[PATCH v2 0/4] clk: qcom: Add common clkref support and migrate Glymur

[Qiang Yu]

This series adds a common clkref_en implementation and converts glymur to
use it, along with the related binding and DTS updates.

The PCIe clkref clocks on Glymur gate the QREF block which provides
reference clocks to the PCIe PHYs. QREF requires LDO supplies and a
reference voltage from the refgen block to operate. The refgen block
itself requires vdda-refgen_0p9 and vdda-refgen_1p2 LDOs to function.

Previously, these QREF votes were done in PHY drivers. In earlier
discussion [1], the feedback was that this is the wrong ownership point:
those supplies are for the QREF controlled by clkref registers, not for
PHY directly. Based on that feedback, this series keeps the regulator
handling with the clkref control path.

Another reason for this series is reuse. clkref_en registers may live in
different blocks across platforms (for example TCSR on Glymur, TLMM on
SM8750 [2]), while the behavior is the same. The common helper lets each
driver provide simple descriptors (name, offset, optional supplies) and
reuse shared registration and runtime logic.

[1] https://lore.kernel.org/lkml/aEBfV2M-ZqDF7aRz@xxxxxxxxxxxxxxxxxxxx/
[2] https://lore.kernel.org/linux-arm-msm/20260202-topic-8750_tcsr-v1-0-cd7e6648c64f@xxxxxxxxxxxxxxxx/

Changes in v2:
- RFC tag dropped
- Changed back to additionalProperties: false
- Moved all Glymur supply properties into top-level properties so they are explicitly defined.
- Link to v1: https://lore.kernel.org/all/20260331-qref_vote-v1-0-3fd7fbf87864@xxxxxxxxxxxxxxxx/

Signed-off-by: Qiang Yu <qiang.yu@xxxxxxxxxxxxxxxx>
---
Qiang Yu (4):
      dt-bindings: clock: qcom: Add QREF regulator supplies for glymur
      clk: qcom: Add generic clkref_en support
      clk: qcom: tcsrcc-glymur: Migrate tcsr_pcie_N_clkref_en to clk_ref common helper
      arm64: dts: qcom: glymur: Add QREF regulator supplies to TCSR

 .../bindings/clock/qcom,sm8550-tcsr.yaml           |  40 +++
 arch/arm64/boot/dts/qcom/glymur-crd.dts            |  19 ++
 drivers/clk/qcom/Makefile                          |   1 +
 drivers/clk/qcom/clk-ref.c                         | 202 ++++++++++++
 drivers/clk/qcom/tcsrcc-glymur.c                   | 340 ++++++---------------
 include/linux/clk/qcom.h                           |  69 +++++
 6 files changed, 424 insertions(+), 247 deletions(-)
---
base-commit: c7275b05bc428c7373d97aa2da02d3a7fa6b9f66
change-id: 20260419-vote_qref_in_tcsrcc-c015dc0c2ae8

Best regards,
--  
Qiang Yu <qiang.yu@xxxxxxxxxxxxxxxx>