| 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. |
