[PATCH v7 0/4] phy: nuvoton: extend MA35D1 USB2 PHY driver for dual-port OTG support

[Joey Lu <a0987203069@gmail.com>]

The MA35D1 SoC has two USB PHY ports managed by a shared hardware block:

  - PHY0 (USB0): OTG port shared between the DWC2 gadget controller and
    the EHCI0/OHCI0 host controllers.  A hardware mux automatically routes
    USB0 signals to the correct controller based on the USB ID pin state.

  - PHY1 (USB1): dedicated host-only port for EHCI1/OHCI1.

This series extends the existing phy-ma35d1-usb2.c driver and its binding
to cover both ports and add OTG role-switch support, while keeping full
backward compatibility with existing device trees.

Changes since v6:

  - phy: update the copyright notice in the rewritten driver header to
    "2024-2026" instead of "2026", preserving the original 2024 date
    rather than dropping it.

  - phy: split the unused linux/io.h removal out of patch 4 into its
    own patch (3/4), since it's unrelated cleanup that predates this
    series (the driver has never done direct MMIO access; all register
    access goes through regmap via syscon_regmap_lookup_by_phandle()).
    Placed immediately before patch 4 since that is the first patch in
    the series to touch this file.

Joey Lu (4):
  dt-bindings: phy: nuvoton,ma35d1-usb2-phy: extend for dual-port and
    OTG
  arm64: dts: nuvoton: ma35d1: add USB controllers and dual-port PHY
    node
  phy: nuvoton: phy-ma35d1-usb2: remove unused linux/io.h include
  phy: nuvoton: phy-ma35d1-usb2: extend to dual-port with OTG support

 .../bindings/phy/nuvoton,ma35d1-usb2-phy.yaml |  44 ++-
 .../boot/dts/nuvoton/ma35d1-iot-512m.dts      |  36 +++
 .../boot/dts/nuvoton/ma35d1-som-256m.dts      |  36 +++
 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi       |  65 ++++
 drivers/phy/nuvoton/phy-ma35d1-usb2.c         | 286 +++++++++++++-----
 5 files changed, 390 insertions(+), 77 deletions(-)


base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
-- 
2.43.0