From: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
To: Alexander Koskovich <AKoskovich@pm.me>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFC 0/2] usb: typec: qcom: Add shared USBIN VBUS detection via GPIO
Date: Wed, 11 Mar 2026 14:50:53 +0000 [thread overview]
Message-ID: <920ae606-3d7d-4f61-9d11-bd970abc5177@linaro.org> (raw)
In-Reply-To: <20260308-qcom-typec-shared-vbus-v1-0-7d574b91052a@pm.me>
On 08/03/2026 23:20, Alexander Koskovich wrote:
> The ASUS ROG Phone 3 has two USB-C ports whose VBUS lines are both
> wired to the single USBIN input on the PM8150B PMIC. This means the
> Type-C port controller cannot distinguish which port is providing
> VBUS, causing one port to be unusable when the other has VBUS present
> from a charger or PC.
Hrmm..
If you have a GPIO for VBUS detect then who is sourcing VBUS in host mode ?
There should be a GPIO to switch it on aswell ? And in this case both
ports will become "hot" at the same time.
How does VBUS work in host mode here ?
---
bod
next prev parent reply other threads:[~2026-03-11 14:50 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-08 23:20 Alexander Koskovich
2026-03-08 23:20 ` [PATCH RFC 1/2] dt-bindings: usb: qcom,pmic-typec: Document vbus-detect-gpios property Alexander Koskovich
2026-03-11 23:02 ` Bryan O'Donoghue
2026-03-16 10:15 ` Konrad Dybcio
2026-03-12 2:34 ` Dmitry Baryshkov
2026-03-12 2:59 ` Alexander Koskovich
2026-03-08 23:20 ` [PATCH RFC 2/2] usb: typec: qcom: Add support for shared USBIN VBUS detection Alexander Koskovich
2026-03-11 13:01 ` Konrad Dybcio
2026-03-11 14:39 ` Bryan O'Donoghue
2026-03-11 16:24 ` Alexander Koskovich
2026-03-11 23:05 ` Bryan O'Donoghue
2026-03-12 6:18 ` Alexander Koskovich
2026-03-11 14:50 ` Bryan O'Donoghue [this message]
2026-03-11 17:37 ` [PATCH RFC 0/2] usb: typec: qcom: Add shared USBIN VBUS detection via GPIO Alexander Koskovich
2026-03-11 23:00 ` Bryan O'Donoghue
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