Documentation/ABI/testing/sysfs-devices-lpss_ltr

   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
  10 What:           /sys/devices/.../lpss_ltr/ltr_mode
  11 Date:           March 2013
  12 Contact:        Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  13 Description:
  14                 The /sys/devices/.../lpss_ltr/ltr_mode attribute contains an
  15                 integer number (0 or 1) indicating whether or not the devices'
  16                 LTR functionality is working in the software mode (1).
  17
  18                 This attribute is read-only.  If the device's runtime PM status
  19                 is not "active", attempts to read from this attribute cause
  20                 -EAGAIN to be returned.
  21
  22 What:           /sys/devices/.../lpss_ltr/auto_ltr
  23 Date:           March 2013
  24 Contact:        Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  25 Description:
  26                 The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the
  27                 current value of the device's AUTO_LTR register (raw)
  28                 represented as an 8-digit hexadecimal number.
  29
  30                 This attribute is read-only.  If the device's runtime PM status
  31                 is not "active", attempts to read from this attribute cause
  32                 -EAGAIN to be returned.
  33
  34 What:           /sys/devices/.../lpss_ltr/sw_ltr
  35 Date:           March 2013
  36 Contact:        Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  37 Description:
  38                 The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the
  39                 current value of the device's SW_LTR register (raw) represented
  40                 as an 8-digit hexadecimal number.
  41
  42                 This attribute is read-only.  If the device's runtime PM status
  43                 is not "active", attempts to read from this attribute cause
  44                 -EAGAIN to be returned.