linux-kernel - Re: [PATCH] soc: mediatek: mutex: Simplify with devm_platform_get_and_ioremap

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Date:   Fri, 8 Jul 2022 10:29:28 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] soc: mediatek: mutex: Simplify with
 devm_platform_get_and_ioremap_resource()



On 23/06/2022 14:17, AngeloGioacchino Del Regno wrote:
> Convert platform_get_resource(), devm_ioremap_resource() to a single
> call to devm_platform_get_and_ioremap_resource(), as this is exactly
> what this function does.
> 
> While at it, also remove a redundant call to of_address_to_resource(),
> as this was getting the address of the same resource index 0: we can
> as well get the iostart from the 'regs' pointer.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Applied, thanks!

> ---
>   drivers/soc/mediatek/mtk-mutex.c | 18 ++++++------------
>   1 file changed, 6 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/soc/mediatek/mtk-mutex.c b/drivers/soc/mediatek/mtk-mutex.c
> index 60cbafea577e..ca8440fb48cd 100644
> --- a/drivers/soc/mediatek/mtk-mutex.c
> +++ b/drivers/soc/mediatek/mtk-mutex.c
> @@ -787,7 +787,7 @@ static int mtk_mutex_probe(struct platform_device *pdev)
>   {
>   	struct device *dev = &pdev->dev;
>   	struct mtk_mutex_ctx *mtx;
> -	struct resource *regs, addr;
> +	struct resource *regs;
>   	int i;
>   #if IS_REACHABLE(CONFIG_MTK_CMDQ)
>   	int ret;
> @@ -811,11 +811,12 @@ static int mtk_mutex_probe(struct platform_device *pdev)
>   		}
>   	}
>   
> -	if (of_address_to_resource(dev->of_node, 0, &addr) < 0) {
> -		dev_err(dev, "Failed to get addr\n");
> -		return -EINVAL;
> +	mtx->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &regs);
> +	if (IS_ERR(mtx->regs)) {
> +		dev_err(dev, "Failed to map mutex registers\n");
> +		return PTR_ERR(mtx->regs);
>   	}
> -	mtx->addr = addr.start;
> +	mtx->addr = regs->start;
>   
>   #if IS_REACHABLE(CONFIG_MTK_CMDQ)
>   	ret = cmdq_dev_get_client_reg(dev, &mtx->cmdq_reg, 0);
> @@ -823,13 +824,6 @@ static int mtk_mutex_probe(struct platform_device *pdev)
>   		dev_dbg(dev, "No mediatek,gce-client-reg!\n");
>   #endif
>   
> -	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	mtx->regs = devm_ioremap_resource(dev, regs);
> -	if (IS_ERR(mtx->regs)) {
> -		dev_err(dev, "Failed to map mutex registers\n");
> -		return PTR_ERR(mtx->regs);
> -	}
> -
>   	platform_set_drvdata(pdev, mtx);
>   
>   	return 0;