Re: [PATCH 1/3] usb: hub: add infrastructure to pass onboard_dev port features

[Junzhong Pan]

Hi Marco,

Thank you for your reply!

On 2025/1/6 14:52, Marco Felsch Wrote:
> On 24-12-31, Junzhong Pan wrote:
> > I recently encountered some kind of platforms using an existing onboard
> > hub yet their HW don't utilize the USBPE port power control feature
> > while the hub support it.
> > Instead, we have another GPIO for controlling the vbus of those ports
> > to cut the cost.
>
> That's exactly our use-case too.
>
> > Wonder any idea could use this driver considering the limitation of
> > the usb compatible set the properties of onboard_dev_pdata hard coded?
>
> Sorry but I don't get this.
If the hub have 4 ports, but board only have one gpio to controll all 
those vbus at once, implemented as some kind of gang mode.

In this case, the onboard_dev driver may not respond to the 
USB_PORT_FEAT_POWER, but keep the supply always on except for the 
suspend states.

Do you have any idea how we handle this?

Best Regards,
Pan