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| author | Lukasz Luba <lukasz.luba@arm.com> | 2022-03-02 11:29:17 +0000 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2022-03-03 09:35:04 +0530 |
| commit | f48a0c475c2aec8f2274703e1dc7be503f40f7cc (patch) | |
| tree | 1e4bed0aa2437b308457795447cc7a58d1c39d01 /Documentation/power | |
| parent | 32bf8bc9a077680566b2b4f88b9b46e6cc740179 (diff) | |
| download | linux-f48a0c475c2aec8f2274703e1dc7be503f40f7cc.tar.gz linux-f48a0c475c2aec8f2274703e1dc7be503f40f7cc.tar.bz2 linux-f48a0c475c2aec8f2274703e1dc7be503f40f7cc.zip | |
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: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'Documentation/power')
| -rw-r--r-- | Documentation/power/energy-model.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/power/energy-model.rst b/Documentation/power/energy-model.rst index 5ac62a7b4b7c..49549aab41b4 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 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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~ |