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>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 1c958eb33ef4..f82691e1c26c 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -80,6 +80,24 @@ 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
  * @num: IRQ number index