Re: [PATCH v3 1/3] arm64: dts: qcom: hamoa: Number usb_2 HS port and add M.2 endpoint stubs

[Konrad Dybcio <konradybcio@kernel.org>]

On 7/29/26 12:27 PM, Wei Deng wrote:
> Number the existing High-Speed data bus port of the usb_2 DWC3
> controller as port@0, consistent with the snps,dwc3 binding convention.
> 
> Also add an empty port@1 endpoint stub (usb_2_m2_ep) for the USB 2.0
> interface to M.2 peripherals, and an empty UART endpoint stub
> (uart14_ep) in the uart14 serial controller, so that board DTS files
> can reference these labels directly without re-entering the port
> hierarchy.
> 
> Signed-off-by: Wei Deng <wei.deng@oss.qualcomm.com>
> ---

[...]

> -			port {
> -				usb_2_dwc3_hs: endpoint {
> +			ports {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +
> +				port@0 {
> +					reg = <0>;
> +
> +					usb_2_dwc3_hs: endpoint {
> +					};
> +				};
> +
> +				port@1 {
> +					reg = <1>;
> +
> +					usb_2_m2_ep: endpoint {
> +					};

What? Why?

1. what's wrong with assigning the existing endpoint to the m2 graph?
2. this breaks bindings - port@1 is supposed to represent the superspeed
   connection
3. why would we have two endpoints for the same physical HS connection?

Konrad