linux-kernel - Re: [PATCH 4/4] phy: mediatek: phy-mtk-hdmi: Simplify with dev_err

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Message-ID: <78652a88b24bb4c4660d7c7fa31d4dd7b9fe5a46.camel@mediatek.com>
Date:   Thu, 6 Jan 2022 17:20:22 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        <chunkuang.hu@...nel.org>
CC:     <p.zabel@...gutronix.de>, <kishon@...com>, <vkoul@...nel.org>,
        <matthias.bgg@...il.com>, <dri-devel@...ts.freedesktop.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-phy@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/4] phy: mediatek: phy-mtk-hdmi: Simplify with
 dev_err_probe()

On Mon, 2022-01-03 at 16:30 +0100, AngeloGioacchino Del Regno wrote:
> Use the dev_err_probe() helper to simplify error handling during
> probe.
> 
> Signed-off-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@...labora.com>
> ---
>  drivers/phy/mediatek/phy-mtk-hdmi.c | 50 +++++++++++--------------
> ----
>  1 file changed, 19 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/phy/mediatek/phy-mtk-hdmi.c
> b/drivers/phy/mediatek/phy-mtk-hdmi.c
> index e037fa89696c..4f40a6eea004 100644
> --- a/drivers/phy/mediatek/phy-mtk-hdmi.c
> +++ b/drivers/phy/mediatek/phy-mtk-hdmi.c
> @@ -104,20 +104,16 @@ static int mtk_hdmi_phy_probe(struct
> platform_device *pdev)
>  		return PTR_ERR(hdmi_phy->regmap);
>  
>  	ref_clk = devm_clk_get(dev, "pll_ref");
> -	if (IS_ERR(ref_clk)) {
> -		ret = PTR_ERR(ref_clk);
> -		dev_err(&pdev->dev, "Failed to get PLL reference clock:
> %d\n",
> -			ret);
> -		return ret;
> -	}
> +	if (IS_ERR(ref_clk))
> +		return dev_err_probe(dev, PTR_ERR(ref_clk),
> +				     "Failed to get PLL reference
> clock\n");
> +
>  	ref_clk_name = __clk_get_name(ref_clk);
>  
>  	ret = of_property_read_string(dev->of_node, "clock-output-
> names",
>  				      &clk_init.name);
> -	if (ret < 0) {
> -		dev_err(dev, "Failed to read clock-output-names: %d\n",
> ret);
> -		return ret;
> -	}
> +	if (ret < 0)
> +		return dev_err_probe(dev, ret, "Failed to read clock-
> output-names\n");
Seems no need change it if no EPROBE_DEFER happens

>  
>  	hdmi_phy->dev = dev;
>  	hdmi_phy->conf =
> @@ -125,25 +121,19 @@ static int mtk_hdmi_phy_probe(struct
> platform_device *pdev)
>  	mtk_hdmi_phy_clk_get_data(hdmi_phy, &clk_init);
>  	hdmi_phy->pll_hw.init = &clk_init;
>  	hdmi_phy->pll = devm_clk_register(dev, &hdmi_phy->pll_hw);
> -	if (IS_ERR(hdmi_phy->pll)) {
> -		ret = PTR_ERR(hdmi_phy->pll);
> -		dev_err(dev, "Failed to register PLL: %d\n", ret);
> -		return ret;
> -	}
> +	if (IS_ERR(hdmi_phy->pll))
> +		return dev_err_probe(dev, PTR_ERR(hdmi_phy->pll),
> +				    "Failed to register PLL\n");
>  
>  	ret = of_property_read_u32(dev->of_node, "mediatek,ibias",
>  				   &hdmi_phy->ibias);
> -	if (ret < 0) {
> -		dev_err(&pdev->dev, "Failed to get ibias: %d\n", ret);
> -		return ret;
> -	}
> +	if (ret < 0)
> +		return dev_err_probe(dev, ret, "Failed to get
> ibias\n");
ditto

Thanks
>  
>  	ret = of_property_read_u32(dev->of_node, "mediatek,ibias_up",
>  				   &hdmi_phy->ibias_up);
> -	if (ret < 0) {
> -		dev_err(&pdev->dev, "Failed to get ibias up: %d\n",
> ret);
> -		return ret;
> -	}
> +	if (ret < 0)
> +		return dev_err_probe(dev, ret, "Failed to get
> ibias_up\n");
>  
>  	dev_info(dev, "Using default TX DRV impedance: 4.2k/36\n");
>  	hdmi_phy->drv_imp_clk = 0x30;
> @@ -152,17 +142,15 @@ static int mtk_hdmi_phy_probe(struct
> platform_device *pdev)
>  	hdmi_phy->drv_imp_d0 = 0x30;
>  
>  	phy = devm_phy_create(dev, NULL,
> mtk_hdmi_phy_dev_get_ops(hdmi_phy));
> -	if (IS_ERR(phy)) {
> -		dev_err(dev, "Failed to create HDMI PHY\n");
> -		return PTR_ERR(phy);
> -	}
> +	if (IS_ERR(phy))
> +		return dev_err_probe(dev, PTR_ERR(phy), "Cannot create
> HDMI PHY\n");
> +
>  	phy_set_drvdata(phy, hdmi_phy);
>  
>  	phy_provider = devm_of_phy_provider_register(dev,
> of_phy_simple_xlate);
> -	if (IS_ERR(phy_provider)) {
> -		dev_err(dev, "Failed to register HDMI PHY\n");
> -		return PTR_ERR(phy_provider);
> -	}
> +	if (IS_ERR(phy_provider))
> +		return dev_err_probe(dev, PTR_ERR(phy_provider),
> +				     "Failed to register HDMI PHY\n");
>  
>  	if (hdmi_phy->conf->pll_default_off)
>  		hdmi_phy->conf->hdmi_phy_disable_tmds(hdmi_phy);