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The dynamic thermal and power management is a technique to dynamically
adjust the power consumption of different devices in order to ensure a
global thermal constraint.
An userspace daemon is usually monitoring the temperature and the
power to take immediate action on the device.
The DTPM framework provides an unified API to userspace to act on the
power.
Document this framework.
Signed-off-by: Daniel Lezcano <[email protected]>
Reviewed-by: Lukasz Luba <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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Modern Intel Mobile platforms support power limit4 (PL4), which is
the SoC package level maximum power limit (in Watts). It can be used
to preemptively limits potential SoC power to prevent power spikes
from tripping the power adapter and battery over-current protection.
This patch enables this feature by exposing package level peak power
capping control to userspace via RAPL sysfs interface. With this,
application like DTPF can modify PL4 power limit, the similar way
of other package power limit (PL1).
As this feature is not tested on previous generations, here it is
enabled only for the platform that has been verified to work,
for safety concerns.
Signed-off-by: Sumeet Pawnikar <[email protected]>
Co-developed-by: Zhang Rui <[email protected]>
Signed-off-by: Zhang Rui <[email protected]>
Reviewed-by: Srinivas Pandruvada <[email protected]>
Tested-by: Srinivas Pandruvada <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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Convert the PM documents to ReST, in order to allow them to
build with Sphinx.
The conversion is actually:
- add blank lines and indentation in order to identify paragraphs;
- fix tables markups;
- add some lists markups;
- mark literal blocks;
- adjust title markups.
At its new index.rst, let's add a :orphan: while this is not linked to
the main index.rst file, in order to avoid build warnings.
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Acked-by: Mark Brown <[email protected]>
Acked-by: Srivatsa S. Bhat (VMware) <[email protected]>
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Added power cap framework documentation. This explains the use of power
capping framework, sysfs and programming interface.
There are two documents:
- Documentation/power/powercap/powercap.txt : Explains use case and APIs.
- Documentation/ABI/testing/sysfs-class-powercap: Explains ABIs.
Signed-off-by: Srinivas Pandruvada <[email protected]>
Signed-off-by: Jacob Pan <[email protected]>
Signed-off-by: Arjan van de Ven <[email protected]>
Reviewed-by: Rafael J. Wysocki <[email protected]>
Reviewed-by: Len Brown <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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