1 What: /sys/devices/.../lpss_ltr/ 1 What: /sys/devices/.../lpss_ltr/
2 Date: March 2013 2 Date: March 2013
3 Contact: Rafael J. Wysocki <rafael.j.wys 3 Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
4 Description: 4 Description:
5 The /sys/devices/.../lpss_ltr/ 5 The /sys/devices/.../lpss_ltr/ directory is only present for
6 devices included into the Inte 6 devices included into the Intel Lynxpoint Low Power Subsystem
7 (LPSS). If present, it contai 7 (LPSS). If present, it contains attributes containing the LTR
8 mode and the values of LTR reg 8 mode and the values of LTR registers of the device.
9 9
10 What: /sys/devices/.../lpss_ltr/ltr_ 10 What: /sys/devices/.../lpss_ltr/ltr_mode
11 Date: March 2013 11 Date: March 2013
12 Contact: Rafael J. Wysocki <rafael.j.wys 12 Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
13 Description: 13 Description:
14 The /sys/devices/.../lpss_ltr/ 14 The /sys/devices/.../lpss_ltr/ltr_mode attribute contains an
15 integer number (0 or 1) indica 15 integer number (0 or 1) indicating whether or not the devices'
16 LTR functionality is working i 16 LTR functionality is working in the software mode (1).
17 17
18 This attribute is read-only. 18 This attribute is read-only. If the device's runtime PM status
19 is not "active", attempts to r 19 is not "active", attempts to read from this attribute cause
20 -EAGAIN to be returned. 20 -EAGAIN to be returned.
21 21
22 What: /sys/devices/.../lpss_ltr/auto 22 What: /sys/devices/.../lpss_ltr/auto_ltr
23 Date: March 2013 23 Date: March 2013
24 Contact: Rafael J. Wysocki <rafael.j.wys 24 Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
25 Description: 25 Description:
26 The /sys/devices/.../lpss_ltr/ 26 The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the
27 current value of the device's 27 current value of the device's AUTO_LTR register (raw)
28 represented as an 8-digit hexa 28 represented as an 8-digit hexadecimal number.
29 29
30 This attribute is read-only. 30 This attribute is read-only. If the device's runtime PM status
31 is not "active", attempts to r 31 is not "active", attempts to read from this attribute cause
32 -EAGAIN to be returned. 32 -EAGAIN to be returned.
33 33
34 What: /sys/devices/.../lpss_ltr/sw_l 34 What: /sys/devices/.../lpss_ltr/sw_ltr
35 Date: March 2013 35 Date: March 2013
36 Contact: Rafael J. Wysocki <rafael.j.wys 36 Contact: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
37 Description: 37 Description:
38 The /sys/devices/.../lpss_ltr/ 38 The /sys/devices/.../lpss_ltr/auto_ltr attribute contains the
39 current value of the device's 39 current value of the device's SW_LTR register (raw) represented
40 as an 8-digit hexadecimal numb 40 as an 8-digit hexadecimal number.
41 41
42 This attribute is read-only. 42 This attribute is read-only. If the device's runtime PM status
43 is not "active", attempts to r 43 is not "active", attempts to read from this attribute cause
44 -EAGAIN to be returned. 44 -EAGAIN to be returned.
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