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.
Signed-off-by: Dejin Zheng <zhengdejin5@xxxxxxxxx>
---
drivers/base/platform.c | 18 ++++++++++++++++++
include/linux/platform_device.h | 3 +++
2 files changed, 21 insertions(+)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 7fa654f1288b..b3e2409effae 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -62,6 +62,24 @@ struct resource *platform_get_resource(struct platform_device *dev,
EXPORT_SYMBOL_GPL(platform_get_resource);
#ifdef CONFIG_HAS_IOMEM
+/**
+ * devm_platform_ioremap_and_get_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: get the resource
+ */
+void __iomem *
+devm_platform_ioremap_and_get_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_and_get_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 276a03c24691..5fd1977e3eaf 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_ioremap_and_get_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
