linux-kernel - Re: [PATCH 2/9] usb: misc: qcom_eud: add sysfs attribute for port selection

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Message-ID: <537a8bcd-360b-41a3-9a3b-58d6f7e4f0e2@oss.qualcomm.com>
Date: Tue, 27 Jan 2026 14:30:45 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Elson Serrao <elson.serrao@....qualcomm.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Souradeep Chowdhury <quic_schowdhu@...cinc.com>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/9] usb: misc: qcom_eud: add sysfs attribute for port
 selection

On 1/17/26 12:20 AM, Elson Serrao wrote:
> EUD can be mapped to either the primary USB port or the secondary USB port
> depending on the value of the EUD_PORT_SEL register. Add a 'port' sysfs
> attribute to allow userspace to select which port EUD should operate on
> and update the ABI documentation. This is needed for systems with dual
> USB ports where EUD needs to be accessible on either port depending on the
> system configuration and use case.
> 
> Signed-off-by: Elson Serrao <elson.serrao@....qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad