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>

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 1c958eb33ef4d2ee3ae7d4dbed3d78368a7603b3..f82691e1c26c087f667432915b808b32ea2d98f6 100644 (file)
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -79,6 +79,24 @@ struct resource *platform_get_resource(struct platform_device *dev,
 }
 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
  * @dev: platform device

diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index c7c081dc6034e7057d69a79680e796d0f48a3831..b126b73ed8efc7249af522824a363e0b0119cdcc 100644 (file)
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -52,6 +52,9 @@ extern struct device platform_bus;
 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_ioremap_resource(struct platform_device *pdev,
+                              unsigned int index);
 extern int platform_get_irq(struct platform_device *, unsigned int);
 extern int platform_irq_count(struct platform_device *);
 extern struct resource *platform_get_resource_byname(struct platform_device *,