[PATCH v3 0/6] Enable USB3 Super-Speed support for QCM6490/SC7280

[Balaji Selvanathan]

This series enables USB3 Super-Speed functionality on QCM6490 and SC7280
platforms by adding support for the QMP USB3-DP Combo PHY. The combo PHY
is a dual-mode PHY that can operate in either USB3 or DisplayPort mode,
and this implementation focuses on USB3 mode to enable Super-Speed USB
support.

The series adds the necessary clock support, implements the
QMP Combo PHY driver ported from upstream Linux, and automates USB speed
fixup.
---
Changes in v3:
- Corrected regulator names in drivers/phy/qcom/phy-qcom-qmp-combo.c
- Made regulators mandatory in phy probe;
  if regulator not present, now probe fails
- Removed support to manually disable the USB HS fixup via Kconfig.
- Instead added code to automatically detect if
  SSPHY driver is available and do HS fixup only if SSPHY driver is
  not available.
- Link to v2: https://lore.kernel.org/u-boot/20251124155503.2839766-1-balaji.selvanathan@oss.qualcomm.com/

Changes in v2:
- Gave correct commit id for reference linux implementation for
  adding mdelay in drivers/usb/dwc3/core.c
- In drivers/phy/qcom/phy-qcom-qmp-combo.c:
	- Added pipe clock disable in qmp_combo_power_off sequence
	- Added all required clocks except pipe clock
          in qmp_combo_phy_clk_l
	- All clocks except pipe clock are enabled and disabled
	  seperate from pipe clock
	- Added support for regulator power supplies
	- Added a minimal xlate to only return the USB3 phy
- Added "drivers/phy/qcom" to ARM SNAPDRAGON section in MAINTAINERS file
- Link to v1: https://lore.kernel.org/u-boot/20251119152530.4175628-1-balaji.selvanathan@oss.qualcomm.com/
--- 
Balaji Selvanathan (6):
  drivers: clk: qcom: sc7280: Add USB3 PHY pipe clock
  drivers: usb: dwc3: Add delay after core soft reset
  drivers: phy: qcom: Add QMP USB3-DP Combo PHY driver
  arch: arm: mach-snapdragon: Auto-detect USB SSPHY driver support
  configs: qcm6490: Enable super-speed USB support
  MAINTAINERS: Add entry for Qualcomm PHY drivers

 MAINTAINERS                                |   1 +
 arch/arm/mach-snapdragon/of_fixup.c        | 130 ++++-
 configs/qcm6490_defconfig                  |   2 +
 drivers/clk/qcom/clock-sc7280.c            |   1 +
 drivers/phy/qcom/Kconfig                   |   8 +
 drivers/phy/qcom/Makefile                  |   1 +
 drivers/phy/qcom/phy-qcom-qmp-combo.c      | 644 +++++++++++++++++++++
 drivers/phy/qcom/phy-qcom-qmp-common.h     |  62 ++
 drivers/phy/qcom/phy-qcom-qmp-dp-com-v3.h  |  18 +
 drivers/phy/qcom/phy-qcom-qmp-pcs-usb-v4.h |  34 ++
 drivers/phy/qcom/phy-qcom-qmp.h            |  17 +
 drivers/usb/dwc3/core.c                    |   2 +
 12 files changed, 902 insertions(+), 18 deletions(-)
 create mode 100644 drivers/phy/qcom/phy-qcom-qmp-combo.c
 create mode 100644 drivers/phy/qcom/phy-qcom-qmp-common.h
 create mode 100644 drivers/phy/qcom/phy-qcom-qmp-dp-com-v3.h
 create mode 100644 drivers/phy/qcom/phy-qcom-qmp-pcs-usb-v4.h

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2.34.1