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3 Commits

Author SHA1 Message Date
Lukasz Luba
27d2c37e7d powercap/dtpm_devfreq: Use new Energy Model interface to get table 
Energy Model framework support modifications at runtime of the power
values. Use the new EM table API which is protected with RCU. Align the
code so that this RCU read section is short.

This change is not expected to alter the general functionality.

Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2024-02-08 15:00:31 +01:00
Lukasz Luba
b817f1488f powercap: DTPM: Fix unneeded conversions to micro-Watts 
The power values coming from the Energy Model are already in uW.

The PowerCap and DTPM frameworks operate on uW, so all places should
just use the values from the EM.

Fix the code by removing all of the conversion to uW still present in it.

Fixes: ae6ccaa650 (PM: EM: convert power field to micro-Watts precision and align drivers)
Cc: 5.19+ <stable@vger.kernel.org> # v5.19+
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 2023-11-28 15:15:14 +01:00
Daniel Lezcano
e446556173 powercap/drivers/dtpm: Add dtpm devfreq with energy model support 
Currently the dtpm supports the CPUs via cpufreq and the energy
model. This change provides the same for the device which supports
devfreq.

Each device supporting devfreq and having an energy model can be added
to the hierarchy.

The concept is the same as the cpufreq DTPM support: the QoS is used
to aggregate the requests and the energy model gives the value of the
instantaneous power consumption ponderated by the load of the device.

Cc: Chanwoo Choi <cwchoi00@gmail.com>
Cc: Lukasz Luba <lukasz.luba@arm.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20220128163537.212248-5-daniel.lezcano@linaro.org
 2022-02-04 17:38:09 +01:00