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.
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