From: Andre Przywara <andre.przywara@arm•com>
To: Alexander Sverdlin <alexander.sverdlin@gmail•com>,
linux-sunxi@lists•linux.dev
Cc: Rob Herring <robh@kernel•org>,
Krzysztof Kozlowski <krzk+dt@kernel•org>,
Conor Dooley <conor+dt@kernel•org>,
Chen-Yu Tsai <wens@kernel•org>,
Jernej Skrabec <jernej.skrabec@gmail•com>,
Samuel Holland <samuel@sholland•org>,
devicetree@vger•kernel.org, linux-arm-kernel@lists•infradead.org,
linux-kernel@vger•kernel.org
Subject: Re: [PATCH v2 3/3] arm64: dts: allwinner: A133: add support for Baijie Helper A133 board
Date: Mon, 18 May 2026 14:50:57 +0200 [thread overview]
Message-ID: <4883b037-45b8-4c9a-92ba-72e6b795dc93@arm.com> (raw)
In-Reply-To: <6d8659f393e0bb4f0805107a17e306422982247c.camel@gmail.com>
Hi,
On 5/18/26 13:29, Alexander Sverdlin wrote:
> 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.
Ah, that's interesting, I was wondering about this, but don't think we
have seen this before.
So yeah, then it's definitely peripheral only. And please state in the
comment that it's connected to the downstream port of a hub, so changing
it to "host" will not work.
Thanks,
Andre
next prev parent reply other threads:[~2026-05-18 12:51 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-10 20:16 [PATCH v2 0/3] Add support for Baijie Helper A133 board Alexander Sverdlin
2026-05-10 20:16 ` [PATCH v2 1/3] dt-bindings: vendor-prefixes: Add Shenzhen Baijie Technology Co., Ltd Alexander Sverdlin
2026-05-18 11:36 ` Paul Kocialkowski
2026-05-10 20:16 ` [PATCH v2 2/3] dt-bindings: arm: sunxi: Add Baijie HelperBoard A133 compatible Alexander Sverdlin
2026-05-11 16:08 ` Conor Dooley
2026-05-11 16:18 ` Alexander Sverdlin
2026-05-11 16:34 ` Conor Dooley
2026-05-18 11:35 ` Paul Kocialkowski
2026-05-10 20:16 ` [PATCH v2 3/3] arm64: dts: allwinner: A133: add support for Baijie Helper A133 board Alexander Sverdlin
2026-05-11 11:44 ` Andre Przywara
2026-05-17 20:38 ` Alexander Sverdlin
2026-05-18 3:30 ` Chen-Yu Tsai
2026-05-18 10:12 ` Alexander Sverdlin
2026-05-18 11:16 ` Andre Przywara
2026-05-18 11:29 ` Alexander Sverdlin
2026-05-18 11:54 ` Paul Kocialkowski
2026-05-18 12:50 ` Andre Przywara [this message]
2026-05-18 14:47 ` Chen-Yu Tsai
2026-05-18 14:51 ` Alexander Sverdlin
2026-05-18 11:52 ` Paul Kocialkowski
2026-05-18 12:09 ` Alexander Sverdlin
2026-05-18 14:14 ` Paul Kocialkowski
2026-05-18 14:40 ` Alexander Sverdlin
2026-05-18 14:56 ` Paul Kocialkowski
2026-05-18 15:04 ` Alexander Sverdlin
2026-05-18 21:23 ` Andre Przywara
2026-05-18 20:05 ` Alexander Sverdlin
2026-05-18 21:46 ` Paul Kocialkowski
2026-05-19 3:33 ` Chen-Yu Tsai
2026-05-18 21:54 ` Andre Przywara
2026-06-04 22:37 ` Alexander Sverdlin
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