linux-kernel - Re: [PATCH 4/4] drm/mediatek: mtk_dpi: Use devm_platform_get_and_ioremap

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Message-ID: <CAC=S1ngkoQJKi6AozAOQY1WKvMhMrgKfA8S7MdbqmzSD5rRmdw@mail.gmail.com>
Date:   Thu, 13 Jul 2023 16:34:15 +0800
From:   Fei Shao <fshao@...omium.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     chunkuang.hu@...nel.org, p.zabel@...gutronix.de, airlied@...il.com,
        daniel@...ll.ch, matthias.bgg@...il.com,
        dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH 4/4] drm/mediatek: mtk_dpi: Use devm_platform_get_and_ioremap_resource()

Hi Angelo,

On Wed, Apr 12, 2023 at 7:53 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> Instead of the open-coded platform_get_resource, devm_ioremap_resource
> switch to devm_platform_get_and_ioremap_resource(), doing exactly the
> same.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_dpi.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index 9025111013d3..45535dc7970f 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -1038,8 +1038,7 @@ static int mtk_dpi_probe(struct platform_device *pdev)
>                         dev_dbg(&pdev->dev, "Cannot find pinctrl active!\n");
>                 }
>         }
> -       mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -       dpi->regs = devm_ioremap_resource(dev, mem);
> +       dpi->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);

"mem" appears to be unused elsewhere, so I assume
devm_platform_ioremap_resource() would be a better fit.

Regards,
Fei

>         if (IS_ERR(dpi->regs))
>                 return dev_err_probe(dev, PTR_ERR(dpi->regs),
>                                      "Failed to ioremap mem resource\n");
> --
> 2.40.0
>
>