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drivers: provide devm_platform_ioremap_resource() 

There are currently 1200+ instances of using platform_get_resource()
and devm_ioremap_resource() together in the kernel tree.

This patch wraps these two calls in a single helper. Thanks to that
we don't have to declare a local variable for struct resource * and can
omit the redundant argument for resource type. We also have one
function call less.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Bartosz Golaszewski 2019-02-20 11:12:39 +00:00 committed by Linus Walleij
parent 3dda927fdb
commit 7945f929f1
2 changed files with 21 additions and 0 deletions
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18
drivers/base/platform.c
View File

@ -79,6 +79,24 @@ struct resource *platform_get_resource(struct platform_device *dev,
} }
EXPORT_SYMBOL_GPL(platform_get_resource); EXPORT_SYMBOL_GPL(platform_get_resource);
/**
* devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform
* device
*
* @pdev: platform device to use both for memory resource lookup as well as
* resource managemend
* @index: resource index
*/
void __iomem *devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index)
{
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, index);
return devm_ioremap_resource(&pdev->dev, res);
}
EXPORT_SYMBOL_GPL(devm_platform_ioremap_resource);
/** /**
* platform_get_irq - get an IRQ for a device * platform_get_irq - get an IRQ for a device
* @dev: platform device * @dev: platform device

3
include/linux/platform_device.h
View File

@ -52,6 +52,9 @@ extern struct device platform_bus;
extern void arch_setup_pdev_archdata(struct platform_device *); extern void arch_setup_pdev_archdata(struct platform_device *);
extern struct resource *platform_get_resource(struct platform_device *, extern struct resource *platform_get_resource(struct platform_device *,
unsigned int, unsigned int); unsigned int, unsigned int);
extern void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index);
extern int platform_get_irq(struct platform_device *, unsigned int); extern int platform_get_irq(struct platform_device *, unsigned int);
extern int platform_irq_count(struct platform_device *); extern int platform_irq_count(struct platform_device *);
extern struct resource *platform_get_resource_byname(struct platform_device *, extern struct resource *platform_get_resource_byname(struct platform_device *,