linux-kernel - Re: [PATCH -next] spi: rockchip-sfc: Use devm_platform_get_and_ioremap

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Date:   Tue, 28 Mar 2023 16:14:51 +0100
From:   Tudor Ambarus <tudor.ambarus@...aro.org>
To:     Yang Li <yang.lee@...ux.alibaba.com>, broonie@...nel.org
Cc:     heiko@...ech.de, linux-spi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] spi: rockchip-sfc: Use
 devm_platform_get_and_ioremap_resource()



On 3/28/23 07:21, Yang Li wrote:
> According to commit 890cc39a8799 ("drivers: provide
> devm_platform_get_and_ioremap_resource()"), 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: Yang Li <yang.lee@...ux.alibaba.com>
> ---
>  drivers/spi/spi-rockchip-sfc.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

If I were you I would make a single patch addressing all the drivers
from SPI as this is a single logical change. You get extra points as you
avoid polluting the log.

> 
> diff --git a/drivers/spi/spi-rockchip-sfc.c b/drivers/spi/spi-rockchip-sfc.c
> index 4fabd2e0439f..6830ecaa270b 100644
> --- a/drivers/spi/spi-rockchip-sfc.c
> +++ b/drivers/spi/spi-rockchip-sfc.c
> @@ -576,8 +576,7 @@ static int rockchip_sfc_probe(struct platform_device *pdev)
>  	sfc = spi_master_get_devdata(master);
>  	sfc->dev = dev;
>  
> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	sfc->regbase = devm_ioremap_resource(dev, res);
> +	sfc->regbase = devm_platform_get_and_ioremap_resource(pdev, 0, &res);

No, you better use devm_platform_ioremap_resource() as res is not used
afterwards. You'll get rid of the local variable too.

>  	if (IS_ERR(sfc->regbase))
>  		return PTR_ERR(sfc->regbase);
>