linux-kernel - [PATCH v3 00/15] Unregister critical branch clocks + some RPM

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Date: Wed, 20 Dec 2023 01:30:41 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, Andy Gross <agross@...nel.org>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>, 
 linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, 
 Johan Hovold <johan+linaro@...nel.org>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: [PATCH v3 00/15] Unregister critical branch clocks + some RPM

On Qualcomm SoCs, certain branch clocks either need to be always-on, or
should be if you're interested in touching some part of the hardware.

Using CLK_IS_CRITICAL for this purpose sounds like a genius idea,
however that messes with the runtime pm handling - if a clock is
marked as such, the clock controller device will never enter the
"suspended" state, leaving the associated resources online, which in
turn breaks SoC-wide suspend.

This series aims to solve that on a couple SoCs that I could test the
changes on and it sprinkles some runtime pm enablement atop these drivers.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
Changes in v3:
- Rebase (next-20231219)
- Fix up a copypaste mistake in "gcc-sm6375: Unregister critical clocks" (bod)
- Pick up tags
- Link to v2: https://lore.kernel.org/r/20230717-topic-branch_aon_cleanup-v2-0-2a583460ef26@linaro.org

Changes in v2:
- Rebase
- Pick up tags
- Fix up missing pm_runtime_put in SM6375 GCC (Johan)
- Clarify the commit message of "Add runtime PM" commits (Johan)
- "GPU_CCC" -> "GPU_CC" (oops)
- Rebase atop next-20231129
  - Also fix up camcc-sm8550 & gcc-sm4450
  - Unify and clean up the comment style
  - Fix missing comments in gcc-sc7180..
  - Drop Johan's ack from "clk: qcom: Use qcom_branch_set_clk_en()"
- Improve 6115 dt patch commit message (Bjorn)
- Link to v1: https://lore.kernel.org/r/20230717-topic-branch_aon_cleanup-v1-0-27784d27a4f4@linaro.org

---
Konrad Dybcio (15):
      clk: qcom: branch: Add a helper for setting the enable bit
      clk: qcom: Use qcom_branch_set_clk_en()
      clk: qcom: gcc-sm6375: Unregister critical clocks
      clk: qcom: gcc-sm6375: Add runtime PM
      clk: qcom: gpucc-sm6375: Unregister critical clocks
      clk: qcom: gpucc-sm6115: Unregister critical clocks
      clk: qcom: gpucc-sm6115: Add runtime PM
      clk: qcom: gcc-sm6115: Unregister critical clocks
      clk: qcom: gcc-sm6115: Add runtime PM
      clk: qcom: gcc-qcm2290: Unregister critical clocks
      clk: qcom: gcc-qcm2290: Add runtime PM
      arm64: dts: qcom: sm6375: Add VDD_CX to GCC
      arm64: dts: qcom: qcm2290: Add VDD_CX to GCC
      arm64: dts: qcom: sm6115: Add VDD_CX to GCC
      arm64: dts: qcom: sm6115: Add VDD_CX to GPU_CC

 arch/arm64/boot/dts/qcom/qcm2290.dtsi |   1 +
 arch/arm64/boot/dts/qcom/sm6115.dtsi  |   3 +
 arch/arm64/boot/dts/qcom/sm6375.dtsi  |   1 +
 drivers/clk/qcom/camcc-sm8550.c       |   9 +--
 drivers/clk/qcom/clk-branch.h         |   7 ++
 drivers/clk/qcom/dispcc-qcm2290.c     |   3 +-
 drivers/clk/qcom/dispcc-sc7280.c      |   6 +-
 drivers/clk/qcom/dispcc-sc8280xp.c    |   3 +-
 drivers/clk/qcom/dispcc-sm6115.c      |   3 +-
 drivers/clk/qcom/dispcc-sm8250.c      |   3 +-
 drivers/clk/qcom/dispcc-sm8450.c      |   6 +-
 drivers/clk/qcom/dispcc-sm8550.c      |   6 +-
 drivers/clk/qcom/gcc-qcm2290.c        | 127 ++++++-----------------------
 drivers/clk/qcom/gcc-sa8775p.c        |  24 +++---
 drivers/clk/qcom/gcc-sc7180.c         |  21 ++---
 drivers/clk/qcom/gcc-sc7280.c         |  19 ++---
 drivers/clk/qcom/gcc-sc8180x.c        |  27 +++----
 drivers/clk/qcom/gcc-sc8280xp.c       |  24 +++---
 drivers/clk/qcom/gcc-sdx55.c          |  11 +--
 drivers/clk/qcom/gcc-sdx65.c          |  12 +--
 drivers/clk/qcom/gcc-sdx75.c          |   9 +--
 drivers/clk/qcom/gcc-sm4450.c         |  27 ++-----
 drivers/clk/qcom/gcc-sm6115.c         | 145 +++++++---------------------------
 drivers/clk/qcom/gcc-sm6375.c         | 126 +++++++----------------------
 drivers/clk/qcom/gcc-sm7150.c         |  22 ++----
 drivers/clk/qcom/gcc-sm8250.c         |  18 ++---
 drivers/clk/qcom/gcc-sm8350.c         |  19 ++---
 drivers/clk/qcom/gcc-sm8450.c         |  20 ++---
 drivers/clk/qcom/gcc-sm8550.c         |  20 ++---
 drivers/clk/qcom/gpucc-sc7280.c       |   8 +-
 drivers/clk/qcom/gpucc-sc8280xp.c     |   8 +-
 drivers/clk/qcom/gpucc-sm6115.c       |  52 +++++-------
 drivers/clk/qcom/gpucc-sm6375.c       |  33 +-------
 drivers/clk/qcom/gpucc-sm8550.c       |   9 +--
 drivers/clk/qcom/lpasscorecc-sc7180.c |   6 +-
 drivers/clk/qcom/videocc-sm8250.c     |   5 +-
 drivers/clk/qcom/videocc-sm8350.c     |   9 +--
 drivers/clk/qcom/videocc-sm8450.c     |  12 +--
 drivers/clk/qcom/videocc-sm8550.c     |  12 +--
 39 files changed, 236 insertions(+), 640 deletions(-)
---
base-commit: aa4db8324c4d0e67aa4670356df4e9fae14b4d37
change-id: 20230717-topic-branch_aon_cleanup-6976c13fe71c

Best regards,
-- 
Konrad Dybcio <konrad.dybcio@...aro.org>