[PATCH 0/2] usb: cdns3: USBSSP platform driver support

[Peter Chen <peter.chen@cixtech.com>]

Hi Pawel,

The Cadence USBSSP (CDNSP) controller was previously only accessible
through PCI, coupling the gadget driver with the PCI glue layer into a
single monolithic module (cdnsp-udc-pci). This prevented using the
CDNSP IP on SoC/platform designs that expose the controller through
device tree, eg, CIX Sky1 SoC.

In this series, it restructures the driver to decouple the CDNSP gadget
from PCI, and refactor cdnsp-pci.c into a thin PCI-to-platform wrapper (similar
to cdns3-pci-wrap.c) that registers a platform device and passes
PCI resources and platform data to the common platform driver. So, please
help test it in your platform.

The changes are tested with random configuration combination tests.

============================================================
ALL TESTS COMPLETE. Summary:
============================================================
Starting cdns3 config combination tests...
Timestamp: 2026年 03月 02日 星期一 09:34:47 CST

PASS: all-builtin (SUPPORT=y CDNS3=y GADGET=y HOST=y CDNSP=y CDNSP_G=y CDNSP_H=y)
PASS: support-y_cdns3-m_gadget-y (SUPPORT=y CDNS3=m GADGET=y HOST=y CDNSP=y CDNSP_G=y CDNSP_H=y)
PASS: support-y_cdns3-m_gadget-n (SUPPORT=y CDNS3=m GADGET=n HOST=y CDNSP=y CDNSP_G=y CDNSP_H=y)
PASS: support-y_cdnsp-m_gadget-y (SUPPORT=y CDNS3=y GADGET=y HOST=y CDNSP=m CDNSP_G=y CDNSP_H=y)
PASS: all-module (SUPPORT=m CDNS3=m GADGET=y HOST=y CDNSP=m CDNSP_G=y CDNSP_H=y)
PASS: no-cdns3 (SUPPORT=y CDNS3=n GADGET=n HOST=n CDNSP=y CDNSP_G=y CDNSP_H=y)
PASS: no-gadget (SUPPORT=y CDNS3=y GADGET=n HOST=y CDNSP=y CDNSP_G=n CDNSP_H=y)
PASS: support-y_both-m_gadget-y (SUPPORT=y CDNS3=m GADGET=y HOST=y CDNSP=m CDNSP_G=y CDNSP_H=y)
PASS: minimal-module (SUPPORT=m CDNS3=m GADGET=n HOST=n CDNSP=m CDNSP_G=n CDNSP_H=n)

This patch was developed with assistance from Anthropic Claude Opus 4.6.

Peter Chen (2):
  usb: cdns3: Add USBSSP platform driver support
  dt-bindings: usb: cdns,usb3: Add support for USBSSP

 .../devicetree/bindings/usb/cdns,usb3.yaml    |  36 ++-
 drivers/usb/cdns3/Kconfig                     |  44 ++--
 drivers/usb/cdns3/Makefile                    |  30 +--
 drivers/usb/cdns3/cdns3-gadget.c              |   4 +
 drivers/usb/cdns3/cdns3-plat.c                |  14 +-
 drivers/usb/cdns3/cdnsp-gadget.c              |   4 +
 drivers/usb/cdns3/cdnsp-pci.c                 | 221 ++++++++----------
 drivers/usb/cdns3/core.h                      |   1 +
 drivers/usb/cdns3/gadget-export.h             |   4 +-
 9 files changed, 184 insertions(+), 174 deletions(-)

-- 
2.50.1