Documentation: ACPI: move lpit.txt to firmware-guide/acpi and convert to reST
This converts the plain text documentation to reStructuredText format and adds it to Sphinx TOC tree. No essential content change. Signed-off-by: Changbin Du <changbin.du@gmail.com> Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
parent
3e57460f00
commit
4887954cac
|
@ -22,3 +22,4 @@ ACPI Support
|
|||
gpio-properties
|
||||
i2c-muxes
|
||||
acpi-lid
|
||||
lpit
|
||||
|
|
|
@ -1,3 +1,9 @@
|
|||
.. SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
===========================
|
||||
Low Power Idle Table (LPIT)
|
||||
===========================
|
||||
|
||||
To enumerate platform Low Power Idle states, Intel platforms are using
|
||||
“Low Power Idle Table” (LPIT). More details about this table can be
|
||||
downloaded from:
|
||||
|
@ -8,13 +14,15 @@ Residencies for each low power state can be read via FFH
|
|||
|
||||
On platforms supporting S0ix sleep states, there can be two types of
|
||||
residencies:
|
||||
- CPU PKG C10 (Read via FFH interface)
|
||||
- Platform Controller Hub (PCH) SLP_S0 (Read via memory mapped interface)
|
||||
|
||||
- CPU PKG C10 (Read via FFH interface)
|
||||
- Platform Controller Hub (PCH) SLP_S0 (Read via memory mapped interface)
|
||||
|
||||
The following attributes are added dynamically to the cpuidle
|
||||
sysfs attribute group:
|
||||
/sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us
|
||||
/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us
|
||||
sysfs attribute group::
|
||||
|
||||
/sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us
|
||||
/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us
|
||||
|
||||
The "low_power_idle_cpu_residency_us" attribute shows time spent
|
||||
by the CPU package in PKG C10
|
Loading…
Reference in New Issue