIN to be returned.