Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux/fpc-iii.git] / Documentation / ABI / testing / sysfs-devices-lpss_ltr
blobea9298d9bbaf3349af243a410a16898ecde5c1c0
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.
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).
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.
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.
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.
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.
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.