[PATCH v7 0/3] Add support for the MTU3 upstream devicetree binding

This series updates the MediaTek MTU3 driver and in-tree devicetrees to
use the upstream binding, removes the obsolete U-Boot-only binding
documents, and adds phase-aware SPL host and gadget support.

Signed-off-by: Carlo Caione <[email protected]>
---
Changes in v7:
- Add phase-aware MTU3 host support in SPL
- Build the shared USB helpers for host-only SPL configurations
- Enable address translation for the xHCI child resources in SPL
- Link to v6: https://patch.msgid.link/20260806-ccaione-upstream-mtu3-spl-gadget-v6-0-66e133a4bf1a@baylibre.com

Changes in v6:
- Remove the obsolete U-Boot-only binding documents and use the synced
  Linux YAML schemas
- Split generic SPL gadget support into a separate patch with phase-specific
  Kconfig symbols
- Drop the misplaced SPL_OF_TRANSLATE selection since SPL host mode is not
  enabled
- Include the returned error code when binding the host or peripheral device
  fails
- Link to v5: https://patch.msgid.link/20260804-ccaione-upstream-mtu3-spl-gadget-v5-1-5c3b6ec44eb5@baylibre.com

Changes in v5:
- Use separate device-MAC and xHCI register resources
- Bind the gadget as an internal device without reusing the controller node
- Bind host mode to an enabled standard xHCI child and consume its resources
- Honor dr_mode, including its default of otg
- Reject the legacy combined-register child layout explicitly
- Enable address translation for an SPL host build
- Keep MT8512 peripheral-only until its host clock and interrupt are known
- Convert the in-tree devicetrees and update the binding documentation
- Keep the driver and devicetree conversion in one bisectable patch
- Link to v4: https://patch.msgid.link/20260722-ccaione-upstream-mtu3-spl-gadget-v4-0-9719f4cecaeb@baylibre.com

Changes in v4:
- Describe mediatek,ssusb as a legacy U-Boot-only binding
- Fix the MAC resource error and remove redundant ofnode initialization
- Convert the MT8183 devicetree to the upstream MTU3 binding
- Link to v3: https://patch.msgid.link/20260720-ccaione-upstream-mtu3-spl-gadget-v3-1-91cff44b1622@baylibre.com

Changes in v3:
- Remove the temporary platform data and derive the binding during probe
- Use dev_read_addr_name() for the MAC resource
- Link to v2: https://patch.msgid.link/20260718-ccaione-upstream-mtu3-spl-gadget-v2-1-7f69ca462559@baylibre.com

Changes in v2:
- Removed typecast horror
- Added platform storage to pass around legacy flags and device
- Link to v1: https://patch.msgid.link/20260717-ccaione-upstream-mtu3-spl-gadget-v1-1-57a3e2d0a2b0@baylibre.com

---
Carlo Caione (3):
      doc: usb: remove obsolete MediaTek MTU3 bindings
      usb: mtu3: support the upstream devicetree binding
      usb: mtu3: add SPL support

 arch/arm/dts/mt8183-pumpkin.dts                    |   4 -
 arch/arm/dts/mt8183.dtsi                           |  17 +-
 arch/arm/dts/mt8512-bm1-emmc.dts                   |   6 +-
 arch/arm/dts/mt8512.dtsi                           |  19 +-
 doc/device-tree-bindings/usb/mediatek,mtk-xhci.txt |  46 -----
 doc/device-tree-bindings/usb/mediatek,mtu3.txt     |  79 -------
 drivers/Makefile                                   |   3 +-
 drivers/usb/mtu3/Kconfig                           |  39 ++++
 drivers/usb/mtu3/Makefile                          |  10 +-
 drivers/usb/mtu3/mtu3.h                            |  12 +-
 drivers/usb/mtu3/mtu3_core.c                       |   4 +-
 drivers/usb/mtu3/mtu3_dr.h                         |   4 +-
 drivers/usb/mtu3/mtu3_host.c                       |  11 +-
 drivers/usb/mtu3/mtu3_hw_regs.h                    |  11 +-
 drivers/usb/mtu3/mtu3_plat.c                       | 227 +++++++++++++++------
 15 files changed, 240 insertions(+), 252 deletions(-)
---
base-commit: 6a77840b2f01e98bbad157fd1984a2dce2a3eecd
change-id: 20260717-ccaione-upstream-mtu3-spl-gadget-aa3d39cad06a

Best regards,
--  
Carlo Caione <[email protected]>