linux-kernel - Re: [PATCH v6 8/8] arm64: dts: qcom: sa8540-ride: Enable first port of tertiary usb controller

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Message-ID: <20230414155159.zmhkeoxwhxe5czm5@halaney-x13s>
Date:   Fri, 14 Apr 2023 10:51:59 -0500
From:   Andrew Halaney <ahalaney@...hat.com>
To:     Krishna Kurapati <quic_kriskura@...cinc.com>
Cc:     Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        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>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        quic_pkondeti@...cinc.com, quic_ppratap@...cinc.com,
        quic_wcheng@...cinc.com, quic_jackp@...cinc.com,
        quic_harshq@...cinc.com, quic_shazhuss@...cinc.com
Subject: Re: [PATCH v6 8/8] arm64: dts: qcom: sa8540-ride: Enable first port
 of tertiary usb controller

On Wed, Apr 05, 2023 at 06:27:59PM +0530, Krishna Kurapati wrote:
> Enable first port of Quad port Tertiary USB controller for SA8540 Ride.
> 
> Signed-off-by: Krishna Kurapati <quic_kriskura@...cinc.com>

This is nitpicky, but I liked some of the description in the first[0]
version of this patch that I authored for you:

    From dcb27d07f079194ebd7efe1c9bec64da78beb290 Mon Sep 17 00:00:00 2001
    From: Andrew Halaney <ahalaney@...hat.com>
    Date: Thu, 19 Jan 2023 14:53:38 -0600
    Subject: [PATCH] arm64: dts: qcom: sa8540p-ride: Enable usb_2
    Content-type: text/plain

    There is now support for the multiport USB controller this uses
    so enable it.

    The board only has a single port hooked up (despite it being wired up to
    the multiport IP on the SoC). There's also a USB 2.0 mux hooked up,
    which by default on boot is selected to mux properly. Grab the gpio
    controlling that and ensure it stays in the right position so USB 2.0
    continues to be routed from the external port to the SoC.

    Signed-off-by: Andrew Halaney <ahalaney@...hat.com>

Specifically the bit helping explain what the mux, its default state,
etc are things I find explain some of the hardware/patch better. Personal
opinion of course but I'll highlight it since you dropped it out :)

[0] https://lore.kernel.org/linux-arm-msm/20230119220942.ja5gbo3t3fl63gpy@halaney-x13s/

Either way, thanks for taking the patch along and working on this.

Thanks,
Andrew