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

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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





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