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1What: /sys/devices/.../lpss_ltr/2Date: March 20133Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>4Description:5 The /sys/devices/.../lpss_ltr/ directory is only present for6 devices included into the Intel Lynxpoint Low Power Subsystem7 (LPSS). If present, it contains attributes containing the LTR8 mode and the values of LTR registers of the device.9 10What: /sys/devices/.../lpss_ltr/ltr_mode11Date: March 201312Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>13Description:14 The /sys/devices/.../lpss_ltr/ltr_mode attribute contains an15 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 status19 is not "active", attempts to read from this attribute cause20 -EAGAIN to be returned.21 22What: /sys/devices/.../lpss_ltr/auto_ltr23Date: March 201324Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>25Description:26 The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the27 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 status31 is not "active", attempts to read from this attribute cause32 -EAGAIN to be returned.33 34What: /sys/devices/.../lpss_ltr/sw_ltr35Date: March 201336Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>37Description:38 The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the39 current value of the device's SW_LTR register (raw) represented40 as an 8-digit hexadecimal number.41 42 This attribute is read-only. If the device's runtime PM status43 is not "active", attempts to read from this attribute cause44 -EAGAIN to be returned.45