linux-kernel - [PATCH v5 0/5] LLCC: Support for Broadcast

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Message-Id: <cover.1716228054.git.quic_uchalich@quicinc.com>
Date: Mon, 20 May 2024 14:00:12 -0700
From: Unnathi Chalicheemala <quic_uchalich@...cinc.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc: Unnathi Chalicheemala <quic_uchalich@...cinc.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...cinc.com
Subject: [PATCH v5 0/5] LLCC: Support for Broadcast_AND region

This series adds:
1. Device tree register mapping for Broadcast_AND region in SM8450,
SM8550, SM8650.
2. LLCC driver updates to reflect addition of Broadcast_AND regmap.

To support CSR programming, a broadcast interface is used to program all
channels in a single command. Until SM8450 there was only one broadcast
region (Broadcast_OR) used to broadcast write and check for status bit
0. From SM8450 onwards another broadcast region (Broadcast_AND) has been
added which checks for status bit 1.

This series updates the device trees from SM8450 onwards to have a
mapping to this Broadcast_AND region. It also updates the llcc_drv_data
structure with a regmap for Broadcast_AND region and corrects the
broadcast region used to check for status bit 1.

Changes in v5:
- Add additional check to remove warning from devres.c on older
chipsets.
- Carried over Bjorn's and Krzysztof's R-b tags from v4.

Changes in v4:
- Updated Devicetree patches' commit messages to make problem statement
clearer
- Resolved Konrad's comments on driver code patch
- Updated v3 changelog to include dropped R-b tag

Changes in v3:
- Removed new example in dt-bindings patch and ran 'make
DT_CHECKER_FLAGS=-m dt_binding_check'
- Dropped Krzysztof's R-b tag on dt-bindings patch
- Use of ternary operator in llcc_update_act_ctrl()
- Add comment before initialization of Broadcast_AND regmap in probe
- Move DeviceTree patches to the end

Changes in v2:
- Added an additional check in the case old DT files are used for
above mentioned chipsets for backwards compatibility
- Moved addition of if check in llcc_update_act_ctrl() to a separate
"Fixes" patch; not part of this series

Link to v4: https://lore.kernel.org/all/20240329-llcc-broadcast-and-v4-0-107c76fd8ceb@quicinc.com/
Link to v3: https://lore.kernel.org/all/cover.1708551850.git.quic_uchalich@quicinc.com/
Link to v2: https://lore.kernel.org/all/cover.1707202761.git.quic_uchalich@quicinc.com/
Link to v1: https://lore.kernel.org/all/cover.1706296015.git.quic_uchalich@quicinc.com/

Unnathi Chalicheemala (5):
  dt-bindings: arm: msm: Add llcc Broadcast_AND register
  soc: qcom: llcc: Add regmap for Broadcast_AND region
  arm64: dts: qcom: sm8450: Add Broadcast_AND register in LLCC block
  arm64: dts: qcom: sm8550: Add Broadcast_AND register in LLCC block
  arm64: dts: qcom: sm8650: Add Broadcast_AND register in LLCC block

 .../devicetree/bindings/cache/qcom,llcc.yaml  | 27 ++++++++++++++++++-
 arch/arm64/boot/dts/qcom/sm8450.dtsi          |  5 ++--
 arch/arm64/boot/dts/qcom/sm8550.dtsi          |  6 +++--
 arch/arm64/boot/dts/qcom/sm8650.dtsi          |  6 +++--
 drivers/soc/qcom/llcc-qcom.c                  | 16 ++++++++++-
 include/linux/soc/qcom/llcc-qcom.h            |  4 ++-
 6 files changed, 55 insertions(+), 9 deletions(-)

-- 
2.34.1