[PATCH] usb: gadget: udc: Fix duplicate uclass name

[Zixun LI]

Hi Mattijs,

On Wed, Aug 7, 2024 at 9:07 AM Mattijs Korpershoek
<mkorpershoek at baylibre.com> wrote:
>
>
> Have you identified boards which use the DT alias that will break
> with this patch?
>
> Maybe we can detail the required fix in the commit message a bit as well?
> Or, if you know of a board that uses "usb" as DT alias sequence number,
> we can submit a fix alongside with this one to document the fix.

I did a search and it affects mostly i.MX devices and Nuvoton npcm845 where
host and device controller use the same alias.

like imx6qdl.dtsi:
aliases {
...
    usb0 = &usbotg;
    usb1 = &usbh1;
    usb2 = &usbh2;
    usb3 = &usbh3;
};

nuvoton-npcm845-evb.dts:
aliases {
...
    usb0 = &udc0;
    usb1 = &ehci1;
    usb2 = &ehci2;
};

But I got lost in EHCI's code, like in ehci_register() when ctrl->init ==
USB_INIT_DEVICE the function returns without the actual device init ?
I'm not sure how their gadget mode works and if it's really broken or not.