[PATCH v3 4/4] Documentation: EM: Describe new registration method using DT
From: Lukasz Luba <lukasz.luba@arm.com>
Date: 2022-02-24 08:13:18
Also in:
linux-pm, lkml
Subsystem:
energy model, suspend to ram, the rest · Maintainers:
Lukasz Luba, "Rafael J. Wysocki", Linus Torvalds
The new registration method allows to get power values from the DT OPP definition. The new OPP entry property "opp-microwatt" contains total power expressed in micro-Watts. Align the EM documentation with this new possible registration method of 'advanced' EM. Signed-off-by: Lukasz Luba <lukasz.luba@arm.com> --- Documentation/power/energy-model.rst | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/Documentation/power/energy-model.rst b/Documentation/power/energy-model.rst
index 5ac62a7b4b7c..719253fd5215 100644
--- a/Documentation/power/energy-model.rst
+++ b/Documentation/power/energy-model.rst@@ -113,6 +113,16 @@ to: return warning/error, stop working or panic. See Section 3. for an example of driver implementing this callback, or Section 2.4 for further documentation on this API +Registration of 'advanced' EM using DT +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The 'advanced' EM can also be registered using OPP framework and information +in DT "operating-points-v2". Each OPP entry in DT can be extended with a +property "opp-microwatt" containing micro-Watts power value. This OPP DT +property allows a platform to register EM power values which are reflecting +total power (static + dynamic). These power values might be coming directly +from experiments and measurements. + Registration of 'simple' EM ~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
2.17.1