[PATCH v3 0/2] Add LPASS VA CSR HeartBeat pulse clock support

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.

Signed-off-by: Sarath Ganapathiraju <[email protected]>
---
Changes in v3:
- Moved the qcom,lpass-va-csr binding from
  Documentation/devicetree/bindings/sound/ to
  Documentation/devicetree/bindings/clock/ since it is a pure clock
  provider with no ASoC dependency (Krzysztof).
- Moved the driver from sound/soc/codecs/ to drivers/clk/qcom/ for
  the same reason; sound/soc/codecs/Kconfig now selects
  QCOM_CLK_LPASS_VA_CSR instead of carrying the driver (Krzysztof).
- Rewrote the binding description to explain the hardware instead of
  duplicating schema text (Krzysztof).
- Dropped redundant reg and "#clock-cells" descriptions from the
  binding (Krzysztof).
- Switched from unevaluatedProperties to additionalProperties: false
  in the binding (Krzysztof).
- Renamed the example node to the generic clock-controller@7ee0000
  (Krzysztof).
- Dropped the qcom,lpass-va-macro binding extension patch — no
  in-tree user yet; will be resubmitted with the hawi DTSI changes.
- Link to v2: https://lore.kernel.org/linux-arm-msm/[email protected]/


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,lpass-va-csr.yaml     |  49 ++++++
 drivers/clk/qcom/Kconfig                      |  12 ++
 drivers/clk/qcom/Makefile                     |   1 +
 drivers/clk/qcom/lpass-va-csr.c               | 143 ++++++++++++++++++
 sound/soc/codecs/Kconfig                      |   1 +
 5 files changed, 206 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/qcom,lpass-va-csr.yaml
 create mode 100644 drivers/clk/qcom/lpass-va-csr.c

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2.34.1