[PATCH v3 0/4] Add USB support for Canaan K230

[Jiayu Du]

Add support for the USB PHY and DWC2 IP which is used by Canaan K230,
and made relevant changes to the DTS.

This series is based on the initial 100ask K230 DshanPi series [1] which
is based on the clock and pinctrl series. Check the details in the link.

Link: https://lore.kernel.org/all/20260115060801.16819-1-jiayu.riscv@isrc.iscas.ac.cn/ [1]

Changes in v3:
- Shrink reg length to match the address/size-cells in k230-usb-phy yaml.
- Move all PHY instance creation and initialization from xlate to probe.
- Modify xlate function to only perform index lookup for PHY instances.
- Define all register base offsets macros at the top of file instead of
  hard-coding magic numbers directly in probe.
- Link to v2: https://lore.kernel.org/all/20260115064223.21926-1-jiayu.riscv@isrc.iscas.ac.cn/

Changes in v2:
- Fold the child into the parent in dtsi.
- Define one usbphy with phy-cells=1.
- Delete the clock of the usbphy as it is not needed.
- Link to v1: https://lore.kernel.org/all/20251230023725.15966-1-jiayu.riscv@isrc.iscas.ac.cn/

Jiayu Du (4):
  dt-bindings: phy: Add Canaan K230 USB PHY
  dt-bindings: usb: dwc2: Add support for Canaan K230 SoC
  phy: usb: Add driver for Canaan K230 USB 2.0 PHY
  riscv: dts: canaan: Add syscon and USB nodes for K230

 .../bindings/phy/canaan,k230-usb-phy.yaml     |  35 +++
 .../devicetree/bindings/usb/dwc2.yaml         |   3 +
 .../boot/dts/canaan/k230-canmv-dshanpi.dts    |  17 ++
 arch/riscv/boot/dts/canaan/k230.dtsi          |  35 +++
 drivers/phy/Kconfig                           |   1 +
 drivers/phy/Makefile                          |   1 +
 drivers/phy/canaan/Kconfig                    |  14 +
 drivers/phy/canaan/Makefile                   |   2 +
 drivers/phy/canaan/phy-k230-usb.c             | 283 ++++++++++++++++++
 9 files changed, 391 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/canaan,k230-usb-phy.yaml
 create mode 100644 drivers/phy/canaan/Kconfig
 create mode 100644 drivers/phy/canaan/Makefile
 create mode 100644 drivers/phy/canaan/phy-k230-usb.c

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2.52.0