| What: /sys/devices/.../lpss_ltr/ | |
| Date: March 2013 | |
| Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
| Description: | |
| The /sys/devices/.../lpss_ltr/ directory is only present for | |
| devices included into the Intel Lynxpoint Low Power Subsystem | |
| (LPSS). If present, it contains attributes containing the LTR | |
| mode and the values of LTR registers of the device. | |
| What: /sys/devices/.../lpss_ltr/ltr_mode | |
| Date: March 2013 | |
| Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
| Description: | |
| The /sys/devices/.../lpss_ltr/ltr_mode attribute contains an | |
| integer number (0 or 1) indicating whether or not the devices' | |
| LTR functionality is working in the software mode (1). | |
| This attribute is read-only. If the device's runtime PM status | |
| is not "active", attempts to read from this attribute cause | |
| -EAGAIN to be returned. | |
| What: /sys/devices/.../lpss_ltr/auto_ltr | |
| Date: March 2013 | |
| Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
| Description: | |
| The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the | |
| current value of the device's AUTO_LTR register (raw) | |
| represented as an 8-digit hexadecimal number. | |
| This attribute is read-only. If the device's runtime PM status | |
| is not "active", attempts to read from this attribute cause | |
| -EAGAIN to be returned. | |
| What: /sys/devices/.../lpss_ltr/sw_ltr | |
| Date: March 2013 | |
| Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
| Description: | |
| The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the | |
| current value of the device's SW_LTR register (raw) represented | |
| as an 8-digit hexadecimal number. | |
| This attribute is read-only. If the device's runtime PM status | |
| is not "active", attempts to read from this attribute cause | |
| -EAGAIN to be returned. |