Commit 890cc39a authored by Dejin Zheng's avatar Dejin Zheng Committed by Greg Kroah-Hartman
Browse files

drivers: provide devm_platform_get_and_ioremap_resource() 



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

Suggested-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
Suggested-by: default avatarSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarDejin Zheng <zhengdejin5@gmail.com>
Link: https://lore.kernel.org/r/20200323160612.17277-2-zhengdejin5@gmail.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d2e971d8

drivers/base/platform.c

+22 −0
Original line number Diff line number Diff line
@@ -62,6 +62,28 @@ struct resource *platform_get_resource(struct platform_device *dev, 
EXPORT_SYMBOL_GPL(platform_get_resource);



#ifdef CONFIG_HAS_IOMEM

/**

 * devm_platform_get_and_ioremap_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: optional output parameter to store a pointer to the obtained resource.

 */

void __iomem *

devm_platform_get_and_ioremap_resource(struct platform_device *pdev,

				unsigned int index, struct resource **res)

{

	struct resource *r;



	r = platform_get_resource(pdev, IORESOURCE_MEM, index);

	if (res)

		*res = r;

	return devm_ioremap_resource(&pdev->dev, r);

}

EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource);



/**

 * devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform

 *				    device

include/linux/platform_device.h

+3 −0
Original line number Diff line number Diff line
@@ -55,6 +55,9 @@ extern struct device * 
platform_find_device_by_driver(struct device *start,

			       const struct device_driver *drv);

extern void __iomem *

devm_platform_get_and_ioremap_resource(struct platform_device *pdev,

				unsigned int index, struct resource **res);

extern void __iomem *

devm_platform_ioremap_resource(struct platform_device *pdev,

			       unsigned int index);

extern void __iomem *

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