Commit bb6243b4 authored by Bartosz Golaszewski's avatar Bartosz Golaszewski Committed by Greg Kroah-Hartman
Browse files

drivers: platform: provide devm_platform_ioremap_resource_wc() 



Provide a write-combined variant of devm_platform_ioremap_resource().

Signed-off-by: default avatarBartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20191022084318.22256-5-brgl@bgdev.pl


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b873af62

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

+1 −0
Original line number Diff line number Diff line
@@ -318,6 +318,7 @@ IOMAP 
  devm_ioremap_resource() : checks resource, requests memory region, ioremaps

  devm_ioremap_resource_wc()

  devm_platform_ioremap_resource() : calls devm_ioremap_resource() for platform device

  devm_platform_ioremap_resource_wc()

  devm_iounmap()

  pcim_iomap()

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

drivers/base/platform.c

+18 −1
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ struct resource *platform_get_resource(struct platform_device *dev, 
}

EXPORT_SYMBOL_GPL(platform_get_resource);



#ifdef CONFIG_HAS_IOMEM

/**

 * devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform

 *				    device
@@ -68,7 +69,6 @@ EXPORT_SYMBOL_GPL(platform_get_resource); 
 *        resource management

 * @index: resource index

 */

#ifdef CONFIG_HAS_IOMEM

void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,

					     unsigned int index)

{
@@ -78,6 +78,23 @@ void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev, 
	return devm_ioremap_resource(&pdev->dev, res);

}

EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource);



/**

 * devm_platform_ioremap_resource_wc - write-combined variant of

 *                                     devm_platform_ioremap_resource()

 *

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

 *        resource management

 * @index: resource index

 */

void __iomem *devm_platform_ioremap_resource_wc(struct platform_device *pdev,

						unsigned int index)

{

	struct resource *res;



	res = platform_get_resource(pdev, IORESOURCE_MEM, index);

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

}

#endif /* CONFIG_HAS_IOMEM */



/**

include/linux/platform_device.h

+3 −0
Original line number Diff line number Diff line
@@ -57,6 +57,9 @@ platform_find_device_by_driver(struct device *start, 
extern void __iomem *

devm_platform_ioremap_resource(struct platform_device *pdev,

			       unsigned int index);

extern void __iomem *

devm_platform_ioremap_resource_wc(struct platform_device *pdev,

				  unsigned int index);

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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