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UPSTREAM: drivers: provide devm_platform_get_and_ioremap_resource()

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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: Geert Uytterhoeven <geert@linux-m68k.org>
Suggested-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Link: https://lore.kernel.org/r/20200323160612.17277-2-zhengdejin5@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
(cherry picked from commit 890cc39a879906b63912482dfc41944579df2dc6)

Change-Id: I2a7b632d7c60cb7b7bc365ee4d6603f306453f6b
This commit is contained in:
Dejin Zheng
2020-03-24 00:06:08 +08:00
committed by Tao Huang
parent f57bb80143
commit 49cbcea661
2 changed files with 25 additions and 0 deletions
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22
drivers/base/platform.c
View File

@ -80,6 +80,28 @@ struct resource *platform_get_resource(struct platform_device *dev,
}
EXPORT_SYMBOL_GPL(platform_get_resource);
/**
* 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

3
include/linux/platform_device.h
View File

@ -52,6 +52,9 @@ extern void arch_setup_pdev_archdata(struct platform_device *);
extern struct resource *platform_get_resource(struct platform_device *,
unsigned int, unsigned int);
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 int platform_get_irq(struct platform_device *, unsigned int);