[PATCH v17 0/6] Invoke rpmh_flush for non OSI targets

[Maulik Shah]

Changes in v17:
- Address Stephen's comments on change 3 and change 4.
- Add Stephen's Reviewed-by on change 5.

Changes in v16:
- Use base address in probe only, drop change to save it in drv->base
- Address Doug's comments on change 5,6 and 7.
- Add Doug's Reviewed-by.

Changes in v15:
- Address Doug's comments on change 3 of v14 and add Reviewed-by
- Split change 4 of v14 to save drv->base in a new change
- Address Doug's comments on change 4, 5, 6 of v14
- Add missing NOTIFY_OK for rpmh_flush() success case
- First 5 changes in this series can be merged without change 6 and 7

Changes in v14:
- Address Doug's comments on change 3 from v13
- Drop new APIs for start and end transaction from change 4 in v13
- Update change 4 to use cpu pm notifications instead
- Add [5] as change 5 to enable use of WAKE TCS when ACTIVE TCS count is 0
- Add change 6 to Allow multiple WAKE TCS to be used as ACTIVE TCSes
- First 4 changes can be merged even without change 5 and 6.

Changes in v13:
- Address Stephen's comment to maintain COMPILE_TEST
- Address Doug's comments and add new APIs for start and end transaction

Changes in v12:
- Kconfig change to remove COMPILE_TEST was dropped in v11, reinclude it.

Changes in v11:
- Address Doug's comments on change 2 and 3
- Include change to invalidate TCSes before flush from [4]

Changes in v10:
- Address Evan's comments to update commit message on change 2
- Add Evan's Reviewed by on change 2
- Remove comment from rpmh_flush() related to last CPU invoking it
- Rebase all changes on top of next-20200302

Changes in v9:
- Keep rpmh_flush() to invoke from within cache_lock
- Remove comments related to only last cpu invoking rpmh_flush()

Changes in v8:
- Address Stephen's comments on changes 2 and 3
- Add Reviewed by from Stephen on change 1

Changes in v7:
- Address Srinivas's comments to update commit text
- Add Reviewed by from Srinivas

Changes in v6:
- Drop 1 & 2 changes from v5 as they already landed in maintainer tree
- Drop 3 & 4 changes from v5 as no user at present for power domain in rsc
- Rename subject to appropriate since power domain changes are dropped
- Rebase other changes on top of next-20200221

Changes in v5:
- Add Rob's Acked by on dt-bindings change
- Drop firmware psci change
- Update cpuidle stats in dtsi to follow PC mode
- Include change to update dirty flag when data is updated from [4]
- Add change to invoke rpmh_flush when caches are dirty

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 various
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
[4] https://patchwork.kernel.org/project/linux-arm-msm/list/?series=236503
[5] https://patchwork.kernel.org/patch/10818129

Maulik Shah (5):
  arm64: dts: qcom: sc7180: Add cpuidle low power states
  soc: qcom: rpmh: Update dirty flag only when data changes
  soc: qcom: rpmh: Invalidate SLEEP and WAKE TCSes before flushing new
    data
  soc: qcom: rpmh: Invoke rpmh_flush() for dirty caches
  soc: qcom: rpmh-rsc: Allow using free WAKE TCS for active request

Raju P.L.S.S.S.N (1):
  soc: qcom: rpmh-rsc: Clear active mode configuration for wake TCS

 arch/arm64/boot/dts/qcom/sc7180.dtsi |  78 +++++++++++++
 drivers/soc/qcom/rpmh-internal.h     |  25 ++--
 drivers/soc/qcom/rpmh-rsc.c          | 220 +++++++++++++++++++++++++++--------
 drivers/soc/qcom/rpmh.c              |  79 ++++++-------
 4 files changed, 305 insertions(+), 97 deletions(-)

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