| Rafael J. Wysocki | 2e0f882 | 2013-03-06 23:46:28 +0100 | [diff] [blame] | 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. |