linux-kernel - [PATCH v4 0/6] Add RSC power domain support

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Date:   Wed,  5 Feb 2020 17:56:06 +0530
From:   Maulik Shah <mkshah@...eaurora.org>
To:     swboyd@...omium.org, agross@...nel.org, david.brown@...aro.org,
        sudeep.holla@....com, Lorenzo.Pieralisi@....com
Cc:     linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        bjorn.andersson@...aro.org, evgreen@...omium.org,
        dianders@...omium.org, rnayak@...eaurora.org, ilina@...eaurora.org,
        lsrao@...eaurora.org, ulf.hansson@...aro.org, rjw@...ysocki.net,
        Maulik Shah <mkshah@...eaurora.org>
Subject: [PATCH v4 0/6] Add RSC power domain support

Changes in v4:
- Add change to allow hierarchical topology in PC mode
- Drop hierarchical domain idle states converter from v3
- Address Merge sc7180 dtsi change to add low power modes

Changes in v3:
- Address Rob's comment on dt property value
- Address Stephen's comments on rpmh-rsc driver change
- Include sc7180 cpuidle low power mode changes from [1]
- Include hierarchical domain idle states converter change from [2]

Changes in v2:
- Add Stephen's Reviewed-By to the first three patches
- Addressed Stephen's comments on fourth patch
- Include changes to connect rpmh domain to cpuidle and genpds

Resource State Coordinator (RSC) is responsible for powering off/lowering
the requirements from CPU subsystem for the associated hardware like buses,
clocks, and regulators when all CPUs and cluster is powered down.

RSC power domain uses last-man activities provided by genpd framework based on
Ulf Hansoon's patch series[3], when the cluster of CPUs enter deepest idle
states. As a part of domain poweroff, RSC can lower resource state requirements
by flushing the cached sleep and wake state votes for resources.

[1] https://patchwork.kernel.org/patch/11218965
[2] https://patchwork.kernel.org/patch/10941671
[3] https://patchwork.kernel.org/project/linux-arm-msm/list/?series=222355

Maulik Shah (5):
  drivers: qcom: rpmh: fix macro to accept NULL argument
  drivers: qcom: rpmh: remove rpmh_flush export
  dt-bindings: soc: qcom: Add RSC power domain specifier
  drivers: qcom: rpmh-rsc: Add RSC power domain support
  arm64: dts: qcom: sc7180: Add cpuidle low power states

Ulf Hansson (1):
  drivers: firmware: psci: Allow hierarchical topology in PC mode

 .../devicetree/bindings/soc/qcom/rpmh-rsc.txt      |   9 ++
 arch/arm64/boot/dts/qcom/sc7180.dtsi               | 135 +++++++++++++++++++++
 drivers/cpuidle/cpuidle-psci-domain.c              |  32 +++--
 drivers/cpuidle/cpuidle-psci.c                     |  34 +++---
 drivers/soc/qcom/rpmh-internal.h                   |   3 +
 drivers/soc/qcom/rpmh-rsc.c                        |  81 +++++++++++++
 drivers/soc/qcom/rpmh.c                            |  22 ++--
 include/soc/qcom/rpmh.h                            |   5 -
 8 files changed, 269 insertions(+), 52 deletions(-)

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