[PATCH 0/3] phy: nuvoton: extend MA35D1 USB2 PHY driver for dual-port OTG support

[Joey Lu]

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.

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

A previous series [1] added a separate phy-ma35d1-otg.c driver for this.
Following reviewer suggestion to reuse the existing phy-ma35d1-usb2.c
driver rather than introduce a new one, that series has been dropped and
this series instead extends the existing driver.

Changes in this series:

  Patch 1 updates the nuvoton,ma35d1-usb2-phy binding: the PHY node
  becomes a child of the syscon node (reg = <0x60 0x14>), nuvoton,sys
  phandle and clocks are removed, and #phy-cells changes from 0 to 1
  for per-port selection.  Optional nuvoton,rcalcode and
  nuvoton,oc-active-high properties are added.

  Patch 2 updates the MA35D1 DTS: sys gains simple-mfd, usb-phy at 60 is
  added as a syscon child, and DWC2/EHCI0/EHCI1/OHCI0/OHCI1 nodes are
  added.  Board files enable the nodes and add HSUSB pinctrl.

  Patch 3 extends phy-ma35d1-usb2.c: a loop creates two struct phy
  objects; a unified .init handles both ports with parametric register
  macros; clock management is removed (each controller gates its own
  clock); a read-only USB role switch is registered for PHY0 reporting
  the USB ID pin via PWRONOTP[16].

Link: [1] https://lore.kernel.org/linux-phy/20260604101220.1092822-1-a0987203069@gmail.com/T/#t

Joey Lu (3):
  dt-bindings: phy: nuvoton,ma35d1-usb2-phy: extend for dual-port OTG
    support
  arm64: dts: nuvoton: ma35d1: add USB controllers and dual-port PHY
    node
  phy: nuvoton: phy-ma35d1-usb2: extend to dual-port with OTG support

 .../bindings/phy/nuvoton,ma35d1-usb2-phy.yaml |  67 +++--
 .../boot/dts/nuvoton/ma35d1-iot-512m.dts      |  36 +++
 .../boot/dts/nuvoton/ma35d1-som-256m.dts      |  36 +++
 arch/arm64/boot/dts/nuvoton/ma35d1.dtsi       |  68 ++++-
 drivers/phy/nuvoton/phy-ma35d1-usb2.c         | 263 +++++++++++++-----
 5 files changed, 378 insertions(+), 92 deletions(-)


base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731
-- 
2.43.0