Commit f48a0c47 authored by Lukasz Luba's avatar Lukasz Luba Committed by Viresh Kumar
Browse files

Documentation: EM: Describe new registration method using DT 



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 EM.

Signed-off-by: default avatarLukasz Luba <lukasz.luba@arm.com>
Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
parent 32bf8bc9

Documentation/power/energy-model.rst

+10 −0
Original line number Original line Diff line number Diff line
@@ -113,6 +113,16 @@ to: return warning/error, stop working or panic. 
See Section 3. for an example of driver implementing this

See Section 3. for an example of driver implementing this

callback, or Section 2.4 for further documentation on this API

callback, or Section 2.4 for further documentation on this API





Registration of EM using DT

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



The  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

Registration of 'simple' EM

~~~~~~~~~~~~~~~~~~~~~~~~~~~

~~~~~~~~~~~~~~~~~~~~~~~~~~~