linux-kernel - Re: [PATCH v2 1/3] clk: sprd: Switch from of_iomap() to devm_ioremap

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Date:   Wed, 26 Jun 2019 11:16:36 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Chunyan Zhang <zhang.chunyan@...aro.org>
Cc:     linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Orson Zhai <orsonzhai@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Baolin Wang <baolin.wang@...aro.org>
Subject: Re: [PATCH v2 1/3] clk: sprd: Switch from of_iomap() to devm_ioremap_resource()

Quoting Chunyan Zhang (2019-05-21 18:15:01)
> devm_ioremap_resources() automatically requests resources and devm_ wrappers
> do better error handling and unmapping of the I/O region when needed,
> that would make drivers more clean and simple.
> 
> Signed-off-by: Chunyan Zhang <zhang.chunyan@...aro.org>

Applied to clk-next

> diff --git a/drivers/clk/sprd/common.c b/drivers/clk/sprd/common.c
> index e038b0447206..9ce690999eaa 100644
> --- a/drivers/clk/sprd/common.c
> +++ b/drivers/clk/sprd/common.c
> @@ -50,7 +51,11 @@ int sprd_clk_regmap_init(struct platform_device *pdev,
>                         return PTR_ERR(regmap);
>                 }
>         } else {
> -               base = of_iomap(node, 0);
> +               res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +               base = devm_ioremap_resource(&pdev->dev, res);
> +               if (IS_ERR(base))

There's also devm_platform_ioremap_resource() if you want to save even
more lines!

> +                       return PTR_ERR(base);
> +