linux-kernel - Re: [PATCH 3/3] phy: qcom-qmp-usb: clean up pipe clock handling

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Message-ID: <CAA8EJprpED7Ap28YrXQ1MCub20DNLZ_MrXhHcej+V_SZqfBk-g@mail.gmail.com>
Date:   Thu, 23 Jun 2022 14:45:34 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Vinod Koul <vkoul@...nel.org>, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] phy: qcom-qmp-usb: clean up pipe clock handling

On Thu, 23 Jun 2022 at 14:33, Johan Hovold <johan+linaro@...nel.org> wrote:
>
> Clean up the pipe clock handling by using dev_err_probe() to handle
> probe deferral and dropping the obsolete comment that claimed that the
> pipe clock was optional for some other PHY types.
>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---
>  drivers/phy/qualcomm/phy-qcom-qmp-usb.c | 15 ++-------------
>  1 file changed, 2 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
> index aebe5ed4e4e3..40e87f75ec4a 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
> @@ -2530,22 +2530,11 @@ int qcom_qmp_phy_usb_create(struct device *dev, struct device_node *np, int id,
>         if (!qphy->pcs_misc)
>                 dev_vdbg(dev, "PHY pcs_misc-reg not used\n");
>
> -       /*
> -        * Get PHY's Pipe clock, if any. USB3 and PCIe are PIPE3
> -        * based phys, so they essentially have pipe clock. So,
> -        * we return error in case phy is USB3 or PIPE type.
> -        * Otherwise, we initialize pipe clock to NULL for
> -        * all phys that don't need this.
> -        */
>         snprintf(prop_name, sizeof(prop_name), "pipe%d", id);
>         qphy->pipe_clk = devm_get_clk_from_child(dev, np, prop_name);
>         if (IS_ERR(qphy->pipe_clk)) {
> -               ret = PTR_ERR(qphy->pipe_clk);
> -               if (ret != -EPROBE_DEFER)
> -                       dev_err(dev,
> -                               "failed to get lane%d pipe_clk, %d\n",
> -                               id, ret);
> -               return ret;
> +               return dev_err_probe(dev, PTR_ERR(qphy->pipe_clk),
> +                                    "failed to get lane%d pipe clock\n", id);
>         }

And here too. Afterwards:

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

>
>         generic_phy = devm_phy_create(dev, np, &qcom_qmp_phy_usb_ops);
> --
> 2.35.1
>


-- 
With best wishes
Dmitry