[PATCH v4 0/2] Add LPASS VA CSR HeartBeat pulse clock support

[Sarath Ganapathiraju via B4 Relay]

The LPASS VA CSR block contains rate generator hardware that produces
a HeartBeat Pulse (also known as RateGen Pulse). This pulse
synchronizes the start of the DMAs and Codec Interfaces for the audio
usecases and can serve as a periodic wakeup source for the DSP.

This series adds the DT binding and driver support to model this
rate generator as a clock provider.

Patch 1 adds the YAML binding for the new qcom,hawi-lpass-va-csr
clock provider node under Documentation/devicetree/bindings/clock/.

Patch 2 adds the lpass-va-csr driver under drivers/clk/qcom that
registers the lpass_heartbeat_pulse clock and enables/disables the
rate generator via regmap when the clock consumer requests it.

Changes in v4:
- Renamed the binding filename and schema ID to hawi-specific naming:
  qcom,lpass-va-csr.yaml -> qcom,hawi-lpass-va-csr.yaml.
- Narrowed the DT example register window to the rate generator
  registers only, and aligned the node name with the base address:
  clock-controller@7eed000 with reg <0x0 0x07eed000 0x0 0x14>.
- Renamed Kconfig symbol QCOM_CLK_LPASS_VA_CSR to
  QCOM_CLK_LPASS_HEARTBEAT_PULSE.
- Added devm_pm_runtime_enable() in lpass-va-csr probe path.
- Dropped the qcom,lpass-va-macro binding extension patch - no in-tree
  user yet; will be resubmitted with the hawi DTSI changes.
- Dropped sound/soc/codecs/Kconfig select wiring from this series to
  keep it clock-only.
- Link to v3: https://lore.kernel.org/all/20260723-master-v3-0-3d67b79b0515@xxxxxxxxxxxxxxxx/

Signed-off-by: Sarath Ganapathiraju <sarath.ganapathiraju@xxxxxxxxxxxxxxxx>
---
Sarath Ganapathiraju (2):
      dt-bindings: clock: qcom: Add LPASS VA CSR HeartBeat pulse clock
      clk: qcom: Add LPASS VA CSR heartbeat pulse clock

 .../bindings/clock/qcom,hawi-lpass-va-csr.yaml     |  51 +++++++
 drivers/clk/qcom/Kconfig                           |  12 ++
 drivers/clk/qcom/Makefile                          |   1 +
 drivers/clk/qcom/lpass-va-csr.c                    | 148 +++++++++++++++++++++
 4 files changed, 212 insertions(+)
---
base-commit: 0f6da28aab51b16762ed82e8fdeaa5042da45b08
change-id: 20260805-master-20260805-sync-d892f9d7a2e0

Best regards,
--  
Sarath Ganapathiraju <sarath.ganapathiraju@xxxxxxxxxxxxxxxx>