| From: |
| Joey Lu <a0987203069-AT-gmail.com> |
| To: |
| Vinod Koul <vkoul-AT-kernel.org>, Neil Armstrong <neil.armstrong-AT-linaro.org> |
| Subject: |
| [PATCH v3 0/3] phy: nuvoton: extend MA35D1 USB2 PHY driver for dual-port OTG support |
| Date: |
| Wed, 08 Jul 2026 18:36:03 +0800 |
| Message-ID: |
| <20260708103606.1462960-1-a0987203069@gmail.com> |
| Cc: |
| Rob Herring <robh-AT-kernel.org>, Krzysztof Kozlowski <krzk+dt-AT-kernel.org>, Conor Dooley <conor+dt-AT-kernel.org>, Arnd Bergmann <arnd-AT-arndb.de>, Catalin Marinas <catalin.marinas-AT-arm.com>, Jacky Huang <ychuang3-AT-nuvoton.com>, Shan-Chun Hung <schung-AT-nuvoton.com>, Hui-Ping Chen <hpchen0nvt-AT-gmail.com>, Joey Lu <yclu4-AT-nuvoton.com>, linux-phy-AT-lists.infradead.org, devicetree-AT-vger.kernel.org, linux-arm-kernel-AT-lists.infradead.org, linux-kernel-AT-vger.kernel.org, Joey Lu <a0987203069-AT-gmail.com> |
| Archive-link: |
| Article |
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 v2:
- Dropped patch 1 (nuvoton,ma35d1-reset: add simple-mfd and child node
support) entirely. That approach embedded usb-phy@60 as a child of the
syscon node with a reg property, which broke the established ABI for
out-of-tree MA35D1 board files.
- The PHY remains a standalone top-level node as in the mainline binding.
The existing required properties (clocks, nuvoton,sys, #phy-cells) are
retained. No reg property is added.
- '#phy-cells' is now enum: [0, 1] instead of const: 1. Boards using
'#phy-cells = <0>' continue to validate and work unchanged.
- The DTS usb_phy node is a sibling of sys (not its child), retaining
clocks and nuvoton,sys, matching the original binding structure.
Joey Lu (3):
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: extend to dual-port with OTG support
.../bindings/phy/nuvoton,ma35d1-usb2-phy.yaml | 45 ++-
.../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 | 279 +++++++++++++-----
5 files changed, 384 insertions(+), 77 deletions(-)
base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482
--
2.43.0
