linux-kernel - Re: [PATCH] i2c: wmt: Use devm_platform_get_and_ioremap

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Date:   Sat, 10 Jun 2023 15:42:53 +0200
From:   Andi Shyti <andi.shyti@...nel.org>
To:     ye.xingchen@....com.cn
Cc:     wsa+renesas@...g-engineering.com,
        linux-arm-kernel@...ts.infradead.org, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: wmt: Use devm_platform_get_and_ioremap_resource()

Hi Ye,

On Sat, Jan 28, 2023 at 02:51:44PM +0800, ye.xingchen@....com.cn wrote:
> From: ye xingchen <ye.xingchen@....com.cn>
> 
> 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.
> 
> Signed-off-by: ye xingchen <ye.xingchen@....com.cn>
> ---
>  drivers/i2c/busses/i2c-wmt.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-wmt.c b/drivers/i2c/busses/i2c-wmt.c
> index 7d4bc8736079..4a3e3985e418 100644
> --- a/drivers/i2c/busses/i2c-wmt.c
> +++ b/drivers/i2c/busses/i2c-wmt.c
> @@ -372,7 +372,6 @@ static int wmt_i2c_probe(struct platform_device *pdev)
>  	struct device_node *np = pdev->dev.of_node;
>  	struct wmt_i2c_dev *i2c_dev;
>  	struct i2c_adapter *adap;
> -	struct resource *res;
>  	int err;
>  	u32 clk_rate;
> 
> @@ -380,8 +379,7 @@ static int wmt_i2c_probe(struct platform_device *pdev)
>  	if (!i2c_dev)
>  		return -ENOMEM;
> 
> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	i2c_dev->base = devm_ioremap_resource(&pdev->dev, res);
> +	i2c_dev->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);

It's also a cleaner way to handle the error when res is NULL.

Reviewed-by: Andi Shyti <andi.shyti@...nel.org> 

Thanks,
Andi

>  	if (IS_ERR(i2c_dev->base))
>  		return PTR_ERR(i2c_dev->base);
> 
> -- 
> 2.25.1