Re: [PATCH v2 1/4] drivers: provide devm_platform_ioremap_and_get_resource()

[Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>]

Hello!

On 14.03.2020 8:26, Dejin Zheng wrote:

> Since commit "drivers: provide devm_platform_ioremap_resource()",
> It was wrap platform_get_resource() and devm_ioremap_resource() as
   ^^ it

> single helper devm_platform_ioremap_resource(). but now, many drivers
> still used platform_get_resource() and devm_ioremap_resource()
> together in the kernel tree. The reason can not be replaced is they
> still need use the resource variables obtained by platform_get_resource().
> so provide this helper.

    Not really sure that's worth the effort...

> Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
> ---
>   drivers/base/platform.c         | 18 ++++++++++++++++++
>   include/linux/platform_device.h |  3 +++
>   2 files changed, 21 insertions(+)
> 
> diff --git a/drivers/base/platform.c b/drivers/base/platform.c
> index 7fa654f1288b..b3e2409effae 100644
> --- a/drivers/base/platform.c
> +++ b/drivers/base/platform.c
> @@ -62,6 +62,24 @@ struct resource *platform_get_resource(struct platform_device *dev,
>   EXPORT_SYMBOL_GPL(platform_get_resource);
>   
>   #ifdef CONFIG_HAS_IOMEM
> +/**
> + * devm_platform_ioremap_and_get_resource - call devm_ioremap_resource() for a
> + *					    platform device and get resource
> + *
> + * @pdev: platform device to use both for memory resource lookup as well as
> + *        resource management
> + * @index: resource index
> + * @res: get the resource
> + */
> +void __iomem *
> +devm_platform_ioremap_and_get_resource(struct platform_device *pdev,
> +				unsigned int index, struct resource **res)
> +{
> +	*res = platform_get_resource(pdev, IORESOURCE_MEM, index);
> +	return devm_ioremap_resource(&pdev->dev, *res);
> +}
> +EXPORT_SYMBOL_GPL(devm_platform_ioremap_and_get_resource);

    That looks more like devm_platform_get_and_ioremap_resource().

[...]

MBR, Sergei