| From: |
| Lukasz Luba <lukasz.luba-AT-arm.com> |
| To: |
| linux-kernel-AT-vger.kernel.org |
| Subject: |
| [PATCH v3 0/4] Introduce "opp-microwatt" and 'advanced' Energy Model from DT |
| Date: |
| Thu, 24 Feb 2022 08:11:27 +0000 |
| Message-ID: |
| <20220224081131.27282-1-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:
Existing machinery in the OPP framework now handles "opp-microwatt", similarly
to "opp-microamp". It also has helper exported function to get power from OPP.
For the EM, it adds a new callback in OPP framework to use this new API and
read power while having an opp pointer. It's agreed to work with OPP-v2.
Comments, suggestions are very welcome.
changelog:
v3:
- added generic support in the OPP for "opp-microwatt"
- renamed _of_has_opp_microwatt_property() and return bool from it
- simplified _of_has_opp_microwatt_property() just checking 1st opp's power
- squashed the return ret; into return em_dev_register_perf_domain();
- added EM documentation update patch
v2 [2]
Regards,
Lukasz Luba
[1] https://lore.kernel.org/linux-pm/20220207073036.14901-2-l...
[2] https://lore.kernel.org/linux-pm/20220222140746.12293-1-l...
Lukasz Luba (4):
dt-bindings: opp: Add "opp-microwatt" entry in the OPP
OPP: Add "opp-microwatt" supporting code
OPP: Add support of "opp-microwatt" for advanced EM registration
Documentation: EM: Describe new registration method using DT
.../devicetree/bindings/opp/opp-v2-base.yaml | 15 +++
Documentation/power/energy-model.rst | 10 ++
drivers/opp/core.c | 20 ++++
drivers/opp/of.c | 105 +++++++++++++++++-
include/linux/pm_opp.h | 12 +-
5 files changed, 159 insertions(+), 3 deletions(-)
--
2.17.1
