Re: [PATCH v6 2/3] usb: mtu3: support the upstream devicetree binding

On 8/6/26 2:54 PM, Carlo Caione wrote:
> The MTU3 glue driver expects a synthetic mediatek,ssusb child that
> combines the device and xHCI register windows. Upstream devicetrees
> instead put the device resources on the controller node and describe the
> xHCI window with a standard child node, so U-Boot cannot use an upstream
> topology.
> 
> Switch to the upstream layout. The controller owns the shared resources
> and the device MAC, with the device register offsets relative to it as in
> Linux. The gadget role binds as a node-less internal device, while the
> host role binds to an enabled xHCI child and uses its own clocks,
> supplies and register window. dr_mode selects the role and defaults to
> otg, and the Kconfig choice constrains which role the build provides.
> The legacy child layout is rejected explicitly so its combined register
> window cannot be mistaken for the device MAC.
> 
> Convert the in-tree MT8183 and MT8512 devicetrees in the same commit so
> neither platform is left without USB. MT8512 stays peripheral-only
> because its xHCI host interrupt is not documented and the
> mediatek,mtk-xhci binding requires it.
> 
> Signed-off-by: Carlo Caione <[email protected]>
Reviewed-by: Marek Vasut <[email protected]>