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drivers: platform: provide devm_platform_ioremap_resource_wc()

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Provide a write-combined variant of devm_platform_ioremap_resource().

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20191022084318.22256-5-brgl@bgdev.pl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bartosz Golaszewski 2019-10-22 10:43:14 +02:00 committed by Greg Kroah-Hartman
parent b873af620e
commit bb6243b4f7
3 changed files with 22 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

1
Documentation/driver-api/driver-model/devres.rst
View file

@ -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

19
drivers/base/platform.c
View file

@ -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 */
/**

3
include/linux/platform_device.h
View file

@ -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 *);