Commit 4887954c authored by Changbin Du's avatar Changbin Du Committed by Rafael J. Wysocki
Browse files

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: default avatarChangbin Du <changbin.du@gmail.com>
Reviewed-by: default avatarMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 3e57460f

Documentation/firmware-guide/acpi/index.rst

+1 −0
Original line number Diff line number Diff line
@@ -22,3 +22,4 @@ ACPI Support 
   gpio-properties

   i2c-muxes

   acpi-lid

   lpit

Documentation/acpi/lpit.txt→Documentation/firmware-guide/acpi/lpit.rst

+13 −5
Original line number Diff line number Diff line 
.. 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:
@@ -8,11 +14,13 @@ 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)



The following attributes are added dynamically to the cpuidle

sysfs attribute group:

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

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