Commit c9c8641d authored by Bartosz Golaszewski's avatar Bartosz Golaszewski Committed by Greg Kroah-Hartman
Browse files

drivers: provide devm_platform_ioremap_resource_byname() 



Provide a variant of devm_platform_ioremap_resource() that allows to
lookup resources from platform devices by name rather than by index.

Signed-off-by: default avatarBartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20191022084318.22256-7-brgl@bgdev.pl


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 444b0111

Documentation/driver-api/driver-model/devres.rst

+1 −0
Original line number Diff line number Diff line
@@ -319,6 +319,7 @@ IOMAP 
  devm_ioremap_resource_wc()

  devm_platform_ioremap_resource() : calls devm_ioremap_resource() for platform device

  devm_platform_ioremap_resource_wc()

  devm_platform_ioremap_resource_byname()

  devm_iounmap()

  pcim_iomap()

  pcim_iomap_regions()	: do request_region() and iomap() on multiple BARs

drivers/base/platform.c

+20 −0
Original line number Diff line number Diff line
@@ -95,6 +95,26 @@ void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev, 
	res = platform_get_resource(pdev, IORESOURCE_MEM, index);

	return devm_ioremap_resource_wc(&pdev->dev, res);

}



/**

 * devm_platform_ioremap_resource_byname - call devm_ioremap_resource for

 *					   a platform device, retrieve the

 *					   resource by name

 *

 * @pdev: platform device to use both for memory resource lookup as well as

 *	  resource management

 * @name: name of the resource

 */

void __iomem *

devm_platform_ioremap_resource_byname(struct platform_device *pdev,

				      const char *name)

{

	struct resource *res;



	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);

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

}

EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource_byname);

#endif /* CONFIG_HAS_IOMEM */



/**

include/linux/platform_device.h

+3 −0
Original line number Diff line number Diff line
@@ -60,6 +60,9 @@ devm_platform_ioremap_resource(struct platform_device *pdev, 
extern void __iomem *

devm_platform_ioremap_resource_wc(struct platform_device *pdev,

				  unsigned int index);

extern void __iomem *

devm_platform_ioremap_resource_byname(struct platform_device *pdev,

				      const char *name);

extern int platform_get_irq(struct platform_device *, unsigned int);

extern int platform_get_irq_optional(struct platform_device *, unsigned int);

extern int platform_irq_count(struct platform_device *);

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