Since commit "drivers: provide devm_platform_ioremap_resource()",
it was wrap platform_get_resource() and devm_ioremap_resource() as
single helper devm_platform_ioremap_resource(). but now, many drivers
still used platform_get_resource() and devm_ioremap_resource()
together in the kernel tree. The reason can not be replaced is they
still need use the resource variables obtained by platform_get_resource().
so provide this helper.
Suggested-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Suggested-by: Sergei Shtylyov <sergei.shtylyov@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Signed-off-by: Dejin Zheng <zhengdejin5@xxxxxxxxx>
---
v3 -> v4:
- modified the description of the parameter res in this patch.
v2 -> v3:
- rename the function to
devm_platform_get_and_ioremap_resource() by Sergei's suggestion.
- make the last parameter res as optional by Geert's suggestion.
v1 -> v2:
- No change.
drivers/base/platform.c | 22 ++++++++++++++++++++++
include/linux/platform_device.h | 3 +++
2 files changed, 25 insertions(+)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 7fa654f1288b..3e8a9fb91dcd 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -62,6 +62,28 @@ struct resource *platform_get_resource(struct platform_device *dev,
EXPORT_SYMBOL_GPL(platform_get_resource);
#ifdef CONFIG_HAS_IOMEM
+/**
+ * devm_platform_get_and_ioremap_resource - call devm_ioremap_resource() for a
+ * platform device and get resource
+ *
+ * @pdev: platform device to use both for memory resource lookup as well as
+ * resource management
+ * @index: resource index
+ * @res: optional output parameter to store a pointer to the obtained resource.
+ */
+void __iomem *
+devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
+ unsigned int index, struct resource **res)
+{
+ struct resource *r;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, index);
+ if (res)
+ *res = r;
+ return devm_ioremap_resource(&pdev->dev, r);
+}
+EXPORT_SYMBOL_GPL(devm_platform_get_and_ioremap_resource);
+
/**
* devm_platform_ioremap_resource - call devm_ioremap_resource() for a platform
* device
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 8e83c6ff140d..8aa6b448450f 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -55,6 +55,9 @@ extern struct device *
platform_find_device_by_driver(struct device *start,
const struct device_driver *drv);
extern void __iomem *
+devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
+ unsigned int index, struct resource **res);
+extern void __iomem *
devm_platform_ioremap_resource(struct platform_device *pdev,
unsigned int index);
extern void __iomem *
--
2.25.0
