linux-kernel - Re: [PATCH v2 2/6] usb: dwc3: qcom: Rename hs_phy_irq to qusb2_phy

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Date:   Thu, 7 Dec 2023 16:28:39 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Krishna Kurapati <quic_kriskura@...cinc.com>
Cc:     Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Wesley Cheng <quic_wcheng@...cinc.com>,
        Conor Dooley <conor+dt@...nel.org>,
        cros-qcom-dts-watchers@...omium.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, quic_ppratap@...cinc.com,
        quic_jackp@...cinc.com
Subject: Re: [PATCH v2 2/6] usb: dwc3: qcom: Rename hs_phy_irq to
 qusb2_phy_irq

On Mon, Dec 04, 2023 at 03:39:46PM +0530, Krishna Kurapati wrote:
> For wakeup to work, driver needs to enable interrupts that depict what is
> happening on th DP/DM lines. On QUSB targets, this is identified by

typo: the

> qusb2_phy whereas on SoCs using Femto PHY, separate {dp,dm}_hs_phy_irq's
> are used instead.
> 
> The implementation incorrectly names qusb2_phy interrupts as "hs_phy_irq".
> Clean this up so that driver would be using only qusb2/(dp & dm) for wakeup
> purposes.

Here too you should say something about why this won't break any systems
booting using an older devicetree. Specifically, the QUSB2 PHY interrupt
has never been armed on any system running mainline as those bits never
made it upstream.

So an alternative to this could also be to just drop the QUSB2 PHY
interrupt handling from this driver for now.

Johan