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| author | Sudeep Holla <Sudeep.Holla@arm.com> | 2016-07-21 17:18:07 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-07-21 23:25:58 +0200 |
| commit | a36a7fecfe6071732075ad5aa31196adce13181b (patch) | |
| tree | e3d88c1b278e013b10bd1280dc0257d5b23cba3c /arch/arm64 | |
| parent | 35ae713355868aa493edbfbabf615473473215cc (diff) | |
| download | linux-a36a7fecfe6071732075ad5aa31196adce13181b.tar.bz2 | |
ACPI / processor_idle: Add support for Low Power Idle(LPI) states
ACPI 6.0 introduced an optional object _LPI that provides an alternate
method to describe Low Power Idle states. It defines the local power
states for each node in a hierarchical processor topology. The OSPM can
use _LPI object to select a local power state for each level of processor
hierarchy in the system. They used to produce a composite power state
request that is presented to the platform by the OSPM.
Since multiple processors affect the idle state for any non-leaf hierarchy
node, coordination of idle state requests between the processors is
required. ACPI supports two different coordination schemes: Platform
coordinated and OS initiated.
This patch adds initial support for Platform coordination scheme of LPI.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/arm64')
0 files changed, 0 insertions, 0 deletions