linux-kernel - Re: [PATCH v2] phy: qcom-qusb2: Re add "qcom,sdm845-qusb2-phy" compat string

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Message-ID: <CAD=FV=Wh9_4a-cDGPdpMrXUi_HmJvS-a2Ubeyo5WG3sgwVWKKQ@mail.gmail.com>
Date:   Thu, 2 Apr 2020 16:49:08 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     John Stultz <john.stultz@...aro.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Manu Gautam <mgautam@...eaurora.org>,
        Sandeep Maheswaram <sanm@...eaurora.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2] phy: qcom-qusb2: Re add "qcom,sdm845-qusb2-phy" compat string

Hi,

On Thu, Apr 2, 2020 at 4:45 PM John Stultz <john.stultz@...aro.org> wrote:
>
> In commit 8fe75cd4cddf ("phy: qcom-qusb2: Add generic QUSB2 V2
> PHY support"), the change was made to add "qcom,qusb2-v2-phy"
> as a generic compat string. However the change also removed
> the "qcom,sdm845-qusb2-phy" compat string, which is documented
> in the binding and already in use.
>
> This patch re-adds the "qcom,sdm845-qusb2-phy" compat string
> which allows the driver to continue to work with existing dts
> entries such as found on the db845c.
>
> Cc: Andy Gross <agross@...nel.org>
> Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> Cc: Rob Herring <robh+dt@...nel.org>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Doug Anderson <dianders@...omium.org>
> Cc: Manu Gautam <mgautam@...eaurora.org>
> Cc: Sandeep Maheswaram <sanm@...eaurora.org>
> Cc: Matthias Kaehlcke <mka@...omium.org>
> Cc: Stephen Boyd <swboyd@...omium.org>
> Cc: Kishon Vijay Abraham I <kishon@...com>
> Cc: linux-arm-msm@...r.kernel.org
> Cc: devicetree@...r.kernel.org
> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Fixes: 8fe75cd4cddf ("phy: qcom-qusb2: Add generic QUSB2 V2 PHY support")
> Reported-by: YongQin Liu <yongqin.liu@...aro.org>
> Signed-off-by: John Stultz <john.stultz@...aro.org>
> ---
> v2: Add deprecation note on "qcom,sdm845-qusb2-phy" string
>     as suggested by Doug.
> ---
>  drivers/phy/qualcomm/phy-qcom-qusb2.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-qusb2.c b/drivers/phy/qualcomm/phy-qcom-qusb2.c
> index 3708d43b7508..393011a05b48 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qusb2.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qusb2.c
> @@ -815,6 +815,13 @@ static const struct of_device_id qusb2_phy_of_match_table[] = {
>         }, {
>                 .compatible     = "qcom,msm8998-qusb2-phy",
>                 .data           = &msm8998_phy_cfg,
> +       }, {
> +               /*
> +                * Deprecated. Only here to support legacy device
> +                * trees that didn't include "qcom,qusb2-v2-phy"
> +                */
> +               .compatible     = "qcom,sdm845-qusb2-phy",
> +               .data           = &qusb2_v2_phy_cfg,

Thanks for adding the comment.  With that, I'll still grumble but I'm
OK with this if people really want it.

Reviewed-by: Douglas Anderson <dianders@...omium.org>

-Doug