[PATCH v2 00/12] clk: qcom: Add PDM GP_MN fractional clock divider driver and DT support

[Taniya Das]

The Peripheral Web PDM block on several Qualcomm SoCs contains a GP_MN
fractional divider that generates a clock output from the PDM XO4 clock.
The output can be routed to a dedicated GPIO pin for use as an external
reference clock.

This series adds the binding, a runtime PM-aware GP_MN divider driver,
and the GCC, pinctrl, and DT support needed on QCS615, QCS8300, SA8775P,
and SC7280. GP_MN controller nodes are disabled by default so boards must
explicitly opt in before the output pin is muxed.

Changes in v2:
- Add SoC-specific compatible strings with a qcom,sc7280-gp-mnd
  fallback, map the 0x1000-byte register region, and document the PDM
  source rates. [#Konrad Dybcio]
- Use runtime PM and pm_clk for AHB register-access clock management,
  rely on the pinctrl core's default-state selection, and generate the
  output-clock name. [#Dmitry Baryshkov]
- Enforce valid GP_MN duty-cycle constraints and report high-phase duty
  cycles through the common clock framework.
- Add and register configurable PDM XO4 divider clocks and their public
  IDs for all supported SoCs, allowing the source rate to be configured.
- Split the pinctrl changes by SoC, retain Reviewed-by tags, and combine
  each SoC's pin state and controller node into one DTS patch.
  [#Konrad Dybcio]
- Correct the SC7280 output to gpio60 and disable every GP_MN controller
  node by default. Add QCS615 support as well. [#Luca Weiss]
- Link[v1]: https://lore.kernel.org/lkml/20260602-pdm_clk_gp_mnd_v1-v1-0-1522662b6c53@xxxxxxxxxxxxxxxx/

The series is organized as follows:

  1. DT binding for the PDM GP_MN divider
  2. GCC PDM XO4 divider clock IDs
  3. PDM GP_MN divider driver
  4. GCC PDM XO4 divider clocks
  5-8. GP_MN pin mux support for QCS8300, SA8775P, SC7280, and QCS615
  9-12. GP_MN DT support for QCS8300, SA8775P, SC7280, and QCS615

Signed-off-by: Taniya Das <taniya.das@xxxxxxxxxxxxxxxx>
---
Taniya Das (12):
      dt-bindings: clock: qcom: Add bindings for PDM GP_MN clock divider
      dt-bindings: clock: qcom: Add PDM XO4 divider clock IDs
      clk: qcom: Add a driver for PDM GP_MN fractional clock divider
      clk: qcom: gcc: Add configurable PDM XO4 div clocks across targets
      pinctrl: qcom: qcs8300: Add gp_mn mux function
      pinctrl: qcom: sa8775p: Add gp_mn mux function
      pinctrl: qcom: sc7280: Add gp_mn mux function
      pinctrl: qcom: qcs615: Add gp_mn mux function
      arm64: dts: qcom: qcs8300: Add GP M/N clock controller
      arm64: dts: qcom: sa8775p: Add GP M/N clock controller
      arm64: dts: qcom: sc7280: Add GP M/N clock controller
      arm64: dts: qcom: qcs615: Add GP M/N clock controller

 .../devicetree/bindings/clock/qcom,clk-gp-mnd.yaml |  98 ++++++
 arch/arm64/boot/dts/qcom/kodiak.dtsi               |  21 ++
 arch/arm64/boot/dts/qcom/lemans.dtsi               |  21 ++
 arch/arm64/boot/dts/qcom/monaco.dtsi               |  21 ++
 arch/arm64/boot/dts/qcom/talos.dtsi                |  21 ++
 drivers/clk/qcom/Kconfig                           |  15 +
 drivers/clk/qcom/Makefile                          |   1 +
 drivers/clk/qcom/clk-gp-mnd.c                      | 333 +++++++++++++++++++++
 drivers/clk/qcom/gcc-qcs615.c                      |  20 ++
 drivers/clk/qcom/gcc-qcs8300.c                     |  20 ++
 drivers/clk/qcom/gcc-sa8775p.c                     |  20 ++
 drivers/clk/qcom/gcc-sc7280.c                      |  20 ++
 drivers/pinctrl/qcom/pinctrl-qcs615.c              |   8 +-
 drivers/pinctrl/qcom/pinctrl-qcs8300.c             |   9 +-
 drivers/pinctrl/qcom/pinctrl-sa8775p.c             |   8 +-
 drivers/pinctrl/qcom/pinctrl-sc7280.c              |   8 +-
 include/dt-bindings/clock/qcom,gcc-sc7280.h        |   1 +
 include/dt-bindings/clock/qcom,qcs615-gcc.h        |   2 +
 include/dt-bindings/clock/qcom,qcs8300-gcc.h       |   1 +
 include/dt-bindings/clock/qcom,sa8775p-gcc.h       |   1 +
 20 files changed, 645 insertions(+), 4 deletions(-)
---
base-commit: 4eb2586bd40db27d77cc5b724ca9386ed0c71d53
change-id: 20261013-b4-pdm_clk_gp_mnd_v2-993396fc6cac

Best regards,
-- 
Taniya Das <taniya.das@xxxxxxxxxxxxxxxx>