Subject: Re: [PATCH v2 3/3] arm64: dts: allwinner: A133: add support for Baijie Helper A133 board

From: Alexander Sverdlin <[email-masked]>
Date: Mon, 18 May 2026 13:29:51 +0200

Hi Andre,

On Mon, 2026-05-18 at 13:16 +0200, Andre Przywara wrote:
> > > And anyway, I see a *dual* USB-A socket on the pictures online, in
> > > addition to the USB-OTG port. So where does the third USB come from? The
> > > A133 only supports one host USB port plus the one OTG port. So is there
> > > an USB hub chip on the board?
> > 
> > There are two hubs, one on each usbphy. OTG side hub is even bus-powered,
> 
> What do you mean with OTG side hub, exactly? Is there a hub on USB0? How 
> does this work, then?

the upstream port of this hub is wired to the USB-C connector, one port has
CH340E USB-UART on it for the console, the other port goes to the SoC usbphy 0.
So it would be "peripheral" only, I suppose.

-- 
Alexander Sverdlin.