Introduce 'advanced' Energy Model in DT [LWN.net]

From:		Lukasz Luba <lukasz.luba-AT-arm.com>
To:		linux-kernel-AT-vger.kernel.org
Subject:		[RFC][PATCH 0/2] Introduce 'advanced' Energy Model in DT
Date:		Mon, 21 Feb 2022 22:51:29 +0000
Message-ID:		<20220221225131.15836-1-lukasz.luba@arm.com>
Cc:		lukasz.luba-AT-arm.com, dietmar.eggemann-AT-arm.com, viresh.kumar-AT-linaro.org, rafael-AT-kernel.org, daniel.lezcano-AT-linaro.org, nm-AT-ti.com, sboyd-AT-kernel.org, mka-AT-chromium.org, dianders-AT-chromium.org, robh+dt-AT-kernel.org, devicetree-AT-vger.kernel.org, linux-pm-AT-vger.kernel.org
Archive-link:		Article

Hi all,

This patch set solves a few issues:
1. It allows to register EM from DT, when the voltage information is not
   available. (Some background of the issues present on Chromebook devices
   can be checked at [1].)
2. It allows to register 'advanced' EM from the DT, which is more accurate
   and reflects total power (dynamic + static).

Implementation details:
It adds a new callback in OPP framework to parse the "energy-model" DT
entry. The propsed DT bindings heavily draw on "operating-points" (v1)
schema.

Comments, suggestions are very welcome.

Regards,
Lukasz Luba

[1] https://lore.kernel.org/linux-pm/20220207073036.14901-2-l...

Lukasz Luba (2):
  dt-bindings: power: add Energy Model bindings
  opp: Add support for 'advanced' Energy Model in DT

 .../bindings/power/energy-model.yaml          | 51 ++++++++++
 drivers/opp/of.c                              | 95 ++++++++++++++++++-
 2 files changed, 145 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/power/energy-model.yaml

-- 
2.17.1