linux-kernel - Re: [PATCH v5 3/9] phy: qcom-qusb2: Add generic QUSB2 V2 PHY support

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Date:   Thu, 2 Apr 2020 14:39:08 -0700
From:   John Stultz <john.stultz@...aro.org>
To:     Sandeep Maheswaram <sanm@...eaurora.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Stephen Boyd <swboyd@...omium.org>,
        Doug Anderson <dianders@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        linux-arm-msm@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        devicetree@...r.kernel.org, Manu Gautam <mgautam@...eaurora.org>,
        YongQin Liu <yongqin.liu@...aro.org>
Subject: Re: [PATCH v5 3/9] phy: qcom-qusb2: Add generic QUSB2 V2 PHY support

On Mon, Mar 9, 2020 at 2:54 AM Sandeep Maheswaram <sanm@...eaurora.org> wrote:
> @@ -774,8 +774,8 @@ static const struct of_device_id qusb2_phy_of_match_table[] = {
>                 .compatible     = "qcom,msm8998-qusb2-phy",
>                 .data           = &msm8998_phy_cfg,
>         }, {
> -               .compatible     = "qcom,sdm845-qusb2-phy",
> -               .data           = &sdm845_phy_cfg,
> +               .compatible     = "qcom,qusb2-v2-phy",
> +               .data           = &qusb2_v2_phy_cfg,
>         },
>         { },
>  };

Just as a heads up, Yongqin (cc'ed) reported this patch (now upstream)
seems to be causing trouble on the db845c.

It seems like its removing support for the "qcom,sdm845-qusb2-phy"
compatible string, which is documented:
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml#n23

and already in use:
   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/qcom/sdm845.dtsi#n2389

Should this instead have been an addition of the "qcom,qusb2-v2-phy",
line instead of replacing "qcom,sdm845-qusb2-phy"?

thanks
-john